X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fada%2Fexp_dist.adb;h=8576cbf94ad8ba687d4e1926fb9c94c1c7c06dd8;hb=5690e662b2b0b7f20f751a0a111a8e28cad42b4e;hp=6b4ced731c983d741c1ad167f21793931b89aa17;hpb=707699278c9eb45735854412512aaf9ddb0f0528;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/ada/exp_dist.adb b/gcc/ada/exp_dist.adb index 6b4ced731c9..8576cbf94ad 100644 --- a/gcc/ada/exp_dist.adb +++ b/gcc/ada/exp_dist.adb @@ -6,49 +6,50 @@ -- -- -- B o d y -- -- -- --- Copyright (C) 1992-2004 Free Software Foundation, Inc. -- +-- Copyright (C) 1992-2008, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- --- ware Foundation; either version 2, or (at your option) any later ver- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- --- Public License distributed with GNAT; see file COPYING. If not, write -- --- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- --- MA 02111-1307, USA. -- +-- Public License distributed with GNAT; see file COPYING3. If not, go to -- +-- http://www.gnu.org/licenses for a complete copy of the license. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -with Atree; use Atree; -with Einfo; use Einfo; -with Elists; use Elists; -with Exp_Strm; use Exp_Strm; -with Exp_Tss; use Exp_Tss; -with Exp_Util; use Exp_Util; +with Atree; use Atree; +with Einfo; use Einfo; +with Elists; use Elists; +with Exp_Atag; use Exp_Atag; +with Exp_Strm; use Exp_Strm; +with Exp_Tss; use Exp_Tss; +with Exp_Util; use Exp_Util; +with Lib; use Lib; +with Nlists; use Nlists; +with Nmake; use Nmake; +with Opt; use Opt; +with Rtsfind; use Rtsfind; +with Sem; use Sem; +with Sem_Cat; use Sem_Cat; +with Sem_Ch3; use Sem_Ch3; +with Sem_Ch8; use Sem_Ch8; +with Sem_Dist; use Sem_Dist; +with Sem_Eval; use Sem_Eval; +with Sem_Util; use Sem_Util; +with Sinfo; use Sinfo; +with Stand; use Stand; +with Stringt; use Stringt; +with Tbuild; use Tbuild; +with Ttypes; use Ttypes; +with Uintp; use Uintp; + with GNAT.HTable; use GNAT.HTable; -with Lib; use Lib; -with Namet; use Namet; -with Nlists; use Nlists; -with Nmake; use Nmake; -with Opt; use Opt; -with Rtsfind; use Rtsfind; -with Sem; use Sem; -with Sem_Ch3; use Sem_Ch3; -with Sem_Ch8; use Sem_Ch8; -with Sem_Dist; use Sem_Dist; -with Sem_Util; use Sem_Util; -with Sinfo; use Sinfo; -with Snames; use Snames; -with Stand; use Stand; -with Stringt; use Stringt; -with Tbuild; use Tbuild; -with Uintp; use Uintp; -with Uname; use Uname; package body Exp_Dist is @@ -66,7 +67,7 @@ package body Exp_Dist is -- converted to and from this type to make it suitable for -- System.Partition_Interface.Get_Unique_Remote_Pointer in order -- to avoid memory leaks when the same remote object arrive on the - -- same partition by following different pathes + -- same partition through several paths; -- 2) It also has the same dispatching table as the designated type D, -- and thus can be used as an object designated by a value of type @@ -76,56 +77,127 @@ package body Exp_Dist is -- to fake half a derivation to ensure that the subprograms do have -- the same dispatching table. + First_RCI_Subprogram_Id : constant := 2; + -- RCI subprograms are numbered starting at 2. The RCI receiver for + -- an RCI package can thus identify calls received through remote + -- access-to-subprogram dereferences by the fact that they have a + -- (primitive) subprogram id of 0, and 1 is used for the internal + -- RAS information lookup operation. (This is for the Garlic code + -- generation, where subprograms are identified by numbers; in the + -- PolyORB version, they are identified by name, with a numeric suffix + -- for homonyms.) + + type Hash_Index is range 0 .. 50; + ----------------------- -- Local subprograms -- ----------------------- - function Get_Subprogram_Id (E : Entity_Id) return Int; - -- Given a subprogram defined in a RCI package, get its subprogram id - -- which will be used for remote calls. - - procedure Build_General_Calling_Stubs - (Decls : in List_Id; - Statements : in List_Id; - Target_Partition : in Entity_Id; - RPC_Receiver : in Node_Id; - Subprogram_Id : in Node_Id; - Asynchronous : in Node_Id := Empty; - Is_Known_Asynchronous : in Boolean := False; - Is_Known_Non_Asynchronous : in Boolean := False; - Is_Function : in Boolean; - Spec : in Node_Id; - Object_Type : in Entity_Id := Empty; - Nod : in Node_Id); - -- Build calling stubs for general purpose. The parameters are: - -- Decls : a place to put declarations - -- Statements : a place to put statements - -- Target_Partition : a node containing the target partition that must - -- be a N_Defining_Identifier - -- RPC_Receiver : a node containing the RPC receiver - -- Subprogram_Id : a node containing the subprogram ID - -- Asynchronous : True if an APC must be made instead of an RPC. - -- The value needs not be supplied if one of the - -- Is_Known_... is True. - -- Is_Known_Async... : True if we know that this is asynchronous - -- Is_Known_Non_A... : True if we know that this is not asynchronous - -- Spec : a node with a Parameter_Specifications and - -- a Subtype_Mark if applicable - -- Object_Type : in case of a RACW, parameters of type access to - -- Object_Type will be marshalled using the - -- address of this object (the addr field) rather - -- than using the 'Write on the object itself - -- Nod : used to provide sloc for generated code + function Hash (F : Entity_Id) return Hash_Index; + -- DSA expansion associates stubs to distributed object types using + -- a hash table on entity ids. + + function Hash (F : Name_Id) return Hash_Index; + -- The generation of subprogram identifiers requires an overload counter + -- to be associated with each remote subprogram names. These counters + -- are maintained in a hash table on name ids. + + type Subprogram_Identifiers is record + Str_Identifier : String_Id; + Int_Identifier : Int; + end record; + + package Subprogram_Identifier_Table is + new Simple_HTable (Header_Num => Hash_Index, + Element => Subprogram_Identifiers, + No_Element => (No_String, 0), + Key => Entity_Id, + Hash => Hash, + Equal => "="); + -- Mapping between a remote subprogram and the corresponding + -- subprogram identifiers. + + package Overload_Counter_Table is + new Simple_HTable (Header_Num => Hash_Index, + Element => Int, + No_Element => 0, + Key => Name_Id, + Hash => Hash, + Equal => "="); + -- Mapping between a subprogram name and an integer that + -- counts the number of defining subprogram names with that + -- Name_Id encountered so far in a given context (an interface). + + function Get_Subprogram_Ids (Def : Entity_Id) return Subprogram_Identifiers; + function Get_Subprogram_Id (Def : Entity_Id) return String_Id; + function Get_Subprogram_Id (Def : Entity_Id) return Int; + -- Given a subprogram defined in a RCI package, get its distribution + -- subprogram identifiers (the distribution identifiers are a unique + -- subprogram number, and the non-qualified subprogram name, in the + -- casing used for the subprogram declaration; if the name is overloaded, + -- a double underscore and a serial number are appended. + -- + -- The integer identifier is used to perform remote calls with GARLIC; + -- the string identifier is used in the case of PolyORB. + -- + -- Although the PolyORB DSA receiving stubs will make a caseless comparison + -- when receiving a call, the calling stubs will create requests with the + -- exact casing of the defining unit name of the called subprogram, so as + -- to allow calls to subprograms on distributed nodes that do distinguish + -- between casings. + -- + -- NOTE: Another design would be to allow a representation clause on + -- subprogram specs: for Subp'Distribution_Identifier use "fooBar"; + + pragma Warnings (Off, Get_Subprogram_Id); + -- One homonym only is unreferenced (specific to the GARLIC version) + + procedure Add_RAS_Dereference_TSS (N : Node_Id); + -- Add a subprogram body for RAS Dereference TSS + + procedure Add_RAS_Proxy_And_Analyze + (Decls : List_Id; + Vis_Decl : Node_Id; + All_Calls_Remote_E : Entity_Id; + Proxy_Object_Addr : out Entity_Id); + -- Add the proxy type required, on the receiving (server) side, to handle + -- calls to the subprogram declared by Vis_Decl through a remote access + -- to subprogram type. All_Calls_Remote_E must be Standard_True if a pragma + -- All_Calls_Remote applies, Standard_False otherwise. The new proxy type + -- is appended to Decls. Proxy_Object_Addr is a constant of type + -- System.Address that designates an instance of the proxy object. + + function Build_Remote_Subprogram_Proxy_Type + (Loc : Source_Ptr; + ACR_Expression : Node_Id) return Node_Id; + -- Build and return a tagged record type definition for an RCI + -- subprogram proxy type. + -- ACR_Expression is use as the initialization value for + -- the All_Calls_Remote component. + + function Build_Get_Unique_RP_Call + (Loc : Source_Ptr; + Pointer : Entity_Id; + Stub_Type : Entity_Id) return List_Id; + -- Build a call to Get_Unique_Remote_Pointer (Pointer), followed by a + -- tag fixup (Get_Unique_Remote_Pointer may have changed Pointer'Tag to + -- RACW_Stub_Type'Tag, while the desired tag is that of Stub_Type). + + function Build_Stub_Tag + (Loc : Source_Ptr; + RACW_Type : Entity_Id) return Node_Id; + -- Return an expression denoting the tag of the stub type associated with + -- RACW_Type. function Build_Subprogram_Calling_Stubs (Vis_Decl : Node_Id; - Subp_Id : Int; + Subp_Id : Node_Id; Asynchronous : Boolean; Dynamically_Asynchronous : Boolean := False; Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; Locator : Entity_Id := Empty; - New_Name : Name_Id := No_Name) - return Node_Id; + New_Name : Name_Id := No_Name) return Node_Id; -- Build the calling stub for a given subprogram with the subprogram ID -- being Subp_Id. If Stub_Type is given, then the "addr" field of -- parameters of this type will be marshalled instead of the object @@ -136,66 +208,38 @@ package body Exp_Dist is -- If Locator is not Empty, it will be used instead of RCI_Cache. If -- New_Name is given, then it will be used instead of the original name. - function Build_Subprogram_Receiving_Stubs - (Vis_Decl : Node_Id; - Asynchronous : Boolean; - Dynamically_Asynchronous : Boolean := False; - Stub_Type : Entity_Id := Empty; - RACW_Type : Entity_Id := Empty; - Parent_Primitive : Entity_Id := Empty) - return Node_Id; - -- Build the receiving stub for a given subprogram. The subprogram - -- declaration is also built by this procedure, and the value returned - -- is a N_Subprogram_Body. If a parameter of type access to Stub_Type is - -- found in the specification, then its address is read from the stream - -- instead of the object itself and converted into an access to - -- class-wide type before doing the real call using any of the RACW type - -- pointing on the designated type. - function Build_RPC_Receiver_Specification - (RPC_Receiver : Entity_Id; - Stream_Parameter : Entity_Id; - Result_Parameter : Entity_Id) - return Node_Id; - -- Make a subprogram specification for an RPC receiver, - -- with the given defining unit name and formal parameters. + (RPC_Receiver : Entity_Id; + Request_Parameter : Entity_Id) return Node_Id; + -- Make a subprogram specification for an RPC receiver, with the given + -- defining unit name and formal parameter. function Build_Ordered_Parameters_List (Spec : Node_Id) return List_Id; -- Return an ordered parameter list: unconstrained parameters are put -- at the beginning of the list and constrained ones are put after. If - -- there are no parameters, an empty list is returned. + -- there are no parameters, an empty list is returned. Special case: + -- the controlling formal of the equivalent RACW operation for a RAS + -- type is always left in first position. + + function Transmit_As_Unconstrained (Typ : Entity_Id) return Boolean; + -- True when Typ is an unconstrained type, or a null-excluding access type. + -- In either case, this means stubs cannot contain a default-initialized + -- object declaration of such type. procedure Add_Calling_Stubs_To_Declarations - (Pkg_Spec : in Node_Id; - Decls : in List_Id); + (Pkg_Spec : Node_Id; + Decls : List_Id); -- Add calling stubs to the declarative part - procedure Add_Receiving_Stubs_To_Declarations - (Pkg_Spec : in Node_Id; - Decls : in List_Id); - -- Add receiving stubs to the declarative part - - procedure Add_RAS_Dereference_Attribute (N : in Node_Id); - -- Add a subprogram body for RAS dereference - - procedure Add_RAS_Access_Attribute (N : in Node_Id); - -- Add a subprogram body for RAS Access attribute - function Could_Be_Asynchronous (Spec : Node_Id) return Boolean; -- Return True if nothing prevents the program whose specification is -- given to be asynchronous (i.e. no out parameter). - function Get_Pkg_Name_String_Id (Decl_Node : Node_Id) return String_Id; - function Get_String_Id (Val : String) return String_Id; - -- Ugly functions used to retrieve a package name. Inherited from the - -- old exp_dist.adb and not rewritten yet ??? - function Pack_Entity_Into_Stream_Access (Loc : Source_Ptr; Stream : Node_Id; Object : Entity_Id; - Etyp : Entity_Id := Empty) - return Node_Id; + Etyp : Entity_Id := Empty) return Node_Id; -- Pack Object (of type Etyp) into Stream. If Etyp is not given, -- then Etype (Object) will be used if present. If the type is -- constrained, then 'Write will be used to output the object, @@ -205,62 +249,105 @@ package body Exp_Dist is (Loc : Source_Ptr; Stream : Entity_Id; Object : Node_Id; - Etyp : Entity_Id) - return Node_Id; + Etyp : Entity_Id) return Node_Id; -- Similar to above, with an arbitrary node instead of an entity function Pack_Node_Into_Stream_Access (Loc : Source_Ptr; Stream : Node_Id; Object : Node_Id; - Etyp : Entity_Id) - return Node_Id; + Etyp : Entity_Id) return Node_Id; -- Similar to above, with Stream instead of Stream'Access - function Copy_Specification - (Loc : Source_Ptr; - Spec : Node_Id; - Object_Type : Entity_Id := Empty; - Stub_Type : Entity_Id := Empty; - New_Name : Name_Id := No_Name) - return Node_Id; - -- Build a specification from another one. If Object_Type is not Empty - -- and any access to Object_Type is found, then it is replaced by an - -- access to Stub_Type. If New_Name is given, then it will be used as - -- the name for the newly created spec. + function Make_Selected_Component + (Loc : Source_Ptr; + Prefix : Entity_Id; + Selector_Name : Name_Id) return Node_Id; + -- Return a selected_component whose prefix denotes the given entity, + -- and with the given Selector_Name. function Scope_Of_Spec (Spec : Node_Id) return Entity_Id; -- Return the scope represented by a given spec + procedure Set_Renaming_TSS + (Typ : Entity_Id; + Nam : Entity_Id; + TSS_Nam : TSS_Name_Type); + -- Create a renaming declaration of subprogram Nam, + -- and register it as a TSS for Typ with name TSS_Nam. + function Need_Extra_Constrained (Parameter : Node_Id) return Boolean; -- Return True if the current parameter needs an extra formal to reflect -- its constrained status. function Is_RACW_Controlling_Formal - (Parameter : Node_Id; Stub_Type : Entity_Id) - return Boolean; + (Parameter : Node_Id; + Stub_Type : Entity_Id) return Boolean; -- Return True if the current parameter is a controlling formal argument -- of type Stub_Type or access to Stub_Type. + procedure Declare_Create_NVList + (Loc : Source_Ptr; + NVList : Entity_Id; + Decls : List_Id; + Stmts : List_Id); + -- Append the declaration of NVList to Decls, and its + -- initialization to Stmts. + + function Add_Parameter_To_NVList + (Loc : Source_Ptr; + NVList : Entity_Id; + Parameter : Entity_Id; + Constrained : Boolean; + RACW_Ctrl : Boolean := False; + Any : Entity_Id) return Node_Id; + -- Return a call to Add_Item to add the Any corresponding to the designated + -- formal Parameter (with the indicated Constrained status) to NVList. + -- RACW_Ctrl must be set to True for controlling formals of distributed + -- object primitive operations. + + -------------------- + -- Stub_Structure -- + -------------------- + + -- This record describes various tree fragments associated with the + -- generation of RACW calling stubs. One such record exists for every + -- distributed object type, i.e. each tagged type that is the designated + -- type of one or more RACW type. + type Stub_Structure is record - Stub_Type : Entity_Id; - Stub_Type_Access : Entity_Id; - Object_RPC_Receiver : Entity_Id; - RPC_Receiver_Stream : Entity_Id; - RPC_Receiver_Result : Entity_Id; - RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + -- Stub type: this type has the same primitive operations as the + -- designated types, but the provided bodies for these operations + -- a remote call to an actual target object potentially located on + -- another partition; each value of the stub type encapsulates a + -- reference to a remote object. + + Stub_Type_Access : Entity_Id; + -- A local access type designating the stub type (this is not an RACW + -- type). + + RPC_Receiver_Decl : Node_Id; + -- Declaration for the RPC receiver entity associated with the + -- designated type. As an exception, for the case of an RACW that + -- implements a RAS, no object RPC receiver is generated. Instead, + -- RPC_Receiver_Decl is the declaration after which the RPC receiver + -- would have been inserted. + + Body_Decls : List_Id; + -- List of subprogram bodies to be included in generated code: bodies + -- for the RACW's stream attributes, and for the primitive operations + -- of the stub type. + + RACW_Type : Entity_Id; + -- One of the RACW types designating this distributed object type + -- (they are all interchangeable; we use any one of them in order to + -- avoid having to create various anonymous access types). + end record; - -- This structure is necessary because of the two phases analysis of - -- a RACW declaration occurring in the same Remote_Types package as the - -- designated type. RACW_Type is any of the RACW types pointing on this - -- designated type, it is used here to save an anonymous type creation - -- for each primitive operation. Empty_Stub_Structure : constant Stub_Structure := - (Empty, Empty, Empty, Empty, Empty, Empty); - - type Hash_Index is range 0 .. 50; - function Hash (F : Entity_Id) return Hash_Index; + (Empty, Empty, Empty, No_List, Empty); package Stubs_Table is new Simple_HTable (Header_Num => Hash_Index, @@ -273,13 +360,13 @@ package body Exp_Dist is package Asynchronous_Flags_Table is new Simple_HTable (Header_Num => Hash_Index, - Element => Node_Id, + Element => Entity_Id, No_Element => Empty, Key => Entity_Id, Hash => Hash, Equal => "="); - -- Mapping between a RACW type and the node holding the value True if - -- the RACW is asynchronous and False otherwise. + -- Mapping between a RACW type and a constant having the value True + -- if the RACW is asynchronous and False otherwise. package RCI_Locator_Table is new Simple_HTable (Header_Num => Hash_Index, @@ -289,7 +376,7 @@ package body Exp_Dist is Hash => Hash, Equal => "="); -- Mapping between a RCI package on which All_Calls_Remote applies and - -- the generic instantiation of RCI_Info for this package. + -- the generic instantiation of RCI_Locator for this package. package RCI_Calling_Stubs_Table is new Simple_HTable (Header_Num => Hash_Index, @@ -300,52 +387,46 @@ package body Exp_Dist is Equal => "="); -- Mapping between a RCI subprogram and the corresponding calling stubs + function Get_Stub_Elements (RACW_Type : Entity_Id) return Stub_Structure; + -- Return the stub information associated with the given RACW type + procedure Add_Stub_Type - (Designated_Type : in Entity_Id; - RACW_Type : in Entity_Id; - Decls : in List_Id; - Stub_Type : out Entity_Id; - Stub_Type_Access : out Entity_Id; - Object_RPC_Receiver : out Entity_Id; - Existing : out Boolean); + (Designated_Type : Entity_Id; + RACW_Type : Entity_Id; + Decls : List_Id; + Stub_Type : out Entity_Id; + Stub_Type_Access : out Entity_Id; + RPC_Receiver_Decl : out Node_Id; + Body_Decls : out List_Id; + Existing : out Boolean); -- Add the declaration of the stub type, the access to stub type and the -- object RPC receiver at the end of Decls. If these already exist, -- then nothing is added in the tree but the right values are returned -- anyhow and Existing is set to True. - procedure Add_RACW_Read_Attribute - (RACW_Type : in Entity_Id; - Stub_Type : in Entity_Id; - Stub_Type_Access : in Entity_Id; - Declarations : in List_Id); - -- Add Read attribute in Decls for the RACW type. The Read attribute - -- is added right after the RACW_Type declaration while the body is - -- inserted after Declarations. - - procedure Add_RACW_Write_Attribute - (RACW_Type : in Entity_Id; - Stub_Type : in Entity_Id; - Stub_Type_Access : in Entity_Id; - Object_RPC_Receiver : in Entity_Id; - Declarations : in List_Id); - -- Same thing for the Write attribute - - procedure Add_RACW_Read_Write_Attributes - (RACW_Type : in Entity_Id; - Stub_Type : in Entity_Id; - Stub_Type_Access : in Entity_Id; - Object_RPC_Receiver : in Entity_Id; - Declarations : in List_Id); - -- Add Read and Write attributes declarations and bodies for a given - -- RACW type. The declarations are added just after the declaration - -- of the RACW type itself, while the bodies are inserted at the end - -- of Decls. + function Get_And_Reset_RACW_Bodies (RACW_Type : Entity_Id) return List_Id; + -- Retrieve the Body_Decls list associated to RACW_Type in the stub + -- structure table, reset it to No_List, and return the previous value. + + procedure Add_RACW_Asynchronous_Flag + (Declarations : List_Id; + RACW_Type : Entity_Id); + -- Declare a boolean constant associated with RACW_Type whose value + -- indicates at run time whether a pragma Asynchronous applies to it. + + procedure Assign_Subprogram_Identifier + (Def : Entity_Id; + Spn : Int; + Id : out String_Id); + -- Determine the distribution subprogram identifier to + -- be used for remote subprogram Def, return it in Id and + -- store it in a hash table for later retrieval by + -- Get_Subprogram_Id. Spn is the subprogram number. function RCI_Package_Locator (Loc : Source_Ptr; - Package_Spec : Node_Id) - return Node_Id; - -- Instantiate the generic package RCI_Info in order to locate the + Package_Spec : Node_Id) return Node_Id; + -- Instantiate the generic package RCI_Locator in order to locate the -- RCI package whose spec is given as argument. function Make_Tag_Check (Loc : Source_Ptr; N : Node_Id) return Node_Id; @@ -361,8 +442,7 @@ package body Exp_Dist is function Input_With_Tag_Check (Loc : Source_Ptr; Var_Type : Entity_Id; - Stream : Entity_Id) - return Node_Id; + Stream : Node_Id) return Node_Id; -- Return a function with the following form: -- function R return Var_Type is -- begin @@ -373,11 +453,436 @@ package body Exp_Dist is -- Exception_Message (E)); -- end R; + procedure Build_Actual_Object_Declaration + (Object : Entity_Id; + Etyp : Entity_Id; + Variable : Boolean; + Expr : Node_Id; + Decls : List_Id); + -- Build the declaration of an object with the given defining identifier, + -- initialized with Expr if provided, to serve as actual parameter in a + -- server stub. If Variable is true, the declared object will be a variable + -- (case of an out or in out formal), else it will be a constant. Object's + -- Ekind is set accordingly. The declaration, as well as any other + -- declarations it requires, are appended to Decls. + + -------------------------------------------- + -- Hooks for PCS-specific code generation -- + -------------------------------------------- + + -- Part of the code generation circuitry for distribution needs to be + -- tailored for each implementation of the PCS. For each routine that + -- needs to be specialized, a Specific_ wrapper is created, + -- which calls the corresponding in package + -- _Support. + + procedure Specific_Add_RACW_Features + (RACW_Type : Entity_Id; + Desig : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Body_Decls : List_Id); + -- Add declaration for TSSs for a given RACW type. The declarations are + -- added just after the declaration of the RACW type itself. If the RACW + -- appears in the main unit, Body_Decls is a list of declarations to which + -- the bodies are appended. Else Body_Decls is No_List. + -- PCS-specific ancillary subprogram for Add_RACW_Features. + + procedure Specific_Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id); + -- Add declaration for TSSs for a given RAS type. PCS-specific ancillary + -- subprogram for Add_RAST_Features. + + -- An RPC_Target record is used during construction of calling stubs + -- to pass PCS-specific tree fragments corresponding to the information + -- necessary to locate the target of a remote subprogram call. + + type RPC_Target (PCS_Kind : PCS_Names) is record + case PCS_Kind is + when Name_PolyORB_DSA => + Object : Node_Id; + -- An expression whose value is a PolyORB reference to the target + -- object. + + when others => + Partition : Entity_Id; + -- A variable containing the Partition_ID of the target partition + + RPC_Receiver : Node_Id; + -- An expression whose value is the address of the target RPC + -- receiver. + end case; + end record; + + procedure Specific_Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target : RPC_Target; + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id); + -- Build calling stubs for general purpose. The parameters are: + -- Decls : a place to put declarations + -- Statements : a place to put statements + -- Target : PCS-specific target information (see details + -- in RPC_Target declaration). + -- Subprogram_Id : a node containing the subprogram ID + -- Asynchronous : True if an APC must be made instead of an RPC. + -- The value needs not be supplied if one of the + -- Is_Known_... is True. + -- Is_Known_Async... : True if we know that this is asynchronous + -- Is_Known_Non_A... : True if we know that this is not asynchronous + -- Spec : a node with a Parameter_Specifications and + -- a Result_Definition if applicable + -- Stub_Type : in case of RACW stubs, parameters of type access + -- to Stub_Type will be marshalled using the + -- address of the object (the addr field) rather + -- than using the 'Write on the stub itself + -- Nod : used to provide sloc for generated code + + function Specific_Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target; + -- Build call target information nodes for use within calling stubs. In the + -- RCI case, RCI_Locator is the entity for the instance of RCI_Locator. If + -- for an RACW, Controlling_Parameter is the entity for the controlling + -- formal parameter used to determine the location of the target of the + -- call. Decls provides a location where variable declarations can be + -- appended to construct the necessary values. + + procedure Specific_Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id); + -- Build a type declaration for the stub type associated with an RACW + -- type, and the necessary RPC receiver, if applicable. PCS-specific + -- ancillary subprogram for Add_Stub_Type. If no RPC receiver declaration + -- is generated, then RPC_Receiver_Decl is set to Empty. + + procedure Specific_Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id); + -- Make a subprogram body for an RPC receiver, with the given + -- defining unit name. On return: + -- - Subp_Id is the subprogram identifier from the PCS. + -- - Subp_Index is the index in the list of subprograms + -- used for dispatching (a variable of type Subprogram_Id). + -- - Stmts is the place where the request dispatching + -- statements can occur, + -- - Decl is the subprogram body declaration. + + function Specific_Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id; + -- Build the receiving stub for a given subprogram. The subprogram + -- declaration is also built by this procedure, and the value returned + -- is a N_Subprogram_Body. If a parameter of type access to Stub_Type is + -- found in the specification, then its address is read from the stream + -- instead of the object itself and converted into an access to + -- class-wide type before doing the real call using any of the RACW type + -- pointing on the designated type. + + procedure Specific_Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure); + -- Add the necessary code to Decls after the completion of generation + -- of the RACW RPC receiver described by Stub_Elements. + + procedure Specific_Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id; + Stmts : List_Id); + -- Add receiving stubs to the declarative part of an RCI unit + + package GARLIC_Support is + + -- Support for generating DSA code that uses the GARLIC PCS + + -- The subprograms below provide the GARLIC versions of the + -- corresponding Specific_ routine declared above. + + procedure Add_RACW_Features + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Body_Decls : List_Id); + + procedure Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id); + + procedure Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target_Partition : Entity_Id; -- From RPC_Target + Target_RPC_Receiver : Node_Id; -- From RPC_Target + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id); + + function Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target; + + procedure Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id); + + function Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id; + + procedure Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure); + + procedure Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id; + Stmts : List_Id); + + procedure Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id); + + end GARLIC_Support; + + package PolyORB_Support is + + -- Support for generating DSA code that uses the PolyORB PCS + + -- The subprograms below provide the PolyORB versions of the + -- corresponding Specific_ routine declared above. + + procedure Add_RACW_Features + (RACW_Type : Entity_Id; + Desig : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Body_Decls : List_Id); + + procedure Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id); + + procedure Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target_Object : Node_Id; -- From RPC_Target + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id); + + function Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target; + + procedure Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id); + + function Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id; + + procedure Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure); + + procedure Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id; + Stmts : List_Id); + + procedure Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id); + + procedure Reserve_NamingContext_Methods; + -- Mark the method names for interface NamingContext as already used in + -- the overload table, so no clashes occur with user code (with the + -- PolyORB PCS, RCIs Implement The NamingContext interface to allow + -- their methods to be accessed as objects, for the implementation of + -- remote access-to-subprogram types). + + package Helpers is + + -- Routines to build distribution helper subprograms for user-defined + -- types. For implementation of the Distributed systems annex (DSA) + -- over the PolyORB generic middleware components, it is necessary to + -- generate several supporting subprograms for each application data + -- type used in inter-partition communication. These subprograms are: + + -- A Typecode function returning a high-level description of the + -- type's structure; + + -- Two conversion functions allowing conversion of values of the + -- type from and to the generic data containers used by PolyORB. + -- These generic containers are called 'Any' type values after the + -- CORBA terminology, and hence the conversion subprograms are + -- named To_Any and From_Any. + + function Build_From_Any_Call + (Typ : Entity_Id; + N : Node_Id; + Decls : List_Id) return Node_Id; + -- Build call to From_Any attribute function of type Typ with + -- expression N as actual parameter. Decls is the declarations list + -- for an appropriate enclosing scope of the point where the call + -- will be inserted; if the From_Any attribute for Typ needs to be + -- generated at this point, its declaration is appended to Decls. + + procedure Build_From_Any_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id); + -- Build From_Any attribute function for Typ. Loc is the reference + -- location for generated nodes, Typ is the type for which the + -- conversion function is generated. On return, Decl and Fnam contain + -- the declaration and entity for the newly-created function. + + function Build_To_Any_Call + (N : Node_Id; + Decls : List_Id) return Node_Id; + -- Build call to To_Any attribute function with expression as actual + -- parameter. Decls is the declarations list for an appropriate + -- enclosing scope of the point where the call will be inserted; if + -- the To_Any attribute for Typ needs to be generated at this point, + -- its declaration is appended to Decls. + + procedure Build_To_Any_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id); + -- Build To_Any attribute function for Typ. Loc is the reference + -- location for generated nodes, Typ is the type for which the + -- conversion function is generated. On return, Decl and Fnam contain + -- the declaration and entity for the newly-created function. + + function Build_TypeCode_Call + (Loc : Source_Ptr; + Typ : Entity_Id; + Decls : List_Id) return Node_Id; + -- Build call to TypeCode attribute function for Typ. Decls is the + -- declarations list for an appropriate enclosing scope of the point + -- where the call will be inserted; if the To_Any attribute for Typ + -- needs to be generated at this point, its declaration is appended + -- to Decls. + + procedure Build_TypeCode_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id); + -- Build TypeCode attribute function for Typ. Loc is the reference + -- location for generated nodes, Typ is the type for which the + -- conversion function is generated. On return, Decl and Fnam contain + -- the declaration and entity for the newly-created function. + + procedure Build_Name_And_Repository_Id + (E : Entity_Id; + Name_Str : out String_Id; + Repo_Id_Str : out String_Id); + -- In the PolyORB distribution model, each distributed object type + -- and each distributed operation has a globally unique identifier, + -- its Repository Id. This subprogram builds and returns two strings + -- for entity E (a distributed object type or operation): one + -- containing the name of E, the second containing its repository id. + + end Helpers; + + end PolyORB_Support; + + -- The following PolyORB-specific subprograms are made visible to Exp_Attr: + + function Build_From_Any_Call + (Typ : Entity_Id; + N : Node_Id; + Decls : List_Id) return Node_Id + renames PolyORB_Support.Helpers.Build_From_Any_Call; + + function Build_To_Any_Call + (N : Node_Id; + Decls : List_Id) return Node_Id + renames PolyORB_Support.Helpers.Build_To_Any_Call; + + function Build_TypeCode_Call + (Loc : Source_Ptr; + Typ : Entity_Id; + Decls : List_Id) return Node_Id + renames PolyORB_Support.Helpers.Build_TypeCode_Call; + ------------------------------------ -- Local variables and structures -- ------------------------------------ RCI_Cache : Node_Id; + -- Needs comments ??? Output_From_Constrained : constant array (Boolean) of Name_Id := (False => Name_Output, @@ -392,24 +897,27 @@ package body Exp_Dist is --------------------------------------- procedure Add_Calling_Stubs_To_Declarations - (Pkg_Spec : in Node_Id; - Decls : in List_Id) + (Pkg_Spec : Node_Id; + Decls : List_Id) is - Current_Subprogram_Number : Int := 0; - Current_Declaration : Node_Id; - - Loc : constant Source_Ptr := Sloc (Pkg_Spec); + Current_Subprogram_Number : Int := First_RCI_Subprogram_Id; + -- Subprogram id 0 is reserved for calls received from + -- remote access-to-subprogram dereferences. - RCI_Instantiation : Node_Id; + Current_Declaration : Node_Id; + Loc : constant Source_Ptr := Sloc (Pkg_Spec); + RCI_Instantiation : Node_Id; + Subp_Stubs : Node_Id; + Subp_Str : String_Id; - Subp_Stubs : Node_Id; + pragma Warnings (Off, Subp_Str); begin -- The first thing added is an instantiation of the generic package - -- System.Partition_interface.RCI_Info with the name of the (current) - -- remote package. This will act as an interface with the name server - -- to determine the Partition_ID and the RPC_Receiver for the - -- receiver of this package. + -- System.Partition_Interface.RCI_Locator with the name of this remote + -- package. This will act as an interface with the name server to + -- determine the Partition_ID and the RPC_Receiver for the receiver + -- of this package. RCI_Instantiation := RCI_Package_Locator (Loc, Pkg_Spec); RCI_Cache := Defining_Unit_Name (RCI_Instantiation); @@ -417,27 +925,31 @@ package body Exp_Dist is Append_To (Decls, RCI_Instantiation); Analyze (RCI_Instantiation); - -- For each subprogram declaration visible in the spec, we do - -- build a body. We also increment a counter to assign a different - -- Subprogram_Id to each subprograms. The receiving stubs processing - -- do use the same mechanism and will thus assign the same Id and - -- do the correct dispatching. - - Current_Declaration := First (Visible_Declarations (Pkg_Spec)); + -- For each subprogram declaration visible in the spec, we do build a + -- body. We also increment a counter to assign a different Subprogram_Id + -- to each subprograms. The receiving stubs processing do use the same + -- mechanism and will thus assign the same Id and do the correct + -- dispatching. - while Current_Declaration /= Empty loop + Overload_Counter_Table.Reset; + PolyORB_Support.Reserve_NamingContext_Methods; + Current_Declaration := First (Visible_Declarations (Pkg_Spec)); + while Present (Current_Declaration) loop if Nkind (Current_Declaration) = N_Subprogram_Declaration and then Comes_From_Source (Current_Declaration) then - pragma Assert (Current_Subprogram_Number = - Get_Subprogram_Id (Defining_Unit_Name (Specification ( - Current_Declaration)))); + Assign_Subprogram_Identifier + (Defining_Unit_Name (Specification (Current_Declaration)), + Current_Subprogram_Number, + Subp_Str); Subp_Stubs := Build_Subprogram_Calling_Stubs ( Vis_Decl => Current_Declaration, - Subp_Id => Current_Subprogram_Number, + Subp_Id => + Build_Subprogram_Id (Loc, + Defining_Unit_Name (Specification (Current_Declaration))), Asynchronous => Nkind (Specification (Current_Declaration)) = N_Procedure_Specification @@ -453,52 +965,198 @@ package body Exp_Dist is Next (Current_Declaration); end loop; - end Add_Calling_Stubs_To_Declarations; + ----------------------------- + -- Add_Parameter_To_NVList -- + ----------------------------- + + function Add_Parameter_To_NVList + (Loc : Source_Ptr; + NVList : Entity_Id; + Parameter : Entity_Id; + Constrained : Boolean; + RACW_Ctrl : Boolean := False; + Any : Entity_Id) return Node_Id + is + Parameter_Name_String : String_Id; + Parameter_Mode : Node_Id; + + function Parameter_Passing_Mode + (Loc : Source_Ptr; + Parameter : Entity_Id; + Constrained : Boolean) return Node_Id; + -- Return an expression that denotes the parameter passing mode to be + -- used for Parameter in distribution stubs, where Constrained is + -- Parameter's constrained status. + + ---------------------------- + -- Parameter_Passing_Mode -- + ---------------------------- + + function Parameter_Passing_Mode + (Loc : Source_Ptr; + Parameter : Entity_Id; + Constrained : Boolean) return Node_Id + is + Lib_RE : RE_Id; + + begin + if Out_Present (Parameter) then + if In_Present (Parameter) + or else not Constrained + then + -- Unconstrained formals must be translated + -- to 'in' or 'inout', not 'out', because + -- they need to be constrained by the actual. + + Lib_RE := RE_Mode_Inout; + else + Lib_RE := RE_Mode_Out; + end if; + + else + Lib_RE := RE_Mode_In; + end if; + + return New_Occurrence_Of (RTE (Lib_RE), Loc); + end Parameter_Passing_Mode; + + -- Start of processing for Add_Parameter_To_NVList + + begin + if Nkind (Parameter) = N_Defining_Identifier then + Get_Name_String (Chars (Parameter)); + else + Get_Name_String (Chars (Defining_Identifier (Parameter))); + end if; + + Parameter_Name_String := String_From_Name_Buffer; + + if RACW_Ctrl or else Nkind (Parameter) = N_Defining_Identifier then + + -- When the parameter passed to Add_Parameter_To_NVList is an + -- Extra_Constrained parameter, Parameter is an N_Defining_ + -- Identifier, instead of a complete N_Parameter_Specification. + -- Thus, we explicitly set 'in' mode in this case. + + Parameter_Mode := New_Occurrence_Of (RTE (RE_Mode_In), Loc); + + else + Parameter_Mode := + Parameter_Passing_Mode (Loc, Parameter, Constrained); + end if; + + return + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of + (RTE (RE_NVList_Add_Item), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (NVList, Loc), + Make_Function_Call (Loc, + Name => + New_Occurrence_Of + (RTE (RE_To_PolyORB_String), Loc), + Parameter_Associations => New_List ( + Make_String_Literal (Loc, + Strval => Parameter_Name_String))), + New_Occurrence_Of (Any, Loc), + Parameter_Mode)); + end Add_Parameter_To_NVList; + + -------------------------------- + -- Add_RACW_Asynchronous_Flag -- + -------------------------------- + + procedure Add_RACW_Asynchronous_Flag + (Declarations : List_Id; + RACW_Type : Entity_Id) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); + + Asynchronous_Flag : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_External_Name (Chars (RACW_Type), 'A')); + + begin + -- Declare the asynchronous flag. This flag will be changed to True + -- whenever it is known that the RACW type is asynchronous. + + Append_To (Declarations, + Make_Object_Declaration (Loc, + Defining_Identifier => Asynchronous_Flag, + Constant_Present => True, + Object_Definition => New_Occurrence_Of (Standard_Boolean, Loc), + Expression => New_Occurrence_Of (Standard_False, Loc))); + + Asynchronous_Flags_Table.Set (RACW_Type, Asynchronous_Flag); + end Add_RACW_Asynchronous_Flag; + ----------------------- -- Add_RACW_Features -- ----------------------- - procedure Add_RACW_Features (RACW_Type : in Entity_Id) - is - Desig : constant Entity_Id := - Etype (Designated_Type (RACW_Type)); - Decls : List_Id := - List_Containing (Declaration_Node (RACW_Type)); + procedure Add_RACW_Features (RACW_Type : Entity_Id) is + Desig : constant Entity_Id := Etype (Designated_Type (RACW_Type)); + Same_Scope : constant Boolean := Scope (Desig) = Scope (RACW_Type); - Same_Scope : constant Boolean := - Scope (Desig) = Scope (RACW_Type); + Pkg_Spec : Node_Id; + Decls : List_Id; + Body_Decls : List_Id; - Stub_Type : Entity_Id; - Stub_Type_Access : Entity_Id; - Object_RPC_Receiver : Entity_Id; - Existing : Boolean; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + + Existing : Boolean; + -- True when appropriate stubs have already been generated (this is the + -- case when another RACW with the same designated type has already been + -- encountered), in which case we reuse the previous stubs rather than + -- generating new ones. begin if not Expander_Active then return; end if; + -- Mark the current package declaration as containing an RACW, so that + -- the bodies for the calling stubs and the RACW stream subprograms + -- are attached to the tree when the corresponding body is encountered. + + Set_Has_RACW (Current_Scope); + + -- Look for place to declare the RACW stub type and RACW operations + + Pkg_Spec := Empty; + if Same_Scope then - -- We are declaring a RACW in the same package than its designated - -- type, so the list to use for late declarations must be the - -- private part of the package. We do know that this private part - -- exists since the designated type has to be a private one. + -- Case of declaring the RACW in the same package as its designated + -- type: we know that the designated type is a private type, so we + -- use the private declarations list. - Decls := Private_Declarations - (Package_Specification_Of_Scope (Current_Scope)); + Pkg_Spec := Package_Specification_Of_Scope (Current_Scope); + + if Present (Private_Declarations (Pkg_Spec)) then + Decls := Private_Declarations (Pkg_Spec); + else + Decls := Visible_Declarations (Pkg_Spec); + end if; + + else + + -- Case of declaring the RACW in another package than its designated + -- type: use the private declarations list if present; otherwise + -- use the visible declarations. + + Decls := List_Containing (Declaration_Node (RACW_Type)); - elsif Nkind (Parent (Decls)) = N_Package_Specification - and then Present (Private_Declarations (Parent (Decls))) - then - Decls := Private_Declarations (Parent (Decls)); end if; -- If we were unable to find the declarations, that means that the - -- completion of the type was missing. We can safely return and let - -- the error be caught by the semantic analysis. + -- completion of the type was missing. We can safely return and let the + -- error be caught by the semantic analysis. if No (Decls) then return; @@ -510,60 +1168,90 @@ package body Exp_Dist is Decls => Decls, Stub_Type => Stub_Type, Stub_Type_Access => Stub_Type_Access, - Object_RPC_Receiver => Object_RPC_Receiver, + RPC_Receiver_Decl => RPC_Receiver_Decl, + Body_Decls => Body_Decls, Existing => Existing); - Add_RACW_Read_Write_Attributes + -- If this RACW is not in the main unit, do not generate primitive or + -- TSS bodies. + + if not Entity_Is_In_Main_Unit (RACW_Type) then + Body_Decls := No_List; + end if; + + Add_RACW_Asynchronous_Flag + (Declarations => Decls, + RACW_Type => RACW_Type); + + Specific_Add_RACW_Features (RACW_Type => RACW_Type, + Desig => Desig, Stub_Type => Stub_Type, Stub_Type_Access => Stub_Type_Access, - Object_RPC_Receiver => Object_RPC_Receiver, - Declarations => Decls); + RPC_Receiver_Decl => RPC_Receiver_Decl, + Body_Decls => Body_Decls); - if not Same_Scope and then not Existing then + -- If we already have stubs for this designated type, nothing to do - -- The RACW has been declared in another scope than the designated - -- type and has not been handled by another RACW in the same - -- package as the first one, so add primitive for the stub type - -- here. + if Existing then + return; + end if; + if Is_Frozen (Desig) then + Validate_RACW_Primitives (RACW_Type); Add_RACW_Primitive_Declarations_And_Bodies (Designated_Type => Desig, - Insertion_Node => - Parent (Declaration_Node (Object_RPC_Receiver)), - Decls => Decls); + Insertion_Node => RPC_Receiver_Decl, + Body_Decls => Body_Decls); else + -- Validate_RACW_Primitives requires the list of all primitives of + -- the designated type, so defer processing until Desig is frozen. + -- See Exp_Ch3.Freeze_Type. + Add_Access_Type_To_Process (E => Desig, A => RACW_Type); end if; end Add_RACW_Features; - ------------------------------------------------- - -- Add_RACW_Primitive_Declarations_And_Bodies -- - ------------------------------------------------- + ------------------------------------------------ + -- Add_RACW_Primitive_Declarations_And_Bodies -- + ------------------------------------------------ procedure Add_RACW_Primitive_Declarations_And_Bodies - (Designated_Type : in Entity_Id; - Insertion_Node : in Node_Id; - Decls : in List_Id) + (Designated_Type : Entity_Id; + Insertion_Node : Node_Id; + Body_Decls : List_Id) is - -- Set sloc of generated declaration to be that of the - -- insertion node, so the declarations are recognized as - -- belonging to the current package. - Loc : constant Source_Ptr := Sloc (Insertion_Node); + -- Set Sloc of generated declaration copy of insertion node Sloc, so + -- the declarations are recognized as belonging to the current package. Stub_Elements : constant Stub_Structure := - Stubs_Table.Get (Designated_Type); + Stubs_Table.Get (Designated_Type); pragma Assert (Stub_Elements /= Empty_Stub_Structure); + Is_RAS : constant Boolean := + not Comes_From_Source (Stub_Elements.RACW_Type); + -- Case of the RACW generated to implement a remote access-to- + -- subprogram type. + + Build_Bodies : constant Boolean := + In_Extended_Main_Code_Unit (Stub_Elements.Stub_Type); + -- True when bodies must be prepared in Body_Decls. Bodies are generated + -- only when the main unit is the unit that contains the stub type. + Current_Insertion_Node : Node_Id := Insertion_Node; - RPC_Receiver_Declarations : List_Id; + RPC_Receiver : Entity_Id; RPC_Receiver_Statements : List_Id; RPC_Receiver_Case_Alternatives : constant List_Id := New_List; + RPC_Receiver_Elsif_Parts : List_Id; + RPC_Receiver_Request : Entity_Id; RPC_Receiver_Subp_Id : Entity_Id; + RPC_Receiver_Subp_Index : Entity_Id; + + Subp_Str : String_Id; Current_Primitive_Elmt : Elmt_Id; Current_Primitive : Entity_Id; @@ -571,42 +1259,68 @@ package body Exp_Dist is Current_Primitive_Spec : Node_Id; Current_Primitive_Decl : Node_Id; Current_Primitive_Number : Int := 0; + Current_Primitive_Alias : Node_Id; + Current_Receiver : Entity_Id; + Current_Receiver_Body : Node_Id; + RPC_Receiver_Decl : Node_Id; + Possibly_Asynchronous : Boolean; - Current_Primitive_Alias : Node_Id; + begin + if not Expander_Active then + return; + end if; - Current_Receiver : Entity_Id; - Current_Receiver_Body : Node_Id; + if not Is_RAS then + RPC_Receiver := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('P')); - RPC_Receiver_Decl : Node_Id; + Specific_Build_RPC_Receiver_Body + (RPC_Receiver => RPC_Receiver, + Request => RPC_Receiver_Request, + Subp_Id => RPC_Receiver_Subp_Id, + Subp_Index => RPC_Receiver_Subp_Index, + Stmts => RPC_Receiver_Statements, + Decl => RPC_Receiver_Decl); - Possibly_Asynchronous : Boolean; + if Get_PCS_Name = Name_PolyORB_DSA then - begin - if not Expander_Active then - return; + -- For the case of PolyORB, we need to map a textual operation + -- name into a primitive index. Currently we do so using a simple + -- sequence of string comparisons. + + RPC_Receiver_Elsif_Parts := New_List; + end if; end if; -- Build callers, receivers for every primitive operations and a RPC -- receiver for this type. if Present (Primitive_Operations (Designated_Type)) then + Overload_Counter_Table.Reset; Current_Primitive_Elmt := First_Elmt (Primitive_Operations (Designated_Type)); - while Current_Primitive_Elmt /= No_Elmt loop - Current_Primitive := Node (Current_Primitive_Elmt); - -- Copy the primitive of all the parents, except predefined - -- ones that are not remotely dispatching. + -- Copy the primitive of all the parents, except predefined ones + -- that are not remotely dispatching. Also omit hidden primitives + -- (occurs in the case of primitives of interface progenitors + -- other than immediate ancestors of the Designated_Type). if Chars (Current_Primitive) /= Name_uSize and then Chars (Current_Primitive) /= Name_uAlignment - and then not Is_TSS (Current_Primitive, TSS_Deep_Finalize) + and then not + (Is_TSS (Current_Primitive, TSS_Deep_Finalize) or else + Is_TSS (Current_Primitive, TSS_Stream_Input) or else + Is_TSS (Current_Primitive, TSS_Stream_Output) or else + Is_TSS (Current_Primitive, TSS_Stream_Read) or else + Is_TSS (Current_Primitive, TSS_Stream_Write)) + and then not Is_Hidden (Current_Primitive) then - -- The first thing to do is build an up-to-date copy of - -- the spec with all the formals referencing Designated_Type + -- The first thing to do is build an up-to-date copy of the + -- spec with all the formals referencing Designated_Type -- transformed into formals referencing Stub_Type. Since this -- primitive may have been inherited, go back the alias chain -- until the real primitive has been found. @@ -619,70 +1333,111 @@ package body Exp_Dist is Current_Primitive_Alias := Alias (Current_Primitive_Alias); end loop; + -- Copy the spec from the original declaration for the purpose + -- of declaring an overriding subprogram: we need to replace + -- the type of each controlling formal with Stub_Type. The + -- primitive may have been declared for Designated_Type or + -- inherited from some ancestor type for which we do not have + -- an easily determined Entity_Id. We have no systematic way + -- of knowing which type to substitute Stub_Type for. Instead, + -- Copy_Specification relies on the flag Is_Controlling_Formal + -- to determine which formals to change. + Current_Primitive_Spec := Copy_Specification (Loc, Spec => Parent (Current_Primitive_Alias), - Object_Type => Designated_Type, - Stub_Type => Stub_Elements.Stub_Type); + Ctrl_Type => Stub_Elements.Stub_Type); Current_Primitive_Decl := Make_Subprogram_Declaration (Loc, Specification => Current_Primitive_Spec); - Insert_After (Current_Insertion_Node, Current_Primitive_Decl); - Analyze (Current_Primitive_Decl); + Insert_After_And_Analyze (Current_Insertion_Node, + Current_Primitive_Decl); Current_Insertion_Node := Current_Primitive_Decl; Possibly_Asynchronous := Nkind (Current_Primitive_Spec) = N_Procedure_Specification and then Could_Be_Asynchronous (Current_Primitive_Spec); - Current_Primitive_Body := - Build_Subprogram_Calling_Stubs - (Vis_Decl => Current_Primitive_Decl, - Subp_Id => Current_Primitive_Number, - Asynchronous => Possibly_Asynchronous, - Dynamically_Asynchronous => Possibly_Asynchronous, - Stub_Type => Stub_Elements.Stub_Type); - Append_To (Decls, Current_Primitive_Body); + Assign_Subprogram_Identifier ( + Defining_Unit_Name (Current_Primitive_Spec), + Current_Primitive_Number, + Subp_Str); + + if Build_Bodies then + Current_Primitive_Body := + Build_Subprogram_Calling_Stubs + (Vis_Decl => Current_Primitive_Decl, + Subp_Id => + Build_Subprogram_Id (Loc, + Defining_Unit_Name (Current_Primitive_Spec)), + Asynchronous => Possibly_Asynchronous, + Dynamically_Asynchronous => Possibly_Asynchronous, + Stub_Type => Stub_Elements.Stub_Type, + RACW_Type => Stub_Elements.RACW_Type); + Append_To (Body_Decls, Current_Primitive_Body); + + -- Analyzing the body here would cause the Stub type to + -- be frozen, thus preventing subsequent primitive + -- declarations. For this reason, it will be analyzed + -- later in the regular flow (and in the context of the + -- appropriate unit body, see Append_RACW_Bodies). - -- Analyzing the body here would cause the Stub type to be - -- frozen, thus preventing subsequent primitive declarations. - -- For this reason, it will be analyzed later in the - -- regular flow. + end if; -- Build the receiver stubs - Current_Receiver_Body := - Build_Subprogram_Receiving_Stubs - (Vis_Decl => Current_Primitive_Decl, - Asynchronous => Possibly_Asynchronous, - Dynamically_Asynchronous => Possibly_Asynchronous, - Stub_Type => Stub_Elements.Stub_Type, - RACW_Type => Stub_Elements.RACW_Type, - Parent_Primitive => Current_Primitive); - - Current_Receiver := - Defining_Unit_Name (Specification (Current_Receiver_Body)); - - Append_To (Decls, Current_Receiver_Body); - - -- Add a case alternative to the receiver - - Append_To (RPC_Receiver_Case_Alternatives, - Make_Case_Statement_Alternative (Loc, - Discrete_Choices => New_List ( - Make_Integer_Literal (Loc, Current_Primitive_Number)), + if Build_Bodies and then not Is_RAS then + Current_Receiver_Body := + Specific_Build_Subprogram_Receiving_Stubs + (Vis_Decl => Current_Primitive_Decl, + Asynchronous => Possibly_Asynchronous, + Dynamically_Asynchronous => Possibly_Asynchronous, + Stub_Type => Stub_Elements.Stub_Type, + RACW_Type => Stub_Elements.RACW_Type, + Parent_Primitive => Current_Primitive); + + Current_Receiver := Defining_Unit_Name ( + Specification (Current_Receiver_Body)); + + Append_To (Body_Decls, Current_Receiver_Body); + + -- Add a case alternative to the receiver + + if Get_PCS_Name = Name_PolyORB_DSA then + Append_To (RPC_Receiver_Elsif_Parts, + Make_Elsif_Part (Loc, + Condition => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Caseless_String_Eq), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (RPC_Receiver_Subp_Id, Loc), + Make_String_Literal (Loc, Subp_Str))), + + Then_Statements => New_List ( + Make_Assignment_Statement (Loc, + Name => New_Occurrence_Of ( + RPC_Receiver_Subp_Index, Loc), + Expression => + Make_Integer_Literal (Loc, + Intval => Current_Primitive_Number))))); + end if; - Statements => New_List ( - Make_Procedure_Call_Statement (Loc, - Name => - New_Occurrence_Of (Current_Receiver, Loc), - Parameter_Associations => New_List ( - New_Occurrence_Of - (Stub_Elements.RPC_Receiver_Stream, Loc), - New_Occurrence_Of - (Stub_Elements.RPC_Receiver_Result, Loc)))))); + Append_To (RPC_Receiver_Case_Alternatives, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => New_List ( + Make_Integer_Literal (Loc, Current_Primitive_Number)), + + Statements => New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (Current_Receiver, Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (RPC_Receiver_Request, Loc)))))); + end if; -- Increment the index of current primitive @@ -695,3094 +1450,9611 @@ package body Exp_Dist is -- Build the case statement and the heart of the subprogram - Append_To (RPC_Receiver_Case_Alternatives, - Make_Case_Statement_Alternative (Loc, - Discrete_Choices => New_List (Make_Others_Choice (Loc)), - Statements => New_List (Make_Null_Statement (Loc)))); - - RPC_Receiver_Subp_Id := - Make_Defining_Identifier (Loc, New_Internal_Name ('S')); - - RPC_Receiver_Declarations := New_List ( - Make_Object_Declaration (Loc, - Defining_Identifier => RPC_Receiver_Subp_Id, - Object_Definition => - New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc))); - - RPC_Receiver_Statements := New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), - Attribute_Name => - Name_Read, - Expressions => New_List ( - New_Occurrence_Of (Stub_Elements.RPC_Receiver_Stream, Loc), - New_Occurrence_Of (RPC_Receiver_Subp_Id, Loc)))); + if Build_Bodies and then not Is_RAS then + if Get_PCS_Name = Name_PolyORB_DSA + and then Present (First (RPC_Receiver_Elsif_Parts)) + then + Append_To (RPC_Receiver_Statements, + Make_Implicit_If_Statement (Designated_Type, + Condition => New_Occurrence_Of (Standard_False, Loc), + Then_Statements => New_List, + Elsif_Parts => RPC_Receiver_Elsif_Parts)); + end if; - Append_To (RPC_Receiver_Statements, - Make_Case_Statement (Loc, - Expression => - New_Occurrence_Of (RPC_Receiver_Subp_Id, Loc), - Alternatives => RPC_Receiver_Case_Alternatives)); + Append_To (RPC_Receiver_Case_Alternatives, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => New_List (Make_Others_Choice (Loc)), + Statements => New_List (Make_Null_Statement (Loc)))); - RPC_Receiver_Decl := - Make_Subprogram_Body (Loc, - Specification => - Copy_Specification (Loc, - Parent (Stub_Elements.Object_RPC_Receiver)), - Declarations => RPC_Receiver_Declarations, - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, - Statements => RPC_Receiver_Statements)); + Append_To (RPC_Receiver_Statements, + Make_Case_Statement (Loc, + Expression => + New_Occurrence_Of (RPC_Receiver_Subp_Index, Loc), + Alternatives => RPC_Receiver_Case_Alternatives)); - Append_To (Decls, RPC_Receiver_Decl); + Append_To (Body_Decls, RPC_Receiver_Decl); + Specific_Add_Obj_RPC_Receiver_Completion (Loc, + Body_Decls, RPC_Receiver, Stub_Elements); - -- Do not analyze RPC receiver at this stage since it will otherwise - -- reference subprograms that have not been analyzed yet. It will - -- be analyzed in the regular flow. + -- Do not analyze RPC receiver body at this stage since it references + -- subprograms that have not been analyzed yet. It will be analyzed in + -- the regular flow (see Append_RACW_Bodies). + end if; end Add_RACW_Primitive_Declarations_And_Bodies; ----------------------------- - -- Add_RACW_Read_Attribute -- + -- Add_RAS_Dereference_TSS -- ----------------------------- - procedure Add_RACW_Read_Attribute - (RACW_Type : in Entity_Id; - Stub_Type : in Entity_Id; - Stub_Type_Access : in Entity_Id; - Declarations : in List_Id) - is - Loc : constant Source_Ptr := Sloc (RACW_Type); + procedure Add_RAS_Dereference_TSS (N : Node_Id) is + Loc : constant Source_Ptr := Sloc (N); - Proc_Decl : Node_Id; - Attr_Decl : Node_Id; + Type_Def : constant Node_Id := Type_Definition (N); + RAS_Type : constant Entity_Id := Defining_Identifier (N); + Fat_Type : constant Entity_Id := Equivalent_Type (RAS_Type); + RACW_Type : constant Entity_Id := Underlying_RACW_Type (RAS_Type); - Body_Node : Node_Id; + RACW_Primitive_Name : Node_Id; - Decls : List_Id; - Statements : List_Id; - Local_Statements : List_Id; - Remote_Statements : List_Id; - -- Various parts of the procedure - - Procedure_Name : constant Name_Id := - New_Internal_Name ('R'); - Source_Partition : constant Entity_Id := - Make_Defining_Identifier - (Loc, New_Internal_Name ('P')); - Source_Receiver : constant Entity_Id := - Make_Defining_Identifier - (Loc, New_Internal_Name ('S')); - Source_Address : constant Entity_Id := - Make_Defining_Identifier - (Loc, New_Internal_Name ('P')); - Stubbed_Result : constant Entity_Id := - Make_Defining_Identifier - (Loc, New_Internal_Name ('S')); - Asynchronous_Flag : constant Entity_Id := - Make_Defining_Identifier - (Loc, New_Internal_Name ('S')); - Asynchronous_Node : constant Node_Id := - New_Occurrence_Of (Standard_False, Loc); + Proc : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Make_TSS_Name (RAS_Type, TSS_RAS_Dereference)); - -- Functions to create occurrences of the formal - -- parameter names. + Proc_Spec : Node_Id; + Param_Specs : List_Id; + Param_Assoc : constant List_Id := New_List; + Stmts : constant List_Id := New_List; - function Stream_Parameter return Node_Id; - function Result return Node_Id; + RAS_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('P')); - function Stream_Parameter return Node_Id is - begin - return Make_Identifier (Loc, Name_S); - end Stream_Parameter; + Is_Function : constant Boolean := + Nkind (Type_Def) = N_Access_Function_Definition; - function Result return Node_Id is - begin - return Make_Identifier (Loc, Name_V); - end Result; + Is_Degenerate : Boolean; + -- Set to True if the subprogram_specification for this RAS has an + -- anonymous access parameter (see Process_Remote_AST_Declaration). - begin - -- Declare the asynchronous flag. This flag will be changed to True - -- whenever it is known that the RACW type is asynchronous. Also, the - -- node gets stored since it may be rewritten when we process the - -- asynchronous pragma. - - Append_To (Declarations, - Make_Object_Declaration (Loc, - Defining_Identifier => Asynchronous_Flag, - Constant_Present => True, - Object_Definition => New_Occurrence_Of (Standard_Boolean, Loc), - Expression => Asynchronous_Node)); + Spec : constant Node_Id := Type_Def; - Asynchronous_Flags_Table.Set (RACW_Type, Asynchronous_Node); + Current_Parameter : Node_Id; - -- Object declarations + -- Start of processing for Add_RAS_Dereference_TSS - Decls := New_List ( - Make_Object_Declaration (Loc, - Defining_Identifier => Source_Partition, - Object_Definition => - New_Occurrence_Of (RTE (RE_Partition_ID), Loc)), + begin + -- The Dereference TSS for a remote access-to-subprogram type has the + -- form: - Make_Object_Declaration (Loc, - Defining_Identifier => Source_Receiver, - Object_Definition => - New_Occurrence_Of (RTE (RE_Unsigned_64), Loc)), + -- [function|procedure] ras_typeRD (RAS_Value, ) + -- [return <>] - Make_Object_Declaration (Loc, - Defining_Identifier => Source_Address, - Object_Definition => - New_Occurrence_Of (RTE (RE_Unsigned_64), Loc)), + -- This is called whenever a value of a RAS type is dereferenced - Make_Object_Declaration (Loc, - Defining_Identifier => Stubbed_Result, - Object_Definition => - New_Occurrence_Of (Stub_Type_Access, Loc))); + -- First construct a list of parameter specifications: - -- Read the source Partition_ID and RPC_Receiver from incoming stream + -- The first formal is the RAS values - Statements := New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (RTE (RE_Partition_ID), Loc), - Attribute_Name => Name_Read, - Expressions => New_List ( - Stream_Parameter, - New_Occurrence_Of (Source_Partition, Loc))), + Param_Specs := New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => RAS_Parameter, + In_Present => True, + Parameter_Type => + New_Occurrence_Of (Fat_Type, Loc))); - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), - Attribute_Name => - Name_Read, - Expressions => New_List ( - Stream_Parameter, - New_Occurrence_Of (Source_Receiver, Loc))), + -- The following formals are copied from the type declaration - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), - Attribute_Name => - Name_Read, - Expressions => New_List ( - Stream_Parameter, - New_Occurrence_Of (Source_Address, Loc)))); + Is_Degenerate := False; + Current_Parameter := First (Parameter_Specifications (Type_Def)); + Parameters : while Present (Current_Parameter) loop + if Nkind (Parameter_Type (Current_Parameter)) = + N_Access_Definition + then + Is_Degenerate := True; + end if; - -- If the Address is Null_Address, then return a null object + Append_To (Param_Specs, + Make_Parameter_Specification (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Chars => Chars (Defining_Identifier (Current_Parameter))), + In_Present => In_Present (Current_Parameter), + Out_Present => Out_Present (Current_Parameter), + Parameter_Type => + New_Copy_Tree (Parameter_Type (Current_Parameter)), + Expression => + New_Copy_Tree (Expression (Current_Parameter)))); + + Append_To (Param_Assoc, + Make_Identifier (Loc, + Chars => Chars (Defining_Identifier (Current_Parameter)))); - Append_To (Statements, - Make_Implicit_If_Statement (RACW_Type, - Condition => - Make_Op_Eq (Loc, - Left_Opnd => New_Occurrence_Of (Source_Address, Loc), - Right_Opnd => Make_Integer_Literal (Loc, Uint_0)), - Then_Statements => New_List ( - Make_Assignment_Statement (Loc, - Name => Result, - Expression => Make_Null (Loc)), - Make_Return_Statement (Loc)))); - - -- If the RACW denotes an object created on the current partition, then - -- Local_Statements will be executed. The real object will be used. - - Local_Statements := New_List ( - Make_Assignment_Statement (Loc, - Name => Result, - Expression => - Unchecked_Convert_To (RACW_Type, - OK_Convert_To (RTE (RE_Address), - New_Occurrence_Of (Source_Address, Loc))))); + Next (Current_Parameter); + end loop Parameters; - -- If the object is located on another partition, then a stub object - -- will be created with all the information needed to rebuild the - -- real object at the other end. + if Is_Degenerate then + Prepend_To (Param_Assoc, New_Occurrence_Of (RAS_Parameter, Loc)); - Remote_Statements := New_List ( + -- Generate a dummy body. This code will never actually be executed, + -- because null is the only legal value for a degenerate RAS type. + -- For legality's sake (in order to avoid generating a function that + -- does not contain a return statement), we include a dummy recursive + -- call on the TSS itself. - Make_Assignment_Statement (Loc, - Name => New_Occurrence_Of (Stubbed_Result, Loc), - Expression => - Make_Allocator (Loc, - New_Occurrence_Of (Stub_Type, Loc))), + Append_To (Stmts, + Make_Raise_Program_Error (Loc, Reason => PE_Explicit_Raise)); + RACW_Primitive_Name := New_Occurrence_Of (Proc, Loc); - Make_Assignment_Statement (Loc, - Name => Make_Selected_Component (Loc, - Prefix => New_Occurrence_Of (Stubbed_Result, Loc), - Selector_Name => Make_Identifier (Loc, Name_Origin)), - Expression => - New_Occurrence_Of (Source_Partition, Loc)), + else + -- For a normal RAS type, we cast the RAS formal to the corresponding + -- tagged type, and perform a dispatching call to its Call primitive + -- operation. - Make_Assignment_Statement (Loc, - Name => Make_Selected_Component (Loc, - Prefix => New_Occurrence_Of (Stubbed_Result, Loc), - Selector_Name => Make_Identifier (Loc, Name_Receiver)), - Expression => - New_Occurrence_Of (Source_Receiver, Loc)), + Prepend_To (Param_Assoc, + Unchecked_Convert_To (RACW_Type, + New_Occurrence_Of (RAS_Parameter, Loc))); - Make_Assignment_Statement (Loc, - Name => Make_Selected_Component (Loc, - Prefix => New_Occurrence_Of (Stubbed_Result, Loc), - Selector_Name => Make_Identifier (Loc, Name_Addr)), - Expression => - New_Occurrence_Of (Source_Address, Loc))); + RACW_Primitive_Name := + Make_Selected_Component (Loc, + Prefix => Scope (RACW_Type), + Selector_Name => Name_uCall); + end if; - Append_To (Remote_Statements, - Make_Assignment_Statement (Loc, - Name => Make_Selected_Component (Loc, - Prefix => New_Occurrence_Of (Stubbed_Result, Loc), - Selector_Name => Make_Identifier (Loc, Name_Asynchronous)), - Expression => - New_Occurrence_Of (Asynchronous_Flag, Loc))); + if Is_Function then + Append_To (Stmts, + Make_Simple_Return_Statement (Loc, + Expression => + Make_Function_Call (Loc, + Name => RACW_Primitive_Name, + Parameter_Associations => Param_Assoc))); - Append_To (Remote_Statements, - Make_Procedure_Call_Statement (Loc, - Name => - New_Occurrence_Of (RTE (RE_Get_Unique_Remote_Pointer), Loc), - Parameter_Associations => New_List ( - Unchecked_Convert_To (RTE (RE_RACW_Stub_Type_Access), - New_Occurrence_Of (Stubbed_Result, Loc))))); + else + Append_To (Stmts, + Make_Procedure_Call_Statement (Loc, + Name => RACW_Primitive_Name, + Parameter_Associations => Param_Assoc)); + end if; - Append_To (Remote_Statements, - Make_Assignment_Statement (Loc, - Name => Result, - Expression => Unchecked_Convert_To (RACW_Type, - New_Occurrence_Of (Stubbed_Result, Loc)))); + -- Build the complete subprogram - -- Distinguish between the local and remote cases, and execute the - -- appropriate piece of code. + if Is_Function then + Proc_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Proc, + Parameter_Specifications => Param_Specs, + Result_Definition => + New_Occurrence_Of ( + Entity (Result_Definition (Spec)), Loc)); - Append_To (Statements, - Make_Implicit_If_Statement (RACW_Type, - Condition => - Make_Op_Eq (Loc, - Left_Opnd => - Make_Function_Call (Loc, - Name => - New_Occurrence_Of (RTE (RE_Get_Local_Partition_Id), Loc)), - Right_Opnd => New_Occurrence_Of (Source_Partition, Loc)), - Then_Statements => Local_Statements, - Else_Statements => Remote_Statements)); - - Build_Stream_Procedure - (Loc, RACW_Type, Body_Node, - Make_Defining_Identifier (Loc, Procedure_Name), - Statements, Outp => True); - Set_Declarations (Body_Node, Decls); - - Proc_Decl := Make_Subprogram_Declaration (Loc, - Copy_Specification (Loc, Specification (Body_Node))); - - Attr_Decl := - Make_Attribute_Definition_Clause (Loc, - Name => New_Occurrence_Of (RACW_Type, Loc), - Chars => Name_Read, - Expression => - New_Occurrence_Of ( - Defining_Unit_Name (Specification (Proc_Decl)), Loc)); + Set_Ekind (Proc, E_Function); + Set_Etype (Proc, + New_Occurrence_Of (Entity (Result_Definition (Spec)), Loc)); - Insert_After (Declaration_Node (RACW_Type), Proc_Decl); - Insert_After (Proc_Decl, Attr_Decl); - Append_To (Declarations, Body_Node); - end Add_RACW_Read_Attribute; + else + Proc_Spec := + Make_Procedure_Specification (Loc, + Defining_Unit_Name => Proc, + Parameter_Specifications => Param_Specs); - ------------------------------------ - -- Add_RACW_Read_Write_Attributes -- - ------------------------------------ + Set_Ekind (Proc, E_Procedure); + Set_Etype (Proc, Standard_Void_Type); + end if; - procedure Add_RACW_Read_Write_Attributes - (RACW_Type : in Entity_Id; - Stub_Type : in Entity_Id; - Stub_Type_Access : in Entity_Id; - Object_RPC_Receiver : in Entity_Id; - Declarations : in List_Id) - is - begin - Add_RACW_Write_Attribute - (RACW_Type => RACW_Type, - Stub_Type => Stub_Type, - Stub_Type_Access => Stub_Type_Access, - Object_RPC_Receiver => Object_RPC_Receiver, - Declarations => Declarations); + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Proc_Spec, + Declarations => New_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stmts))); - Add_RACW_Read_Attribute - (RACW_Type => RACW_Type, - Stub_Type => Stub_Type, - Stub_Type_Access => Stub_Type_Access, - Declarations => Declarations); - end Add_RACW_Read_Write_Attributes; + Set_TSS (Fat_Type, Proc); + end Add_RAS_Dereference_TSS; - ------------------------------ - -- Add_RACW_Write_Attribute -- - ------------------------------ + ------------------------------- + -- Add_RAS_Proxy_And_Analyze -- + ------------------------------- - procedure Add_RACW_Write_Attribute - (RACW_Type : in Entity_Id; - Stub_Type : in Entity_Id; - Stub_Type_Access : in Entity_Id; - Object_RPC_Receiver : in Entity_Id; - Declarations : in List_Id) + procedure Add_RAS_Proxy_And_Analyze + (Decls : List_Id; + Vis_Decl : Node_Id; + All_Calls_Remote_E : Entity_Id; + Proxy_Object_Addr : out Entity_Id) is - Loc : constant Source_Ptr := Sloc (RACW_Type); + Loc : constant Source_Ptr := Sloc (Vis_Decl); - Body_Node : Node_Id; - Proc_Decl : Node_Id; - Attr_Decl : Node_Id; + Subp_Name : constant Entity_Id := + Defining_Unit_Name (Specification (Vis_Decl)); - Statements : List_Id; - Local_Statements : List_Id; - Remote_Statements : List_Id; - Null_Statements : List_Id; + Pkg_Name : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_External_Name (Chars (Subp_Name), 'P', -1)); - Procedure_Name : constant Name_Id := New_Internal_Name ('R'); + Proxy_Type : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => + New_External_Name + (Related_Id => Chars (Subp_Name), + Suffix => 'P')); - -- Functions to create occurrences of the formal - -- parameter names. + Proxy_Type_Full_View : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars (Proxy_Type)); - function Stream_Parameter return Node_Id; - function Object return Node_Id; + Subp_Decl_Spec : constant Node_Id := + Build_RAS_Primitive_Specification + (Subp_Spec => Specification (Vis_Decl), + Remote_Object_Type => Proxy_Type); - function Stream_Parameter return Node_Id is - begin - return Make_Identifier (Loc, Name_S); - end Stream_Parameter; + Subp_Body_Spec : constant Node_Id := + Build_RAS_Primitive_Specification + (Subp_Spec => Specification (Vis_Decl), + Remote_Object_Type => Proxy_Type); - function Object return Node_Id is - begin - return Make_Identifier (Loc, Name_V); - end Object; + Vis_Decls : constant List_Id := New_List; + Pvt_Decls : constant List_Id := New_List; + Actuals : constant List_Id := New_List; + Formal : Node_Id; + Perform_Call : Node_Id; begin - -- Build the code fragment corresponding to the marshalling of a - -- local object. - - Local_Statements := New_List ( + -- type subpP is tagged limited private; - Pack_Entity_Into_Stream_Access (Loc, - Stream => Stream_Parameter, - Object => RTE (RE_Get_Local_Partition_Id)), + Append_To (Vis_Decls, + Make_Private_Type_Declaration (Loc, + Defining_Identifier => Proxy_Type, + Tagged_Present => True, + Limited_Present => True)); - Pack_Node_Into_Stream_Access (Loc, - Stream => Stream_Parameter, - Object => OK_Convert_To (RTE (RE_Unsigned_64), - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Object_RPC_Receiver, Loc), - Attribute_Name => Name_Address)), - Etyp => RTE (RE_Unsigned_64)), + -- [subprogram] Call + -- (Self : access subpP; + -- ...other-formals...) + -- [return T]; - Pack_Node_Into_Stream_Access (Loc, - Stream => Stream_Parameter, - Object => OK_Convert_To (RTE (RE_Unsigned_64), - Make_Attribute_Reference (Loc, - Prefix => - Make_Explicit_Dereference (Loc, - Prefix => Object), - Attribute_Name => Name_Address)), - Etyp => RTE (RE_Unsigned_64))); + Append_To (Vis_Decls, + Make_Subprogram_Declaration (Loc, + Specification => Subp_Decl_Spec)); - -- Build the code fragment corresponding to the marshalling of - -- a remote object. + -- A : constant System.Address; - Remote_Statements := New_List ( + Proxy_Object_Addr := Make_Defining_Identifier (Loc, Name_uA); - Pack_Node_Into_Stream_Access (Loc, - Stream => Stream_Parameter, - Object => - Make_Selected_Component (Loc, - Prefix => Unchecked_Convert_To (Stub_Type_Access, - Object), - Selector_Name => - Make_Identifier (Loc, Name_Origin)), - Etyp => RTE (RE_Partition_ID)), + Append_To (Vis_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Proxy_Object_Addr, + Constant_Present => True, + Object_Definition => New_Occurrence_Of (RTE (RE_Address), Loc))); - Pack_Node_Into_Stream_Access (Loc, - Stream => Stream_Parameter, - Object => - Make_Selected_Component (Loc, - Prefix => Unchecked_Convert_To (Stub_Type_Access, - Object), - Selector_Name => - Make_Identifier (Loc, Name_Receiver)), - Etyp => RTE (RE_Unsigned_64)), + -- private - Pack_Node_Into_Stream_Access (Loc, - Stream => Stream_Parameter, - Object => - Make_Selected_Component (Loc, - Prefix => Unchecked_Convert_To (Stub_Type_Access, - Object), - Selector_Name => - Make_Identifier (Loc, Name_Addr)), - Etyp => RTE (RE_Unsigned_64))); + -- type subpP is tagged limited record + -- All_Calls_Remote : Boolean := [All_Calls_Remote?]; + -- ... + -- end record; - -- Build the code fragment corresponding to the marshalling of a null - -- object. + Append_To (Pvt_Decls, + Make_Full_Type_Declaration (Loc, + Defining_Identifier => Proxy_Type_Full_View, + Type_Definition => + Build_Remote_Subprogram_Proxy_Type (Loc, + New_Occurrence_Of (All_Calls_Remote_E, Loc)))); + + -- Trick semantic analysis into swapping the public and full view when + -- freezing the public view. + + Set_Comes_From_Source (Proxy_Type_Full_View, True); + + -- procedure Call + -- (Self : access O; + -- ...other-formals...) is + -- begin + -- P (...other-formals...); + -- end Call; + + -- function Call + -- (Self : access O; + -- ...other-formals...) + -- return T is + -- begin + -- return F (...other-formals...); + -- end Call; + + if Nkind (Subp_Decl_Spec) = N_Procedure_Specification then + Perform_Call := + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (Subp_Name, Loc), + Parameter_Associations => Actuals); + else + Perform_Call := + Make_Simple_Return_Statement (Loc, + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of (Subp_Name, Loc), + Parameter_Associations => Actuals)); + end if; - Null_Statements := New_List ( + Formal := First (Parameter_Specifications (Subp_Decl_Spec)); + pragma Assert (Present (Formal)); + loop + Next (Formal); + exit when No (Formal); + Append_To (Actuals, + New_Occurrence_Of (Defining_Identifier (Formal), Loc)); + end loop; - Pack_Entity_Into_Stream_Access (Loc, - Stream => Stream_Parameter, - Object => RTE (RE_Get_Local_Partition_Id)), + -- O : aliased subpP; - Pack_Node_Into_Stream_Access (Loc, - Stream => Stream_Parameter, - Object => OK_Convert_To (RTE (RE_Unsigned_64), - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Object_RPC_Receiver, Loc), - Attribute_Name => Name_Address)), - Etyp => RTE (RE_Unsigned_64)), + Append_To (Pvt_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Make_Defining_Identifier (Loc, Name_uO), + Aliased_Present => True, + Object_Definition => New_Occurrence_Of (Proxy_Type, Loc))); - Pack_Node_Into_Stream_Access (Loc, - Stream => Stream_Parameter, - Object => Make_Integer_Literal (Loc, Uint_0), - Etyp => RTE (RE_Unsigned_64))); + -- A : constant System.Address := O'Address; - Statements := New_List ( - Make_Implicit_If_Statement (RACW_Type, - Condition => - Make_Op_Eq (Loc, - Left_Opnd => Object, - Right_Opnd => Make_Null (Loc)), - Then_Statements => Null_Statements, - Elsif_Parts => New_List ( - Make_Elsif_Part (Loc, - Condition => - Make_Op_Eq (Loc, - Left_Opnd => - Make_Attribute_Reference (Loc, - Prefix => Object, - Attribute_Name => Name_Tag), - Right_Opnd => - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Stub_Type, Loc), - Attribute_Name => Name_Tag)), - Then_Statements => Remote_Statements)), - Else_Statements => Local_Statements)); - - Build_Stream_Procedure - (Loc, RACW_Type, Body_Node, - Make_Defining_Identifier (Loc, Procedure_Name), - Statements, Outp => False); - - Proc_Decl := Make_Subprogram_Declaration (Loc, - Copy_Specification (Loc, Specification (Body_Node))); - - Attr_Decl := - Make_Attribute_Definition_Clause (Loc, - Name => New_Occurrence_Of (RACW_Type, Loc), - Chars => Name_Write, + Append_To (Pvt_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Chars (Proxy_Object_Addr)), + Constant_Present => True, + Object_Definition => New_Occurrence_Of (RTE (RE_Address), Loc), Expression => - New_Occurrence_Of ( - Defining_Unit_Name (Specification (Proc_Decl)), Loc)); - - Insert_After (Declaration_Node (RACW_Type), Proc_Decl); - Insert_After (Proc_Decl, Attr_Decl); - Append_To (Declarations, Body_Node); - end Add_RACW_Write_Attribute; + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of ( + Defining_Identifier (Last (Pvt_Decls)), Loc), + Attribute_Name => Name_Address))); - ------------------------------ - -- Add_RAS_Access_Attribute -- - ------------------------------ + Append_To (Decls, + Make_Package_Declaration (Loc, + Specification => Make_Package_Specification (Loc, + Defining_Unit_Name => Pkg_Name, + Visible_Declarations => Vis_Decls, + Private_Declarations => Pvt_Decls, + End_Label => Empty))); + Analyze (Last (Decls)); - procedure Add_RAS_Access_Attribute (N : in Node_Id) is - Ras_Type : constant Entity_Id := Defining_Identifier (N); - Fat_Type : constant Entity_Id := Equivalent_Type (Ras_Type); - -- Ras_Type is the access to subprogram type while Fat_Type points to - -- the record type corresponding to a remote access to subprogram type. - - Proc_Decls : constant List_Id := New_List; - Proc_Statements : constant List_Id := New_List; - - Proc_Spec : Node_Id; - Proc : Node_Id; - Local_Addr : Entity_Id; - Package_Name : Entity_Id; - Subp_Id : Entity_Id; - Asynch_P : Entity_Id; - Origin : Entity_Id; - Return_Value : Entity_Id; - - All_Calls_Remote : Entity_Id; - -- True if an All_Calls_Remote pragma applies to the RCI unit - -- that contains the subprogram (currently unused, all RAS - -- dereferences are handled through the PCS). + Append_To (Decls, + Make_Package_Body (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, Chars (Pkg_Name)), + Declarations => New_List ( + Make_Subprogram_Body (Loc, + Specification => Subp_Body_Spec, + Declarations => New_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List (Perform_Call)))))); + Analyze (Last (Decls)); + end Add_RAS_Proxy_And_Analyze; - Loc : constant Source_Ptr := Sloc (N); + ----------------------- + -- Add_RAST_Features -- + ----------------------- - function Set_Field - (Field_Name : Name_Id; - Value : Node_Id) return Node_Id; - -- Construct an assignment that sets the named component in the - -- returned record + procedure Add_RAST_Features (Vis_Decl : Node_Id) is + RAS_Type : constant Entity_Id := + Equivalent_Type (Defining_Identifier (Vis_Decl)); + begin + pragma Assert (No (TSS (RAS_Type, TSS_RAS_Access))); + Add_RAS_Dereference_TSS (Vis_Decl); + Specific_Add_RAST_Features (Vis_Decl, RAS_Type); + end Add_RAST_Features; - --------------- - -- Set_Field -- - --------------- + ------------------- + -- Add_Stub_Type -- + ------------------- - function Set_Field - (Field_Name : Name_Id; - Value : Node_Id) return Node_Id - is - begin - return - Make_Assignment_Statement (Loc, - Name => - Make_Selected_Component (Loc, - Prefix => New_Occurrence_Of (Return_Value, Loc), - Selector_Name => Make_Identifier (Loc, Field_Name)), - Expression => Value); - end Set_Field; + procedure Add_Stub_Type + (Designated_Type : Entity_Id; + RACW_Type : Entity_Id; + Decls : List_Id; + Stub_Type : out Entity_Id; + Stub_Type_Access : out Entity_Id; + RPC_Receiver_Decl : out Node_Id; + Body_Decls : out List_Id; + Existing : out Boolean) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); - -- Start of processing for Add_RAS_Access_Attribute + Stub_Elements : constant Stub_Structure := + Stubs_Table.Get (Designated_Type); + Stub_Type_Decl : Node_Id; + Stub_Type_Access_Decl : Node_Id; begin - Local_Addr := Make_Defining_Identifier (Loc, New_Internal_Name ('L')); - Package_Name := Make_Defining_Identifier (Loc, New_Internal_Name ('P')); - Subp_Id := Make_Defining_Identifier (Loc, New_Internal_Name ('N')); - Asynch_P := Make_Defining_Identifier (Loc, New_Internal_Name ('B')); - Origin := Make_Defining_Identifier (Loc, New_Internal_Name ('P')); - Return_Value := Make_Defining_Identifier (Loc, New_Internal_Name ('R')); - All_Calls_Remote := - Make_Defining_Identifier (Loc, New_Internal_Name ('A')); - - -- Create the object which will be returned of type Fat_Type + if Stub_Elements /= Empty_Stub_Structure then + Stub_Type := Stub_Elements.Stub_Type; + Stub_Type_Access := Stub_Elements.Stub_Type_Access; + RPC_Receiver_Decl := Stub_Elements.RPC_Receiver_Decl; + Body_Decls := Stub_Elements.Body_Decls; + Existing := True; + return; + end if; - Append_List_To (Proc_Decls, New_List ( + Existing := False; + Stub_Type := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('S')); + Set_Ekind (Stub_Type, E_Record_Type); + Set_Is_RACW_Stub_Type (Stub_Type); + Stub_Type_Access := + Make_Defining_Identifier (Loc, + Chars => New_External_Name + (Related_Id => Chars (Stub_Type), Suffix => 'A')); - Make_Object_Declaration (Loc, - Defining_Identifier => Origin, - Constant_Present => True, - Object_Definition => - New_Occurrence_Of (RTE (RE_Partition_ID), Loc), - Expression => - Make_Function_Call (Loc, - Name => - New_Occurrence_Of (RTE (RE_Get_Active_Partition_Id), Loc), - Parameter_Associations => New_List ( - New_Occurrence_Of (Package_Name, Loc)))), + Specific_Build_Stub_Type + (RACW_Type, Stub_Type, + Stub_Type_Decl, RPC_Receiver_Decl); - Make_Object_Declaration (Loc, - Defining_Identifier => Return_Value, - Object_Definition => - New_Occurrence_Of (Fat_Type, Loc)))); - - -- Initialize the fields of the record type with the appropriate data - - Append_List_To (Proc_Statements, New_List ( - Make_Implicit_If_Statement (N, - Condition => - Make_And_Then (Loc, - Left_Opnd => - Make_Op_Not (Loc, - New_Occurrence_Of (All_Calls_Remote, Loc)), - Right_Opnd => - Make_Op_Eq (Loc, - Left_Opnd => - New_Occurrence_Of (Origin, Loc), - Right_Opnd => - Make_Function_Call (Loc, - New_Occurrence_Of ( - RTE (RE_Get_Local_Partition_Id), Loc)))), + Stub_Type_Access_Decl := + Make_Full_Type_Declaration (Loc, + Defining_Identifier => Stub_Type_Access, + Type_Definition => + Make_Access_To_Object_Definition (Loc, + All_Present => True, + Subtype_Indication => New_Occurrence_Of (Stub_Type, Loc))); - Then_Statements => New_List ( - Set_Field (Name_Ras, - OK_Convert_To (RTE (RE_Unsigned_64), - New_Occurrence_Of (Local_Addr, Loc)))), + Append_To (Decls, Stub_Type_Decl); + Analyze (Last (Decls)); + Append_To (Decls, Stub_Type_Access_Decl); + Analyze (Last (Decls)); - Else_Statements => New_List ( - Set_Field (Name_Ras, - Make_Integer_Literal (Loc, Uint_0)))), + -- This is in no way a type derivation, but we fake it to make sure that + -- the dispatching table gets built with the corresponding primitive + -- operations at the right place. - Set_Field (Name_Origin, - Unchecked_Convert_To (Standard_Integer, - New_Occurrence_Of (Origin, Loc))), + Derive_Subprograms (Parent_Type => Designated_Type, + Derived_Type => Stub_Type); - Set_Field (Name_Receiver, - Make_Function_Call (Loc, - Name => - New_Occurrence_Of (RTE (RE_Get_RCI_Package_Receiver), Loc), - Parameter_Associations => New_List ( - New_Occurrence_Of (Package_Name, Loc)))), + if Present (RPC_Receiver_Decl) then + Append_To (Decls, RPC_Receiver_Decl); + else + RPC_Receiver_Decl := Last (Decls); + end if; - Set_Field (Name_Subp_Id, - New_Occurrence_Of (Subp_Id, Loc)), + Body_Decls := New_List; - Set_Field (Name_Async, - New_Occurrence_Of (Asynch_P, Loc)))); + Stubs_Table.Set (Designated_Type, + (Stub_Type => Stub_Type, + Stub_Type_Access => Stub_Type_Access, + RPC_Receiver_Decl => RPC_Receiver_Decl, + Body_Decls => Body_Decls, + RACW_Type => RACW_Type)); + end Add_Stub_Type; - -- Return the newly created value + ------------------------ + -- Append_RACW_Bodies -- + ------------------------ - Append_To (Proc_Statements, - Make_Return_Statement (Loc, - Expression => - New_Occurrence_Of (Return_Value, Loc))); + procedure Append_RACW_Bodies (Decls : List_Id; Spec_Id : Entity_Id) is + E : Entity_Id; + begin + E := First_Entity (Spec_Id); + while Present (E) loop + if Is_Remote_Access_To_Class_Wide_Type (E) then + Append_List_To (Decls, Get_And_Reset_RACW_Bodies (E)); + end if; - Proc := - Make_Defining_Identifier (Loc, - Chars => Make_TSS_Name (Ras_Type, TSS_RAS_Access)); + Next_Entity (E); + end loop; + end Append_RACW_Bodies; - Proc_Spec := - Make_Function_Specification (Loc, - Defining_Unit_Name => Proc, - Parameter_Specifications => New_List ( - Make_Parameter_Specification (Loc, - Defining_Identifier => Local_Addr, - Parameter_Type => - New_Occurrence_Of (RTE (RE_Address), Loc)), + ---------------------------------- + -- Assign_Subprogram_Identifier -- + ---------------------------------- - Make_Parameter_Specification (Loc, - Defining_Identifier => Package_Name, - Parameter_Type => - New_Occurrence_Of (Standard_String, Loc)), + procedure Assign_Subprogram_Identifier + (Def : Entity_Id; + Spn : Int; + Id : out String_Id) + is + N : constant Name_Id := Chars (Def); - Make_Parameter_Specification (Loc, - Defining_Identifier => Subp_Id, - Parameter_Type => - New_Occurrence_Of (Standard_Natural, Loc)), + Overload_Order : constant Int := + Overload_Counter_Table.Get (N) + 1; - Make_Parameter_Specification (Loc, - Defining_Identifier => Asynch_P, - Parameter_Type => - New_Occurrence_Of (Standard_Boolean, Loc)), + begin + Overload_Counter_Table.Set (N, Overload_Order); - Make_Parameter_Specification (Loc, - Defining_Identifier => All_Calls_Remote, - Parameter_Type => - New_Occurrence_Of (Standard_Boolean, Loc))), + Get_Name_String (N); - Subtype_Mark => - New_Occurrence_Of (Fat_Type, Loc)); + -- Homonym handling: as in Exp_Dbug, but much simpler, + -- because the only entities for which we have to generate + -- names here need only to be disambiguated within their + -- own scope. - -- Set the kind and return type of the function to prevent ambiguities - -- between Ras_Type and Fat_Type in subsequent analysis. + if Overload_Order > 1 then + Name_Buffer (Name_Len + 1 .. Name_Len + 2) := "__"; + Name_Len := Name_Len + 2; + Add_Nat_To_Name_Buffer (Overload_Order); + end if; - Set_Ekind (Proc, E_Function); - Set_Etype (Proc, New_Occurrence_Of (Fat_Type, Loc)); + Id := String_From_Name_Buffer; + Subprogram_Identifier_Table.Set (Def, + Subprogram_Identifiers'(Str_Identifier => Id, Int_Identifier => Spn)); + end Assign_Subprogram_Identifier; + + ------------------------------------- + -- Build_Actual_Object_Declaration -- + ------------------------------------- + + procedure Build_Actual_Object_Declaration + (Object : Entity_Id; + Etyp : Entity_Id; + Variable : Boolean; + Expr : Node_Id; + Decls : List_Id) + is + Loc : constant Source_Ptr := Sloc (Object); + begin + -- Declare a temporary object for the actual, possibly initialized with + -- a 'Input/From_Any call. - Discard_Node ( - Make_Subprogram_Body (Loc, - Specification => Proc_Spec, - Declarations => Proc_Decls, - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, - Statements => Proc_Statements))); + -- Complication arises in the case of limited types, for which such a + -- declaration is illegal in Ada 95. In that case, we first generate a + -- renaming declaration of the 'Input call, and then if needed we + -- generate an overlaid non-constant view. - Set_TSS (Fat_Type, Proc); + if Ada_Version <= Ada_95 + and then Is_Limited_Type (Etyp) + and then Present (Expr) + then - end Add_RAS_Access_Attribute; + -- Object : Etyp renames - ----------------------------------- - -- Add_RAS_Dereference_Attribute -- - ----------------------------------- + Append_To (Decls, + Make_Object_Renaming_Declaration (Loc, + Defining_Identifier => Object, + Subtype_Mark => New_Occurrence_Of (Etyp, Loc), + Name => Expr)); - procedure Add_RAS_Dereference_Attribute (N : in Node_Id) is - Loc : constant Source_Ptr := Sloc (N); + if Variable then - Type_Def : constant Node_Id := Type_Definition (N); + -- The name defined by the renaming declaration denotes a + -- constant view; create a non-constant object at the same address + -- to be used as the actual. - Ras_Type : constant Entity_Id := Defining_Identifier (N); + declare + Constant_Object : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('P')); + begin + Set_Defining_Identifier + (Last (Decls), Constant_Object); - Fat_Type : constant Entity_Id := Equivalent_Type (Ras_Type); + -- We have an unconstrained Etyp: build the actual constrained + -- subtype for the value we just read from the stream. - Proc_Decls : constant List_Id := New_List; - Proc_Statements : constant List_Id := New_List; + -- subtype S is ; - Inner_Decls : constant List_Id := New_List; - Inner_Statements : constant List_Id := New_List; + Append_To (Decls, + Build_Actual_Subtype (Etyp, + New_Occurrence_Of (Constant_Object, Loc))); - Direct_Statements : constant List_Id := New_List; + -- Object : S; - Proc : Node_Id; - Proc_Spec : Node_Id; - Param_Specs : constant List_Id := New_List; - Param_Assoc : constant List_Id := New_List; + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Object, + Object_Definition => + New_Occurrence_Of + (Defining_Identifier (Last (Decls)), Loc))); + Set_Ekind (Object, E_Variable); - Pointer : Node_Id; + -- Suppress default initialization: + -- pragma Import (Ada, Object); - Converted_Ras : Node_Id; - Target_Partition : Node_Id; - RPC_Receiver : Node_Id; - Subprogram_Id : Node_Id; - Asynchronous : Node_Id; + Append_To (Decls, + Make_Pragma (Loc, + Chars => Name_Import, + Pragma_Argument_Associations => New_List ( + Make_Pragma_Argument_Association (Loc, + Chars => Name_Convention, + Expression => Make_Identifier (Loc, Name_Ada)), + Make_Pragma_Argument_Association (Loc, + Chars => Name_Entity, + Expression => New_Occurrence_Of (Object, Loc))))); + + -- for Object'Address use Constant_Object'Address; - Is_Function : constant Boolean := - Nkind (Type_Def) = N_Access_Function_Definition; + Append_To (Decls, + Make_Attribute_Definition_Clause (Loc, + Name => New_Occurrence_Of (Object, Loc), + Chars => Name_Address, + Expression => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Constant_Object, Loc), + Attribute_Name => Name_Address))); + end; + end if; - Spec : constant Node_Id := Type_Def; + else - Current_Parameter : Node_Id; + -- General case of a regular object declaration. Object is flagged + -- constant unless it has mode out or in out, to allow the backend + -- to optimize where possible. - begin - -- The way to do it is test if the Ras field is non-null and then if - -- the Origin field is equal to the current partition ID (which is in - -- fact Current_Package'Partition_ID). If this is the case, then it - -- is safe to dereference the Ras field directly rather than - -- performing a remote call. + -- Object : [constant] Etyp [:= ]; - Pointer := - Make_Defining_Identifier (Loc, New_Internal_Name ('P')); + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Object, + Constant_Present => Present (Expr) and then not Variable, + Object_Definition => New_Occurrence_Of (Etyp, Loc), + Expression => Expr)); + + if Constant_Present (Last (Decls)) then + Set_Ekind (Object, E_Constant); + else + Set_Ekind (Object, E_Variable); + end if; + end if; + end Build_Actual_Object_Declaration; + + ------------------------------ + -- Build_Get_Unique_RP_Call -- + ------------------------------ + + function Build_Get_Unique_RP_Call + (Loc : Source_Ptr; + Pointer : Entity_Id; + Stub_Type : Entity_Id) return List_Id + is + begin + return New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_Unique_Remote_Pointer), Loc), + Parameter_Associations => New_List ( + Unchecked_Convert_To (RTE (RE_RACW_Stub_Type_Access), + New_Occurrence_Of (Pointer, Loc)))), + + Make_Assignment_Statement (Loc, + Name => + Make_Selected_Component (Loc, + Prefix => New_Occurrence_Of (Pointer, Loc), + Selector_Name => + New_Occurrence_Of (First_Tag_Component + (Designated_Type (Etype (Pointer))), Loc)), + Expression => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Stub_Type, Loc), + Attribute_Name => Name_Tag))); + + -- Note: The assignment to Pointer._Tag is safe here because + -- we carefully ensured that Stub_Type has exactly the same layout + -- as System.Partition_Interface.RACW_Stub_Type. + + end Build_Get_Unique_RP_Call; + + ----------------------------------- + -- Build_Ordered_Parameters_List -- + ----------------------------------- + + function Build_Ordered_Parameters_List (Spec : Node_Id) return List_Id is + Constrained_List : List_Id; + Unconstrained_List : List_Id; + Current_Parameter : Node_Id; + Ptyp : Node_Id; + + First_Parameter : Node_Id; + For_RAS : Boolean := False; + + begin + if No (Parameter_Specifications (Spec)) then + return New_List; + end if; + + Constrained_List := New_List; + Unconstrained_List := New_List; + First_Parameter := First (Parameter_Specifications (Spec)); + + if Nkind (Parameter_Type (First_Parameter)) = N_Access_Definition + and then Chars (Defining_Identifier (First_Parameter)) = Name_uS + then + For_RAS := True; + end if; + + -- Loop through the parameters and add them to the right list. Note that + -- we treat a parameter of a null-excluding access type as unconstrained + -- because we can't declare an object of such a type with default + -- initialization. + + Current_Parameter := First_Parameter; + while Present (Current_Parameter) loop + Ptyp := Parameter_Type (Current_Parameter); + + if (Nkind (Ptyp) = N_Access_Definition + or else not Transmit_As_Unconstrained (Etype (Ptyp))) + and then not (For_RAS and then Current_Parameter = First_Parameter) + then + Append_To (Constrained_List, New_Copy (Current_Parameter)); + else + Append_To (Unconstrained_List, New_Copy (Current_Parameter)); + end if; + + Next (Current_Parameter); + end loop; + + -- Unconstrained parameters are returned first + + Append_List_To (Unconstrained_List, Constrained_List); + + return Unconstrained_List; + end Build_Ordered_Parameters_List; + + ---------------------------------- + -- Build_Passive_Partition_Stub -- + ---------------------------------- + + procedure Build_Passive_Partition_Stub (U : Node_Id) is + Pkg_Spec : Node_Id; + Pkg_Name : String_Id; + L : List_Id; + Reg : Node_Id; + Loc : constant Source_Ptr := Sloc (U); + + begin + -- Verify that the implementation supports distribution, by accessing + -- a type defined in the proper version of system.rpc + + declare + Dist_OK : Entity_Id; + pragma Warnings (Off, Dist_OK); + begin + Dist_OK := RTE (RE_Params_Stream_Type); + end; + + -- Use body if present, spec otherwise + + if Nkind (U) = N_Package_Declaration then + Pkg_Spec := Specification (U); + L := Visible_Declarations (Pkg_Spec); + else + Pkg_Spec := Parent (Corresponding_Spec (U)); + L := Declarations (U); + end if; + + Get_Library_Unit_Name_String (Pkg_Spec); + Pkg_Name := String_From_Name_Buffer; + Reg := + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Register_Passive_Package), Loc), + Parameter_Associations => New_List ( + Make_String_Literal (Loc, Pkg_Name), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Defining_Entity (Pkg_Spec), Loc), + Attribute_Name => Name_Version))); + Append_To (L, Reg); + Analyze (Reg); + end Build_Passive_Partition_Stub; + + -------------------------------------- + -- Build_RPC_Receiver_Specification -- + -------------------------------------- + + function Build_RPC_Receiver_Specification + (RPC_Receiver : Entity_Id; + Request_Parameter : Entity_Id) return Node_Id + is + Loc : constant Source_Ptr := Sloc (RPC_Receiver); + begin + return + Make_Procedure_Specification (Loc, + Defining_Unit_Name => RPC_Receiver, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Request_Parameter, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Request_Access), Loc)))); + end Build_RPC_Receiver_Specification; + + ---------------------------------------- + -- Build_Remote_Subprogram_Proxy_Type -- + ---------------------------------------- + + function Build_Remote_Subprogram_Proxy_Type + (Loc : Source_Ptr; + ACR_Expression : Node_Id) return Node_Id + is + begin + return + Make_Record_Definition (Loc, + Tagged_Present => True, + Limited_Present => True, + Component_List => + Make_Component_List (Loc, + + Component_Items => New_List ( + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Name_All_Calls_Remote), + Component_Definition => + Make_Component_Definition (Loc, + Subtype_Indication => + New_Occurrence_Of (Standard_Boolean, Loc)), + Expression => + ACR_Expression), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Name_Receiver), + Component_Definition => + Make_Component_Definition (Loc, + Subtype_Indication => + New_Occurrence_Of (RTE (RE_Address), Loc)), + Expression => + New_Occurrence_Of (RTE (RE_Null_Address), Loc)), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Name_Subp_Id), + Component_Definition => + Make_Component_Definition (Loc, + Subtype_Indication => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc)))))); + end Build_Remote_Subprogram_Proxy_Type; + + -------------------- + -- Build_Stub_Tag -- + -------------------- + + function Build_Stub_Tag + (Loc : Source_Ptr; + RACW_Type : Entity_Id) return Node_Id + is + Stub_Type : constant Entity_Id := Corresponding_Stub_Type (RACW_Type); + begin + return + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Stub_Type, Loc), + Attribute_Name => Name_Tag); + end Build_Stub_Tag; + + ------------------------------------ + -- Build_Subprogram_Calling_Stubs -- + ------------------------------------ + + function Build_Subprogram_Calling_Stubs + (Vis_Decl : Node_Id; + Subp_Id : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Locator : Entity_Id := Empty; + New_Name : Name_Id := No_Name) return Node_Id + is + Loc : constant Source_Ptr := Sloc (Vis_Decl); + + Decls : constant List_Id := New_List; + Statements : constant List_Id := New_List; + + Subp_Spec : Node_Id; + -- The specification of the body + + Controlling_Parameter : Entity_Id := Empty; + + Asynchronous_Expr : Node_Id := Empty; + + RCI_Locator : Entity_Id; + + Spec_To_Use : Node_Id; + + procedure Insert_Partition_Check (Parameter : Node_Id); + -- Check that the parameter has been elaborated on the same partition + -- than the controlling parameter (E.4(19)). + + ---------------------------- + -- Insert_Partition_Check -- + ---------------------------- + + procedure Insert_Partition_Check (Parameter : Node_Id) is + Parameter_Entity : constant Entity_Id := + Defining_Identifier (Parameter); + begin + -- The expression that will be built is of the form: + + -- if not Same_Partition (Parameter, Controlling_Parameter) then + -- raise Constraint_Error; + -- end if; + + -- We do not check that Parameter is in Stub_Type since such a check + -- has been inserted at the point of call already (a tag check since + -- we have multiple controlling operands). + + Append_To (Decls, + Make_Raise_Constraint_Error (Loc, + Condition => + Make_Op_Not (Loc, + Right_Opnd => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Same_Partition), Loc), + Parameter_Associations => + New_List ( + Unchecked_Convert_To (RTE (RE_RACW_Stub_Type_Access), + New_Occurrence_Of (Parameter_Entity, Loc)), + Unchecked_Convert_To (RTE (RE_RACW_Stub_Type_Access), + New_Occurrence_Of (Controlling_Parameter, Loc))))), + Reason => CE_Partition_Check_Failed)); + end Insert_Partition_Check; + + -- Start of processing for Build_Subprogram_Calling_Stubs + + begin + Subp_Spec := Copy_Specification (Loc, + Spec => Specification (Vis_Decl), + New_Name => New_Name); + + if Locator = Empty then + RCI_Locator := RCI_Cache; + Spec_To_Use := Specification (Vis_Decl); + else + RCI_Locator := Locator; + Spec_To_Use := Subp_Spec; + end if; + + -- Find a controlling argument if we have a stub type. Also check + -- if this subprogram can be made asynchronous. + + if Present (Stub_Type) + and then Present (Parameter_Specifications (Spec_To_Use)) + then + declare + Current_Parameter : Node_Id := + First (Parameter_Specifications + (Spec_To_Use)); + begin + while Present (Current_Parameter) loop + if + Is_RACW_Controlling_Formal (Current_Parameter, Stub_Type) + then + if Controlling_Parameter = Empty then + Controlling_Parameter := + Defining_Identifier (Current_Parameter); + else + Insert_Partition_Check (Current_Parameter); + end if; + end if; + + Next (Current_Parameter); + end loop; + end; + end if; + + pragma Assert (No (Stub_Type) or else Present (Controlling_Parameter)); + + if Dynamically_Asynchronous then + Asynchronous_Expr := Make_Selected_Component (Loc, + Prefix => Controlling_Parameter, + Selector_Name => Name_Asynchronous); + end if; + + Specific_Build_General_Calling_Stubs + (Decls => Decls, + Statements => Statements, + Target => Specific_Build_Stub_Target (Loc, + Decls, RCI_Locator, Controlling_Parameter), + Subprogram_Id => Subp_Id, + Asynchronous => Asynchronous_Expr, + Is_Known_Asynchronous => Asynchronous + and then not Dynamically_Asynchronous, + Is_Known_Non_Asynchronous + => not Asynchronous + and then not Dynamically_Asynchronous, + Is_Function => Nkind (Spec_To_Use) = + N_Function_Specification, + Spec => Spec_To_Use, + Stub_Type => Stub_Type, + RACW_Type => RACW_Type, + Nod => Vis_Decl); + + RCI_Calling_Stubs_Table.Set + (Defining_Unit_Name (Specification (Vis_Decl)), + Defining_Unit_Name (Spec_To_Use)); + + return + Make_Subprogram_Body (Loc, + Specification => Subp_Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, Statements)); + end Build_Subprogram_Calling_Stubs; + + ------------------------- + -- Build_Subprogram_Id -- + ------------------------- + + function Build_Subprogram_Id + (Loc : Source_Ptr; + E : Entity_Id) return Node_Id + is + begin + if Get_Subprogram_Ids (E).Str_Identifier = No_String then + declare + Current_Declaration : Node_Id; + Current_Subp : Entity_Id; + Current_Subp_Str : String_Id; + Current_Subp_Number : Int := First_RCI_Subprogram_Id; + + pragma Warnings (Off, Current_Subp_Str); + + begin + -- Build_Subprogram_Id is called outside of the context of + -- generating calling or receiving stubs. Hence we are processing + -- an 'Access attribute_reference for an RCI subprogram, for the + -- purpose of obtaining a RAS value. + + pragma Assert + (Is_Remote_Call_Interface (Scope (E)) + and then + (Nkind (Parent (E)) = N_Procedure_Specification + or else + Nkind (Parent (E)) = N_Function_Specification)); + + Current_Declaration := + First (Visible_Declarations + (Package_Specification_Of_Scope (Scope (E)))); + while Present (Current_Declaration) loop + if Nkind (Current_Declaration) = N_Subprogram_Declaration + and then Comes_From_Source (Current_Declaration) + then + Current_Subp := Defining_Unit_Name (Specification ( + Current_Declaration)); + + Assign_Subprogram_Identifier + (Current_Subp, Current_Subp_Number, Current_Subp_Str); + + Current_Subp_Number := Current_Subp_Number + 1; + end if; + + Next (Current_Declaration); + end loop; + end; + end if; + + case Get_PCS_Name is + when Name_PolyORB_DSA => + return Make_String_Literal (Loc, Get_Subprogram_Id (E)); + when others => + return Make_Integer_Literal (Loc, Get_Subprogram_Id (E)); + end case; + end Build_Subprogram_Id; + + ------------------------ + -- Copy_Specification -- + ------------------------ + + function Copy_Specification + (Loc : Source_Ptr; + Spec : Node_Id; + Ctrl_Type : Entity_Id := Empty; + New_Name : Name_Id := No_Name) return Node_Id + is + Parameters : List_Id := No_List; + + Current_Parameter : Node_Id; + Current_Identifier : Entity_Id; + Current_Type : Node_Id; + + Name_For_New_Spec : Name_Id; + + New_Identifier : Entity_Id; + + -- Comments needed in body below ??? + + begin + if New_Name = No_Name then + pragma Assert (Nkind (Spec) = N_Function_Specification + or else Nkind (Spec) = N_Procedure_Specification); + + Name_For_New_Spec := Chars (Defining_Unit_Name (Spec)); + else + Name_For_New_Spec := New_Name; + end if; + + if Present (Parameter_Specifications (Spec)) then + Parameters := New_List; + Current_Parameter := First (Parameter_Specifications (Spec)); + while Present (Current_Parameter) loop + Current_Identifier := Defining_Identifier (Current_Parameter); + Current_Type := Parameter_Type (Current_Parameter); + + if Nkind (Current_Type) = N_Access_Definition then + if Present (Ctrl_Type) then + pragma Assert (Is_Controlling_Formal (Current_Identifier)); + Current_Type := + Make_Access_Definition (Loc, + Subtype_Mark => New_Occurrence_Of (Ctrl_Type, Loc), + Null_Exclusion_Present => + Null_Exclusion_Present (Current_Type)); + + else + Current_Type := + Make_Access_Definition (Loc, + Subtype_Mark => + New_Copy_Tree (Subtype_Mark (Current_Type)), + Null_Exclusion_Present => + Null_Exclusion_Present (Current_Type)); + end if; + + else + if Present (Ctrl_Type) + and then Is_Controlling_Formal (Current_Identifier) + then + Current_Type := New_Occurrence_Of (Ctrl_Type, Loc); + else + Current_Type := New_Copy_Tree (Current_Type); + end if; + end if; + + New_Identifier := Make_Defining_Identifier (Loc, + Chars (Current_Identifier)); + + Append_To (Parameters, + Make_Parameter_Specification (Loc, + Defining_Identifier => New_Identifier, + Parameter_Type => Current_Type, + In_Present => In_Present (Current_Parameter), + Out_Present => Out_Present (Current_Parameter), + Expression => + New_Copy_Tree (Expression (Current_Parameter)))); + + -- For a regular formal parameter (that needs to be marshalled + -- in the context of remote calls), set the Etype now, because + -- marshalling processing might need it. + + if Is_Entity_Name (Current_Type) then + Set_Etype (New_Identifier, Entity (Current_Type)); + + -- Current_Type is an access definition, special processing + -- (not requiring etype) will occur for marshalling. + + else + null; + end if; + + Next (Current_Parameter); + end loop; + end if; + + case Nkind (Spec) is + + when N_Function_Specification | N_Access_Function_Definition => + return + Make_Function_Specification (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, + Chars => Name_For_New_Spec), + Parameter_Specifications => Parameters, + Result_Definition => + New_Occurrence_Of (Entity (Result_Definition (Spec)), Loc)); + + when N_Procedure_Specification | N_Access_Procedure_Definition => + return + Make_Procedure_Specification (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, + Chars => Name_For_New_Spec), + Parameter_Specifications => Parameters); + + when others => + raise Program_Error; + end case; + end Copy_Specification; + + ----------------------------- + -- Corresponding_Stub_Type -- + ----------------------------- + + function Corresponding_Stub_Type (RACW_Type : Entity_Id) return Entity_Id is + Desig : constant Entity_Id := + Etype (Designated_Type (RACW_Type)); + Stub_Elements : constant Stub_Structure := Stubs_Table.Get (Desig); + begin + return Stub_Elements.Stub_Type; + end Corresponding_Stub_Type; + + --------------------------- + -- Could_Be_Asynchronous -- + --------------------------- + + function Could_Be_Asynchronous (Spec : Node_Id) return Boolean is + Current_Parameter : Node_Id; + + begin + if Present (Parameter_Specifications (Spec)) then + Current_Parameter := First (Parameter_Specifications (Spec)); + while Present (Current_Parameter) loop + if Out_Present (Current_Parameter) then + return False; + end if; + + Next (Current_Parameter); + end loop; + end if; + + return True; + end Could_Be_Asynchronous; + + --------------------------- + -- Declare_Create_NVList -- + --------------------------- + + procedure Declare_Create_NVList + (Loc : Source_Ptr; + NVList : Entity_Id; + Decls : List_Id; + Stmts : List_Id) + is + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => NVList, + Aliased_Present => False, + Object_Definition => + New_Occurrence_Of (RTE (RE_NVList_Ref), Loc))); + + Append_To (Stmts, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_NVList_Create), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (NVList, Loc)))); + end Declare_Create_NVList; + + --------------------------------------------- + -- Expand_All_Calls_Remote_Subprogram_Call -- + --------------------------------------------- + + procedure Expand_All_Calls_Remote_Subprogram_Call (N : Node_Id) is + Called_Subprogram : constant Entity_Id := Entity (Name (N)); + RCI_Package : constant Entity_Id := Scope (Called_Subprogram); + Loc : constant Source_Ptr := Sloc (N); + RCI_Locator : Node_Id; + RCI_Cache : Entity_Id; + Calling_Stubs : Node_Id; + E_Calling_Stubs : Entity_Id; + + begin + E_Calling_Stubs := RCI_Calling_Stubs_Table.Get (Called_Subprogram); + + if E_Calling_Stubs = Empty then + RCI_Cache := RCI_Locator_Table.Get (RCI_Package); + + if RCI_Cache = Empty then + RCI_Locator := + RCI_Package_Locator + (Loc, Specification (Unit_Declaration_Node (RCI_Package))); + Prepend_To (Current_Sem_Unit_Declarations, RCI_Locator); + + -- The RCI_Locator package is inserted at the top level in the + -- current unit, and must appear in the proper scope, so that it + -- is not prematurely removed by the GCC back-end. + + declare + Scop : constant Entity_Id := Cunit_Entity (Current_Sem_Unit); + + begin + if Ekind (Scop) = E_Package_Body then + Push_Scope (Spec_Entity (Scop)); + + elsif Ekind (Scop) = E_Subprogram_Body then + Push_Scope + (Corresponding_Spec (Unit_Declaration_Node (Scop))); + + else + Push_Scope (Scop); + end if; + + Analyze (RCI_Locator); + Pop_Scope; + end; + + RCI_Cache := Defining_Unit_Name (RCI_Locator); + + else + RCI_Locator := Parent (RCI_Cache); + end if; + + Calling_Stubs := Build_Subprogram_Calling_Stubs + (Vis_Decl => Parent (Parent (Called_Subprogram)), + Subp_Id => + Build_Subprogram_Id (Loc, Called_Subprogram), + Asynchronous => Nkind (N) = N_Procedure_Call_Statement + and then + Is_Asynchronous (Called_Subprogram), + Locator => RCI_Cache, + New_Name => New_Internal_Name ('S')); + Insert_After (RCI_Locator, Calling_Stubs); + Analyze (Calling_Stubs); + E_Calling_Stubs := Defining_Unit_Name (Specification (Calling_Stubs)); + end if; + + Rewrite (Name (N), New_Occurrence_Of (E_Calling_Stubs, Loc)); + end Expand_All_Calls_Remote_Subprogram_Call; + + --------------------------------- + -- Expand_Calling_Stubs_Bodies -- + --------------------------------- + + procedure Expand_Calling_Stubs_Bodies (Unit_Node : Node_Id) is + Spec : constant Node_Id := Specification (Unit_Node); + Decls : constant List_Id := Visible_Declarations (Spec); + begin + Push_Scope (Scope_Of_Spec (Spec)); + Add_Calling_Stubs_To_Declarations + (Specification (Unit_Node), Decls); + Pop_Scope; + end Expand_Calling_Stubs_Bodies; + + ----------------------------------- + -- Expand_Receiving_Stubs_Bodies -- + ----------------------------------- + + procedure Expand_Receiving_Stubs_Bodies (Unit_Node : Node_Id) is + Spec : Node_Id; + Decls : List_Id; + Stubs_Decls : List_Id; + Stubs_Stmts : List_Id; + + begin + if Nkind (Unit_Node) = N_Package_Declaration then + Spec := Specification (Unit_Node); + Decls := Private_Declarations (Spec); + + if No (Decls) then + Decls := Visible_Declarations (Spec); + end if; + + Push_Scope (Scope_Of_Spec (Spec)); + Specific_Add_Receiving_Stubs_To_Declarations (Spec, Decls, Decls); + + else + Spec := + Package_Specification_Of_Scope (Corresponding_Spec (Unit_Node)); + Decls := Declarations (Unit_Node); + + Push_Scope (Scope_Of_Spec (Unit_Node)); + Stubs_Decls := New_List; + Stubs_Stmts := New_List; + Specific_Add_Receiving_Stubs_To_Declarations + (Spec, Stubs_Decls, Stubs_Stmts); + + Insert_List_Before (First (Decls), Stubs_Decls); + + declare + HSS_Stmts : constant List_Id := + Statements (Handled_Statement_Sequence (Unit_Node)); + + First_HSS_Stmt : constant Node_Id := First (HSS_Stmts); + + begin + if No (First_HSS_Stmt) then + Append_List_To (HSS_Stmts, Stubs_Stmts); + else + Insert_List_Before (First_HSS_Stmt, Stubs_Stmts); + end if; + end; + end if; + + Pop_Scope; + end Expand_Receiving_Stubs_Bodies; + + -------------------- + -- GARLIC_Support -- + -------------------- + + package body GARLIC_Support is + + -- Local subprograms + + procedure Add_RACW_Read_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Body_Decls : List_Id); + -- Add Read attribute for the RACW type. The declaration and attribute + -- definition clauses are inserted right after the declaration of + -- RACW_Type. If Body_Decls is not No_List, the subprogram body is + -- appended to it (case where the RACW declaration is in the main unit). + + procedure Add_RACW_Write_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver : Node_Id; + Body_Decls : List_Id); + -- Same as above for the Write attribute + + function Stream_Parameter return Node_Id; + function Result return Node_Id; + function Object return Node_Id renames Result; + -- Functions to create occurrences of the formal parameter names of the + -- 'Read and 'Write attributes. + + Loc : Source_Ptr; + -- Shared source location used by Add_{Read,Write}_Read_Attribute and + -- their ancillary subroutines (set on entry by Add_RACW_Features). + + procedure Add_RAS_Access_TSS (N : Node_Id); + -- Add a subprogram body for RAS Access TSS + + ------------------------------------- + -- Add_Obj_RPC_Receiver_Completion -- + ------------------------------------- + + procedure Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure) + is + begin + -- The RPC receiver body should not be the completion of the + -- declaration recorded in the stub structure, because then the + -- occurrences of the formal parameters within the body should refer + -- to the entities from the declaration, not from the completion, to + -- which we do not have easy access. Instead, the RPC receiver body + -- acts as its own declaration, and the RPC receiver declaration is + -- completed by a renaming-as-body. + + Append_To (Decls, + Make_Subprogram_Renaming_Declaration (Loc, + Specification => + Copy_Specification (Loc, + Specification (Stub_Elements.RPC_Receiver_Decl)), + Name => New_Occurrence_Of (RPC_Receiver, Loc))); + end Add_Obj_RPC_Receiver_Completion; + + ----------------------- + -- Add_RACW_Features -- + ----------------------- + + procedure Add_RACW_Features + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Body_Decls : List_Id) + is + RPC_Receiver : Node_Id; + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + + begin + Loc := Sloc (RACW_Type); + + if Is_RAS then + + -- For a RAS, the RPC receiver is that of the RCI unit, not that + -- of the corresponding distributed object type. We retrieve its + -- address from the local proxy object. + + RPC_Receiver := Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To (RTE (RE_RAS_Proxy_Type_Access), Object), + Selector_Name => Make_Identifier (Loc, Name_Receiver)); + + else + RPC_Receiver := Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of ( + Defining_Unit_Name (Specification (RPC_Receiver_Decl)), Loc), + Attribute_Name => Name_Address); + end if; + + Add_RACW_Write_Attribute + (RACW_Type, + Stub_Type, + Stub_Type_Access, + RPC_Receiver, + Body_Decls); + + Add_RACW_Read_Attribute + (RACW_Type, + Stub_Type, + Stub_Type_Access, + Body_Decls); + end Add_RACW_Features; + + ----------------------------- + -- Add_RACW_Read_Attribute -- + ----------------------------- + + procedure Add_RACW_Read_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Body_Decls : List_Id) + is + Proc_Decl : Node_Id; + Attr_Decl : Node_Id; + + Body_Node : Node_Id; + + Statements : constant List_Id := New_List; + Decls : List_Id; + Local_Statements : List_Id; + Remote_Statements : List_Id; + -- Various parts of the procedure + + Pnam : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('R')); + Asynchronous_Flag : constant Entity_Id := + Asynchronous_Flags_Table.Get (RACW_Type); + pragma Assert (Present (Asynchronous_Flag)); + + -- Prepare local identifiers + + Source_Partition : Entity_Id; + Source_Receiver : Entity_Id; + Source_Address : Entity_Id; + Local_Stub : Entity_Id; + Stubbed_Result : Entity_Id; + + -- Start of processing for Add_RACW_Read_Attribute + + begin + Build_Stream_Procedure (Loc, + RACW_Type, Body_Node, Pnam, Statements, Outp => True); + Proc_Decl := Make_Subprogram_Declaration (Loc, + Copy_Specification (Loc, Specification (Body_Node))); + + Attr_Decl := + Make_Attribute_Definition_Clause (Loc, + Name => New_Occurrence_Of (RACW_Type, Loc), + Chars => Name_Read, + Expression => + New_Occurrence_Of ( + Defining_Unit_Name (Specification (Proc_Decl)), Loc)); + + Insert_After (Declaration_Node (RACW_Type), Proc_Decl); + Insert_After (Proc_Decl, Attr_Decl); + + if No (Body_Decls) then + + -- Case of processing an RACW type from another unit than the + -- main one: do not generate a body. + + return; + end if; + + -- Prepare local identifiers + + Source_Partition := + Make_Defining_Identifier (Loc, New_Internal_Name ('P')); + Source_Receiver := + Make_Defining_Identifier (Loc, New_Internal_Name ('S')); + Source_Address := + Make_Defining_Identifier (Loc, New_Internal_Name ('P')); + Local_Stub := + Make_Defining_Identifier (Loc, New_Internal_Name ('L')); + Stubbed_Result := + Make_Defining_Identifier (Loc, New_Internal_Name ('S')); + + -- Generate object declarations + + Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Source_Partition, + Object_Definition => + New_Occurrence_Of (RTE (RE_Partition_ID), Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Source_Receiver, + Object_Definition => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Source_Address, + Object_Definition => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Local_Stub, + Aliased_Present => True, + Object_Definition => New_Occurrence_Of (Stub_Type, Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Stubbed_Result, + Object_Definition => + New_Occurrence_Of (Stub_Type_Access, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Local_Stub, Loc), + Attribute_Name => + Name_Unchecked_Access))); + + -- Read the source Partition_ID and RPC_Receiver from incoming stream + + Append_List_To (Statements, New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Partition_ID), Loc), + Attribute_Name => Name_Read, + Expressions => New_List ( + Stream_Parameter, + New_Occurrence_Of (Source_Partition, Loc))), + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), + Attribute_Name => + Name_Read, + Expressions => New_List ( + Stream_Parameter, + New_Occurrence_Of (Source_Receiver, Loc))), + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), + Attribute_Name => + Name_Read, + Expressions => New_List ( + Stream_Parameter, + New_Occurrence_Of (Source_Address, Loc))))); + + -- Build_Get_Unique_RP_Call needs the type of Stubbed_Result + + Set_Etype (Stubbed_Result, Stub_Type_Access); + + -- If the Address is Null_Address, then return a null object, unless + -- RACW_Type is null-excluding, in which case unconditionally raise + -- CONSTRAINT_ERROR instead. + + declare + Zero_Statements : List_Id; + -- Statements executed when a zero value is received + + begin + if Can_Never_Be_Null (RACW_Type) then + Zero_Statements := New_List ( + Make_Raise_Constraint_Error (Loc, + Reason => CE_Null_Not_Allowed)); + else + Zero_Statements := New_List ( + Make_Assignment_Statement (Loc, + Name => Result, + Expression => Make_Null (Loc)), + Make_Simple_Return_Statement (Loc)); + end if; + + Append_To (Statements, + Make_Implicit_If_Statement (RACW_Type, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => New_Occurrence_Of (Source_Address, Loc), + Right_Opnd => Make_Integer_Literal (Loc, Uint_0)), + Then_Statements => Zero_Statements)); + end; + + -- If the RACW denotes an object created on the current partition, + -- Local_Statements will be executed. The real object will be used. + + Local_Statements := New_List ( + Make_Assignment_Statement (Loc, + Name => Result, + Expression => + Unchecked_Convert_To (RACW_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Source_Address, Loc))))); + + -- If the object is located on another partition, then a stub object + -- will be created with all the information needed to rebuild the + -- real object at the other end. + + Remote_Statements := New_List ( + + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Origin), + Expression => + New_Occurrence_Of (Source_Partition, Loc)), + + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Receiver), + Expression => + New_Occurrence_Of (Source_Receiver, Loc)), + + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Addr), + Expression => + New_Occurrence_Of (Source_Address, Loc))); + + Append_To (Remote_Statements, + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Asynchronous), + Expression => + New_Occurrence_Of (Asynchronous_Flag, Loc))); + + Append_List_To (Remote_Statements, + Build_Get_Unique_RP_Call (Loc, Stubbed_Result, Stub_Type)); + -- ??? Issue with asynchronous calls here: the Asynchronous flag is + -- set on the stub type if, and only if, the RACW type has a pragma + -- Asynchronous. This is incorrect for RACWs that implement RAS + -- types, because in that case the /designated subprogram/ (not the + -- type) might be asynchronous, and that causes the stub to need to + -- be asynchronous too. A solution is to transport a RAS as a struct + -- containing a RACW and an asynchronous flag, and to properly alter + -- the Asynchronous component in the stub type in the RAS's Input + -- TSS. + + Append_To (Remote_Statements, + Make_Assignment_Statement (Loc, + Name => Result, + Expression => Unchecked_Convert_To (RACW_Type, + New_Occurrence_Of (Stubbed_Result, Loc)))); + + -- Distinguish between the local and remote cases, and execute the + -- appropriate piece of code. + + Append_To (Statements, + Make_Implicit_If_Statement (RACW_Type, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Get_Local_Partition_Id), Loc)), + Right_Opnd => New_Occurrence_Of (Source_Partition, Loc)), + Then_Statements => Local_Statements, + Else_Statements => Remote_Statements)); + + Set_Declarations (Body_Node, Decls); + Append_To (Body_Decls, Body_Node); + end Add_RACW_Read_Attribute; + + ------------------------------ + -- Add_RACW_Write_Attribute -- + ------------------------------ + + procedure Add_RACW_Write_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver : Node_Id; + Body_Decls : List_Id) + is + Body_Node : Node_Id; + Proc_Decl : Node_Id; + Attr_Decl : Node_Id; + + Statements : constant List_Id := New_List; + Local_Statements : List_Id; + Remote_Statements : List_Id; + Null_Statements : List_Id; + + Pnam : constant Entity_Id := + Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + + begin + Build_Stream_Procedure + (Loc, RACW_Type, Body_Node, Pnam, Statements, Outp => False); + + Proc_Decl := Make_Subprogram_Declaration (Loc, + Copy_Specification (Loc, Specification (Body_Node))); + + Attr_Decl := + Make_Attribute_Definition_Clause (Loc, + Name => New_Occurrence_Of (RACW_Type, Loc), + Chars => Name_Write, + Expression => + New_Occurrence_Of ( + Defining_Unit_Name (Specification (Proc_Decl)), Loc)); + + Insert_After (Declaration_Node (RACW_Type), Proc_Decl); + Insert_After (Proc_Decl, Attr_Decl); + + if No (Body_Decls) then + return; + end if; + + -- Build the code fragment corresponding to the marshalling of a + -- local object. + + Local_Statements := New_List ( + + Pack_Entity_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => RTE (RE_Get_Local_Partition_Id)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => OK_Convert_To (RTE (RE_Unsigned_64), RPC_Receiver), + Etyp => RTE (RE_Unsigned_64)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => OK_Convert_To (RTE (RE_Unsigned_64), + Make_Attribute_Reference (Loc, + Prefix => + Make_Explicit_Dereference (Loc, + Prefix => Object), + Attribute_Name => Name_Address)), + Etyp => RTE (RE_Unsigned_64))); + + -- Build the code fragment corresponding to the marshalling of + -- a remote object. + + Remote_Statements := New_List ( + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To (Stub_Type_Access, Object), + Selector_Name => Make_Identifier (Loc, Name_Origin)), + Etyp => RTE (RE_Partition_ID)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To (Stub_Type_Access, Object), + Selector_Name => Make_Identifier (Loc, Name_Receiver)), + Etyp => RTE (RE_Unsigned_64)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To (Stub_Type_Access, Object), + Selector_Name => Make_Identifier (Loc, Name_Addr)), + Etyp => RTE (RE_Unsigned_64))); + + -- Build code fragment corresponding to marshalling of a null object + + Null_Statements := New_List ( + + Pack_Entity_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => RTE (RE_Get_Local_Partition_Id)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => OK_Convert_To (RTE (RE_Unsigned_64), RPC_Receiver), + Etyp => RTE (RE_Unsigned_64)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => Make_Integer_Literal (Loc, Uint_0), + Etyp => RTE (RE_Unsigned_64))); + + Append_To (Statements, + Make_Implicit_If_Statement (RACW_Type, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => Object, + Right_Opnd => Make_Null (Loc)), + + Then_Statements => Null_Statements, + + Elsif_Parts => New_List ( + Make_Elsif_Part (Loc, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => + Make_Attribute_Reference (Loc, + Prefix => Object, + Attribute_Name => Name_Tag), + + Right_Opnd => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Stub_Type, Loc), + Attribute_Name => Name_Tag)), + Then_Statements => Remote_Statements)), + Else_Statements => Local_Statements)); + + Append_To (Body_Decls, Body_Node); + end Add_RACW_Write_Attribute; + + ------------------------ + -- Add_RAS_Access_TSS -- + ------------------------ + + procedure Add_RAS_Access_TSS (N : Node_Id) is + Loc : constant Source_Ptr := Sloc (N); + + Ras_Type : constant Entity_Id := Defining_Identifier (N); + Fat_Type : constant Entity_Id := Equivalent_Type (Ras_Type); + -- Ras_Type is the access to subprogram type while Fat_Type is the + -- corresponding record type. + + RACW_Type : constant Entity_Id := + Underlying_RACW_Type (Ras_Type); + Desig : constant Entity_Id := + Etype (Designated_Type (RACW_Type)); + + Stub_Elements : constant Stub_Structure := + Stubs_Table.Get (Desig); + pragma Assert (Stub_Elements /= Empty_Stub_Structure); + + Proc : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Make_TSS_Name (Ras_Type, TSS_RAS_Access)); + + Proc_Spec : Node_Id; + + -- Formal parameters + + Package_Name : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_P); + -- Target package + + Subp_Id : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_S); + -- Target subprogram + + Asynch_P : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_Asynchronous); + -- Is the procedure to which the 'Access applies asynchronous? + + All_Calls_Remote : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_All_Calls_Remote); + -- True if an All_Calls_Remote pragma applies to the RCI unit + -- that contains the subprogram. + + -- Common local variables + + Proc_Decls : List_Id; + Proc_Statements : List_Id; + + Origin : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('P')); + + -- Additional local variables for the local case + + Proxy_Addr : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('P')); + + -- Additional local variables for the remote case + + Local_Stub : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('L')); + + Stub_Ptr : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('S')); + + function Set_Field + (Field_Name : Name_Id; + Value : Node_Id) return Node_Id; + -- Construct an assignment that sets the named component in the + -- returned record + + --------------- + -- Set_Field -- + --------------- + + function Set_Field + (Field_Name : Name_Id; + Value : Node_Id) return Node_Id + is + begin + return + Make_Assignment_Statement (Loc, + Name => + Make_Selected_Component (Loc, + Prefix => Stub_Ptr, + Selector_Name => Field_Name), + Expression => Value); + end Set_Field; + + -- Start of processing for Add_RAS_Access_TSS + + begin + Proc_Decls := New_List ( + + -- Common declarations + + Make_Object_Declaration (Loc, + Defining_Identifier => Origin, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Partition_ID), Loc), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_Active_Partition_Id), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Package_Name, Loc)))), + + -- Declaration use only in the local case: proxy address + + Make_Object_Declaration (Loc, + Defining_Identifier => Proxy_Addr, + Object_Definition => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc)), + + -- Declarations used only in the remote case: stub object and + -- stub pointer. + + Make_Object_Declaration (Loc, + Defining_Identifier => Local_Stub, + Aliased_Present => True, + Object_Definition => + New_Occurrence_Of (Stub_Elements.Stub_Type, Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => + Stub_Ptr, + Object_Definition => + New_Occurrence_Of (Stub_Elements.Stub_Type_Access, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Local_Stub, Loc), + Attribute_Name => Name_Unchecked_Access))); + + Set_Etype (Stub_Ptr, Stub_Elements.Stub_Type_Access); + + -- Build_Get_Unique_RP_Call needs above information + + -- Note: Here we assume that the Fat_Type is a record + -- containing just a pointer to a proxy or stub object. + + Proc_Statements := New_List ( + + -- Generate: + + -- Get_RAS_Info (Pkg, Subp, PA); + -- if Origin = Local_Partition_Id + -- and then not All_Calls_Remote + -- then + -- return Fat_Type!(PA); + -- end if; + + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Get_RAS_Info), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Package_Name, Loc), + New_Occurrence_Of (Subp_Id, Loc), + New_Occurrence_Of (Proxy_Addr, Loc))), + + Make_Implicit_If_Statement (N, + Condition => + Make_And_Then (Loc, + Left_Opnd => + Make_Op_Eq (Loc, + Left_Opnd => + New_Occurrence_Of (Origin, Loc), + Right_Opnd => + Make_Function_Call (Loc, + New_Occurrence_Of ( + RTE (RE_Get_Local_Partition_Id), Loc))), + + Right_Opnd => + Make_Op_Not (Loc, + New_Occurrence_Of (All_Calls_Remote, Loc))), + + Then_Statements => New_List ( + Make_Simple_Return_Statement (Loc, + Unchecked_Convert_To (Fat_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Proxy_Addr, Loc)))))), + + Set_Field (Name_Origin, + New_Occurrence_Of (Origin, Loc)), + + Set_Field (Name_Receiver, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_RCI_Package_Receiver), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Package_Name, Loc)))), + + Set_Field (Name_Addr, New_Occurrence_Of (Proxy_Addr, Loc)), + + -- E.4.1(9) A remote call is asynchronous if it is a call to + -- a procedure or a call through a value of an access-to-procedure + -- type to which a pragma Asynchronous applies. + + -- Asynch_P is true when the procedure is asynchronous; + -- Asynch_T is true when the type is asynchronous. + + Set_Field (Name_Asynchronous, + Make_Or_Else (Loc, + New_Occurrence_Of (Asynch_P, Loc), + New_Occurrence_Of (Boolean_Literals ( + Is_Asynchronous (Ras_Type)), Loc)))); + + Append_List_To (Proc_Statements, + Build_Get_Unique_RP_Call + (Loc, Stub_Ptr, Stub_Elements.Stub_Type)); + + -- Return the newly created value + + Append_To (Proc_Statements, + Make_Simple_Return_Statement (Loc, + Expression => + Unchecked_Convert_To (Fat_Type, + New_Occurrence_Of (Stub_Ptr, Loc)))); + + Proc_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Proc, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Package_Name, + Parameter_Type => + New_Occurrence_Of (Standard_String, Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => Subp_Id, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => Asynch_P, + Parameter_Type => + New_Occurrence_Of (Standard_Boolean, Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => All_Calls_Remote, + Parameter_Type => + New_Occurrence_Of (Standard_Boolean, Loc))), + + Result_Definition => + New_Occurrence_Of (Fat_Type, Loc)); + + -- Set the kind and return type of the function to prevent + -- ambiguities between Ras_Type and Fat_Type in subsequent analysis. + + Set_Ekind (Proc, E_Function); + Set_Etype (Proc, Fat_Type); + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Proc_Spec, + Declarations => Proc_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Proc_Statements))); + + Set_TSS (Fat_Type, Proc); + end Add_RAS_Access_TSS; + + ----------------------- + -- Add_RAST_Features -- + ----------------------- + + procedure Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id) + is + pragma Warnings (Off); + pragma Unreferenced (RAS_Type); + pragma Warnings (On); + begin + Add_RAS_Access_TSS (Vis_Decl); + end Add_RAST_Features; + + ----------------------------------------- + -- Add_Receiving_Stubs_To_Declarations -- + ----------------------------------------- + + procedure Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id; + Stmts : List_Id) + is + Loc : constant Source_Ptr := Sloc (Pkg_Spec); + + Request_Parameter : Node_Id; + + Pkg_RPC_Receiver : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('H')); + Pkg_RPC_Receiver_Statements : List_Id; + Pkg_RPC_Receiver_Cases : constant List_Id := New_List; + Pkg_RPC_Receiver_Body : Node_Id; + -- A Pkg_RPC_Receiver is built to decode the request + + Lookup_RAS_Info : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('R')); + -- A remote subprogram is created to allow peers to look up + -- RAS information using subprogram ids. + + Subp_Id : Entity_Id; + Subp_Index : Entity_Id; + -- Subprogram_Id as read from the incoming stream + + Current_Declaration : Node_Id; + Current_Subprogram_Number : Int := First_RCI_Subprogram_Id; + Current_Stubs : Node_Id; + + Subp_Info_Array : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('I')); + + Subp_Info_List : constant List_Id := New_List; + + Register_Pkg_Actuals : constant List_Id := New_List; + + All_Calls_Remote_E : Entity_Id; + Proxy_Object_Addr : Entity_Id; + + procedure Append_Stubs_To + (RPC_Receiver_Cases : List_Id; + Stubs : Node_Id; + Subprogram_Number : Int); + -- Add one case to the specified RPC receiver case list + -- associating Subprogram_Number with the subprogram declared + -- by Declaration, for which we have receiving stubs in Stubs. + + --------------------- + -- Append_Stubs_To -- + --------------------- + + procedure Append_Stubs_To + (RPC_Receiver_Cases : List_Id; + Stubs : Node_Id; + Subprogram_Number : Int) + is + begin + Append_To (RPC_Receiver_Cases, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => + New_List (Make_Integer_Literal (Loc, Subprogram_Number)), + Statements => + New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (Defining_Entity (Stubs), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request_Parameter, Loc)))))); + end Append_Stubs_To; + + -- Start of processing for Add_Receiving_Stubs_To_Declarations + + begin + -- Building receiving stubs consist in several operations: + + -- - a package RPC receiver must be built. This subprogram + -- will get a Subprogram_Id from the incoming stream + -- and will dispatch the call to the right subprogram; + + -- - a receiving stub for each subprogram visible in the package + -- spec. This stub will read all the parameters from the stream, + -- and put the result as well as the exception occurrence in the + -- output stream; + + -- - a dummy package with an empty spec and a body made of an + -- elaboration part, whose job is to register the receiving + -- part of this RCI package on the name server. This is done + -- by calling System.Partition_Interface.Register_Receiving_Stub. + + Build_RPC_Receiver_Body ( + RPC_Receiver => Pkg_RPC_Receiver, + Request => Request_Parameter, + Subp_Id => Subp_Id, + Subp_Index => Subp_Index, + Stmts => Pkg_RPC_Receiver_Statements, + Decl => Pkg_RPC_Receiver_Body); + pragma Assert (Subp_Id = Subp_Index); + + -- A null subp_id denotes a call through a RAS, in which case the + -- next Uint_64 element in the stream is the address of the local + -- proxy object, from which we can retrieve the actual subprogram id. + + Append_To (Pkg_RPC_Receiver_Statements, + Make_Implicit_If_Statement (Pkg_Spec, + Condition => + Make_Op_Eq (Loc, + New_Occurrence_Of (Subp_Id, Loc), + Make_Integer_Literal (Loc, 0)), + + Then_Statements => New_List ( + Make_Assignment_Statement (Loc, + Name => + New_Occurrence_Of (Subp_Id, Loc), + + Expression => + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To (RTE (RE_RAS_Proxy_Type_Access), + OK_Convert_To (RTE (RE_Address), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), + Attribute_Name => + Name_Input, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Params))))), + + Selector_Name => + Make_Identifier (Loc, Name_Subp_Id)))))); + + -- Build a subprogram for RAS information lookups + + Current_Declaration := + Make_Subprogram_Declaration (Loc, + Specification => + Make_Function_Specification (Loc, + Defining_Unit_Name => + Lookup_RAS_Info, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Subp_Id), + In_Present => + True, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc))), + Result_Definition => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc))); + + Append_To (Decls, Current_Declaration); + Analyze (Current_Declaration); + + Current_Stubs := Build_Subprogram_Receiving_Stubs + (Vis_Decl => Current_Declaration, + Asynchronous => False); + Append_To (Decls, Current_Stubs); + Analyze (Current_Stubs); + + Append_Stubs_To (Pkg_RPC_Receiver_Cases, + Stubs => + Current_Stubs, + Subprogram_Number => 1); + + -- For each subprogram, the receiving stub will be built and a + -- case statement will be made on the Subprogram_Id to dispatch + -- to the right subprogram. + + All_Calls_Remote_E := + Boolean_Literals + (Has_All_Calls_Remote (Defining_Entity (Pkg_Spec))); + + Overload_Counter_Table.Reset; + + Current_Declaration := First (Visible_Declarations (Pkg_Spec)); + while Present (Current_Declaration) loop + if Nkind (Current_Declaration) = N_Subprogram_Declaration + and then Comes_From_Source (Current_Declaration) + then + declare + Loc : constant Source_Ptr := Sloc (Current_Declaration); + -- While specifically processing Current_Declaration, use + -- its Sloc as the location of all generated nodes. + + Subp_Def : constant Entity_Id := + Defining_Unit_Name + (Specification (Current_Declaration)); + + Subp_Val : String_Id; + pragma Warnings (Off, Subp_Val); + + begin + -- Build receiving stub + + Current_Stubs := + Build_Subprogram_Receiving_Stubs + (Vis_Decl => Current_Declaration, + Asynchronous => + Nkind (Specification (Current_Declaration)) = + N_Procedure_Specification + and then Is_Asynchronous (Subp_Def)); + + Append_To (Decls, Current_Stubs); + Analyze (Current_Stubs); + + -- Build RAS proxy + + Add_RAS_Proxy_And_Analyze (Decls, + Vis_Decl => Current_Declaration, + All_Calls_Remote_E => All_Calls_Remote_E, + Proxy_Object_Addr => Proxy_Object_Addr); + + -- Compute distribution identifier + + Assign_Subprogram_Identifier + (Subp_Def, + Current_Subprogram_Number, + Subp_Val); + + pragma Assert + (Current_Subprogram_Number = Get_Subprogram_Id (Subp_Def)); + + -- Add subprogram descriptor (RCI_Subp_Info) to the + -- subprograms table for this receiver. The aggregate + -- below must be kept consistent with the declaration + -- of type RCI_Subp_Info in System.Partition_Interface. + + Append_To (Subp_Info_List, + Make_Component_Association (Loc, + Choices => New_List ( + Make_Integer_Literal (Loc, + Current_Subprogram_Number)), + + Expression => + Make_Aggregate (Loc, + Component_Associations => New_List ( + Make_Component_Association (Loc, + Choices => New_List ( + Make_Identifier (Loc, Name_Addr)), + Expression => + New_Occurrence_Of ( + Proxy_Object_Addr, Loc)))))); + + Append_Stubs_To (Pkg_RPC_Receiver_Cases, + Stubs => Current_Stubs, + Subprogram_Number => Current_Subprogram_Number); + end; + + Current_Subprogram_Number := Current_Subprogram_Number + 1; + end if; + + Next (Current_Declaration); + end loop; + + -- If we receive an invalid Subprogram_Id, it is best to do nothing + -- rather than raising an exception since we do not want someone + -- to crash a remote partition by sending invalid subprogram ids. + -- This is consistent with the other parts of the case statement + -- since even in presence of incorrect parameters in the stream, + -- every exception will be caught and (if the subprogram is not an + -- APC) put into the result stream and sent away. + + Append_To (Pkg_RPC_Receiver_Cases, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => New_List (Make_Others_Choice (Loc)), + Statements => New_List (Make_Null_Statement (Loc)))); + + Append_To (Pkg_RPC_Receiver_Statements, + Make_Case_Statement (Loc, + Expression => New_Occurrence_Of (Subp_Id, Loc), + Alternatives => Pkg_RPC_Receiver_Cases)); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Info_Array, + Constant_Present => True, + Aliased_Present => True, + Object_Definition => + Make_Subtype_Indication (Loc, + Subtype_Mark => + New_Occurrence_Of (RTE (RE_RCI_Subp_Info_Array), Loc), + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + New_List ( + Make_Range (Loc, + Low_Bound => Make_Integer_Literal (Loc, + First_RCI_Subprogram_Id), + High_Bound => + Make_Integer_Literal (Loc, + Intval => + First_RCI_Subprogram_Id + + List_Length (Subp_Info_List) - 1))))))); + + -- For a degenerate RCI with no visible subprograms, Subp_Info_List + -- has zero length, and the declaration is for an empty array, in + -- which case no initialization aggregate must be generated. + + if Present (First (Subp_Info_List)) then + Set_Expression (Last (Decls), + Make_Aggregate (Loc, + Component_Associations => Subp_Info_List)); + + -- No initialization provided: remove CONSTANT so that the + -- declaration is not an incomplete deferred constant. + + else + Set_Constant_Present (Last (Decls), False); + end if; + + Analyze (Last (Decls)); + + declare + Subp_Info_Addr : Node_Id; + -- Return statement for Lookup_RAS_Info: address of the subprogram + -- information record for the requested subprogram id. + + begin + if Present (First (Subp_Info_List)) then + Subp_Info_Addr := + Make_Selected_Component (Loc, + Prefix => + Make_Indexed_Component (Loc, + Prefix => New_Occurrence_Of (Subp_Info_Array, Loc), + Expressions => New_List ( + Convert_To (Standard_Integer, + Make_Identifier (Loc, Name_Subp_Id)))), + Selector_Name => Make_Identifier (Loc, Name_Addr)); + + -- Case of no visible subprogram: just raise Constraint_Error, we + -- know for sure we got junk from a remote partition. + + else + Subp_Info_Addr := + Make_Raise_Constraint_Error (Loc, + Reason => CE_Range_Check_Failed); + Set_Etype (Subp_Info_Addr, RTE (RE_Unsigned_64)); + end if; + + Append_To (Decls, + Make_Subprogram_Body (Loc, + Specification => + Copy_Specification (Loc, Parent (Lookup_RAS_Info)), + Declarations => No_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List ( + Make_Simple_Return_Statement (Loc, + Expression => + OK_Convert_To + (RTE (RE_Unsigned_64), Subp_Info_Addr)))))); + end; + + Analyze (Last (Decls)); + + Append_To (Decls, Pkg_RPC_Receiver_Body); + Analyze (Last (Decls)); + + Get_Library_Unit_Name_String (Pkg_Spec); + + -- Name + + Append_To (Register_Pkg_Actuals, + Make_String_Literal (Loc, + Strval => String_From_Name_Buffer)); + + -- Receiver + + Append_To (Register_Pkg_Actuals, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Pkg_RPC_Receiver, Loc), + Attribute_Name => Name_Unrestricted_Access)); + + -- Version + + Append_To (Register_Pkg_Actuals, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Defining_Entity (Pkg_Spec), Loc), + Attribute_Name => Name_Version)); + + -- Subp_Info + + Append_To (Register_Pkg_Actuals, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Subp_Info_Array, Loc), + Attribute_Name => Name_Address)); + + -- Subp_Info_Len + + Append_To (Register_Pkg_Actuals, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Subp_Info_Array, Loc), + Attribute_Name => Name_Length)); + + -- Generate the call + + Append_To (Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Register_Receiving_Stub), Loc), + Parameter_Associations => Register_Pkg_Actuals)); + Analyze (Last (Stmts)); + end Add_Receiving_Stubs_To_Declarations; + + --------------------------------- + -- Build_General_Calling_Stubs -- + --------------------------------- + + procedure Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target_Partition : Entity_Id; + Target_RPC_Receiver : Node_Id; + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id) + is + Loc : constant Source_Ptr := Sloc (Nod); + + Stream_Parameter : Node_Id; + -- Name of the stream used to transmit parameters to the + -- remote package. + + Result_Parameter : Node_Id; + -- Name of the result parameter (in non-APC cases) which get the + -- result of the remote subprogram. + + Exception_Return_Parameter : Node_Id; + -- Name of the parameter which will hold the exception sent by the + -- remote subprogram. + + Current_Parameter : Node_Id; + -- Current parameter being handled + + Ordered_Parameters_List : constant List_Id := + Build_Ordered_Parameters_List (Spec); + + Asynchronous_Statements : List_Id := No_List; + Non_Asynchronous_Statements : List_Id := No_List; + -- Statements specifics to the Asynchronous/Non-Asynchronous cases + + Extra_Formal_Statements : constant List_Id := New_List; + -- List of statements for extra formal parameters. It will appear + -- after the regular statements for writing out parameters. + + pragma Warnings (Off); + pragma Unreferenced (RACW_Type); + -- Used only for the PolyORB case + pragma Warnings (On); + + begin + -- The general form of a calling stub for a given subprogram is: + + -- procedure X (...) is P : constant Partition_ID := + -- RCI_Cache.Get_Active_Partition_ID; Stream, Result : aliased + -- System.RPC.Params_Stream_Type (0); begin + -- Put_Package_RPC_Receiver_In_Stream; (the package RPC receiver + -- comes from RCI_Cache.Get_RCI_Package_Receiver) + -- Put_Subprogram_Id_In_Stream; Put_Parameters_In_Stream; Do_RPC + -- (Stream, Result); Read_Exception_Occurrence_From_Result; + -- Raise_It; + -- Read_Out_Parameters_And_Function_Return_From_Stream; end X; + + -- There are some variations: Do_APC is called for an asynchronous + -- procedure and the part after the call is completely ommitted as + -- well as the declaration of Result. For a function call, 'Input is + -- always used to read the result even if it is constrained. + + Stream_Parameter := + Make_Defining_Identifier (Loc, New_Internal_Name ('S')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Stream_Parameter, + Aliased_Present => True, + Object_Definition => + Make_Subtype_Indication (Loc, + Subtype_Mark => + New_Occurrence_Of (RTE (RE_Params_Stream_Type), Loc), + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + Constraints => + New_List (Make_Integer_Literal (Loc, 0)))))); + + if not Is_Known_Asynchronous then + Result_Parameter := + Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Result_Parameter, + Aliased_Present => True, + Object_Definition => + Make_Subtype_Indication (Loc, + Subtype_Mark => + New_Occurrence_Of (RTE (RE_Params_Stream_Type), Loc), + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + Constraints => + New_List (Make_Integer_Literal (Loc, 0)))))); + + Exception_Return_Parameter := + Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Exception_Return_Parameter, + Object_Definition => + New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc))); + + else + Result_Parameter := Empty; + Exception_Return_Parameter := Empty; + end if; + + -- Put first the RPC receiver corresponding to the remote package + + Append_To (Statements, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access), + Target_RPC_Receiver))); + + -- Then put the Subprogram_Id of the subprogram we want to call in + -- the stream. + + Append_To (Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access), + Subprogram_Id))); + + Current_Parameter := First (Ordered_Parameters_List); + while Present (Current_Parameter) loop + declare + Typ : constant Node_Id := + Parameter_Type (Current_Parameter); + Etyp : Entity_Id; + Constrained : Boolean; + Value : Node_Id; + Extra_Parameter : Entity_Id; + + begin + if Is_RACW_Controlling_Formal + (Current_Parameter, Stub_Type) + then + -- In the case of a controlling formal argument, we marshall + -- its addr field rather than the local stub. + + Append_To (Statements, + Pack_Node_Into_Stream (Loc, + Stream => Stream_Parameter, + Object => + Make_Selected_Component (Loc, + Prefix => + Defining_Identifier (Current_Parameter), + Selector_Name => Name_Addr), + Etyp => RTE (RE_Unsigned_64))); + + else + Value := + New_Occurrence_Of + (Defining_Identifier (Current_Parameter), Loc); + + -- Access type parameters are transmitted as in out + -- parameters. However, a dereference is needed so that + -- we marshall the designated object. + + if Nkind (Typ) = N_Access_Definition then + Value := Make_Explicit_Dereference (Loc, Value); + Etyp := Etype (Subtype_Mark (Typ)); + else + Etyp := Etype (Typ); + end if; + + Constrained := not Transmit_As_Unconstrained (Etyp); + + -- Any parameter but unconstrained out parameters are + -- transmitted to the peer. + + if In_Present (Current_Parameter) + or else not Out_Present (Current_Parameter) + or else not Constrained + then + Append_To (Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => + Output_From_Constrained (Constrained), + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access), + Value))); + end if; + end if; + + -- If the current parameter has a dynamic constrained status, + -- then this status is transmitted as well. + -- This should be done for accessibility as well ??? + + if Nkind (Typ) /= N_Access_Definition + and then Need_Extra_Constrained (Current_Parameter) + then + -- In this block, we do not use the extra formal that has + -- been created because it does not exist at the time of + -- expansion when building calling stubs for remote access + -- to subprogram types. We create an extra variable of this + -- type and push it in the stream after the regular + -- parameters. + + Extra_Parameter := Make_Defining_Identifier + (Loc, New_Internal_Name ('P')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Extra_Parameter, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Attribute_Name => Name_Constrained))); + + Append_To (Extra_Formal_Statements, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Standard_Boolean, Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of + (Stream_Parameter, Loc), Attribute_Name => + Name_Access), + New_Occurrence_Of (Extra_Parameter, Loc)))); + end if; + + Next (Current_Parameter); + end; + end loop; + + -- Append the formal statements list to the statements + + Append_List_To (Statements, Extra_Formal_Statements); + + if not Is_Known_Non_Asynchronous then + + -- Build the call to System.RPC.Do_APC + + Asynchronous_Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Do_Apc), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Target_Partition, Loc), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access)))); + else + Asynchronous_Statements := No_List; + end if; + + if not Is_Known_Asynchronous then + + -- Build the call to System.RPC.Do_RPC + + Non_Asynchronous_Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Do_Rpc), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Target_Partition, Loc), + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access), + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Result_Parameter, Loc), + Attribute_Name => Name_Access)))); + + -- Read the exception occurrence from the result stream and + -- reraise it. It does no harm if this is a Null_Occurrence since + -- this does nothing. + + Append_To (Non_Asynchronous_Statements, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc), + + Attribute_Name => Name_Read, + + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Result_Parameter, Loc), + Attribute_Name => Name_Access), + New_Occurrence_Of (Exception_Return_Parameter, Loc)))); + + Append_To (Non_Asynchronous_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Reraise_Occurrence), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Exception_Return_Parameter, Loc)))); + + if Is_Function then + + -- If this is a function call, then read the value and return + -- it. The return value is written/read using 'Output/'Input. + + Append_To (Non_Asynchronous_Statements, + Make_Tag_Check (Loc, + Make_Simple_Return_Statement (Loc, + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Etype (Result_Definition (Spec)), Loc), + + Attribute_Name => Name_Input, + + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Result_Parameter, Loc), + Attribute_Name => Name_Access)))))); + + else + -- Loop around parameters and assign out (or in out) + -- parameters. In the case of RACW, controlling arguments + -- cannot possibly have changed since they are remote, so we do + -- not read them from the stream. + + Current_Parameter := First (Ordered_Parameters_List); + while Present (Current_Parameter) loop + declare + Typ : constant Node_Id := + Parameter_Type (Current_Parameter); + Etyp : Entity_Id; + Value : Node_Id; + + begin + Value := + New_Occurrence_Of + (Defining_Identifier (Current_Parameter), Loc); + + if Nkind (Typ) = N_Access_Definition then + Value := Make_Explicit_Dereference (Loc, Value); + Etyp := Etype (Subtype_Mark (Typ)); + else + Etyp := Etype (Typ); + end if; + + if (Out_Present (Current_Parameter) + or else Nkind (Typ) = N_Access_Definition) + and then Etyp /= Stub_Type + then + Append_To (Non_Asynchronous_Statements, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Etyp, Loc), + + Attribute_Name => Name_Read, + + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Result_Parameter, Loc), + Attribute_Name => Name_Access), + Value))); + end if; + end; + + Next (Current_Parameter); + end loop; + end if; + end if; + + if Is_Known_Asynchronous then + Append_List_To (Statements, Asynchronous_Statements); + + elsif Is_Known_Non_Asynchronous then + Append_List_To (Statements, Non_Asynchronous_Statements); + + else + pragma Assert (Present (Asynchronous)); + Prepend_To (Asynchronous_Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Standard_Boolean, Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access), + New_Occurrence_Of (Standard_True, Loc)))); + + Prepend_To (Non_Asynchronous_Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Standard_Boolean, Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access), + New_Occurrence_Of (Standard_False, Loc)))); + + Append_To (Statements, + Make_Implicit_If_Statement (Nod, + Condition => Asynchronous, + Then_Statements => Asynchronous_Statements, + Else_Statements => Non_Asynchronous_Statements)); + end if; + end Build_General_Calling_Stubs; + + ----------------------------- + -- Build_RPC_Receiver_Body -- + ----------------------------- + + procedure Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id) + is + Loc : constant Source_Ptr := Sloc (RPC_Receiver); + + RPC_Receiver_Spec : Node_Id; + RPC_Receiver_Decls : List_Id; + + begin + Request := Make_Defining_Identifier (Loc, Name_R); + + RPC_Receiver_Spec := + Build_RPC_Receiver_Specification + (RPC_Receiver => RPC_Receiver, + Request_Parameter => Request); + + Subp_Id := Make_Defining_Identifier (Loc, New_Internal_Name ('P')); + Subp_Index := Subp_Id; + + -- Subp_Id may not be a constant, because in the case of the RPC + -- receiver for an RCI package, when a call is received from a RAS + -- dereference, it will be assigned during subsequent processing. + + RPC_Receiver_Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Id, + Object_Definition => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), + Attribute_Name => Name_Input, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request, + Selector_Name => Name_Params))))); + + Stmts := New_List; + + Decl := + Make_Subprogram_Body (Loc, + Specification => RPC_Receiver_Spec, + Declarations => RPC_Receiver_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stmts)); + end Build_RPC_Receiver_Body; + + ----------------------- + -- Build_Stub_Target -- + ----------------------- + + function Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target + is + Target_Info : RPC_Target (PCS_Kind => Name_GARLIC_DSA); + begin + Target_Info.Partition := + Make_Defining_Identifier (Loc, New_Internal_Name ('P')); + if Present (Controlling_Parameter) then + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Target_Info.Partition, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Partition_ID), Loc), + + Expression => + Make_Selected_Component (Loc, + Prefix => Controlling_Parameter, + Selector_Name => Name_Origin))); + + Target_Info.RPC_Receiver := + Make_Selected_Component (Loc, + Prefix => Controlling_Parameter, + Selector_Name => Name_Receiver); + + else + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Target_Info.Partition, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Partition_ID), Loc), + + Expression => + Make_Function_Call (Loc, + Name => Make_Selected_Component (Loc, + Prefix => + Make_Identifier (Loc, Chars (RCI_Locator)), + Selector_Name => + Make_Identifier (Loc, + Name_Get_Active_Partition_ID))))); + + Target_Info.RPC_Receiver := + Make_Selected_Component (Loc, + Prefix => + Make_Identifier (Loc, Chars (RCI_Locator)), + Selector_Name => + Make_Identifier (Loc, Name_Get_RCI_Package_Receiver)); + end if; + return Target_Info; + end Build_Stub_Target; + + --------------------- + -- Build_Stub_Type -- + --------------------- + + procedure Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id) + is + Loc : constant Source_Ptr := Sloc (Stub_Type); + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + + begin + Stub_Type_Decl := + Make_Full_Type_Declaration (Loc, + Defining_Identifier => Stub_Type, + Type_Definition => + Make_Record_Definition (Loc, + Tagged_Present => True, + Limited_Present => True, + Component_List => + Make_Component_List (Loc, + Component_Items => New_List ( + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Origin), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of ( + RTE (RE_Partition_ID), Loc))), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Receiver), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc))), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Addr), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc))), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Asynchronous), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of ( + Standard_Boolean, Loc))))))); + + if Is_RAS then + RPC_Receiver_Decl := Empty; + else + declare + RPC_Receiver_Request : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_R); + begin + RPC_Receiver_Decl := + Make_Subprogram_Declaration (Loc, + Build_RPC_Receiver_Specification ( + RPC_Receiver => Make_Defining_Identifier (Loc, + New_Internal_Name ('R')), + Request_Parameter => RPC_Receiver_Request)); + end; + end if; + end Build_Stub_Type; + + -------------------------------------- + -- Build_Subprogram_Receiving_Stubs -- + -------------------------------------- + + function Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id + is + Loc : constant Source_Ptr := Sloc (Vis_Decl); + + Request_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('R')); + -- Formal parameter for receiving stubs: a descriptor for an incoming + -- request. + + Decls : constant List_Id := New_List; + -- All the parameters will get declared before calling the real + -- subprograms. Also the out parameters will be declared. + + Statements : constant List_Id := New_List; + + Extra_Formal_Statements : constant List_Id := New_List; + -- Statements concerning extra formal parameters + + After_Statements : constant List_Id := New_List; + -- Statements to be executed after the subprogram call + + Inner_Decls : List_Id := No_List; + -- In case of a function, the inner declarations are needed since + -- the result may be unconstrained. + + Excep_Handlers : List_Id := No_List; + Excep_Choice : Entity_Id; + Excep_Code : List_Id; + + Parameter_List : constant List_Id := New_List; + -- List of parameters to be passed to the subprogram + + Current_Parameter : Node_Id; + + Ordered_Parameters_List : constant List_Id := + Build_Ordered_Parameters_List + (Specification (Vis_Decl)); + + Subp_Spec : Node_Id; + -- Subprogram specification + + Called_Subprogram : Node_Id; + -- The subprogram to call + + Null_Raise_Statement : Node_Id; + + Dynamic_Async : Entity_Id; + + begin + if Present (RACW_Type) then + Called_Subprogram := New_Occurrence_Of (Parent_Primitive, Loc); + else + Called_Subprogram := + New_Occurrence_Of + (Defining_Unit_Name (Specification (Vis_Decl)), Loc); + end if; + + if Dynamically_Asynchronous then + Dynamic_Async := + Make_Defining_Identifier (Loc, New_Internal_Name ('S')); + else + Dynamic_Async := Empty; + end if; + + if not Asynchronous or Dynamically_Asynchronous then + + -- The first statement after the subprogram call is a statement to + -- write a Null_Occurrence into the result stream. + + Null_Raise_Statement := + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Result), + New_Occurrence_Of (RTE (RE_Null_Occurrence), Loc))); + + if Dynamically_Asynchronous then + Null_Raise_Statement := + Make_Implicit_If_Statement (Vis_Decl, + Condition => + Make_Op_Not (Loc, New_Occurrence_Of (Dynamic_Async, Loc)), + Then_Statements => New_List (Null_Raise_Statement)); + end if; + + Append_To (After_Statements, Null_Raise_Statement); + end if; + + -- Loop through every parameter and get its value from the stream. If + -- the parameter is unconstrained, then the parameter is read using + -- 'Input at the point of declaration. + + Current_Parameter := First (Ordered_Parameters_List); + while Present (Current_Parameter) loop + declare + Etyp : Entity_Id; + Constrained : Boolean; + + Need_Extra_Constrained : Boolean; + -- True when an Extra_Constrained actual is required + + Object : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('P')); + + Expr : Node_Id := Empty; + + Is_Controlling_Formal : constant Boolean := + Is_RACW_Controlling_Formal + (Current_Parameter, Stub_Type); + + begin + if Is_Controlling_Formal then + + -- We have a controlling formal parameter. Read its address + -- rather than a real object. The address is in Unsigned_64 + -- form. + + Etyp := RTE (RE_Unsigned_64); + else + Etyp := Etype (Parameter_Type (Current_Parameter)); + end if; + + Constrained := not Transmit_As_Unconstrained (Etyp); + + if In_Present (Current_Parameter) + or else not Out_Present (Current_Parameter) + or else not Constrained + or else Is_Controlling_Formal + then + -- If an input parameter is constrained, then the read of + -- the parameter is deferred until the beginning of the + -- subprogram body. If it is unconstrained, then an + -- expression is built for the object declaration and the + -- variable is set using 'Input instead of 'Read. Note that + -- this deferral does not change the order in which the + -- actuals are read because Build_Ordered_Parameter_List + -- puts them unconstrained first. + + if Constrained then + Append_To (Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => Name_Read, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Params), + New_Occurrence_Of (Object, Loc)))); + + else + + -- Build and append Input_With_Tag_Check function + + Append_To (Decls, + Input_With_Tag_Check (Loc, + Var_Type => Etyp, + Stream => + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Params))); + + -- Prepare function call expression + + Expr := + Make_Function_Call (Loc, + Name => + New_Occurrence_Of + (Defining_Unit_Name + (Specification (Last (Decls))), Loc)); + end if; + end if; + + Need_Extra_Constrained := + Nkind (Parameter_Type (Current_Parameter)) /= + N_Access_Definition + and then + Ekind (Defining_Identifier (Current_Parameter)) /= E_Void + and then + Present (Extra_Constrained + (Defining_Identifier (Current_Parameter))); + + -- We may not associate an extra constrained actual to a + -- constant object, so if one is needed, declare the actual + -- as a variable even if it won't be modified. + + Build_Actual_Object_Declaration + (Object => Object, + Etyp => Etyp, + Variable => Need_Extra_Constrained + or else Out_Present (Current_Parameter), + Expr => Expr, + Decls => Decls); + + -- An out parameter may be written back using a 'Write + -- attribute instead of a 'Output because it has been + -- constrained by the parameter given to the caller. Note that + -- out controlling arguments in the case of a RACW are not put + -- back in the stream because the pointer on them has not + -- changed. + + if Out_Present (Current_Parameter) + and then + Etype (Parameter_Type (Current_Parameter)) /= Stub_Type + then + Append_To (After_Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Result), + New_Occurrence_Of (Object, Loc)))); + end if; + + -- For RACW controlling formals, the Etyp of Object is always + -- an RACW, even if the parameter is not of an anonymous access + -- type. In such case, we need to dereference it at call time. + + if Is_Controlling_Formal then + if Nkind (Parameter_Type (Current_Parameter)) /= + N_Access_Definition + then + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + Make_Explicit_Dereference (Loc, + Unchecked_Convert_To (RACW_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Object, Loc)))))); + + else + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + Unchecked_Convert_To (RACW_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Object, Loc))))); + end if; + + else + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + New_Occurrence_Of (Object, Loc))); + end if; + + -- If the current parameter needs an extra formal, then read it + -- from the stream and set the corresponding semantic field in + -- the variable. If the kind of the parameter identifier is + -- E_Void, then this is a compiler generated parameter that + -- doesn't need an extra constrained status. + + -- The case of Extra_Accessibility should also be handled ??? + + if Need_Extra_Constrained then + declare + Extra_Parameter : constant Entity_Id := + Extra_Constrained + (Defining_Identifier + (Current_Parameter)); + + Formal_Entity : constant Entity_Id := + Make_Defining_Identifier + (Loc, Chars (Extra_Parameter)); + + Formal_Type : constant Entity_Id := + Etype (Extra_Parameter); + + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Formal_Entity, + Object_Definition => + New_Occurrence_Of (Formal_Type, Loc))); + + Append_To (Extra_Formal_Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of ( + Formal_Type, Loc), + Attribute_Name => Name_Read, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Params), + New_Occurrence_Of (Formal_Entity, Loc)))); + + -- Note: the call to Set_Extra_Constrained below relies + -- on the fact that Object's Ekind has been set by + -- Build_Actual_Object_Declaration. + + Set_Extra_Constrained (Object, Formal_Entity); + end; + end if; + end; + + Next (Current_Parameter); + end loop; + + -- Append the formal statements list at the end of regular statements + + Append_List_To (Statements, Extra_Formal_Statements); + + if Nkind (Specification (Vis_Decl)) = N_Function_Specification then + + -- The remote subprogram is a function. We build an inner block to + -- be able to hold a potentially unconstrained result in a + -- variable. + + declare + Etyp : constant Entity_Id := + Etype (Result_Definition (Specification (Vis_Decl))); + Result : constant Node_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('R')); + begin + Inner_Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Result, + Constant_Present => True, + Object_Definition => New_Occurrence_Of (Etyp, Loc), + Expression => + Make_Function_Call (Loc, + Name => Called_Subprogram, + Parameter_Associations => Parameter_List))); + + if Is_Class_Wide_Type (Etyp) then + + -- For a remote call to a function with a class-wide type, + -- check that the returned value satisfies the requirements + -- of E.4(18). + + Append_To (Inner_Decls, + Make_Transportable_Check (Loc, + New_Occurrence_Of (Result, Loc))); + + end if; + + Append_To (After_Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => Name_Output, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Result), + New_Occurrence_Of (Result, Loc)))); + end; + + Append_To (Statements, + Make_Block_Statement (Loc, + Declarations => Inner_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => After_Statements))); + + else + -- The remote subprogram is a procedure. We do not need any inner + -- block in this case. + + if Dynamically_Asynchronous then + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Dynamic_Async, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc))); + + Append_To (Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Standard_Boolean, Loc), + Attribute_Name => Name_Read, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Params), + New_Occurrence_Of (Dynamic_Async, Loc)))); + end if; + + Append_To (Statements, + Make_Procedure_Call_Statement (Loc, + Name => Called_Subprogram, + Parameter_Associations => Parameter_List)); + + Append_List_To (Statements, After_Statements); + end if; + + if Asynchronous and then not Dynamically_Asynchronous then + + -- For an asynchronous procedure, add a null exception handler + + Excep_Handlers := New_List ( + Make_Implicit_Exception_Handler (Loc, + Exception_Choices => New_List (Make_Others_Choice (Loc)), + Statements => New_List (Make_Null_Statement (Loc)))); + + else + -- In the other cases, if an exception is raised, then the + -- exception occurrence is copied into the output stream and + -- no other output parameter is written. + + Excep_Choice := + Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + + Excep_Code := New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Result), + New_Occurrence_Of (Excep_Choice, Loc)))); + + if Dynamically_Asynchronous then + Excep_Code := New_List ( + Make_Implicit_If_Statement (Vis_Decl, + Condition => Make_Op_Not (Loc, + New_Occurrence_Of (Dynamic_Async, Loc)), + Then_Statements => Excep_Code)); + end if; + + Excep_Handlers := New_List ( + Make_Implicit_Exception_Handler (Loc, + Choice_Parameter => Excep_Choice, + Exception_Choices => New_List (Make_Others_Choice (Loc)), + Statements => Excep_Code)); + + end if; + + Subp_Spec := + Make_Procedure_Specification (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, New_Internal_Name ('F')), + + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Request_Parameter, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Request_Access), Loc)))); + + return + Make_Subprogram_Body (Loc, + Specification => Subp_Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements, + Exception_Handlers => Excep_Handlers)); + end Build_Subprogram_Receiving_Stubs; + + ------------ + -- Result -- + ------------ + + function Result return Node_Id is + begin + return Make_Identifier (Loc, Name_V); + end Result; + + ---------------------- + -- Stream_Parameter -- + ---------------------- + + function Stream_Parameter return Node_Id is + begin + return Make_Identifier (Loc, Name_S); + end Stream_Parameter; + + end GARLIC_Support; + + ------------------------------- + -- Get_And_Reset_RACW_Bodies -- + ------------------------------- + + function Get_And_Reset_RACW_Bodies (RACW_Type : Entity_Id) return List_Id is + Desig : constant Entity_Id := Etype (Designated_Type (RACW_Type)); + Stub_Elements : Stub_Structure := Stubs_Table.Get (Desig); + + Body_Decls : List_Id; + -- Returned list of declarations + + begin + if Stub_Elements = Empty_Stub_Structure then + + -- Stub elements may be missing as a consequence of a previously + -- detected error. + + return No_List; + end if; + + Body_Decls := Stub_Elements.Body_Decls; + Stub_Elements.Body_Decls := No_List; + Stubs_Table.Set (Desig, Stub_Elements); + return Body_Decls; + end Get_And_Reset_RACW_Bodies; + + ----------------------- + -- Get_Stub_Elements -- + ----------------------- + + function Get_Stub_Elements (RACW_Type : Entity_Id) return Stub_Structure is + Desig : constant Entity_Id := + Etype (Designated_Type (RACW_Type)); + Stub_Elements : constant Stub_Structure := Stubs_Table.Get (Desig); + begin + pragma Assert (Stub_Elements /= Empty_Stub_Structure); + return Stub_Elements; + end Get_Stub_Elements; + + ----------------------- + -- Get_Subprogram_Id -- + ----------------------- + + function Get_Subprogram_Id (Def : Entity_Id) return String_Id is + Result : constant String_Id := Get_Subprogram_Ids (Def).Str_Identifier; + begin + pragma Assert (Result /= No_String); + return Result; + end Get_Subprogram_Id; + + ----------------------- + -- Get_Subprogram_Id -- + ----------------------- + + function Get_Subprogram_Id (Def : Entity_Id) return Int is + begin + return Get_Subprogram_Ids (Def).Int_Identifier; + end Get_Subprogram_Id; + + ------------------------ + -- Get_Subprogram_Ids -- + ------------------------ + + function Get_Subprogram_Ids + (Def : Entity_Id) return Subprogram_Identifiers + is + begin + return Subprogram_Identifier_Table.Get (Def); + end Get_Subprogram_Ids; + + ---------- + -- Hash -- + ---------- + + function Hash (F : Entity_Id) return Hash_Index is + begin + return Hash_Index (Natural (F) mod Positive (Hash_Index'Last + 1)); + end Hash; + + function Hash (F : Name_Id) return Hash_Index is + begin + return Hash_Index (Natural (F) mod Positive (Hash_Index'Last + 1)); + end Hash; + + -------------------------- + -- Input_With_Tag_Check -- + -------------------------- + + function Input_With_Tag_Check + (Loc : Source_Ptr; + Var_Type : Entity_Id; + Stream : Node_Id) return Node_Id + is + begin + return + Make_Subprogram_Body (Loc, + Specification => Make_Function_Specification (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, New_Internal_Name ('S')), + Result_Definition => New_Occurrence_Of (Var_Type, Loc)), + Declarations => No_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, New_List ( + Make_Tag_Check (Loc, + Make_Simple_Return_Statement (Loc, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Var_Type, Loc), + Attribute_Name => Name_Input, + Expressions => + New_List (Stream))))))); + end Input_With_Tag_Check; + + -------------------------------- + -- Is_RACW_Controlling_Formal -- + -------------------------------- + + function Is_RACW_Controlling_Formal + (Parameter : Node_Id; + Stub_Type : Entity_Id) return Boolean + is + Typ : Entity_Id; + + begin + -- If the kind of the parameter is E_Void, then it is not a + -- controlling formal (this can happen in the context of RAS). + + if Ekind (Defining_Identifier (Parameter)) = E_Void then + return False; + end if; + + -- If the parameter is not a controlling formal, then it cannot + -- be possibly a RACW_Controlling_Formal. + + if not Is_Controlling_Formal (Defining_Identifier (Parameter)) then + return False; + end if; + + Typ := Parameter_Type (Parameter); + return (Nkind (Typ) = N_Access_Definition + and then Etype (Subtype_Mark (Typ)) = Stub_Type) + or else Etype (Typ) = Stub_Type; + end Is_RACW_Controlling_Formal; + + ------------------------------ + -- Make_Transportable_Check -- + ------------------------------ + + function Make_Transportable_Check + (Loc : Source_Ptr; + Expr : Node_Id) return Node_Id is + begin + return + Make_Raise_Program_Error (Loc, + Condition => + Make_Op_Not (Loc, + Build_Get_Transportable (Loc, + Make_Selected_Component (Loc, + Prefix => Expr, + Selector_Name => Make_Identifier (Loc, Name_uTag)))), + Reason => PE_Non_Transportable_Actual); + end Make_Transportable_Check; + + ----------------------------- + -- Make_Selected_Component -- + ----------------------------- + + function Make_Selected_Component + (Loc : Source_Ptr; + Prefix : Entity_Id; + Selector_Name : Name_Id) return Node_Id + is + begin + return Make_Selected_Component (Loc, + Prefix => New_Occurrence_Of (Prefix, Loc), + Selector_Name => Make_Identifier (Loc, Selector_Name)); + end Make_Selected_Component; + + -------------------- + -- Make_Tag_Check -- + -------------------- + + function Make_Tag_Check (Loc : Source_Ptr; N : Node_Id) return Node_Id is + Occ : constant Entity_Id := + Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + + begin + return Make_Block_Statement (Loc, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List (N), + + Exception_Handlers => New_List ( + Make_Implicit_Exception_Handler (Loc, + Choice_Parameter => Occ, + + Exception_Choices => + New_List (New_Occurrence_Of (RTE (RE_Tag_Error), Loc)), + + Statements => + New_List (Make_Procedure_Call_Statement (Loc, + New_Occurrence_Of + (RTE (RE_Raise_Program_Error_Unknown_Tag), Loc), + New_List (New_Occurrence_Of (Occ, Loc)))))))); + end Make_Tag_Check; + + ---------------------------- + -- Need_Extra_Constrained -- + ---------------------------- + + function Need_Extra_Constrained (Parameter : Node_Id) return Boolean is + Etyp : constant Entity_Id := Etype (Parameter_Type (Parameter)); + begin + return Out_Present (Parameter) + and then Has_Discriminants (Etyp) + and then not Is_Constrained (Etyp) + and then not Is_Indefinite_Subtype (Etyp); + end Need_Extra_Constrained; + + ------------------------------------ + -- Pack_Entity_Into_Stream_Access -- + ------------------------------------ + + function Pack_Entity_Into_Stream_Access + (Loc : Source_Ptr; + Stream : Node_Id; + Object : Entity_Id; + Etyp : Entity_Id := Empty) return Node_Id + is + Typ : Entity_Id; + + begin + if Present (Etyp) then + Typ := Etyp; + else + Typ := Etype (Object); + end if; + + return + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream, + Object => New_Occurrence_Of (Object, Loc), + Etyp => Typ); + end Pack_Entity_Into_Stream_Access; + + --------------------------- + -- Pack_Node_Into_Stream -- + --------------------------- + + function Pack_Node_Into_Stream + (Loc : Source_Ptr; + Stream : Entity_Id; + Object : Node_Id; + Etyp : Entity_Id) return Node_Id + is + Write_Attribute : Name_Id := Name_Write; + + begin + if not Is_Constrained (Etyp) then + Write_Attribute := Name_Output; + end if; + + return + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => Write_Attribute, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Stream, Loc), + Attribute_Name => Name_Access), + Object)); + end Pack_Node_Into_Stream; + + ---------------------------------- + -- Pack_Node_Into_Stream_Access -- + ---------------------------------- + + function Pack_Node_Into_Stream_Access + (Loc : Source_Ptr; + Stream : Node_Id; + Object : Node_Id; + Etyp : Entity_Id) return Node_Id + is + Write_Attribute : Name_Id := Name_Write; + + begin + if not Is_Constrained (Etyp) then + Write_Attribute := Name_Output; + end if; + + return + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => Write_Attribute, + Expressions => New_List ( + Stream, + Object)); + end Pack_Node_Into_Stream_Access; + + --------------------- + -- PolyORB_Support -- + --------------------- + + package body PolyORB_Support is + + -- Local subprograms + + procedure Add_RACW_Read_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Body_Decls : List_Id); + -- Add Read attribute for the RACW type. The declaration and attribute + -- definition clauses are inserted right after the declaration of + -- RACW_Type. If Body_Decls is not No_List, the subprogram body is + -- appended to it (case where the RACW declaration is in the main unit). + + procedure Add_RACW_Write_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Body_Decls : List_Id); + -- Same as above for the Write attribute + + procedure Add_RACW_From_Any + (RACW_Type : Entity_Id; + Body_Decls : List_Id); + -- Add the From_Any TSS for this RACW type + + procedure Add_RACW_To_Any + (RACW_Type : Entity_Id; + Body_Decls : List_Id); + -- Add the To_Any TSS for this RACW type + + procedure Add_RACW_TypeCode + (Designated_Type : Entity_Id; + RACW_Type : Entity_Id; + Body_Decls : List_Id); + -- Add the TypeCode TSS for this RACW type + + procedure Add_RAS_From_Any (RAS_Type : Entity_Id); + -- Add the From_Any TSS for this RAS type + + procedure Add_RAS_To_Any (RAS_Type : Entity_Id); + -- Add the To_Any TSS for this RAS type + + procedure Add_RAS_TypeCode (RAS_Type : Entity_Id); + -- Add the TypeCode TSS for this RAS type + + procedure Add_RAS_Access_TSS (N : Node_Id); + -- Add a subprogram body for RAS Access TSS + + ------------------------------------- + -- Add_Obj_RPC_Receiver_Completion -- + ------------------------------------- + + procedure Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure) + is + Desig : constant Entity_Id := + Etype (Designated_Type (Stub_Elements.RACW_Type)); + begin + Append_To (Decls, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Register_Obj_Receiving_Stub), Loc), + + Parameter_Associations => New_List ( + + -- Name + + Make_String_Literal (Loc, + Full_Qualified_Name (Desig)), + + -- Handler + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Defining_Unit_Name (Parent (RPC_Receiver)), Loc), + Attribute_Name => + Name_Access), + + -- Receiver + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Defining_Identifier ( + Stub_Elements.RPC_Receiver_Decl), Loc), + Attribute_Name => + Name_Access)))); + end Add_Obj_RPC_Receiver_Completion; + + ----------------------- + -- Add_RACW_Features -- + ----------------------- + + procedure Add_RACW_Features + (RACW_Type : Entity_Id; + Desig : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Body_Decls : List_Id) + is + pragma Warnings (Off); + pragma Unreferenced (RPC_Receiver_Decl); + pragma Warnings (On); + + begin + Add_RACW_From_Any + (RACW_Type => RACW_Type, + Body_Decls => Body_Decls); + + Add_RACW_To_Any + (RACW_Type => RACW_Type, + Body_Decls => Body_Decls); + + Add_RACW_Write_Attribute + (RACW_Type => RACW_Type, + Stub_Type => Stub_Type, + Stub_Type_Access => Stub_Type_Access, + Body_Decls => Body_Decls); + + Add_RACW_Read_Attribute + (RACW_Type => RACW_Type, + Stub_Type => Stub_Type, + Stub_Type_Access => Stub_Type_Access, + Body_Decls => Body_Decls); + + Add_RACW_TypeCode + (Designated_Type => Desig, + RACW_Type => RACW_Type, + Body_Decls => Body_Decls); + end Add_RACW_Features; + + ----------------------- + -- Add_RACW_From_Any -- + ----------------------- + + procedure Add_RACW_From_Any + (RACW_Type : Entity_Id; + Body_Decls : List_Id) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + + Fnam : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_External_Name (Chars (RACW_Type), 'F')); + + Func_Spec : Node_Id; + Func_Decl : Node_Id; + Func_Body : Node_Id; + + Statements : List_Id; + -- Various parts of the subprogram + + Any_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_A); + + Asynchronous_Flag : constant Entity_Id := + Asynchronous_Flags_Table.Get (RACW_Type); + -- The flag object declared in Add_RACW_Asynchronous_Flag + + begin + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => + Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => + Any_Parameter, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Any), Loc))), + Result_Definition => New_Occurrence_Of (RACW_Type, Loc)); + + -- NOTE: The usage occurrences of RACW_Parameter must refer to the + -- entity in the declaration spec, not those of the body spec. + + Func_Decl := Make_Subprogram_Declaration (Loc, Func_Spec); + Insert_After (Declaration_Node (RACW_Type), Func_Decl); + Set_Renaming_TSS (RACW_Type, Fnam, TSS_From_Any); + + if No (Body_Decls) then + return; + end if; + + -- ??? Issue with asynchronous calls here: the Asynchronous flag is + -- set on the stub type if, and only if, the RACW type has a pragma + -- Asynchronous. This is incorrect for RACWs that implement RAS + -- types, because in that case the /designated subprogram/ (not the + -- type) might be asynchronous, and that causes the stub to need to + -- be asynchronous too. A solution is to transport a RAS as a struct + -- containing a RACW and an asynchronous flag, and to properly alter + -- the Asynchronous component in the stub type in the RAS's _From_Any + -- TSS. + + Statements := New_List ( + Make_Simple_Return_Statement (Loc, + Expression => Unchecked_Convert_To (RACW_Type, + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_Get_RACW), Loc), + Parameter_Associations => New_List ( + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_FA_ObjRef), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any_Parameter, Loc))), + Build_Stub_Tag (Loc, RACW_Type), + New_Occurrence_Of (Boolean_Literals (Is_RAS), Loc), + New_Occurrence_Of (Asynchronous_Flag, Loc)))))); + + Func_Body := + Make_Subprogram_Body (Loc, + Specification => Copy_Specification (Loc, Func_Spec), + Declarations => No_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements)); + + Append_To (Body_Decls, Func_Body); + end Add_RACW_From_Any; + + ----------------------------- + -- Add_RACW_Read_Attribute -- + ----------------------------- + + procedure Add_RACW_Read_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Body_Decls : List_Id) + is + pragma Warnings (Off); + pragma Unreferenced (Stub_Type, Stub_Type_Access); + pragma Warnings (On); + Loc : constant Source_Ptr := Sloc (RACW_Type); + + Proc_Decl : Node_Id; + Attr_Decl : Node_Id; + + Body_Node : Node_Id; + + Decls : constant List_Id := New_List; + Statements : constant List_Id := New_List; + Reference : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_R); + -- Various parts of the procedure + + Pnam : constant Entity_Id := Make_Defining_Identifier (Loc, + New_Internal_Name ('R')); + + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + + Asynchronous_Flag : constant Entity_Id := + Asynchronous_Flags_Table.Get (RACW_Type); + pragma Assert (Present (Asynchronous_Flag)); + + function Stream_Parameter return Node_Id; + function Result return Node_Id; + + -- Functions to create occurrences of the formal parameter names + + ------------ + -- Result -- + ------------ + + function Result return Node_Id is + begin + return Make_Identifier (Loc, Name_V); + end Result; + + ---------------------- + -- Stream_Parameter -- + ---------------------- + + function Stream_Parameter return Node_Id is + begin + return Make_Identifier (Loc, Name_S); + end Stream_Parameter; + + -- Start of processing for Add_RACW_Read_Attribute + + begin + Build_Stream_Procedure + (Loc, RACW_Type, Body_Node, Pnam, Statements, Outp => True); + + Proc_Decl := Make_Subprogram_Declaration (Loc, + Copy_Specification (Loc, Specification (Body_Node))); + + Attr_Decl := + Make_Attribute_Definition_Clause (Loc, + Name => New_Occurrence_Of (RACW_Type, Loc), + Chars => Name_Read, + Expression => + New_Occurrence_Of ( + Defining_Unit_Name (Specification (Proc_Decl)), Loc)); + + Insert_After (Declaration_Node (RACW_Type), Proc_Decl); + Insert_After (Proc_Decl, Attr_Decl); + + if No (Body_Decls) then + return; + end if; + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Reference, + Object_Definition => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc))); + + Append_List_To (Statements, New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc), + Attribute_Name => Name_Read, + Expressions => New_List ( + Stream_Parameter, + New_Occurrence_Of (Reference, Loc))), + + Make_Assignment_Statement (Loc, + Name => + Result, + Expression => + Unchecked_Convert_To (RACW_Type, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_RACW), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Reference, Loc), + Build_Stub_Tag (Loc, RACW_Type), + New_Occurrence_Of (Boolean_Literals (Is_RAS), Loc), + New_Occurrence_Of (Asynchronous_Flag, Loc))))))); + + Set_Declarations (Body_Node, Decls); + Append_To (Body_Decls, Body_Node); + end Add_RACW_Read_Attribute; + + --------------------- + -- Add_RACW_To_Any -- + --------------------- + + procedure Add_RACW_To_Any + (RACW_Type : Entity_Id; + Body_Decls : List_Id) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); + + Fnam : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_External_Name (Chars (RACW_Type), 'T')); + + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + + Stub_Elements : constant Stub_Structure := + Get_Stub_Elements (RACW_Type); + + Func_Spec : Node_Id; + Func_Decl : Node_Id; + Func_Body : Node_Id; + + Decls : List_Id; + Statements : List_Id; + -- Various parts of the subprogram + + RACW_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_R); + + Reference : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('R')); + Any : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('A')); + + begin + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => + Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => + RACW_Parameter, + Parameter_Type => + New_Occurrence_Of (RACW_Type, Loc))), + Result_Definition => New_Occurrence_Of (RTE (RE_Any), Loc)); + + -- NOTE: The usage occurrences of RACW_Parameter must refer to the + -- entity in the declaration spec, not in the body spec. + + Func_Decl := Make_Subprogram_Declaration (Loc, Func_Spec); + + Insert_After (Declaration_Node (RACW_Type), Func_Decl); + Set_Renaming_TSS (RACW_Type, Fnam, TSS_To_Any); + + if No (Body_Decls) then + return; + end if; + + -- Generate: + + -- R : constant Object_Ref := + -- Get_Reference + -- (Address!(RACW), + -- "typ", + -- Stub_Type'Tag, + -- Is_RAS, + -- RPC_Receiver'Access); + -- A : Any; + + Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Reference, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_Get_Reference), Loc), + Parameter_Associations => New_List ( + Unchecked_Convert_To (RTE (RE_Address), + New_Occurrence_Of (RACW_Parameter, Loc)), + Make_String_Literal (Loc, + Strval => Full_Qualified_Name + (Etype (Designated_Type (RACW_Type)))), + Build_Stub_Tag (Loc, RACW_Type), + New_Occurrence_Of (Boolean_Literals (Is_RAS), Loc), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of + (Defining_Identifier + (Stub_Elements.RPC_Receiver_Decl), Loc), + Attribute_Name => Name_Access)))), + + Make_Object_Declaration (Loc, + Defining_Identifier => Any, + Object_Definition => New_Occurrence_Of (RTE (RE_Any), Loc))); + + -- Generate: + + -- Any := TA_ObjRef (Reference); + -- Set_TC (Any, RPC_Receiver.Obj_TypeCode); + -- return Any; + + Statements := New_List ( + Make_Assignment_Statement (Loc, + Name => New_Occurrence_Of (Any, Loc), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_TA_ObjRef), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Reference, Loc)))), + + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Set_TC), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Make_Selected_Component (Loc, + Prefix => + Defining_Identifier ( + Stub_Elements.RPC_Receiver_Decl), + Selector_Name => Name_Obj_TypeCode))), + + Make_Simple_Return_Statement (Loc, + Expression => New_Occurrence_Of (Any, Loc))); + + Func_Body := + Make_Subprogram_Body (Loc, + Specification => Copy_Specification (Loc, Func_Spec), + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements)); + Append_To (Body_Decls, Func_Body); + end Add_RACW_To_Any; + + ----------------------- + -- Add_RACW_TypeCode -- + ----------------------- + + procedure Add_RACW_TypeCode + (Designated_Type : Entity_Id; + RACW_Type : Entity_Id; + Body_Decls : List_Id) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); + + Fnam : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_External_Name (Chars (RACW_Type), 'Y')); + + Stub_Elements : constant Stub_Structure := + Stubs_Table.Get (Designated_Type); + pragma Assert (Stub_Elements /= Empty_Stub_Structure); + + Func_Spec : Node_Id; + Func_Decl : Node_Id; + Func_Body : Node_Id; + + begin + + -- The spec for this subprogram has a dummy 'access RACW' argument, + -- which serves only for overloading purposes. + + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Fnam, + Result_Definition => New_Occurrence_Of (RTE (RE_TypeCode), Loc)); + + -- NOTE: The usage occurrences of RACW_Parameter must refer to the + -- entity in the declaration spec, not those of the body spec. + + Func_Decl := Make_Subprogram_Declaration (Loc, Func_Spec); + Insert_After (Declaration_Node (RACW_Type), Func_Decl); + Set_Renaming_TSS (RACW_Type, Fnam, TSS_TypeCode); + + if No (Body_Decls) then + return; + end if; + + Func_Body := + Make_Subprogram_Body (Loc, + Specification => Copy_Specification (Loc, Func_Spec), + Declarations => Empty_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List ( + Make_Simple_Return_Statement (Loc, + Expression => + Make_Selected_Component (Loc, + Prefix => + Defining_Identifier + (Stub_Elements.RPC_Receiver_Decl), + Selector_Name => Name_Obj_TypeCode))))); + + Append_To (Body_Decls, Func_Body); + end Add_RACW_TypeCode; + + ------------------------------ + -- Add_RACW_Write_Attribute -- + ------------------------------ + + procedure Add_RACW_Write_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Body_Decls : List_Id) + is + pragma Warnings (Off); + pragma Unreferenced (Stub_Type, Stub_Type_Access); + pragma Warnings (On); + + Loc : constant Source_Ptr := Sloc (RACW_Type); + + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + + Stub_Elements : constant Stub_Structure := + Get_Stub_Elements (RACW_Type); + + Body_Node : Node_Id; + Proc_Decl : Node_Id; + Attr_Decl : Node_Id; + + Statements : constant List_Id := New_List; + Pnam : constant Entity_Id := + Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + + function Stream_Parameter return Node_Id; + function Object return Node_Id; + -- Functions to create occurrences of the formal parameter names + + ------------ + -- Object -- + ------------ + + function Object return Node_Id is + begin + return Make_Identifier (Loc, Name_V); + end Object; + + ---------------------- + -- Stream_Parameter -- + ---------------------- + + function Stream_Parameter return Node_Id is + begin + return Make_Identifier (Loc, Name_S); + end Stream_Parameter; + + -- Start of processing for Add_RACW_Write_Attribute + + begin + Build_Stream_Procedure + (Loc, RACW_Type, Body_Node, Pnam, Statements, Outp => False); + + Proc_Decl := + Make_Subprogram_Declaration (Loc, + Copy_Specification (Loc, Specification (Body_Node))); + + Attr_Decl := + Make_Attribute_Definition_Clause (Loc, + Name => New_Occurrence_Of (RACW_Type, Loc), + Chars => Name_Write, + Expression => + New_Occurrence_Of ( + Defining_Unit_Name (Specification (Proc_Decl)), Loc)); + + Insert_After (Declaration_Node (RACW_Type), Proc_Decl); + Insert_After (Proc_Decl, Attr_Decl); + + if No (Body_Decls) then + return; + end if; + + Append_To (Statements, + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_Get_Reference), Loc), + Parameter_Associations => New_List ( + Unchecked_Convert_To (RTE (RE_Address), Object), + Make_String_Literal (Loc, + Strval => Full_Qualified_Name + (Etype (Designated_Type (RACW_Type)))), + Build_Stub_Tag (Loc, RACW_Type), + New_Occurrence_Of (Boolean_Literals (Is_RAS), Loc), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of + (Defining_Identifier + (Stub_Elements.RPC_Receiver_Decl), Loc), + Attribute_Name => Name_Access))), + + Etyp => RTE (RE_Object_Ref))); + + Append_To (Body_Decls, Body_Node); + end Add_RACW_Write_Attribute; + + ----------------------- + -- Add_RAST_Features -- + ----------------------- + + procedure Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id) + is + begin + Add_RAS_Access_TSS (Vis_Decl); + + Add_RAS_From_Any (RAS_Type); + Add_RAS_TypeCode (RAS_Type); + + -- To_Any uses TypeCode, and therefore needs to be generated last + + Add_RAS_To_Any (RAS_Type); + end Add_RAST_Features; + + ------------------------ + -- Add_RAS_Access_TSS -- + ------------------------ + + procedure Add_RAS_Access_TSS (N : Node_Id) is + Loc : constant Source_Ptr := Sloc (N); + + Ras_Type : constant Entity_Id := Defining_Identifier (N); + Fat_Type : constant Entity_Id := Equivalent_Type (Ras_Type); + -- Ras_Type is the access to subprogram type; Fat_Type is the + -- corresponding record type. + + RACW_Type : constant Entity_Id := + Underlying_RACW_Type (Ras_Type); + + Stub_Elements : constant Stub_Structure := + Get_Stub_Elements (RACW_Type); + + Proc : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Make_TSS_Name (Ras_Type, TSS_RAS_Access)); + + Proc_Spec : Node_Id; + + -- Formal parameters + + Package_Name : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_P); + + -- Target package + + Subp_Id : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_S); + + -- Target subprogram + + Asynch_P : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_Asynchronous); + -- Is the procedure to which the 'Access applies asynchronous? + + All_Calls_Remote : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_All_Calls_Remote); + -- True if an All_Calls_Remote pragma applies to the RCI unit + -- that contains the subprogram. + + -- Common local variables + + Proc_Decls : List_Id; + Proc_Statements : List_Id; + + Subp_Ref : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_R); + -- Reference that designates the target subprogram (returned + -- by Get_RAS_Info). + + Is_Local : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_L); + Local_Addr : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_A); + -- For the call to Get_Local_Address + + -- Additional local variables for the remote case + + Local_Stub : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('L')); + + Stub_Ptr : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('S')); + + function Set_Field + (Field_Name : Name_Id; + Value : Node_Id) return Node_Id; + -- Construct an assignment that sets the named component in the + -- returned record + + --------------- + -- Set_Field -- + --------------- + + function Set_Field + (Field_Name : Name_Id; + Value : Node_Id) return Node_Id + is + begin + return + Make_Assignment_Statement (Loc, + Name => + Make_Selected_Component (Loc, + Prefix => Stub_Ptr, + Selector_Name => Field_Name), + Expression => Value); + end Set_Field; + + -- Start of processing for Add_RAS_Access_TSS + + begin + Proc_Decls := New_List ( + + -- Common declarations + + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Ref, + Object_Definition => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Is_Local, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Local_Addr, + Object_Definition => + New_Occurrence_Of (RTE (RE_Address), Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Local_Stub, + Aliased_Present => True, + Object_Definition => + New_Occurrence_Of (Stub_Elements.Stub_Type, Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Stub_Ptr, + Object_Definition => + New_Occurrence_Of (Stub_Elements.Stub_Type_Access, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Local_Stub, Loc), + Attribute_Name => Name_Unchecked_Access))); + + Set_Etype (Stub_Ptr, Stub_Elements.Stub_Type_Access); + -- Build_Get_Unique_RP_Call needs this information + + -- Get_RAS_Info (Pkg, Subp, R); + -- Obtain a reference to the target subprogram + + Proc_Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Get_RAS_Info), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Package_Name, Loc), + New_Occurrence_Of (Subp_Id, Loc), + New_Occurrence_Of (Subp_Ref, Loc))), + + -- Get_Local_Address (R, L, A); + -- Determine whether the subprogram is local (L), and if so + -- obtain the local address of its proxy (A). + + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Get_Local_Address), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Subp_Ref, Loc), + New_Occurrence_Of (Is_Local, Loc), + New_Occurrence_Of (Local_Addr, Loc)))); + + -- Note: Here we assume that the Fat_Type is a record containing just + -- an access to a proxy or stub object. + + Append_To (Proc_Statements, + + -- if L then + + Make_Implicit_If_Statement (N, + Condition => New_Occurrence_Of (Is_Local, Loc), + + Then_Statements => New_List ( + + -- if A.Target = null then + + Make_Implicit_If_Statement (N, + Condition => + Make_Op_Eq (Loc, + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To + (RTE (RE_RAS_Proxy_Type_Access), + New_Occurrence_Of (Local_Addr, Loc)), + Selector_Name => Make_Identifier (Loc, Name_Target)), + Make_Null (Loc)), + + Then_Statements => New_List ( + + -- A.Target := Entity_Of (Ref); + + Make_Assignment_Statement (Loc, + Name => + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To + (RTE (RE_RAS_Proxy_Type_Access), + New_Occurrence_Of (Local_Addr, Loc)), + Selector_Name => Make_Identifier (Loc, Name_Target)), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_Entity_Of), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Subp_Ref, Loc)))), + + -- Inc_Usage (A.Target); + + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Inc_Usage), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To + (RTE (RE_RAS_Proxy_Type_Access), + New_Occurrence_Of (Local_Addr, Loc)), + Selector_Name => + Make_Identifier (Loc, Name_Target)))))), + + -- end if; + -- if not All_Calls_Remote then + -- return Fat_Type!(A); + -- end if; + + Make_Implicit_If_Statement (N, + Condition => + Make_Op_Not (Loc, + Right_Opnd => + New_Occurrence_Of (All_Calls_Remote, Loc)), + + Then_Statements => New_List ( + Make_Simple_Return_Statement (Loc, + Expression => + Unchecked_Convert_To + (Fat_Type, New_Occurrence_Of (Local_Addr, Loc)))))))); + + Append_List_To (Proc_Statements, New_List ( + + -- Stub.Target := Entity_Of (Ref); + + Set_Field (Name_Target, + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_Entity_Of), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Subp_Ref, Loc)))), + + -- Inc_Usage (Stub.Target); + + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Inc_Usage), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => Stub_Ptr, + Selector_Name => Name_Target))), + + -- E.4.1(9) A remote call is asynchronous if it is a call to + -- a procedure, or a call through a value of an access-to-procedure + -- type, to which a pragma Asynchronous applies. + + -- Parameter Asynch_P is true when the procedure is asynchronous; + -- Expression Asynch_T is true when the type is asynchronous. + + Set_Field (Name_Asynchronous, + Make_Or_Else (Loc, + Left_Opnd => New_Occurrence_Of (Asynch_P, Loc), + Right_Opnd => + New_Occurrence_Of + (Boolean_Literals (Is_Asynchronous (Ras_Type)), Loc))))); + + Append_List_To (Proc_Statements, + Build_Get_Unique_RP_Call (Loc, Stub_Ptr, Stub_Elements.Stub_Type)); + + Append_To (Proc_Statements, + Make_Simple_Return_Statement (Loc, + Expression => + Unchecked_Convert_To (Fat_Type, + New_Occurrence_Of (Stub_Ptr, Loc)))); + + Proc_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Proc, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Package_Name, + Parameter_Type => + New_Occurrence_Of (Standard_String, Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => Subp_Id, + Parameter_Type => + New_Occurrence_Of (Standard_String, Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => Asynch_P, + Parameter_Type => + New_Occurrence_Of (Standard_Boolean, Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => All_Calls_Remote, + Parameter_Type => + New_Occurrence_Of (Standard_Boolean, Loc))), + + Result_Definition => + New_Occurrence_Of (Fat_Type, Loc)); + + -- Set the kind and return type of the function to prevent + -- ambiguities between Ras_Type and Fat_Type in subsequent analysis. + + Set_Ekind (Proc, E_Function); + Set_Etype (Proc, Fat_Type); + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Proc_Spec, + Declarations => Proc_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Proc_Statements))); + + Set_TSS (Fat_Type, Proc); + end Add_RAS_Access_TSS; + + ---------------------- + -- Add_RAS_From_Any -- + ---------------------- + + procedure Add_RAS_From_Any (RAS_Type : Entity_Id) is + Loc : constant Source_Ptr := Sloc (RAS_Type); + + Fnam : constant Entity_Id := Make_Defining_Identifier (Loc, + Make_TSS_Name (RAS_Type, TSS_From_Any)); + + Func_Spec : Node_Id; + + Statements : List_Id; + + Any_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_A); + + begin + Statements := New_List ( + Make_Simple_Return_Statement (Loc, + Expression => + Make_Aggregate (Loc, + Component_Associations => New_List ( + Make_Component_Association (Loc, + Choices => New_List ( + Make_Identifier (Loc, Name_Ras)), + Expression => + PolyORB_Support.Helpers.Build_From_Any_Call ( + Underlying_RACW_Type (RAS_Type), + New_Occurrence_Of (Any_Parameter, Loc), + No_List)))))); + + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Any_Parameter, + Parameter_Type => New_Occurrence_Of (RTE (RE_Any), Loc))), + Result_Definition => New_Occurrence_Of (RAS_Type, Loc)); + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Func_Spec, + Declarations => No_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements))); + Set_TSS (RAS_Type, Fnam); + end Add_RAS_From_Any; - Target_Partition := - Make_Defining_Identifier (Loc, New_Internal_Name ('P')); + -------------------- + -- Add_RAS_To_Any -- + -------------------- - Append_To (Proc_Decls, - Make_Object_Declaration (Loc, - Defining_Identifier => Target_Partition, - Constant_Present => True, - Object_Definition => - New_Occurrence_Of (RTE (RE_Partition_ID), Loc), - Expression => - Unchecked_Convert_To (RTE (RE_Partition_ID), - Make_Selected_Component (Loc, - Prefix => - New_Occurrence_Of (Pointer, Loc), - Selector_Name => - Make_Identifier (Loc, Name_Origin))))); - - RPC_Receiver := - Make_Selected_Component (Loc, - Prefix => - New_Occurrence_Of (Pointer, Loc), - Selector_Name => - Make_Identifier (Loc, Name_Receiver)); - - Subprogram_Id := - Unchecked_Convert_To (RTE (RE_Subprogram_Id), - Make_Selected_Component (Loc, - Prefix => - New_Occurrence_Of (Pointer, Loc), - Selector_Name => - Make_Identifier (Loc, Name_Subp_Id))); - - -- A function is never asynchronous. A procedure may or may not be - -- asynchronous depending on whether a pragma Asynchronous applies - -- on it. Since a RAST may point onto various subprograms, this is - -- only known at runtime so both versions (synchronous and asynchronous) - -- must be built every times it is not a function. + procedure Add_RAS_To_Any (RAS_Type : Entity_Id) is + Loc : constant Source_Ptr := Sloc (RAS_Type); - if Is_Function then - Asynchronous := Empty; + Fnam : constant Entity_Id := Make_Defining_Identifier (Loc, + Make_TSS_Name (RAS_Type, TSS_To_Any)); - else - Asynchronous := - Make_Selected_Component (Loc, - Prefix => - New_Occurrence_Of (Pointer, Loc), - Selector_Name => - Make_Identifier (Loc, Name_Async)); + Decls : List_Id; + Statements : List_Id; - end if; + Func_Spec : Node_Id; - if Present (Parameter_Specifications (Type_Def)) then - Current_Parameter := First (Parameter_Specifications (Type_Def)); + Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('A')); + RAS_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('R')); + RACW_Parameter : constant Node_Id := + Make_Selected_Component (Loc, + Prefix => RAS_Parameter, + Selector_Name => Name_Ras); - while Current_Parameter /= Empty loop - Append_To (Param_Specs, - Make_Parameter_Specification (Loc, - Defining_Identifier => - Make_Defining_Identifier (Loc, - Chars => - Chars (Defining_Identifier (Current_Parameter))), - In_Present => In_Present (Current_Parameter), - Out_Present => Out_Present (Current_Parameter), - Parameter_Type => - New_Copy_Tree (Parameter_Type (Current_Parameter)), - Expression => - New_Copy_Tree (Expression (Current_Parameter)))); - - Append_To (Param_Assoc, - Make_Identifier (Loc, - Chars => Chars (Defining_Identifier (Current_Parameter)))); + begin + -- Object declarations - Next (Current_Parameter); - end loop; - end if; + Set_Etype (RACW_Parameter, Underlying_RACW_Type (RAS_Type)); + Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Any, + Object_Definition => New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + PolyORB_Support.Helpers.Build_To_Any_Call + (RACW_Parameter, No_List))); - Proc := - Make_Defining_Identifier (Loc, - Chars => Make_TSS_Name (Ras_Type, TSS_RAS_Dereference)); + Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Set_TC), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + PolyORB_Support.Helpers.Build_TypeCode_Call (Loc, + RAS_Type, Decls))), - if Is_Function then - Proc_Spec := + Make_Simple_Return_Statement (Loc, + Expression => New_Occurrence_Of (Any, Loc))); + + Func_Spec := Make_Function_Specification (Loc, - Defining_Unit_Name => Proc, - Parameter_Specifications => Param_Specs, - Subtype_Mark => + Defining_Unit_Name => Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => RAS_Parameter, + Parameter_Type => New_Occurrence_Of (RAS_Type, Loc))), + Result_Definition => New_Occurrence_Of (RTE (RE_Any), Loc)); + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Func_Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements))); + Set_TSS (RAS_Type, Fnam); + end Add_RAS_To_Any; + + ---------------------- + -- Add_RAS_TypeCode -- + ---------------------- + + procedure Add_RAS_TypeCode (RAS_Type : Entity_Id) is + Loc : constant Source_Ptr := Sloc (RAS_Type); + + Fnam : constant Entity_Id := Make_Defining_Identifier (Loc, + Make_TSS_Name (RAS_Type, TSS_TypeCode)); + + Func_Spec : Node_Id; + Decls : constant List_Id := New_List; + Name_String : String_Id; + Repo_Id_String : String_Id; + + begin + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Fnam, + Result_Definition => New_Occurrence_Of (RTE (RE_TypeCode), Loc)); + + PolyORB_Support.Helpers.Build_Name_And_Repository_Id + (RAS_Type, Name_Str => Name_String, Repo_Id_Str => Repo_Id_String); + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Func_Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List ( + Make_Simple_Return_Statement (Loc, + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_TC_Build), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (RTE (RE_TC_Object), Loc), + Make_Aggregate (Loc, + Expressions => + New_List ( + Make_Function_Call (Loc, + Name => + New_Occurrence_Of + (RTE (RE_TA_String), Loc), + Parameter_Associations => New_List ( + Make_String_Literal (Loc, Name_String))), + Make_Function_Call (Loc, + Name => + New_Occurrence_Of + (RTE (RE_TA_String), Loc), + Parameter_Associations => New_List ( + Make_String_Literal (Loc, + Strval => Repo_Id_String)))))))))))); + Set_TSS (RAS_Type, Fnam); + end Add_RAS_TypeCode; + + ----------------------------------------- + -- Add_Receiving_Stubs_To_Declarations -- + ----------------------------------------- + + procedure Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id; + Stmts : List_Id) + is + Loc : constant Source_Ptr := Sloc (Pkg_Spec); + + Pkg_RPC_Receiver : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('H')); + Pkg_RPC_Receiver_Object : Node_Id; + Pkg_RPC_Receiver_Body : Node_Id; + Pkg_RPC_Receiver_Decls : List_Id; + Pkg_RPC_Receiver_Statements : List_Id; + + Pkg_RPC_Receiver_Cases : constant List_Id := New_List; + -- A Pkg_RPC_Receiver is built to decode the request + + Request : Node_Id; + -- Request object received from neutral layer + + Subp_Id : Entity_Id; + -- Subprogram identifier as received from the neutral + -- distribution core. + + Subp_Index : Entity_Id; + -- Internal index as determined by matching either the method name + -- from the request structure, or the local subprogram address (in + -- case of a RAS). + + Is_Local : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('L')); + + Local_Address : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('A')); + -- Address of a local subprogram designated by a reference + -- corresponding to a RAS. + + Dispatch_On_Address : constant List_Id := New_List; + Dispatch_On_Name : constant List_Id := New_List; + + Current_Declaration : Node_Id; + Current_Stubs : Node_Id; + Current_Subprogram_Number : Int := First_RCI_Subprogram_Id; + + Subp_Info_Array : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('I')); + + Subp_Info_List : constant List_Id := New_List; + + Register_Pkg_Actuals : constant List_Id := New_List; + + All_Calls_Remote_E : Entity_Id; + + procedure Append_Stubs_To + (RPC_Receiver_Cases : List_Id; + Declaration : Node_Id; + Stubs : Node_Id; + Subp_Number : Int; + Subp_Dist_Name : Entity_Id; + Subp_Proxy_Addr : Entity_Id); + -- Add one case to the specified RPC receiver case list associating + -- Subprogram_Number with the subprogram declared by Declaration, for + -- which we have receiving stubs in Stubs. Subp_Number is an internal + -- subprogram index. Subp_Dist_Name is the string used to call the + -- subprogram by name, and Subp_Dist_Addr is the address of the proxy + -- object, used in the context of calls through remote + -- access-to-subprogram types. + + --------------------- + -- Append_Stubs_To -- + --------------------- + + procedure Append_Stubs_To + (RPC_Receiver_Cases : List_Id; + Declaration : Node_Id; + Stubs : Node_Id; + Subp_Number : Int; + Subp_Dist_Name : Entity_Id; + Subp_Proxy_Addr : Entity_Id) + is + Case_Stmts : List_Id; + begin + Case_Stmts := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + Defining_Entity (Stubs), Loc), + Parameter_Associations => + New_List (New_Occurrence_Of (Request, Loc)))); + + if Nkind (Specification (Declaration)) = N_Function_Specification + or else not + Is_Asynchronous (Defining_Entity (Specification (Declaration))) + then + Append_To (Case_Stmts, Make_Simple_Return_Statement (Loc)); + end if; + + Append_To (RPC_Receiver_Cases, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => + New_List (Make_Integer_Literal (Loc, Subp_Number)), + Statements => Case_Stmts)); + + Append_To (Dispatch_On_Name, + Make_Elsif_Part (Loc, + Condition => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Caseless_String_Eq), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Subp_Id, Loc), + New_Occurrence_Of (Subp_Dist_Name, Loc))), + + Then_Statements => New_List ( + Make_Assignment_Statement (Loc, + New_Occurrence_Of (Subp_Index, Loc), + Make_Integer_Literal (Loc, Subp_Number))))); + + Append_To (Dispatch_On_Address, + Make_Elsif_Part (Loc, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => New_Occurrence_Of (Local_Address, Loc), + Right_Opnd => New_Occurrence_Of (Subp_Proxy_Addr, Loc)), + + Then_Statements => New_List ( + Make_Assignment_Statement (Loc, + New_Occurrence_Of (Subp_Index, Loc), + Make_Integer_Literal (Loc, Subp_Number))))); + end Append_Stubs_To; + + -- Start of processing for Add_Receiving_Stubs_To_Declarations + + begin + -- Building receiving stubs consist in several operations: + + -- - a package RPC receiver must be built. This subprogram + -- will get a Subprogram_Id from the incoming stream + -- and will dispatch the call to the right subprogram; + + -- - a receiving stub for each subprogram visible in the package + -- spec. This stub will read all the parameters from the stream, + -- and put the result as well as the exception occurrence in the + -- output stream; + + -- - a dummy package with an empty spec and a body made of an + -- elaboration part, whose job is to register the receiving + -- part of this RCI package on the name server. This is done + -- by calling System.Partition_Interface.Register_Receiving_Stub. + + Build_RPC_Receiver_Body ( + RPC_Receiver => Pkg_RPC_Receiver, + Request => Request, + Subp_Id => Subp_Id, + Subp_Index => Subp_Index, + Stmts => Pkg_RPC_Receiver_Statements, + Decl => Pkg_RPC_Receiver_Body); + Pkg_RPC_Receiver_Decls := Declarations (Pkg_RPC_Receiver_Body); + + -- Extract local address information from the target reference: + -- if non-null, that means that this is a reference that denotes + -- one particular operation, and hence that the operation name + -- must not be taken into account for dispatching. + + Append_To (Pkg_RPC_Receiver_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Is_Local, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc))); + + Append_To (Pkg_RPC_Receiver_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Local_Address, + Object_Definition => + New_Occurrence_Of (RTE (RE_Address), Loc))); + + Append_To (Pkg_RPC_Receiver_Statements, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Get_Local_Address), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => Request, + Selector_Name => Name_Target), + New_Occurrence_Of (Is_Local, Loc), + New_Occurrence_Of (Local_Address, Loc)))); + + -- For each subprogram, the receiving stub will be built and a + -- case statement will be made on the Subprogram_Id to dispatch + -- to the right subprogram. + + All_Calls_Remote_E := Boolean_Literals ( + Has_All_Calls_Remote (Defining_Entity (Pkg_Spec))); + + Overload_Counter_Table.Reset; + Reserve_NamingContext_Methods; + + Current_Declaration := First (Visible_Declarations (Pkg_Spec)); + while Present (Current_Declaration) loop + if Nkind (Current_Declaration) = N_Subprogram_Declaration + and then Comes_From_Source (Current_Declaration) + then + declare + Loc : constant Source_Ptr := Sloc (Current_Declaration); + -- While specifically processing Current_Declaration, use + -- its Sloc as the location of all generated nodes. + + Subp_Def : constant Entity_Id := + Defining_Unit_Name + (Specification (Current_Declaration)); + + Subp_Val : String_Id; + + Subp_Dist_Name : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => + New_External_Name + (Related_Id => Chars (Subp_Def), + Suffix => 'D', + Suffix_Index => -1)); + + Proxy_Object_Addr : Entity_Id; + + begin + -- Build receiving stub + + Current_Stubs := + Build_Subprogram_Receiving_Stubs + (Vis_Decl => Current_Declaration, + Asynchronous => + Nkind (Specification (Current_Declaration)) = + N_Procedure_Specification + and then Is_Asynchronous (Subp_Def)); + + Append_To (Decls, Current_Stubs); + Analyze (Current_Stubs); + + -- Build RAS proxy + + Add_RAS_Proxy_And_Analyze (Decls, + Vis_Decl => Current_Declaration, + All_Calls_Remote_E => All_Calls_Remote_E, + Proxy_Object_Addr => Proxy_Object_Addr); + + -- Compute distribution identifier + + Assign_Subprogram_Identifier + (Subp_Def, + Current_Subprogram_Number, + Subp_Val); + + pragma Assert + (Current_Subprogram_Number = Get_Subprogram_Id (Subp_Def)); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Dist_Name, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (Standard_String, Loc), + Expression => + Make_String_Literal (Loc, Subp_Val))); + Analyze (Last (Decls)); + + -- Add subprogram descriptor (RCI_Subp_Info) to the + -- subprograms table for this receiver. The aggregate + -- below must be kept consistent with the declaration + -- of type RCI_Subp_Info in System.Partition_Interface. + + Append_To (Subp_Info_List, + Make_Component_Association (Loc, + Choices => New_List ( + Make_Integer_Literal (Loc, Current_Subprogram_Number)), + + Expression => + Make_Aggregate (Loc, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Subp_Dist_Name, Loc), + Attribute_Name => Name_Address), + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Subp_Dist_Name, Loc), + Attribute_Name => Name_Length), + + New_Occurrence_Of (Proxy_Object_Addr, Loc))))); + + Append_Stubs_To (Pkg_RPC_Receiver_Cases, + Declaration => Current_Declaration, + Stubs => Current_Stubs, + Subp_Number => Current_Subprogram_Number, + Subp_Dist_Name => Subp_Dist_Name, + Subp_Proxy_Addr => Proxy_Object_Addr); + end; + + Current_Subprogram_Number := Current_Subprogram_Number + 1; + end if; + + Next (Current_Declaration); + end loop; + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Info_Array, + Constant_Present => True, + Aliased_Present => True, + Object_Definition => + Make_Subtype_Indication (Loc, + Subtype_Mark => + New_Occurrence_Of (RTE (RE_RCI_Subp_Info_Array), Loc), + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + New_List ( + Make_Range (Loc, + Low_Bound => + Make_Integer_Literal (Loc, + Intval => First_RCI_Subprogram_Id), + High_Bound => + Make_Integer_Literal (Loc, + Intval => + First_RCI_Subprogram_Id + + List_Length (Subp_Info_List) - 1))))))); + + if Present (First (Subp_Info_List)) then + Set_Expression (Last (Decls), + Make_Aggregate (Loc, + Component_Associations => Subp_Info_List)); + + -- Generate the dispatch statement to determine the subprogram id + -- of the called subprogram. + + -- We first test whether the reference that was used to make the + -- call was the base RCI reference (in which case Local_Address is + -- zero, and the method identifier from the request must be used + -- to determine which subprogram is called) or a reference + -- identifying one particular subprogram (in which case + -- Local_Address is the address of that subprogram, and the + -- method name from the request is ignored). The latter occurs + -- for the case of a call through a remote access-to-subprogram. + + -- In each case, cascaded elsifs are used to determine the proper + -- subprogram index. Using hash tables might be more efficient. + + Append_To (Pkg_RPC_Receiver_Statements, + Make_Implicit_If_Statement (Pkg_Spec, + Condition => + Make_Op_Ne (Loc, + Left_Opnd => New_Occurrence_Of (Local_Address, Loc), + Right_Opnd => New_Occurrence_Of + (RTE (RE_Null_Address), Loc)), + + Then_Statements => New_List ( + Make_Implicit_If_Statement (Pkg_Spec, + Condition => New_Occurrence_Of (Standard_False, Loc), + Then_Statements => New_List ( + Make_Null_Statement (Loc)), + Elsif_Parts => Dispatch_On_Address)), + + Else_Statements => New_List ( + Make_Implicit_If_Statement (Pkg_Spec, + Condition => New_Occurrence_Of (Standard_False, Loc), + Then_Statements => New_List (Make_Null_Statement (Loc)), + Elsif_Parts => Dispatch_On_Name)))); + + else + -- For a degenerate RCI with no visible subprograms, + -- Subp_Info_List has zero length, and the declaration is for an + -- empty array, in which case no initialization aggregate must be + -- generated. We do not generate a Dispatch_Statement either. + + -- No initialization provided: remove CONSTANT so that the + -- declaration is not an incomplete deferred constant. + + Set_Constant_Present (Last (Decls), False); + end if; + + -- Analyze Subp_Info_Array declaration + + Analyze (Last (Decls)); + + -- If we receive an invalid Subprogram_Id, it is best to do nothing + -- rather than raising an exception since we do not want someone + -- to crash a remote partition by sending invalid subprogram ids. + -- This is consistent with the other parts of the case statement + -- since even in presence of incorrect parameters in the stream, + -- every exception will be caught and (if the subprogram is not an + -- APC) put into the result stream and sent away. + + Append_To (Pkg_RPC_Receiver_Cases, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => New_List (Make_Others_Choice (Loc)), + Statements => New_List (Make_Null_Statement (Loc)))); + + Append_To (Pkg_RPC_Receiver_Statements, + Make_Case_Statement (Loc, + Expression => New_Occurrence_Of (Subp_Index, Loc), + Alternatives => Pkg_RPC_Receiver_Cases)); + + -- Pkg_RPC_Receiver body is now complete: insert it into the tree and + -- analyze it. + + Append_To (Decls, Pkg_RPC_Receiver_Body); + Analyze (Last (Decls)); + + Pkg_RPC_Receiver_Object := + Make_Object_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, New_Internal_Name ('R')), + Aliased_Present => True, + Object_Definition => New_Occurrence_Of (RTE (RE_Servant), Loc)); + Append_To (Decls, Pkg_RPC_Receiver_Object); + Analyze (Last (Decls)); + + Get_Library_Unit_Name_String (Pkg_Spec); + + -- Name + + Append_To (Register_Pkg_Actuals, + Make_String_Literal (Loc, + Strval => String_From_Name_Buffer)); + + -- Version + + Append_To (Register_Pkg_Actuals, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of + (Defining_Entity (Pkg_Spec), Loc), + Attribute_Name => Name_Version)); + + -- Handler + + Append_To (Register_Pkg_Actuals, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Pkg_RPC_Receiver, Loc), + Attribute_Name => Name_Access)); + + -- Receiver + + Append_To (Register_Pkg_Actuals, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of ( - Entity (Subtype_Mark (Spec)), Loc)); + Defining_Identifier (Pkg_RPC_Receiver_Object), Loc), + Attribute_Name => Name_Access)); - Set_Ekind (Proc, E_Function); + -- Subp_Info - Set_Etype (Proc, - New_Occurrence_Of (Entity (Subtype_Mark (Spec)), Loc)); + Append_To (Register_Pkg_Actuals, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Subp_Info_Array, Loc), + Attribute_Name => Name_Address)); - else - Proc_Spec := - Make_Procedure_Specification (Loc, - Defining_Unit_Name => Proc, - Parameter_Specifications => Param_Specs); + -- Subp_Info_Len - Set_Ekind (Proc, E_Procedure); - Set_Etype (Proc, Standard_Void_Type); - end if; + Append_To (Register_Pkg_Actuals, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Subp_Info_Array, Loc), + Attribute_Name => Name_Length)); - -- Build the calling stubs for the dereference of the RAS - - Build_General_Calling_Stubs - (Decls => Inner_Decls, - Statements => Inner_Statements, - Target_Partition => Target_Partition, - RPC_Receiver => RPC_Receiver, - Subprogram_Id => Subprogram_Id, - Asynchronous => Asynchronous, - Is_Known_Non_Asynchronous => Is_Function, - Is_Function => Is_Function, - Spec => Proc_Spec, - Nod => N); - - Converted_Ras := - Unchecked_Convert_To (Ras_Type, - OK_Convert_To (RTE (RE_Address), - Make_Selected_Component (Loc, - Prefix => New_Occurrence_Of (Pointer, Loc), - Selector_Name => Make_Identifier (Loc, Name_Ras)))); + -- Is_All_Calls_Remote - if Is_Function then - Append_To (Direct_Statements, - Make_Return_Statement (Loc, - Expression => - Make_Function_Call (Loc, - Name => - Make_Explicit_Dereference (Loc, - Prefix => Converted_Ras), - Parameter_Associations => Param_Assoc))); + Append_To (Register_Pkg_Actuals, + New_Occurrence_Of (All_Calls_Remote_E, Loc)); - else - Append_To (Direct_Statements, + -- ??? + + Append_To (Stmts, Make_Procedure_Call_Statement (Loc, Name => - Make_Explicit_Dereference (Loc, - Prefix => Converted_Ras), - Parameter_Associations => Param_Assoc)); - end if; + New_Occurrence_Of (RTE (RE_Register_Pkg_Receiving_Stub), Loc), + Parameter_Associations => Register_Pkg_Actuals)); + Analyze (Last (Stmts)); + end Add_Receiving_Stubs_To_Declarations; + + --------------------------------- + -- Build_General_Calling_Stubs -- + --------------------------------- + + procedure Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target_Object : Node_Id; + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id) + is + Loc : constant Source_Ptr := Sloc (Nod); - Prepend_To (Param_Specs, - Make_Parameter_Specification (Loc, - Defining_Identifier => Pointer, - In_Present => True, - Parameter_Type => - New_Occurrence_Of (Fat_Type, Loc))); + Arguments : Node_Id; + -- Name of the named values list used to transmit parameters + -- to the remote package - Append_To (Proc_Statements, - Make_Implicit_If_Statement (N, - Condition => - Make_And_Then (Loc, - Left_Opnd => - Make_Op_Ne (Loc, - Left_Opnd => - Make_Selected_Component (Loc, - Prefix => New_Occurrence_Of (Pointer, Loc), - Selector_Name => Make_Identifier (Loc, Name_Ras)), - Right_Opnd => - Make_Integer_Literal (Loc, Uint_0)), - - Right_Opnd => - Make_Op_Eq (Loc, - Left_Opnd => - New_Occurrence_Of (Target_Partition, Loc), - Right_Opnd => - Make_Function_Call (Loc, - New_Occurrence_Of ( - RTE (RE_Get_Local_Partition_Id), Loc)))), + Request : Node_Id; + -- The request object constructed by these stubs - Then_Statements => - Direct_Statements, + Result : Node_Id; + -- Name of the result named value (in non-APC cases) which get the + -- result of the remote subprogram. - Else_Statements => New_List ( - Make_Block_Statement (Loc, - Declarations => Inner_Decls, - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, - Statements => Inner_Statements))))); + Result_TC : Node_Id; + -- Typecode expression for the result of the request (void + -- typecode for procedures). + + Exception_Return_Parameter : Node_Id; + -- Name of the parameter which will hold the exception sent by the + -- remote subprogram. + + Current_Parameter : Node_Id; + -- Current parameter being handled + + Ordered_Parameters_List : constant List_Id := + Build_Ordered_Parameters_List (Spec); + + Asynchronous_P : Node_Id; + -- A Boolean expression indicating whether this call is asynchronous + + Asynchronous_Statements : List_Id := No_List; + Non_Asynchronous_Statements : List_Id := No_List; + -- Statements specifics to the Asynchronous/Non-Asynchronous cases + + Extra_Formal_Statements : constant List_Id := New_List; + -- List of statements for extra formal parameters. It will appear + -- after the regular statements for writing out parameters. + + After_Statements : constant List_Id := New_List; + -- Statements to be executed after call returns (to assign + -- in out or out parameter values). + + Etyp : Entity_Id; + -- The type of the formal parameter being processed + + Is_Controlling_Formal : Boolean; + Is_First_Controlling_Formal : Boolean; + First_Controlling_Formal_Seen : Boolean := False; + -- Controlling formal parameters of distributed object primitives + -- require special handling, and the first such parameter needs even + -- more special handling. + + begin + -- ??? document general form of stub subprograms for the PolyORB case + Request := Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Request, + Aliased_Present => False, + Object_Definition => + New_Occurrence_Of (RTE (RE_Request_Access), Loc))); + + Result := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('R')); + + if Is_Function then + Result_TC := + PolyORB_Support.Helpers.Build_TypeCode_Call + (Loc, Etype (Result_Definition (Spec)), Decls); + else + Result_TC := New_Occurrence_Of (RTE (RE_TC_Void), Loc); + end if; + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Result, + Aliased_Present => False, + Object_Definition => + New_Occurrence_Of (RTE (RE_NamedValue), Loc), + Expression => + Make_Aggregate (Loc, + Component_Associations => New_List ( + Make_Component_Association (Loc, + Choices => New_List (Make_Identifier (Loc, Name_Name)), + Expression => + New_Occurrence_Of (RTE (RE_Result_Name), Loc)), + Make_Component_Association (Loc, + Choices => New_List ( + Make_Identifier (Loc, Name_Argument)), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List (Result_TC))), + Make_Component_Association (Loc, + Choices => New_List ( + Make_Identifier (Loc, Name_Arg_Modes)), + Expression => Make_Integer_Literal (Loc, 0)))))); + + if not Is_Known_Asynchronous then + Exception_Return_Parameter := + Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Exception_Return_Parameter, + Object_Definition => + New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc))); + + else + Exception_Return_Parameter := Empty; + end if; + + -- Initialize and fill in arguments list + + Arguments := + Make_Defining_Identifier (Loc, New_Internal_Name ('A')); + Declare_Create_NVList (Loc, Arguments, Decls, Statements); + + Current_Parameter := First (Ordered_Parameters_List); + while Present (Current_Parameter) loop + if Is_RACW_Controlling_Formal (Current_Parameter, Stub_Type) then + Is_Controlling_Formal := True; + Is_First_Controlling_Formal := + not First_Controlling_Formal_Seen; + First_Controlling_Formal_Seen := True; + + else + Is_Controlling_Formal := False; + Is_First_Controlling_Formal := False; + end if; + + if Is_Controlling_Formal then + + -- For a controlling formal argument, we send its reference + + Etyp := RACW_Type; + + else + Etyp := Etype (Parameter_Type (Current_Parameter)); + end if; + + -- The first controlling formal parameter is treated specially: + -- it is used to set the target object of the call. + + if not Is_First_Controlling_Formal then + declare + Constrained : constant Boolean := + Is_Constrained (Etyp) + or else Is_Elementary_Type (Etyp); + + Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('A')); + + Actual_Parameter : Node_Id := + New_Occurrence_Of ( + Defining_Identifier ( + Current_Parameter), Loc); + + Expr : Node_Id; + + begin + if Is_Controlling_Formal then + + -- For a controlling formal parameter (other than the + -- first one), use the corresponding RACW. If the + -- parameter is not an anonymous access parameter, that + -- involves taking its 'Unrestricted_Access. + + if Nkind (Parameter_Type (Current_Parameter)) + = N_Access_Definition + then + Actual_Parameter := OK_Convert_To + (Etyp, Actual_Parameter); + else + Actual_Parameter := OK_Convert_To (Etyp, + Make_Attribute_Reference (Loc, + Prefix => Actual_Parameter, + Attribute_Name => Name_Unrestricted_Access)); + end if; + + end if; + + if In_Present (Current_Parameter) + or else not Out_Present (Current_Parameter) + or else not Constrained + or else Is_Controlling_Formal + then + -- The parameter has an input value, is constrained at + -- runtime by an input value, or is a controlling formal + -- parameter (always passed as a reference) other than + -- the first one. + + Expr := PolyORB_Support.Helpers.Build_To_Any_Call + (Actual_Parameter, Decls); + + else + Expr := Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + PolyORB_Support.Helpers.Build_TypeCode_Call + (Loc, Etyp, Decls))); + end if; + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Any, + Aliased_Present => False, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => Expr)); + + Append_To (Statements, + Add_Parameter_To_NVList (Loc, + Parameter => Current_Parameter, + NVList => Arguments, + Constrained => Constrained, + Any => Any)); + + if Out_Present (Current_Parameter) + and then not Is_Controlling_Formal + then + Append_To (After_Statements, + Make_Assignment_Statement (Loc, + Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Expression => + PolyORB_Support.Helpers.Build_From_Any_Call + (Etype (Parameter_Type (Current_Parameter)), + New_Occurrence_Of (Any, Loc), + Decls))); + + end if; + end; + end if; + + -- If the current parameter has a dynamic constrained status, then + -- this status is transmitted as well. + -- This should be done for accessibility as well ??? + + if Nkind (Parameter_Type (Current_Parameter)) /= + N_Access_Definition + and then Need_Extra_Constrained (Current_Parameter) + then + -- In this block, we do not use the extra formal that has been + -- created because it does not exist at the time of expansion + -- when building calling stubs for remote access to subprogram + -- types. We create an extra variable of this type and push it + -- in the stream after the regular parameters. - Discard_Node ( - Make_Subprogram_Body (Loc, - Specification => Proc_Spec, - Declarations => Proc_Decls, - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, - Statements => Proc_Statements))); + declare + Extra_Any_Parameter : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('P')); - Set_TSS (Fat_Type, Defining_Unit_Name (Proc_Spec)); + Parameter_Exp : constant Node_Id := + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Attribute_Name => Name_Constrained); - end Add_RAS_Dereference_Attribute; + begin + Set_Etype (Parameter_Exp, Etype (Standard_Boolean)); - ----------------------- - -- Add_RAST_Features -- - ----------------------- + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Extra_Any_Parameter, + Aliased_Present => False, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + PolyORB_Support.Helpers.Build_To_Any_Call + (Parameter_Exp, Decls))); - procedure Add_RAST_Features (Vis_Decl : Node_Id) is - begin - -- Do not add attributes more than once in any case. This should - -- be replaced by an assert or this comment removed if we decide - -- that this is normal to be called several times ??? + Append_To (Extra_Formal_Statements, + Add_Parameter_To_NVList (Loc, + Parameter => Extra_Any_Parameter, + NVList => Arguments, + Constrained => True, + Any => Extra_Any_Parameter)); + end; + end if; - if Present (TSS (Equivalent_Type (Defining_Identifier (Vis_Decl)), - TSS_RAS_Access)) - then - return; - end if; + Next (Current_Parameter); + end loop; - Add_RAS_Dereference_Attribute (Vis_Decl); - Add_RAS_Access_Attribute (Vis_Decl); - end Add_RAST_Features; + -- Append the formal statements list to the statements - ----------------------------------------- - -- Add_Receiving_Stubs_To_Declarations -- - ----------------------------------------- + Append_List_To (Statements, Extra_Formal_Statements); - procedure Add_Receiving_Stubs_To_Declarations - (Pkg_Spec : in Node_Id; - Decls : in List_Id) - is - Loc : constant Source_Ptr := Sloc (Pkg_Spec); + Append_To (Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Request_Create), Loc), - Stream_Parameter : Node_Id; - Result_Parameter : Node_Id; + Parameter_Associations => New_List ( + Target_Object, + Subprogram_Id, + New_Occurrence_Of (Arguments, Loc), + New_Occurrence_Of (Result, Loc), + New_Occurrence_Of (RTE (RE_Nil_Exc_List), Loc)))); - Pkg_RPC_Receiver : Node_Id; - Pkg_RPC_Receiver_Spec : Node_Id; - Pkg_RPC_Receiver_Decls : List_Id; - Pkg_RPC_Receiver_Statements : List_Id; - Pkg_RPC_Receiver_Cases : constant List_Id := New_List; - Pkg_RPC_Receiver_Body : Node_Id; - -- A Pkg_RPC_Receiver is built to decode the request + Append_To (Parameter_Associations (Last (Statements)), + New_Occurrence_Of (Request, Loc)); - Subp_Id : Node_Id; - -- Subprogram_Id as read from the incoming stream + pragma Assert + (not (Is_Known_Non_Asynchronous and Is_Known_Asynchronous)); - Current_Declaration : Node_Id; - Current_Subprogram_Number : Int := 0; - Current_Stubs : Node_Id; + if Is_Known_Non_Asynchronous or Is_Known_Asynchronous then + Asynchronous_P := + New_Occurrence_Of + (Boolean_Literals (Is_Known_Asynchronous), Loc); - Actuals : List_Id; + else + pragma Assert (Present (Asynchronous)); + Asynchronous_P := New_Copy_Tree (Asynchronous); - Dummy_Register_Name : Name_Id; - Dummy_Register_Spec : Node_Id; - Dummy_Register_Decl : Node_Id; - Dummy_Register_Body : Node_Id; + -- The expression node Asynchronous will be used to build an 'if' + -- statement at the end of Build_General_Calling_Stubs: we need to + -- make a copy here. + end if; - begin - -- Building receiving stubs consist in several operations: - - -- - a package RPC receiver must be built. This subprogram - -- will get a Subprogram_Id from the incoming stream - -- and will dispatch the call to the right subprogram - - -- - a receiving stub for any subprogram visible in the package - -- spec. This stub will read all the parameters from the stream, - -- and put the result as well as the exception occurrence in the - -- output stream - - -- - a dummy package with an empty spec and a body made of an - -- elaboration part, whose job is to register the receiving - -- part of this RCI package on the name server. This is done - -- by calling System.Partition_Interface.Register_Receiving_Stub - - Stream_Parameter := - Make_Defining_Identifier (Loc, New_Internal_Name ('S')); - Result_Parameter := - Make_Defining_Identifier (Loc, New_Internal_Name ('R')); - Subp_Id := - Make_Defining_Identifier (Loc, New_Internal_Name ('P')); - - Pkg_RPC_Receiver := - Make_Defining_Identifier (Loc, New_Internal_Name ('P')); - - -- The parameters of the package RPC receiver are made of two - -- streams, an input one and an output one. - - Pkg_RPC_Receiver_Spec := - Build_RPC_Receiver_Specification - (RPC_Receiver => Pkg_RPC_Receiver, - Stream_Parameter => Stream_Parameter, - Result_Parameter => Result_Parameter); - - Pkg_RPC_Receiver_Decls := New_List ( - Make_Object_Declaration (Loc, - Defining_Identifier => Subp_Id, - Object_Definition => - New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc))); + Append_To (Parameter_Associations (Last (Statements)), + Make_Indexed_Component (Loc, + Prefix => + New_Occurrence_Of ( + RTE (RE_Asynchronous_P_To_Sync_Scope), Loc), + Expressions => New_List (Asynchronous_P))); - Pkg_RPC_Receiver_Statements := New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), - Attribute_Name => - Name_Read, - Expressions => New_List ( - New_Occurrence_Of (Stream_Parameter, Loc), - New_Occurrence_Of (Subp_Id, Loc)))); + Append_To (Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Request_Invoke), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request, Loc)))); - -- For each subprogram, the receiving stub will be built and a - -- case statement will be made on the Subprogram_Id to dispatch - -- to the right subprogram. + Non_Asynchronous_Statements := New_List (Make_Null_Statement (Loc)); + Asynchronous_Statements := New_List (Make_Null_Statement (Loc)); - Current_Declaration := First (Visible_Declarations (Pkg_Spec)); + if not Is_Known_Asynchronous then - while Current_Declaration /= Empty loop + -- Reraise an exception occurrence from the completed request. + -- If the exception occurrence is empty, this is a no-op. - if Nkind (Current_Declaration) = N_Subprogram_Declaration - and then Comes_From_Source (Current_Declaration) - then - pragma Assert (Current_Subprogram_Number = - Get_Subprogram_Id (Defining_Unit_Name (Specification ( - Current_Declaration)))); + Append_To (Non_Asynchronous_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Request_Raise_Occurrence), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request, Loc)))); + + if Is_Function then + + -- If this is a function call, read the value and return it + + Append_To (Non_Asynchronous_Statements, + Make_Tag_Check (Loc, + Make_Simple_Return_Statement (Loc, + PolyORB_Support.Helpers.Build_From_Any_Call + (Etype (Result_Definition (Spec)), + Make_Selected_Component (Loc, + Prefix => Result, + Selector_Name => Name_Argument), + Decls)))); + end if; + end if; - Current_Stubs := - Build_Subprogram_Receiving_Stubs - (Vis_Decl => Current_Declaration, - Asynchronous => - Nkind (Specification (Current_Declaration)) = - N_Procedure_Specification - and then Is_Asynchronous - (Defining_Unit_Name (Specification - (Current_Declaration)))); + Append_List_To (Non_Asynchronous_Statements, After_Statements); - Append_To (Decls, Current_Stubs); + if Is_Known_Asynchronous then + Append_List_To (Statements, Asynchronous_Statements); - Analyze (Current_Stubs); + elsif Is_Known_Non_Asynchronous then + Append_List_To (Statements, Non_Asynchronous_Statements); - Actuals := New_List (New_Occurrence_Of (Stream_Parameter, Loc)); + else + pragma Assert (Present (Asynchronous)); + Append_To (Statements, + Make_Implicit_If_Statement (Nod, + Condition => Asynchronous, + Then_Statements => Asynchronous_Statements, + Else_Statements => Non_Asynchronous_Statements)); + end if; + end Build_General_Calling_Stubs; - if Nkind (Specification (Current_Declaration)) - = N_Function_Specification - or else - not Is_Asynchronous ( - Defining_Entity (Specification (Current_Declaration))) - then - -- An asynchronous procedure does not want an output parameter - -- since no result and no exception will ever be returned. + ----------------------- + -- Build_Stub_Target -- + ----------------------- - Append_To (Actuals, - New_Occurrence_Of (Result_Parameter, Loc)); + function Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target + is + Target_Info : RPC_Target (PCS_Kind => Name_PolyORB_DSA); + Target_Reference : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('T')); + begin + if Present (Controlling_Parameter) then + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Target_Reference, - end if; + Object_Definition => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc), - Append_To (Pkg_RPC_Receiver_Cases, - Make_Case_Statement_Alternative (Loc, - Discrete_Choices => - New_List ( - Make_Integer_Literal (Loc, Current_Subprogram_Number)), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Make_Ref), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => Controlling_Parameter, + Selector_Name => Name_Target))))); - Statements => - New_List ( - Make_Procedure_Call_Statement (Loc, - Name => - New_Occurrence_Of ( - Defining_Entity (Current_Stubs), Loc), - Parameter_Associations => - Actuals)))); + -- Note: Controlling_Parameter has the same components as + -- System.Partition_Interface.RACW_Stub_Type. - Current_Subprogram_Number := Current_Subprogram_Number + 1; + Target_Info.Object := New_Occurrence_Of (Target_Reference, Loc); + + else + Target_Info.Object := + Make_Selected_Component (Loc, + Prefix => Make_Identifier (Loc, Chars (RCI_Locator)), + Selector_Name => + Make_Identifier (Loc, Name_Get_RCI_Package_Ref)); end if; - Next (Current_Declaration); - end loop; + return Target_Info; + end Build_Stub_Target; - -- If we receive an invalid Subprogram_Id, it is best to do nothing - -- rather than raising an exception since we do not want someone - -- to crash a remote partition by sending invalid subprogram ids. - -- This is consistent with the other parts of the case statement - -- since even in presence of incorrect parameters in the stream, - -- every exception will be caught and (if the subprogram is not an - -- APC) put into the result stream and sent away. - - Append_To (Pkg_RPC_Receiver_Cases, - Make_Case_Statement_Alternative (Loc, - Discrete_Choices => - New_List (Make_Others_Choice (Loc)), - Statements => - New_List (Make_Null_Statement (Loc)))); - - Append_To (Pkg_RPC_Receiver_Statements, - Make_Case_Statement (Loc, - Expression => - New_Occurrence_Of (Subp_Id, Loc), - Alternatives => Pkg_RPC_Receiver_Cases)); - - Pkg_RPC_Receiver_Body := - Make_Subprogram_Body (Loc, - Specification => Pkg_RPC_Receiver_Spec, - Declarations => Pkg_RPC_Receiver_Decls, - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, - Statements => Pkg_RPC_Receiver_Statements)); + --------------------- + -- Build_Stub_Type -- + --------------------- - Append_To (Decls, Pkg_RPC_Receiver_Body); - Analyze (Pkg_RPC_Receiver_Body); + procedure Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id) + is + Loc : constant Source_Ptr := Sloc (Stub_Type); + pragma Warnings (Off); + pragma Unreferenced (RACW_Type); + pragma Warnings (On); - -- Construction of the dummy package used to register the package - -- receiving stubs on the nameserver. + begin + Stub_Type_Decl := + Make_Full_Type_Declaration (Loc, + Defining_Identifier => Stub_Type, + Type_Definition => + Make_Record_Definition (Loc, + Tagged_Present => True, + Limited_Present => True, + Component_List => + Make_Component_List (Loc, + Component_Items => New_List ( + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Target), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of (RTE (RE_Entity_Ptr), Loc))), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Asynchronous), + + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of (Standard_Boolean, Loc))))))); + + RPC_Receiver_Decl := + Make_Object_Declaration (Loc, + Defining_Identifier => Make_Defining_Identifier (Loc, + New_Internal_Name ('R')), + Aliased_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Servant), Loc)); + end Build_Stub_Type; + + ----------------------------- + -- Build_RPC_Receiver_Body -- + ----------------------------- + + procedure Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id) + is + Loc : constant Source_Ptr := Sloc (RPC_Receiver); - Dummy_Register_Name := New_Internal_Name ('P'); + RPC_Receiver_Spec : Node_Id; + RPC_Receiver_Decls : List_Id; - Dummy_Register_Spec := - Make_Package_Specification (Loc, - Defining_Unit_Name => - Make_Defining_Identifier (Loc, Dummy_Register_Name), - Visible_Declarations => No_List, - End_Label => Empty); + begin + Request := Make_Defining_Identifier (Loc, Name_R); - Dummy_Register_Decl := - Make_Package_Declaration (Loc, - Specification => Dummy_Register_Spec); + RPC_Receiver_Spec := + Build_RPC_Receiver_Specification ( + RPC_Receiver => RPC_Receiver, + Request_Parameter => Request); - Append_To (Decls, - Dummy_Register_Decl); - Analyze (Dummy_Register_Decl); + Subp_Id := Make_Defining_Identifier (Loc, Name_P); + Subp_Index := Make_Defining_Identifier (Loc, Name_I); - Dummy_Register_Body := - Make_Package_Body (Loc, - Defining_Unit_Name => - Make_Defining_Identifier (Loc, Dummy_Register_Name), - Declarations => No_List, + RPC_Receiver_Decls := New_List ( + Make_Object_Renaming_Declaration (Loc, + Defining_Identifier => Subp_Id, + Subtype_Mark => New_Occurrence_Of (Standard_String, Loc), + Name => + Make_Explicit_Dereference (Loc, + Prefix => + Make_Selected_Component (Loc, + Prefix => Request, + Selector_Name => Name_Operation))), - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, - Statements => New_List ( - Make_Procedure_Call_Statement (Loc, - Name => - New_Occurrence_Of (RTE (RE_Register_Receiving_Stub), Loc), - - Parameter_Associations => New_List ( - Make_String_Literal (Loc, - Strval => Get_Pkg_Name_String_Id (Pkg_Spec)), - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Pkg_RPC_Receiver, Loc), - Attribute_Name => - Name_Unrestricted_Access), - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Defining_Entity (Pkg_Spec), Loc), - Attribute_Name => - Name_Version)))))); + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Index, + Object_Definition => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), + Attribute_Name => Name_Last))); - Append_To (Decls, Dummy_Register_Body); - Analyze (Dummy_Register_Body); - end Add_Receiving_Stubs_To_Declarations; + Stmts := New_List; - ------------------- - -- Add_Stub_Type -- - ------------------- + Decl := + Make_Subprogram_Body (Loc, + Specification => RPC_Receiver_Spec, + Declarations => RPC_Receiver_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stmts)); + end Build_RPC_Receiver_Body; + + -------------------------------------- + -- Build_Subprogram_Receiving_Stubs -- + -------------------------------------- + + function Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id + is + Loc : constant Source_Ptr := Sloc (Vis_Decl); - procedure Add_Stub_Type - (Designated_Type : in Entity_Id; - RACW_Type : in Entity_Id; - Decls : in List_Id; - Stub_Type : out Entity_Id; - Stub_Type_Access : out Entity_Id; - Object_RPC_Receiver : out Entity_Id; - Existing : out Boolean) - is - Loc : constant Source_Ptr := Sloc (RACW_Type); + Request_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('R')); + -- Formal parameter for receiving stubs: a descriptor for an incoming + -- request. - Stub_Elements : constant Stub_Structure := - Stubs_Table.Get (Designated_Type); + Outer_Decls : constant List_Id := New_List; + -- At the outermost level, an NVList and Any's are declared for all + -- parameters. The Dynamic_Async flag also needs to be declared there + -- to be visible from the exception handling code. - Stub_Type_Declaration : Node_Id; - Stub_Type_Access_Declaration : Node_Id; - Object_RPC_Receiver_Declaration : Node_Id; + Outer_Statements : constant List_Id := New_List; + -- Statements that occur prior to the declaration of the actual + -- parameter variables. - RPC_Receiver_Stream : Entity_Id; - RPC_Receiver_Result : Entity_Id; + Outer_Extra_Formal_Statements : constant List_Id := New_List; + -- Statements concerning extra formal parameters, prior to the + -- declaration of the actual parameter variables. - begin - if Stub_Elements /= Empty_Stub_Structure then - Stub_Type := Stub_Elements.Stub_Type; - Stub_Type_Access := Stub_Elements.Stub_Type_Access; - Object_RPC_Receiver := Stub_Elements.Object_RPC_Receiver; - Existing := True; - return; - end if; + Decls : constant List_Id := New_List; + -- All the parameters will get declared before calling the real + -- subprograms. Also the out parameters will be declared. + -- At this level, parameters may be unconstrained. - Existing := False; - Stub_Type := - Make_Defining_Identifier (Loc, New_Internal_Name ('S')); - Stub_Type_Access := - Make_Defining_Identifier (Loc, New_Internal_Name ('S')); - Object_RPC_Receiver := - Make_Defining_Identifier (Loc, New_Internal_Name ('P')); - RPC_Receiver_Stream := - Make_Defining_Identifier (Loc, New_Internal_Name ('S')); - RPC_Receiver_Result := - Make_Defining_Identifier (Loc, New_Internal_Name ('S')); - Stubs_Table.Set (Designated_Type, - (Stub_Type => Stub_Type, - Stub_Type_Access => Stub_Type_Access, - Object_RPC_Receiver => Object_RPC_Receiver, - RPC_Receiver_Stream => RPC_Receiver_Stream, - RPC_Receiver_Result => RPC_Receiver_Result, - RACW_Type => RACW_Type)); + Statements : constant List_Id := New_List; - -- The stub type definition below must match exactly the one in - -- s-parint.ads, since unchecked conversions will be used in - -- s-parint.adb to modify pointers passed to Get_Unique_Remote_Pointer. + After_Statements : constant List_Id := New_List; + -- Statements to be executed after the subprogram call - Stub_Type_Declaration := - Make_Full_Type_Declaration (Loc, - Defining_Identifier => Stub_Type, - Type_Definition => - Make_Record_Definition (Loc, - Tagged_Present => True, - Limited_Present => True, - Component_List => - Make_Component_List (Loc, - Component_Items => New_List ( - - Make_Component_Declaration (Loc, - Defining_Identifier => - Make_Defining_Identifier (Loc, Name_Origin), - Component_Definition => - Make_Component_Definition (Loc, - Aliased_Present => False, - Subtype_Indication => - New_Occurrence_Of (RTE (RE_Partition_ID), Loc))), - - Make_Component_Declaration (Loc, - Defining_Identifier => - Make_Defining_Identifier (Loc, Name_Receiver), - Component_Definition => - Make_Component_Definition (Loc, - Aliased_Present => False, - Subtype_Indication => - New_Occurrence_Of (RTE (RE_Unsigned_64), Loc))), - - Make_Component_Declaration (Loc, - Defining_Identifier => - Make_Defining_Identifier (Loc, Name_Addr), - Component_Definition => - Make_Component_Definition (Loc, - Aliased_Present => False, - Subtype_Indication => - New_Occurrence_Of (RTE (RE_Unsigned_64), Loc))), - - Make_Component_Declaration (Loc, - Defining_Identifier => - Make_Defining_Identifier (Loc, Name_Asynchronous), - Component_Definition => - Make_Component_Definition (Loc, - Aliased_Present => False, - Subtype_Indication => - New_Occurrence_Of (Standard_Boolean, Loc))))))); + Inner_Decls : List_Id := No_List; + -- In case of a function, the inner declarations are needed since + -- the result may be unconstrained. - Append_To (Decls, Stub_Type_Declaration); - Analyze (Stub_Type_Declaration); + Excep_Handlers : List_Id := No_List; - -- This is in no way a type derivation, but we fake it to make - -- sure that the dispatching table gets built with the corresponding - -- primitive operations at the right place. + Parameter_List : constant List_Id := New_List; + -- List of parameters to be passed to the subprogram - Derive_Subprograms (Parent_Type => Designated_Type, - Derived_Type => Stub_Type); + First_Controlling_Formal_Seen : Boolean := False; - Stub_Type_Access_Declaration := - Make_Full_Type_Declaration (Loc, - Defining_Identifier => Stub_Type_Access, - Type_Definition => - Make_Access_To_Object_Definition (Loc, - Subtype_Indication => New_Occurrence_Of (Stub_Type, Loc))); + Current_Parameter : Node_Id; - Append_To (Decls, Stub_Type_Access_Declaration); - Analyze (Stub_Type_Access_Declaration); + Ordered_Parameters_List : constant List_Id := + Build_Ordered_Parameters_List + (Specification (Vis_Decl)); - Object_RPC_Receiver_Declaration := - Make_Subprogram_Declaration (Loc, - Build_RPC_Receiver_Specification ( - RPC_Receiver => Object_RPC_Receiver, - Stream_Parameter => RPC_Receiver_Stream, - Result_Parameter => RPC_Receiver_Result)); + Arguments : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('A')); + -- Name of the named values list used to retrieve parameters - Append_To (Decls, Object_RPC_Receiver_Declaration); - end Add_Stub_Type; + Subp_Spec : Node_Id; + -- Subprogram specification - --------------------------------- - -- Build_General_Calling_Stubs -- - --------------------------------- + Called_Subprogram : Node_Id; + -- The subprogram to call - procedure Build_General_Calling_Stubs - (Decls : List_Id; - Statements : List_Id; - Target_Partition : Entity_Id; - RPC_Receiver : Node_Id; - Subprogram_Id : Node_Id; - Asynchronous : Node_Id := Empty; - Is_Known_Asynchronous : Boolean := False; - Is_Known_Non_Asynchronous : Boolean := False; - Is_Function : Boolean; - Spec : Node_Id; - Object_Type : Entity_Id := Empty; - Nod : Node_Id) - is - Loc : constant Source_Ptr := Sloc (Nod); + begin + if Present (RACW_Type) then + Called_Subprogram := + New_Occurrence_Of (Parent_Primitive, Loc); + else + Called_Subprogram := + New_Occurrence_Of + (Defining_Unit_Name (Specification (Vis_Decl)), Loc); + end if; - Stream_Parameter : Node_Id; - -- Name of the stream used to transmit parameters to the remote package + Declare_Create_NVList (Loc, Arguments, Outer_Decls, Outer_Statements); - Result_Parameter : Node_Id; - -- Name of the result parameter (in non-APC cases) which get the - -- result of the remote subprogram. + -- Loop through every parameter and get its value from the stream. If + -- the parameter is unconstrained, then the parameter is read using + -- 'Input at the point of declaration. - Exception_Return_Parameter : Node_Id; - -- Name of the parameter which will hold the exception sent by the - -- remote subprogram. + Current_Parameter := First (Ordered_Parameters_List); + while Present (Current_Parameter) loop + declare + Etyp : Entity_Id; + Constrained : Boolean; + Any : Entity_Id := Empty; + Object : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('P')); + Expr : Node_Id := Empty; - Current_Parameter : Node_Id; - -- Current parameter being handled + Is_Controlling_Formal : constant Boolean := + Is_RACW_Controlling_Formal + (Current_Parameter, Stub_Type); - Ordered_Parameters_List : constant List_Id := - Build_Ordered_Parameters_List (Spec); + Is_First_Controlling_Formal : Boolean := False; - Asynchronous_Statements : List_Id := No_List; - Non_Asynchronous_Statements : List_Id := No_List; - -- Statements specifics to the Asynchronous/Non-Asynchronous cases. + Need_Extra_Constrained : Boolean; + -- True when an extra constrained actual is required - Extra_Formal_Statements : constant List_Id := New_List; - -- List of statements for extra formal parameters. It will appear after - -- the regular statements for writing out parameters. + begin + if Is_Controlling_Formal then - begin - -- The general form of a calling stub for a given subprogram is: - - -- procedure X (...) is - -- P : constant Partition_ID := RCI_Cache.Get_Active_Partition_ID; - -- Stream, Result : aliased System.RPC.Params_Stream_Type (0); - -- begin - -- Put_Package_RPC_Receiver_In_Stream; (the package RPC receiver - -- comes from RCI_Cache.Get_RCI_Package_Receiver) - -- Put_Subprogram_Id_In_Stream; - -- Put_Parameters_In_Stream; - -- Do_RPC (Stream, Result); - -- Read_Exception_Occurrence_From_Result; Raise_It; - -- Read_Out_Parameters_And_Function_Return_From_Stream; - -- end X; - - -- There are some variations: Do_APC is called for an asynchronous - -- procedure and the part after the call is completely ommitted - -- as well as the declaration of Result. For a function call, - -- 'Input is always used to read the result even if it is constrained. - - Stream_Parameter := - Make_Defining_Identifier (Loc, New_Internal_Name ('S')); + -- Controlling formals in distributed object primitive + -- operations are handled specially: + -- - the first controlling formal is used as the + -- target of the call; + -- - the remaining controlling formals are transmitted + -- as RACWs. - Append_To (Decls, - Make_Object_Declaration (Loc, - Defining_Identifier => Stream_Parameter, - Aliased_Present => True, - Object_Definition => - Make_Subtype_Indication (Loc, - Subtype_Mark => - New_Occurrence_Of (RTE (RE_Params_Stream_Type), Loc), - Constraint => - Make_Index_Or_Discriminant_Constraint (Loc, - Constraints => - New_List (Make_Integer_Literal (Loc, 0)))))); - - if not Is_Known_Asynchronous then - Result_Parameter := - Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + Etyp := RACW_Type; + Is_First_Controlling_Formal := + not First_Controlling_Formal_Seen; + First_Controlling_Formal_Seen := True; - Append_To (Decls, - Make_Object_Declaration (Loc, - Defining_Identifier => Result_Parameter, - Aliased_Present => True, - Object_Definition => - Make_Subtype_Indication (Loc, - Subtype_Mark => - New_Occurrence_Of (RTE (RE_Params_Stream_Type), Loc), - Constraint => - Make_Index_Or_Discriminant_Constraint (Loc, - Constraints => - New_List (Make_Integer_Literal (Loc, 0)))))); + else + Etyp := Etype (Parameter_Type (Current_Parameter)); + end if; - Exception_Return_Parameter := - Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + Constrained := + Is_Constrained (Etyp) or else Is_Elementary_Type (Etyp); - Append_To (Decls, - Make_Object_Declaration (Loc, - Defining_Identifier => Exception_Return_Parameter, - Object_Definition => - New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc))); + if not Is_First_Controlling_Formal then + Any := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('A')); - else - Result_Parameter := Empty; - Exception_Return_Parameter := Empty; - end if; + Append_To (Outer_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + PolyORB_Support.Helpers.Build_TypeCode_Call + (Loc, Etyp, Outer_Decls))))); + + Append_To (Outer_Statements, + Add_Parameter_To_NVList (Loc, + Parameter => Current_Parameter, + NVList => Arguments, + Constrained => Constrained, + Any => Any)); + end if; - -- Put first the RPC receiver corresponding to the remote package + if Is_First_Controlling_Formal then + declare + Addr : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('A')); + + Is_Local : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('L')); + + begin + -- Special case: obtain the first controlling formal + -- from the target of the remote call, instead of the + -- argument list. + + Append_To (Outer_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Addr, + Object_Definition => + New_Occurrence_Of (RTE (RE_Address), Loc))); + + Append_To (Outer_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Is_Local, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc))); + + Append_To (Outer_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_Local_Address), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => + New_Occurrence_Of ( + Request_Parameter, Loc), + Selector_Name => + Make_Identifier (Loc, Name_Target)), + New_Occurrence_Of (Is_Local, Loc), + New_Occurrence_Of (Addr, Loc)))); + + Expr := Unchecked_Convert_To (RACW_Type, + New_Occurrence_Of (Addr, Loc)); + end; + + elsif In_Present (Current_Parameter) + or else not Out_Present (Current_Parameter) + or else not Constrained + then + -- If an input parameter is constrained, then its reading is + -- deferred until the beginning of the subprogram body. If + -- it is unconstrained, then an expression is built for + -- the object declaration and the variable is set using + -- 'Input instead of 'Read. + + Expr := PolyORB_Support.Helpers.Build_From_Any_Call ( + Etyp, New_Occurrence_Of (Any, Loc), Decls); + + if Constrained then + Append_To (Statements, + Make_Assignment_Statement (Loc, + Name => New_Occurrence_Of (Object, Loc), + Expression => Expr)); + Expr := Empty; + else + null; - Append_To (Statements, - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), - Attribute_Name => Name_Write, - Expressions => New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Stream_Parameter, Loc), - Attribute_Name => - Name_Access), - RPC_Receiver))); + -- Expr will be used to initialize (and constrain) the + -- parameter when it is declared. + end if; - -- Then put the Subprogram_Id of the subprogram we want to call in - -- the stream. + end if; - Append_To (Statements, - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), - Attribute_Name => - Name_Write, - Expressions => New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Stream_Parameter, Loc), - Attribute_Name => Name_Access), - Subprogram_Id))); + Need_Extra_Constrained := + Nkind (Parameter_Type (Current_Parameter)) /= + N_Access_Definition + and then + Ekind (Defining_Identifier (Current_Parameter)) /= E_Void + and then + Present (Extra_Constrained + (Defining_Identifier (Current_Parameter))); + + -- We may not associate an extra constrained actual to a + -- constant object, so if one is needed, declare the actual + -- as a variable even if it won't be modified. + + Build_Actual_Object_Declaration + (Object => Object, + Etyp => Etyp, + Variable => Need_Extra_Constrained + or else Out_Present (Current_Parameter), + Expr => Expr, + Decls => Decls); + Set_Etype (Object, Etyp); + + -- An out parameter may be written back using a 'Write + -- attribute instead of a 'Output because it has been + -- constrained by the parameter given to the caller. Note that + -- out controlling arguments in the case of a RACW are not put + -- back in the stream because the pointer on them has not + -- changed. + + if Out_Present (Current_Parameter) + and then not Is_Controlling_Formal + then + Append_To (After_Statements, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Move_Any_Value), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + PolyORB_Support.Helpers.Build_To_Any_Call + (New_Occurrence_Of (Object, Loc), Decls)))); + end if; - Current_Parameter := First (Ordered_Parameters_List); + -- For RACW controlling formals, the Etyp of Object is always + -- an RACW, even if the parameter is not of an anonymous access + -- type. In such case, we need to dereference it at call time. - while Current_Parameter /= Empty loop + if Is_Controlling_Formal then + if Nkind (Parameter_Type (Current_Parameter)) /= + N_Access_Definition + then + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of + (Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + Make_Explicit_Dereference (Loc, + Prefix => + Unchecked_Convert_To (RACW_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Object, Loc)))))); - declare - Typ : constant Node_Id := - Parameter_Type (Current_Parameter); - Etyp : Entity_Id; - Constrained : Boolean; - Value : Node_Id; - Extra_Parameter : Entity_Id; + else + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of + (Defining_Identifier (Current_Parameter), Loc), + + Explicit_Actual_Parameter => + Unchecked_Convert_To (RACW_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Object, Loc))))); + end if; - begin + else + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + New_Occurrence_Of (Object, Loc))); + end if; - if Is_RACW_Controlling_Formal (Current_Parameter, Object_Type) then + -- If the current parameter needs an extra formal, then read it + -- from the stream and set the corresponding semantic field in + -- the variable. If the kind of the parameter identifier is + -- E_Void, then this is a compiler generated parameter that + -- doesn't need an extra constrained status. + + -- The case of Extra_Accessibility should also be handled ??? + + if Need_Extra_Constrained then + declare + Extra_Parameter : constant Entity_Id := + Extra_Constrained + (Defining_Identifier + (Current_Parameter)); + + Extra_Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('A')); + + Formal_Entity : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Chars (Extra_Parameter)); + + Formal_Type : constant Entity_Id := + Etype (Extra_Parameter); + + begin + Append_To (Outer_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Extra_Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + PolyORB_Support.Helpers.Build_TypeCode_Call + (Loc, Formal_Type, Outer_Decls))))); + + Append_To (Outer_Extra_Formal_Statements, + Add_Parameter_To_NVList (Loc, + Parameter => Extra_Parameter, + NVList => Arguments, + Constrained => True, + Any => Extra_Any)); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Formal_Entity, + Object_Definition => + New_Occurrence_Of (Formal_Type, Loc))); + + Append_To (Statements, + Make_Assignment_Statement (Loc, + Name => New_Occurrence_Of (Formal_Entity, Loc), + Expression => + PolyORB_Support.Helpers.Build_From_Any_Call + (Formal_Type, + New_Occurrence_Of (Extra_Any, Loc), + Decls))); + Set_Extra_Constrained (Object, Formal_Entity); + end; + end if; + end; - -- In the case of a controlling formal argument, we marshall - -- its addr field rather than the local stub. + Next (Current_Parameter); + end loop; - Append_To (Statements, - Pack_Node_Into_Stream (Loc, - Stream => Stream_Parameter, - Object => - Make_Selected_Component (Loc, - Prefix => - New_Occurrence_Of ( - Defining_Identifier (Current_Parameter), Loc), - Selector_Name => - Make_Identifier (Loc, Name_Addr)), - Etyp => RTE (RE_Unsigned_64))); + -- Extra Formals should go after all the other parameters - else - Value := New_Occurrence_Of - (Defining_Identifier (Current_Parameter), Loc); + Append_List_To (Outer_Statements, Outer_Extra_Formal_Statements); - -- Access type parameters are transmitted as in out - -- parameters. However, a dereference is needed so that - -- we marshall the designated object. + Append_To (Outer_Statements, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Request_Arguments), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request_Parameter, Loc), + New_Occurrence_Of (Arguments, Loc)))); - if Nkind (Typ) = N_Access_Definition then - Value := Make_Explicit_Dereference (Loc, Value); - Etyp := Etype (Subtype_Mark (Typ)); - else - Etyp := Etype (Typ); - end if; + if Nkind (Specification (Vis_Decl)) = N_Function_Specification then - Constrained := - Is_Constrained (Etyp) or else Is_Elementary_Type (Etyp); + -- The remote subprogram is a function: Build an inner block to be + -- able to hold a potentially unconstrained result in a variable. - -- Any parameter but unconstrained out parameters are - -- transmitted to the peer. + declare + Etyp : constant Entity_Id := + Etype (Result_Definition (Specification (Vis_Decl))); + Result : constant Node_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('R')); - if In_Present (Current_Parameter) - or else not Out_Present (Current_Parameter) - or else not Constrained - then - Append_To (Statements, - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Etyp, Loc), - Attribute_Name => Output_From_Constrained (Constrained), - Expressions => New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Stream_Parameter, Loc), - Attribute_Name => Name_Access), - Value))); - end if; - end if; + begin + Inner_Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Result, + Constant_Present => True, + Object_Definition => New_Occurrence_Of (Etyp, Loc), + Expression => + Make_Function_Call (Loc, + Name => Called_Subprogram, + Parameter_Associations => Parameter_List))); + + if Is_Class_Wide_Type (Etyp) then + + -- For a remote call to a function with a class-wide type, + -- check that the returned value satisfies the requirements + -- of (RM E.4(18)). + + Append_To (Inner_Decls, + Make_Transportable_Check (Loc, + New_Occurrence_Of (Result, Loc))); - -- If the current parameter has a dynamic constrained status, - -- then this status is transmitted as well. - -- This should be done for accessibility as well ??? + end if; - if Nkind (Typ) /= N_Access_Definition - and then Need_Extra_Constrained (Current_Parameter) - then - -- In this block, we do not use the extra formal that has been - -- created because it does not exist at the time of expansion - -- when building calling stubs for remote access to subprogram - -- types. We create an extra variable of this type and push it - -- in the stream after the regular parameters. + Set_Etype (Result, Etyp); + Append_To (After_Statements, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Set_Result), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request_Parameter, Loc), + PolyORB_Support.Helpers.Build_To_Any_Call + (New_Occurrence_Of (Result, Loc), Decls)))); + + -- A DSA function does not have out or inout arguments + end; - Extra_Parameter := Make_Defining_Identifier - (Loc, New_Internal_Name ('P')); + Append_To (Statements, + Make_Block_Statement (Loc, + Declarations => Inner_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => After_Statements))); - Append_To (Decls, - Make_Object_Declaration (Loc, - Defining_Identifier => Extra_Parameter, - Constant_Present => True, - Object_Definition => - New_Occurrence_Of (Standard_Boolean, Loc), - Expression => - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of ( - Defining_Identifier (Current_Parameter), Loc), - Attribute_Name => Name_Constrained))); + else + -- The remote subprogram is a procedure. We do not need any inner + -- block in this case. No specific processing is required here for + -- the dynamically asynchronous case: the indication of whether + -- call is asynchronous or not is managed by the Sync_Scope + -- attibute of the request, and is handled entirely in the + -- protocol layer. - Append_To (Extra_Formal_Statements, - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Standard_Boolean, Loc), - Attribute_Name => - Name_Write, - Expressions => New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Stream_Parameter, Loc), - Attribute_Name => - Name_Access), - New_Occurrence_Of (Extra_Parameter, Loc)))); - end if; + Append_To (After_Statements, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Request_Set_Out), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request_Parameter, Loc)))); - Next (Current_Parameter); - end; - end loop; + Append_To (Statements, + Make_Procedure_Call_Statement (Loc, + Name => Called_Subprogram, + Parameter_Associations => Parameter_List)); - -- Append the formal statements list to the statements + Append_List_To (Statements, After_Statements); + end if; - Append_List_To (Statements, Extra_Formal_Statements); + Subp_Spec := + Make_Procedure_Specification (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, New_Internal_Name ('F')), - if not Is_Known_Non_Asynchronous then + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Request_Parameter, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Request_Access), Loc)))); - -- Build the call to System.RPC.Do_APC + -- An exception raised during the execution of an incoming + -- remote subprogram call and that needs to be sent back + -- to the caller is propagated by the receiving stubs, and + -- will be handled by the caller (the distribution runtime). - Asynchronous_Statements := New_List ( - Make_Procedure_Call_Statement (Loc, - Name => - New_Occurrence_Of (RTE (RE_Do_Apc), Loc), - Parameter_Associations => New_List ( - New_Occurrence_Of (Target_Partition, Loc), - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Stream_Parameter, Loc), - Attribute_Name => - Name_Access)))); - else - Asynchronous_Statements := No_List; - end if; + if Asynchronous and then not Dynamically_Asynchronous then - if not Is_Known_Asynchronous then + -- For an asynchronous procedure, add a null exception handler - -- Build the call to System.RPC.Do_RPC + Excep_Handlers := New_List ( + Make_Implicit_Exception_Handler (Loc, + Exception_Choices => New_List (Make_Others_Choice (Loc)), + Statements => New_List (Make_Null_Statement (Loc)))); - Non_Asynchronous_Statements := New_List ( - Make_Procedure_Call_Statement (Loc, - Name => - New_Occurrence_Of (RTE (RE_Do_Rpc), Loc), - Parameter_Associations => New_List ( - New_Occurrence_Of (Target_Partition, Loc), + else + -- In the other cases, if an exception is raised, then the + -- exception occurrence is propagated. - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Stream_Parameter, Loc), - Attribute_Name => - Name_Access), + null; + end if; - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Result_Parameter, Loc), - Attribute_Name => - Name_Access)))); + Append_To (Outer_Statements, + Make_Block_Statement (Loc, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements))); - -- Read the exception occurrence from the result stream and - -- reraise it. It does no harm if this is a Null_Occurrence since - -- this does nothing. + return + Make_Subprogram_Body (Loc, + Specification => Subp_Spec, + Declarations => Outer_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Outer_Statements, + Exception_Handlers => Excep_Handlers)); + end Build_Subprogram_Receiving_Stubs; + + ------------- + -- Helpers -- + ------------- + + package body Helpers is + + ----------------------- + -- Local Subprograms -- + ----------------------- + + function Find_Numeric_Representation + (Typ : Entity_Id) return Entity_Id; + -- Given a numeric type Typ, return the smallest integer or floating + -- point type from Standard, or the smallest unsigned (modular) type + -- from System.Unsigned_Types, whose range encompasses that of Typ. + + function Make_Helper_Function_Name + (Loc : Source_Ptr; + Typ : Entity_Id; + Nam : Name_Id) return Entity_Id; + -- Return the name to be assigned for helper subprogram Nam of Typ + + ------------------------------------------------------------ + -- Common subprograms for building various tree fragments -- + ------------------------------------------------------------ + + function Build_Get_Aggregate_Element + (Loc : Source_Ptr; + Any : Entity_Id; + TC : Node_Id; + Idx : Node_Id) return Node_Id; + -- Build a call to Get_Aggregate_Element on Any for typecode TC, + -- returning the Idx'th element. + + generic + Subprogram : Entity_Id; + -- Reference location for constructed nodes + + Arry : Entity_Id; + -- For 'Range and Etype + + Indices : List_Id; + -- For the construction of the innermost element expression + + with procedure Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id; + Datum : Node_Id); + + procedure Append_Array_Traversal + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id := Empty; + Depth : Pos := 1); + -- Build nested loop statements that iterate over the elements of an + -- array Arry. The statement(s) built by Add_Process_Element are + -- executed for each element; Indices is the list of indices to be + -- used in the construction of the indexed component that denotes the + -- current element. Subprogram is the entity for the subprogram for + -- which this iterator is generated. The generated statements are + -- appended to Stmts. + + generic + Rec : Entity_Id; + -- The record entity being dealt with + + with procedure Add_Process_Element + (Stmts : List_Id; + Container : Node_Or_Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id); + -- Rec is the instance of the record type, or Empty. + -- Field is either the N_Defining_Identifier for a component, + -- or an N_Variant_Part. + + procedure Append_Record_Traversal + (Stmts : List_Id; + Clist : Node_Id; + Container : Node_Or_Entity_Id; + Counter : in out Int); + -- Process component list Clist. Individual fields are passed + -- to Field_Processing. Each variant part is also processed. + -- Container is the outer Any (for From_Any/To_Any), + -- the outer typecode (for TC) to which the operation applies. + + ----------------------------- + -- Append_Record_Traversal -- + ----------------------------- + + procedure Append_Record_Traversal + (Stmts : List_Id; + Clist : Node_Id; + Container : Node_Or_Entity_Id; + Counter : in out Int) + is + CI : List_Id; + VP : Node_Id; + -- Clist's Component_Items and Variant_Part + + Item : Node_Id; + Def : Entity_Id; - Append_To (Non_Asynchronous_Statements, - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc), + begin + if No (Clist) then + return; + end if; - Attribute_Name => - Name_Read, + CI := Component_Items (Clist); + VP := Variant_Part (Clist); - Expressions => New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Result_Parameter, Loc), - Attribute_Name => - Name_Access), - New_Occurrence_Of (Exception_Return_Parameter, Loc)))); + Item := First (CI); + while Present (Item) loop + Def := Defining_Identifier (Item); - Append_To (Non_Asynchronous_Statements, - Make_Procedure_Call_Statement (Loc, - Name => - New_Occurrence_Of (RTE (RE_Reraise_Occurrence), Loc), - Parameter_Associations => New_List ( - New_Occurrence_Of (Exception_Return_Parameter, Loc)))); + if not Is_Internal_Name (Chars (Def)) then + Add_Process_Element + (Stmts, Container, Counter, Rec, Def); + end if; - if Is_Function then + Next (Item); + end loop; - -- If this is a function call, then read the value and return - -- it. The return value is written/read using 'Output/'Input. + if Present (VP) then + Add_Process_Element (Stmts, Container, Counter, Rec, VP); + end if; + end Append_Record_Traversal; - Append_To (Non_Asynchronous_Statements, - Make_Tag_Check (Loc, - Make_Return_Statement (Loc, - Expression => - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of ( - Etype (Subtype_Mark (Spec)), Loc), + ------------------------- + -- Build_From_Any_Call -- + ------------------------- - Attribute_Name => Name_Input, + function Build_From_Any_Call + (Typ : Entity_Id; + N : Node_Id; + Decls : List_Id) return Node_Id + is + Loc : constant Source_Ptr := Sloc (N); - Expressions => New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Result_Parameter, Loc), - Attribute_Name => Name_Access)))))); + U_Type : Entity_Id := Underlying_Type (Typ); - else - -- Loop around parameters and assign out (or in out) parameters. - -- In the case of RACW, controlling arguments cannot possibly - -- have changed since they are remote, so we do not read them - -- from the stream. + Fnam : Entity_Id := Empty; + Lib_RE : RE_Id := RE_Null; + Result : Node_Id; - Current_Parameter := - First (Ordered_Parameters_List); + begin + -- First simple case where the From_Any function is present + -- in the type's TSS. - while Current_Parameter /= Empty loop + Fnam := Find_Inherited_TSS (U_Type, TSS_From_Any); - declare - Typ : constant Node_Id := - Parameter_Type (Current_Parameter); - Etyp : Entity_Id; - Value : Node_Id; - begin - Value := New_Occurrence_Of - (Defining_Identifier (Current_Parameter), Loc); + if Sloc (U_Type) <= Standard_Location then + U_Type := Base_Type (U_Type); + end if; - if Nkind (Typ) = N_Access_Definition then - Value := Make_Explicit_Dereference (Loc, Value); - Etyp := Etype (Subtype_Mark (Typ)); - else - Etyp := Etype (Typ); - end if; + -- Check first for Boolean and Character. These are enumeration + -- types, but we treat them specially, since they may require + -- special handling in the transfer protocol. However, this + -- special handling only applies if they have standard + -- representation, otherwise they are treated like any other + -- enumeration type. - if (Out_Present (Current_Parameter) - or else Nkind (Typ) = N_Access_Definition) - and then Etyp /= Object_Type - then - Append_To (Non_Asynchronous_Statements, - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Etyp, Loc), + if Present (Fnam) then + null; - Attribute_Name => Name_Read, + elsif U_Type = Standard_Boolean then + Lib_RE := RE_FA_B; - Expressions => New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Result_Parameter, Loc), - Attribute_Name => - Name_Access), - Value))); - end if; - end; + elsif U_Type = Standard_Character then + Lib_RE := RE_FA_C; - Next (Current_Parameter); - end loop; - end if; - end if; + elsif U_Type = Standard_Wide_Character then + Lib_RE := RE_FA_WC; - if Is_Known_Asynchronous then - Append_List_To (Statements, Asynchronous_Statements); + elsif U_Type = Standard_Wide_Wide_Character then + Lib_RE := RE_FA_WWC; - elsif Is_Known_Non_Asynchronous then - Append_List_To (Statements, Non_Asynchronous_Statements); + -- Floating point types - else - pragma Assert (Asynchronous /= Empty); - Prepend_To (Asynchronous_Statements, - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Standard_Boolean, Loc), - Attribute_Name => Name_Write, - Expressions => New_List ( - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Stream_Parameter, Loc), - Attribute_Name => Name_Access), - New_Occurrence_Of (Standard_True, Loc)))); - Prepend_To (Non_Asynchronous_Statements, - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Standard_Boolean, Loc), - Attribute_Name => Name_Write, - Expressions => New_List ( - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Stream_Parameter, Loc), - Attribute_Name => Name_Access), - New_Occurrence_Of (Standard_False, Loc)))); - Append_To (Statements, - Make_Implicit_If_Statement (Nod, - Condition => Asynchronous, - Then_Statements => Asynchronous_Statements, - Else_Statements => Non_Asynchronous_Statements)); - end if; - end Build_General_Calling_Stubs; + elsif U_Type = Standard_Short_Float then + Lib_RE := RE_FA_SF; - ----------------------------------- - -- Build_Ordered_Parameters_List -- - ----------------------------------- + elsif U_Type = Standard_Float then + Lib_RE := RE_FA_F; - function Build_Ordered_Parameters_List (Spec : Node_Id) return List_Id is - Constrained_List : List_Id; - Unconstrained_List : List_Id; - Current_Parameter : Node_Id; + elsif U_Type = Standard_Long_Float then + Lib_RE := RE_FA_LF; - begin - if not Present (Parameter_Specifications (Spec)) then - return New_List; - end if; + elsif U_Type = Standard_Long_Long_Float then + Lib_RE := RE_FA_LLF; - Constrained_List := New_List; - Unconstrained_List := New_List; + -- Integer types - -- Loop through the parameters and add them to the right list + elsif U_Type = Etype (Standard_Short_Short_Integer) then + Lib_RE := RE_FA_SSI; - Current_Parameter := First (Parameter_Specifications (Spec)); - while Current_Parameter /= Empty loop + elsif U_Type = Etype (Standard_Short_Integer) then + Lib_RE := RE_FA_SI; - if Nkind (Parameter_Type (Current_Parameter)) = N_Access_Definition - or else - Is_Constrained (Etype (Parameter_Type (Current_Parameter))) - or else - Is_Elementary_Type (Etype (Parameter_Type (Current_Parameter))) - then - Append_To (Constrained_List, New_Copy (Current_Parameter)); - else - Append_To (Unconstrained_List, New_Copy (Current_Parameter)); - end if; + elsif U_Type = Etype (Standard_Integer) then + Lib_RE := RE_FA_I; - Next (Current_Parameter); - end loop; + elsif U_Type = Etype (Standard_Long_Integer) then + Lib_RE := RE_FA_LI; - -- Unconstrained parameters are returned first + elsif U_Type = Etype (Standard_Long_Long_Integer) then + Lib_RE := RE_FA_LLI; - Append_List_To (Unconstrained_List, Constrained_List); + -- Unsigned integer types - return Unconstrained_List; + elsif U_Type = RTE (RE_Short_Short_Unsigned) then + Lib_RE := RE_FA_SSU; - end Build_Ordered_Parameters_List; + elsif U_Type = RTE (RE_Short_Unsigned) then + Lib_RE := RE_FA_SU; - ---------------------------------- - -- Build_Passive_Partition_Stub -- - ---------------------------------- + elsif U_Type = RTE (RE_Unsigned) then + Lib_RE := RE_FA_U; - procedure Build_Passive_Partition_Stub (U : Node_Id) is - Pkg_Spec : Node_Id; - L : List_Id; - Reg : Node_Id; - Loc : constant Source_Ptr := Sloc (U); + elsif U_Type = RTE (RE_Long_Unsigned) then + Lib_RE := RE_FA_LU; - begin - -- Verify that the implementation supports distribution, by accessing - -- a type defined in the proper version of system.rpc + elsif U_Type = RTE (RE_Long_Long_Unsigned) then + Lib_RE := RE_FA_LLU; - declare - Dist_OK : Entity_Id; - pragma Warnings (Off, Dist_OK); + elsif U_Type = Standard_String then + Lib_RE := RE_FA_String; - begin - Dist_OK := RTE (RE_Params_Stream_Type); - end; + -- Special DSA types - -- Use body if present, spec otherwise + elsif Is_RTE (U_Type, RE_Any_Content_Ptr) then + Lib_RE := RE_FA_A; - if Nkind (U) = N_Package_Declaration then - Pkg_Spec := Specification (U); - L := Visible_Declarations (Pkg_Spec); - else - Pkg_Spec := Parent (Corresponding_Spec (U)); - L := Declarations (U); - end if; + -- Other (non-primitive) types - Reg := - Make_Procedure_Call_Statement (Loc, - Name => - New_Occurrence_Of (RTE (RE_Register_Passive_Package), Loc), - Parameter_Associations => New_List ( - Make_String_Literal (Loc, Get_Pkg_Name_String_Id (Pkg_Spec)), - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (Defining_Entity (Pkg_Spec), Loc), - Attribute_Name => - Name_Version))); - Append_To (L, Reg); - Analyze (Reg); - end Build_Passive_Partition_Stub; + else + declare + Decl : Entity_Id; + begin + Build_From_Any_Function (Loc, U_Type, Decl, Fnam); + Append_To (Decls, Decl); + end; + end if; - -------------------------------------- - -- Build_RPC_Receiver_Specification -- - -------------------------------------- + -- Call the function - function Build_RPC_Receiver_Specification - (RPC_Receiver : Entity_Id; - Stream_Parameter : Entity_Id; - Result_Parameter : Entity_Id) - return Node_Id - is - Loc : constant Source_Ptr := Sloc (RPC_Receiver); + if Lib_RE /= RE_Null then + pragma Assert (No (Fnam)); + Fnam := RTE (Lib_RE); + end if; - begin - return - Make_Procedure_Specification (Loc, - Defining_Unit_Name => RPC_Receiver, - Parameter_Specifications => New_List ( - Make_Parameter_Specification (Loc, - Defining_Identifier => Stream_Parameter, - Parameter_Type => - Make_Access_Definition (Loc, - Subtype_Mark => - New_Occurrence_Of (RTE (RE_Params_Stream_Type), Loc))), + Result := + Make_Function_Call (Loc, + Name => New_Occurrence_Of (Fnam, Loc), + Parameter_Associations => New_List (N)); - Make_Parameter_Specification (Loc, - Defining_Identifier => Result_Parameter, - Parameter_Type => - Make_Access_Definition (Loc, - Subtype_Mark => - New_Occurrence_Of - (RTE (RE_Params_Stream_Type), Loc))))); - end Build_RPC_Receiver_Specification; + -- We must set the type of Result, so the unchecked conversion + -- from the underlying type to the base type is properly done. - ------------------------------------ - -- Build_Subprogram_Calling_Stubs -- - ------------------------------------ + Set_Etype (Result, U_Type); - function Build_Subprogram_Calling_Stubs - (Vis_Decl : Node_Id; - Subp_Id : Int; - Asynchronous : Boolean; - Dynamically_Asynchronous : Boolean := False; - Stub_Type : Entity_Id := Empty; - Locator : Entity_Id := Empty; - New_Name : Name_Id := No_Name) - return Node_Id - is - Loc : constant Source_Ptr := Sloc (Vis_Decl); + return Unchecked_Convert_To (Typ, Result); + end Build_From_Any_Call; - Target_Partition : Node_Id; - -- Contains the name of the target partition + ----------------------------- + -- Build_From_Any_Function -- + ----------------------------- - Decls : constant List_Id := New_List; - Statements : constant List_Id := New_List; + procedure Build_From_Any_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id) + is + Spec : Node_Id; + Decls : constant List_Id := New_List; + Stms : constant List_Id := New_List; - Subp_Spec : Node_Id; - -- The specification of the body + Any_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('A')); - Controlling_Parameter : Entity_Id := Empty; - RPC_Receiver : Node_Id; + Use_Opaque_Representation : Boolean; - Asynchronous_Expr : Node_Id := Empty; + begin + if Is_Itype (Typ) then + Build_From_Any_Function + (Loc => Loc, + Typ => Etype (Typ), + Decl => Decl, + Fnam => Fnam); + return; + end if; - RCI_Locator : Entity_Id; + Fnam := Make_Helper_Function_Name (Loc, Typ, Name_From_Any); - Spec_To_Use : Node_Id; + Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Any_Parameter, + Parameter_Type => New_Occurrence_Of (RTE (RE_Any), Loc))), + Result_Definition => New_Occurrence_Of (Typ, Loc)); - procedure Insert_Partition_Check (Parameter : in Node_Id); - -- Check that the parameter has been elaborated on the same partition - -- than the controlling parameter (E.4(19)). + -- The following is taken care of by Exp_Dist.Add_RACW_From_Any - ---------------------------- - -- Insert_Partition_Check -- - ---------------------------- + pragma Assert + (not (Is_Remote_Access_To_Class_Wide_Type (Typ))); - procedure Insert_Partition_Check (Parameter : in Node_Id) is - Parameter_Entity : constant Entity_Id := - Defining_Identifier (Parameter); - Condition : Node_Id; + Use_Opaque_Representation := False; - Designated_Object : Node_Id; - pragma Warnings (Off, Designated_Object); - -- Is it really right that this is unreferenced ??? + if Has_Stream_Attribute_Definition + (Typ, TSS_Stream_Output, At_Any_Place => True) + or else + Has_Stream_Attribute_Definition + (Typ, TSS_Stream_Write, At_Any_Place => True) + then + -- If user-defined stream attributes are specified for this + -- type, use them and transmit data as an opaque sequence of + -- stream elements. + + Use_Opaque_Representation := True; + + elsif Is_Derived_Type (Typ) and then not Is_Tagged_Type (Typ) then + Append_To (Stms, + Make_Simple_Return_Statement (Loc, + Expression => + OK_Convert_To (Typ, + Build_From_Any_Call + (Root_Type (Typ), + New_Occurrence_Of (Any_Parameter, Loc), + Decls)))); + + elsif Is_Record_Type (Typ) + and then not Is_Derived_Type (Typ) + and then not Is_Tagged_Type (Typ) + then + if Nkind (Declaration_Node (Typ)) = N_Subtype_Declaration then + Append_To (Stms, + Make_Simple_Return_Statement (Loc, + Expression => + OK_Convert_To (Typ, + Build_From_Any_Call + (Etype (Typ), + New_Occurrence_Of (Any_Parameter, Loc), + Decls)))); - begin - -- The expression that will be built is of the form: - -- if not (Parameter in Stub_Type and then - -- Parameter.Origin = Controlling.Origin) - -- then - -- raise Constraint_Error; - -- end if; - -- - -- Condition contains the reversed condition. Also, Parameter is - -- dereferenced if it is an access type. We do not check that - -- Parameter is in Stub_Type since such a check has been inserted - -- at the point of call already (a tag check since we have multiple - -- controlling operands). - - if Nkind (Parameter_Type (Parameter)) = N_Access_Definition then - Designated_Object := - Make_Explicit_Dereference (Loc, - Prefix => New_Occurrence_Of (Parameter_Entity, Loc)); - else - Designated_Object := New_Occurrence_Of (Parameter_Entity, Loc); - end if; + else + declare + Disc : Entity_Id := Empty; + Discriminant_Associations : List_Id; + Rdef : constant Node_Id := + Type_Definition + (Declaration_Node (Typ)); + Component_Counter : Int := 0; + + -- The returned object + + Res : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('R')); + + Res_Definition : Node_Id := New_Occurrence_Of (Typ, Loc); + + procedure FA_Rec_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id); + + procedure FA_Append_Record_Traversal is + new Append_Record_Traversal + (Rec => Res, + Add_Process_Element => FA_Rec_Add_Process_Element); + + -------------------------------- + -- FA_Rec_Add_Process_Element -- + -------------------------------- + + procedure FA_Rec_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id) + is + begin + if Nkind (Field) = N_Defining_Identifier then + + -- A regular component + + Append_To (Stmts, + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => + New_Occurrence_Of (Rec, Loc), + Selector_Name => + New_Occurrence_Of (Field, Loc)), + Expression => + Build_From_Any_Call (Etype (Field), + Build_Get_Aggregate_Element (Loc, + Any => Any, + TC => Build_TypeCode_Call (Loc, + Etype (Field), Decls), + Idx => Make_Integer_Literal (Loc, + Counter)), + Decls))); + + else + -- A variant part + + declare + Variant : Node_Id; + Struct_Counter : Int := 0; + + Block_Decls : constant List_Id := New_List; + Block_Stmts : constant List_Id := New_List; + VP_Stmts : List_Id; + + Alt_List : constant List_Id := New_List; + Choice_List : List_Id; + + Struct_Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('S')); + + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Struct_Any, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of + (RTE (RE_Extract_Union_Value), Loc), + + Parameter_Associations => New_List ( + Build_Get_Aggregate_Element (Loc, + Any => Any, + TC => + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Any_Member_Type), Loc), + Parameter_Associations => + New_List ( + New_Occurrence_Of (Any, Loc), + Make_Integer_Literal (Loc, + Intval => Counter))), + Idx => + Make_Integer_Literal (Loc, + Intval => Counter)))))); + + Append_To (Stmts, + Make_Block_Statement (Loc, + Declarations => Block_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Block_Stmts))); + + Append_To (Block_Stmts, + Make_Case_Statement (Loc, + Expression => + Make_Selected_Component (Loc, + Prefix => Rec, + Selector_Name => Chars (Name (Field))), + Alternatives => Alt_List)); + + Variant := First_Non_Pragma (Variants (Field)); + while Present (Variant) loop + Choice_List := + New_Copy_List_Tree + (Discrete_Choices (Variant)); + + VP_Stmts := New_List; + + -- Struct_Counter should be reset before + -- handling a variant part. Indeed only one + -- of the case statement alternatives will be + -- executed at run-time, so the counter must + -- start at 0 for every case statement. + + Struct_Counter := 0; + + FA_Append_Record_Traversal ( + Stmts => VP_Stmts, + Clist => Component_List (Variant), + Container => Struct_Any, + Counter => Struct_Counter); + + Append_To (Alt_List, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => Choice_List, + Statements => VP_Stmts)); + Next_Non_Pragma (Variant); + end loop; + end; + end if; + + Counter := Counter + 1; + end FA_Rec_Add_Process_Element; + + begin + -- First all discriminants + + if Has_Discriminants (Typ) then + Discriminant_Associations := New_List; + + Disc := First_Discriminant (Typ); + while Present (Disc) loop + declare + Disc_Var_Name : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Chars (Disc)); + Disc_Type : constant Entity_Id := + Etype (Disc); + + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Disc_Var_Name, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (Disc_Type, Loc), + + Expression => + Build_From_Any_Call (Disc_Type, + Build_Get_Aggregate_Element (Loc, + Any => Any_Parameter, + TC => Build_TypeCode_Call + (Loc, Disc_Type, Decls), + Idx => Make_Integer_Literal (Loc, + Intval => Component_Counter)), + Decls))); + + Component_Counter := Component_Counter + 1; + + Append_To (Discriminant_Associations, + Make_Discriminant_Association (Loc, + Selector_Names => New_List ( + New_Occurrence_Of (Disc, Loc)), + Expression => + New_Occurrence_Of (Disc_Var_Name, Loc))); + end; + Next_Discriminant (Disc); + end loop; + + Res_Definition := + Make_Subtype_Indication (Loc, + Subtype_Mark => Res_Definition, + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + Discriminant_Associations)); + end if; + + -- Now we have all the discriminants in variables, we can + -- declared a constrained object. Note that we are not + -- initializing (non-discriminant) components directly in + -- the object declarations, because which fields to + -- initialize depends (at run time) on the discriminant + -- values. + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Res, + Object_Definition => Res_Definition)); + + -- ... then all components + + FA_Append_Record_Traversal (Stms, + Clist => Component_List (Rdef), + Container => Any_Parameter, + Counter => Component_Counter); + + Append_To (Stms, + Make_Simple_Return_Statement (Loc, + Expression => New_Occurrence_Of (Res, Loc))); + end; + end if; - Condition := - Make_Op_Eq (Loc, - Left_Opnd => - Make_Selected_Component (Loc, - Prefix => - New_Occurrence_Of (Parameter_Entity, Loc), - Selector_Name => - Make_Identifier (Loc, Name_Origin)), + elsif Is_Array_Type (Typ) then + declare + Constrained : constant Boolean := Is_Constrained (Typ); + + procedure FA_Ary_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id; + Datum : Node_Id); + -- Assign the current element (as identified by Counter) of + -- Any to the variable denoted by name Datum, and advance + -- Counter by 1. If Datum is not an Any, a call to From_Any + -- for its type is inserted. + + -------------------------------- + -- FA_Ary_Add_Process_Element -- + -------------------------------- + + procedure FA_Ary_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id; + Datum : Node_Id) + is + Assignment : constant Node_Id := + Make_Assignment_Statement (Loc, + Name => Datum, + Expression => Empty); + + Element_Any : Node_Id; + + begin + declare + Element_TC : Node_Id; + + begin + if Etype (Datum) = RTE (RE_Any) then + + -- When Datum is an Any the Etype field is not + -- sufficient to determine the typecode of Datum + -- (which can be a TC_SEQUENCE or TC_ARRAY + -- depending on the value of Constrained). + + -- Therefore we retrieve the typecode which has + -- been constructed in Append_Array_Traversal with + -- a call to Get_Any_Type. + + Element_TC := + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Get_Any_Type), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Entity (Datum), Loc))); + else + -- For non Any Datum we simply construct a typecode + -- matching the Etype of the Datum. + + Element_TC := Build_TypeCode_Call + (Loc, Etype (Datum), Decls); + end if; + + Element_Any := + Build_Get_Aggregate_Element (Loc, + Any => Any, + TC => Element_TC, + Idx => New_Occurrence_Of (Counter, Loc)); + end; + + -- Note: here we *prepend* statements to Stmts, so + -- we must do it in reverse order. + + Prepend_To (Stmts, + Make_Assignment_Statement (Loc, + Name => + New_Occurrence_Of (Counter, Loc), + Expression => + Make_Op_Add (Loc, + Left_Opnd => New_Occurrence_Of (Counter, Loc), + Right_Opnd => Make_Integer_Literal (Loc, 1)))); + + if Nkind (Datum) /= N_Attribute_Reference then + + -- We ignore the value of the length of each + -- dimension, since the target array has already + -- been constrained anyway. + + if Etype (Datum) /= RTE (RE_Any) then + Set_Expression (Assignment, + Build_From_Any_Call + (Component_Type (Typ), Element_Any, Decls)); + else + Set_Expression (Assignment, Element_Any); + end if; + + Prepend_To (Stmts, Assignment); + end if; + end FA_Ary_Add_Process_Element; + + ------------------------ + -- Local Declarations -- + ------------------------ + + Counter : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_J); + + Initial_Counter_Value : Int := 0; + + Component_TC : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_T); + + Res : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_R); + + procedure Append_From_Any_Array_Iterator is + new Append_Array_Traversal ( + Subprogram => Fnam, + Arry => Res, + Indices => New_List, + Add_Process_Element => FA_Ary_Add_Process_Element); + + Res_Subtype_Indication : Node_Id := + New_Occurrence_Of (Typ, Loc); - Right_Opnd => - Make_Selected_Component (Loc, - Prefix => - New_Occurrence_Of (Controlling_Parameter, Loc), - Selector_Name => - Make_Identifier (Loc, Name_Origin))); + begin + if not Constrained then + declare + Ndim : constant Int := Number_Dimensions (Typ); + Lnam : Name_Id; + Hnam : Name_Id; + Indx : Node_Id := First_Index (Typ); + Indt : Entity_Id; + + Ranges : constant List_Id := New_List; + + begin + for J in 1 .. Ndim loop + Lnam := New_External_Name ('L', J); + Hnam := New_External_Name ('H', J); + Indt := Etype (Indx); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Lnam), + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (Indt, Loc), + Expression => + Build_From_Any_Call + (Indt, + Build_Get_Aggregate_Element (Loc, + Any => Any_Parameter, + TC => Build_TypeCode_Call + (Loc, Indt, Decls), + Idx => + Make_Integer_Literal (Loc, J - 1)), + Decls))); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Hnam), + + Constant_Present => True, + + Object_Definition => + New_Occurrence_Of (Indt, Loc), + + Expression => Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Indt, Loc), + + Attribute_Name => Name_Val, + + Expressions => New_List ( + Make_Op_Subtract (Loc, + Left_Opnd => + Make_Op_Add (Loc, + Left_Opnd => + OK_Convert_To ( + Standard_Long_Integer, + Make_Identifier (Loc, Lnam)), + + Right_Opnd => + OK_Convert_To ( + Standard_Long_Integer, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE ( + RE_Get_Nested_Sequence_Length + ), Loc), + Parameter_Associations => + New_List ( + New_Occurrence_Of ( + Any_Parameter, Loc), + Make_Integer_Literal (Loc, + Intval => J))))), + + Right_Opnd => + Make_Integer_Literal (Loc, 1)))))); + + Append_To (Ranges, + Make_Range (Loc, + Low_Bound => Make_Identifier (Loc, Lnam), + High_Bound => Make_Identifier (Loc, Hnam))); + + Next_Index (Indx); + end loop; + + -- Now we have all the necessary bound information: + -- apply the set of range constraints to the + -- (unconstrained) nominal subtype of Res. + + Initial_Counter_Value := Ndim; + Res_Subtype_Indication := Make_Subtype_Indication (Loc, + Subtype_Mark => Res_Subtype_Indication, + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + Constraints => Ranges)); + end; + end if; - Append_To (Decls, - Make_Raise_Constraint_Error (Loc, - Condition => - Make_Op_Not (Loc, Right_Opnd => Condition), - Reason => CE_Partition_Check_Failed)); - end Insert_Partition_Check; + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Res, + Object_Definition => Res_Subtype_Indication)); + Set_Etype (Res, Typ); - -- Start of processing for Build_Subprogram_Calling_Stubs + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Counter, + Object_Definition => + New_Occurrence_Of (RTE (RE_Long_Unsigned), Loc), + Expression => + Make_Integer_Literal (Loc, Initial_Counter_Value))); - begin - Target_Partition := - Make_Defining_Identifier (Loc, New_Internal_Name ('P')); + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Component_TC, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_TypeCode), Loc), + Expression => + Build_TypeCode_Call (Loc, + Component_Type (Typ), Decls))); - Subp_Spec := Copy_Specification (Loc, - Spec => Specification (Vis_Decl), - New_Name => New_Name); + Append_From_Any_Array_Iterator + (Stms, Any_Parameter, Counter); - if Locator = Empty then - RCI_Locator := RCI_Cache; - Spec_To_Use := Specification (Vis_Decl); - else - RCI_Locator := Locator; - Spec_To_Use := Subp_Spec; - end if; + Append_To (Stms, + Make_Simple_Return_Statement (Loc, + Expression => New_Occurrence_Of (Res, Loc))); + end; - -- Find a controlling argument if we have a stub type. Also check - -- if this subprogram can be made asynchronous. + elsif Is_Integer_Type (Typ) or else Is_Unsigned_Type (Typ) then + Append_To (Stms, + Make_Simple_Return_Statement (Loc, + Expression => + Unchecked_Convert_To (Typ, + Build_From_Any_Call + (Find_Numeric_Representation (Typ), + New_Occurrence_Of (Any_Parameter, Loc), + Decls)))); - if Stub_Type /= Empty - and then Present (Parameter_Specifications (Spec_To_Use)) - then - declare - Current_Parameter : Node_Id := - First (Parameter_Specifications - (Spec_To_Use)); - begin - while Current_Parameter /= Empty loop + else + Use_Opaque_Representation := True; + end if; - if - Is_RACW_Controlling_Formal (Current_Parameter, Stub_Type) - then - if Controlling_Parameter = Empty then - Controlling_Parameter := - Defining_Identifier (Current_Parameter); - else - Insert_Partition_Check (Current_Parameter); - end if; - end if; + if Use_Opaque_Representation then - Next (Current_Parameter); - end loop; - end; - end if; + -- Default: type is represented as an opaque sequence of bytes - if Stub_Type /= Empty then - pragma Assert (Controlling_Parameter /= Empty); + declare + Strm : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('S')); + Res : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('R')); - Append_To (Decls, - Make_Object_Declaration (Loc, - Defining_Identifier => Target_Partition, - Constant_Present => True, - Object_Definition => - New_Occurrence_Of (RTE (RE_Partition_ID), Loc), + begin + -- Strm : Buffer_Stream_Type; - Expression => - Make_Selected_Component (Loc, - Prefix => - New_Occurrence_Of (Controlling_Parameter, Loc), - Selector_Name => - Make_Identifier (Loc, Name_Origin)))); + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Strm, + Aliased_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Buffer_Stream_Type), Loc))); - RPC_Receiver := - Make_Selected_Component (Loc, - Prefix => - New_Occurrence_Of (Controlling_Parameter, Loc), - Selector_Name => - Make_Identifier (Loc, Name_Receiver)); + -- Allocate_Buffer (Strm); - else - Append_To (Decls, - Make_Object_Declaration (Loc, - Defining_Identifier => Target_Partition, - Constant_Present => True, - Object_Definition => - New_Occurrence_Of (RTE (RE_Partition_ID), Loc), + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Allocate_Buffer), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Strm, Loc)))); - Expression => - Make_Function_Call (Loc, - Name => Make_Selected_Component (Loc, - Prefix => - Make_Identifier (Loc, Chars (RCI_Locator)), - Selector_Name => - Make_Identifier (Loc, Name_Get_Active_Partition_ID))))); + -- Any_To_BS (Strm, A); - RPC_Receiver := - Make_Selected_Component (Loc, - Prefix => - Make_Identifier (Loc, Chars (RCI_Locator)), - Selector_Name => - Make_Identifier (Loc, Name_Get_RCI_Package_Receiver)); - end if; + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Any_To_BS), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any_Parameter, Loc), + New_Occurrence_Of (Strm, Loc)))); + + -- declare + -- Res : constant T := T'Input (Strm); + -- begin + -- Release_Buffer (Strm); + -- return Res; + -- end; + + Append_To (Stms, Make_Block_Statement (Loc, + Declarations => New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Res, + Constant_Present => True, + Object_Definition => New_Occurrence_Of (Typ, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Typ, Loc), + Attribute_Name => Name_Input, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Strm, Loc), + Attribute_Name => Name_Access))))), + + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Release_Buffer), Loc), + Parameter_Associations => + New_List (New_Occurrence_Of (Strm, Loc))), + Make_Simple_Return_Statement (Loc, + Expression => New_Occurrence_Of (Res, Loc)))))); - if Dynamically_Asynchronous then - Asynchronous_Expr := - Make_Selected_Component (Loc, - Prefix => - New_Occurrence_Of (Controlling_Parameter, Loc), - Selector_Name => - Make_Identifier (Loc, Name_Asynchronous)); - end if; + end; + end if; - Build_General_Calling_Stubs - (Decls => Decls, - Statements => Statements, - Target_Partition => Target_Partition, - RPC_Receiver => RPC_Receiver, - Subprogram_Id => Make_Integer_Literal (Loc, Subp_Id), - Asynchronous => Asynchronous_Expr, - Is_Known_Asynchronous => Asynchronous - and then not Dynamically_Asynchronous, - Is_Known_Non_Asynchronous - => not Asynchronous - and then not Dynamically_Asynchronous, - Is_Function => Nkind (Spec_To_Use) = - N_Function_Specification, - Spec => Spec_To_Use, - Object_Type => Stub_Type, - Nod => Vis_Decl); + Decl := + Make_Subprogram_Body (Loc, + Specification => Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stms)); + end Build_From_Any_Function; + + --------------------------------- + -- Build_Get_Aggregate_Element -- + --------------------------------- + + function Build_Get_Aggregate_Element + (Loc : Source_Ptr; + Any : Entity_Id; + TC : Node_Id; + Idx : Node_Id) return Node_Id + is + begin + return Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + TC, + Idx)); + end Build_Get_Aggregate_Element; + + ------------------------- + -- Build_Reposiroty_Id -- + ------------------------- + + procedure Build_Name_And_Repository_Id + (E : Entity_Id; + Name_Str : out String_Id; + Repo_Id_Str : out String_Id) + is + begin + Start_String; + Store_String_Chars ("DSA:"); + Get_Library_Unit_Name_String (Scope (E)); + Store_String_Chars + (Name_Buffer (Name_Buffer'First .. + Name_Buffer'First + Name_Len - 1)); + Store_String_Char ('.'); + Get_Name_String (Chars (E)); + Store_String_Chars + (Name_Buffer (Name_Buffer'First .. + Name_Buffer'First + Name_Len - 1)); + Store_String_Chars (":1.0"); + Repo_Id_Str := End_String; + Name_Str := String_From_Name_Buffer; + end Build_Name_And_Repository_Id; + + ----------------------- + -- Build_To_Any_Call -- + ----------------------- + + function Build_To_Any_Call + (N : Node_Id; + Decls : List_Id) return Node_Id + is + Loc : constant Source_Ptr := Sloc (N); + + Typ : Entity_Id := Etype (N); + U_Type : Entity_Id; + Fnam : Entity_Id := Empty; + Lib_RE : RE_Id := RE_Null; - RCI_Calling_Stubs_Table.Set - (Defining_Unit_Name (Specification (Vis_Decl)), - Defining_Unit_Name (Spec_To_Use)); + begin + -- If N is a selected component, then maybe its Etype has not been + -- set yet: try to use Etype of the selector_name in that case. - return - Make_Subprogram_Body (Loc, - Specification => Subp_Spec, - Declarations => Decls, - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, Statements)); - end Build_Subprogram_Calling_Stubs; + if No (Typ) and then Nkind (N) = N_Selected_Component then + Typ := Etype (Selector_Name (N)); + end if; + pragma Assert (Present (Typ)); - ------------------------- - -- Build_Subprogram_Id -- - ------------------------- + -- Get full view for private type, completion for incomplete type - function Build_Subprogram_Id - (Loc : Source_Ptr; - E : Entity_Id) return Node_Id - is - begin - return Make_Integer_Literal (Loc, Get_Subprogram_Id (E)); - end Build_Subprogram_Id; + U_Type := Underlying_Type (Typ); - -------------------------------------- - -- Build_Subprogram_Receiving_Stubs -- - -------------------------------------- + -- First simple case where the To_Any function is present in the + -- type's TSS. - function Build_Subprogram_Receiving_Stubs - (Vis_Decl : Node_Id; - Asynchronous : Boolean; - Dynamically_Asynchronous : Boolean := False; - Stub_Type : Entity_Id := Empty; - RACW_Type : Entity_Id := Empty; - Parent_Primitive : Entity_Id := Empty) - return Node_Id - is - Loc : constant Source_Ptr := Sloc (Vis_Decl); + Fnam := Find_Inherited_TSS (U_Type, TSS_To_Any); - Stream_Parameter : Node_Id; - Result_Parameter : Node_Id; - -- See explanations of those in Build_Subprogram_Calling_Stubs + -- Check first for Boolean and Character. These are enumeration + -- types, but we treat them specially, since they may require + -- special handling in the transfer protocol. However, this + -- special handling only applies if they have standard + -- representation, otherwise they are treated like any other + -- enumeration type. - Decls : constant List_Id := New_List; - -- All the parameters will get declared before calling the real - -- subprograms. Also the out parameters will be declared. + if Sloc (U_Type) <= Standard_Location then + U_Type := Base_Type (U_Type); + end if; - Statements : constant List_Id := New_List; + if Present (Fnam) then + null; - Extra_Formal_Statements : constant List_Id := New_List; - -- Statements concerning extra formal parameters + elsif U_Type = Standard_Boolean then + Lib_RE := RE_TA_B; - After_Statements : constant List_Id := New_List; - -- Statements to be executed after the subprogram call + elsif U_Type = Standard_Character then + Lib_RE := RE_TA_C; - Inner_Decls : List_Id := No_List; - -- In case of a function, the inner declarations are needed since - -- the result may be unconstrained. + elsif U_Type = Standard_Wide_Character then + Lib_RE := RE_TA_WC; - Excep_Handler : Node_Id; - Excep_Choice : Entity_Id; - Excep_Code : List_Id; + elsif U_Type = Standard_Wide_Wide_Character then + Lib_RE := RE_TA_WWC; - Parameter_List : constant List_Id := New_List; - -- List of parameters to be passed to the subprogram + -- Floating point types - Current_Parameter : Node_Id; + elsif U_Type = Standard_Short_Float then + Lib_RE := RE_TA_SF; - Ordered_Parameters_List : constant List_Id := - Build_Ordered_Parameters_List - (Specification (Vis_Decl)); + elsif U_Type = Standard_Float then + Lib_RE := RE_TA_F; - Subp_Spec : Node_Id; - -- Subprogram specification + elsif U_Type = Standard_Long_Float then + Lib_RE := RE_TA_LF; - Called_Subprogram : Node_Id; - -- The subprogram to call + elsif U_Type = Standard_Long_Long_Float then + Lib_RE := RE_TA_LLF; - Null_Raise_Statement : Node_Id; + -- Integer types - Dynamic_Async : Entity_Id; + elsif U_Type = Etype (Standard_Short_Short_Integer) then + Lib_RE := RE_TA_SSI; - begin - if RACW_Type /= Empty then - Called_Subprogram := - New_Occurrence_Of (Parent_Primitive, Loc); - else - Called_Subprogram := - New_Occurrence_Of ( - Defining_Unit_Name (Specification (Vis_Decl)), Loc); - end if; + elsif U_Type = Etype (Standard_Short_Integer) then + Lib_RE := RE_TA_SI; - Stream_Parameter := - Make_Defining_Identifier (Loc, New_Internal_Name ('S')); + elsif U_Type = Etype (Standard_Integer) then + Lib_RE := RE_TA_I; - if Dynamically_Asynchronous then - Dynamic_Async := - Make_Defining_Identifier (Loc, New_Internal_Name ('S')); - else - Dynamic_Async := Empty; - end if; + elsif U_Type = Etype (Standard_Long_Integer) then + Lib_RE := RE_TA_LI; - if not Asynchronous or else Dynamically_Asynchronous then - Result_Parameter := - Make_Defining_Identifier (Loc, New_Internal_Name ('S')); + elsif U_Type = Etype (Standard_Long_Long_Integer) then + Lib_RE := RE_TA_LLI; - -- The first statement after the subprogram call is a statement to - -- writes a Null_Occurrence into the result stream. + -- Unsigned integer types - Null_Raise_Statement := - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc), - Attribute_Name => Name_Write, - Expressions => New_List ( - New_Occurrence_Of (Result_Parameter, Loc), - New_Occurrence_Of (RTE (RE_Null_Occurrence), Loc))); + elsif U_Type = RTE (RE_Short_Short_Unsigned) then + Lib_RE := RE_TA_SSU; - if Dynamically_Asynchronous then - Null_Raise_Statement := - Make_Implicit_If_Statement (Vis_Decl, - Condition => - Make_Op_Not (Loc, New_Occurrence_Of (Dynamic_Async, Loc)), - Then_Statements => New_List (Null_Raise_Statement)); - end if; + elsif U_Type = RTE (RE_Short_Unsigned) then + Lib_RE := RE_TA_SU; - Append_To (After_Statements, Null_Raise_Statement); + elsif U_Type = RTE (RE_Unsigned) then + Lib_RE := RE_TA_U; - else - Result_Parameter := Empty; - end if; + elsif U_Type = RTE (RE_Long_Unsigned) then + Lib_RE := RE_TA_LU; - -- Loop through every parameter and get its value from the stream. If - -- the parameter is unconstrained, then the parameter is read using - -- 'Input at the point of declaration. + elsif U_Type = RTE (RE_Long_Long_Unsigned) then + Lib_RE := RE_TA_LLU; - Current_Parameter := First (Ordered_Parameters_List); + elsif U_Type = Standard_String then + Lib_RE := RE_TA_String; - while Current_Parameter /= Empty loop + -- Special DSA types - declare - Etyp : Entity_Id; - Constrained : Boolean; - Object : Entity_Id; - Expr : Node_Id := Empty; + elsif Is_RTE (U_Type, RE_Any_Content_Ptr) then + Lib_RE := RE_TA_A; - begin - Object := Make_Defining_Identifier (Loc, New_Internal_Name ('P')); - Set_Ekind (Object, E_Variable); + elsif U_Type = Underlying_Type (RTE (RE_TypeCode)) then + -- No corresponding FA_TC ??? + Lib_RE := RE_TA_TC; - if - Is_RACW_Controlling_Formal (Current_Parameter, Stub_Type) - then - -- We have a controlling formal parameter. Read its address - -- rather than a real object. The address is in Unsigned_64 - -- form. + -- Other (non-primitive) types - Etyp := RTE (RE_Unsigned_64); else - Etyp := Etype (Parameter_Type (Current_Parameter)); + declare + Decl : Entity_Id; + begin + Build_To_Any_Function (Loc, U_Type, Decl, Fnam); + Append_To (Decls, Decl); + end; end if; - Constrained := - Is_Constrained (Etyp) or else Is_Elementary_Type (Etyp); + -- Call the function - if In_Present (Current_Parameter) - or else not Out_Present (Current_Parameter) - or else not Constrained - then - -- If an input parameter is contrained, then its reading is - -- deferred until the beginning of the subprogram body. If - -- it is unconstrained, then an expression is built for - -- the object declaration and the variable is set using - -- 'Input instead of 'Read. + if Lib_RE /= RE_Null then + pragma Assert (No (Fnam)); + Fnam := RTE (Lib_RE); + end if; - if Constrained then - Append_To (Statements, - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Etyp, Loc), - Attribute_Name => Name_Read, - Expressions => New_List ( - New_Occurrence_Of (Stream_Parameter, Loc), - New_Occurrence_Of (Object, Loc)))); + return + Make_Function_Call (Loc, + Name => New_Occurrence_Of (Fnam, Loc), + Parameter_Associations => + New_List (Unchecked_Convert_To (U_Type, N))); + end Build_To_Any_Call; + + --------------------------- + -- Build_To_Any_Function -- + --------------------------- + + procedure Build_To_Any_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id) + is + Spec : Node_Id; + Decls : constant List_Id := New_List; + Stms : constant List_Id := New_List; + + Expr_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_E); + + Any : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_A); + + Any_Decl : Node_Id; + Result_TC : Node_Id := Build_TypeCode_Call (Loc, Typ, Decls); + + Use_Opaque_Representation : Boolean; + -- When True, use stream attributes and represent type as an + -- opaque sequence of bytes. - else - Expr := Input_With_Tag_Check (Loc, - Var_Type => Etyp, - Stream => Stream_Parameter); - Append_To (Decls, Expr); - Expr := Make_Function_Call (Loc, - New_Occurrence_Of (Defining_Unit_Name - (Specification (Expr)), Loc)); - end if; + begin + if Is_Itype (Typ) then + Build_To_Any_Function + (Loc => Loc, + Typ => Etype (Typ), + Decl => Decl, + Fnam => Fnam); + return; end if; - -- If we do not have to output the current parameter, then - -- it can well be flagged as constant. This may allow further - -- optimizations done by the back end. + Fnam := Make_Helper_Function_Name (Loc, Typ, Name_To_Any); - Append_To (Decls, + Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Expr_Parameter, + Parameter_Type => New_Occurrence_Of (Typ, Loc))), + Result_Definition => New_Occurrence_Of (RTE (RE_Any), Loc)); + Set_Etype (Expr_Parameter, Typ); + + Any_Decl := Make_Object_Declaration (Loc, - Defining_Identifier => Object, - Constant_Present => - not Constrained and then not Out_Present (Current_Parameter), - Object_Definition => - New_Occurrence_Of (Etyp, Loc), - Expression => Expr)); - - -- An out parameter may be written back using a 'Write - -- attribute instead of a 'Output because it has been - -- constrained by the parameter given to the caller. Note that - -- out controlling arguments in the case of a RACW are not put - -- back in the stream because the pointer on them has not - -- changed. - - if Out_Present (Current_Parameter) - and then - Etype (Parameter_Type (Current_Parameter)) /= Stub_Type - then - Append_To (After_Statements, - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Etyp, Loc), - Attribute_Name => Name_Write, - Expressions => New_List ( - New_Occurrence_Of (Result_Parameter, Loc), - New_Occurrence_Of (Object, Loc)))); - end if; + Defining_Identifier => Any, + Object_Definition => New_Occurrence_Of (RTE (RE_Any), Loc)); + + Use_Opaque_Representation := False; - if - Is_RACW_Controlling_Formal (Current_Parameter, Stub_Type) + if Has_Stream_Attribute_Definition + (Typ, TSS_Stream_Output, At_Any_Place => True) + or else + Has_Stream_Attribute_Definition + (Typ, TSS_Stream_Write, At_Any_Place => True) then + -- If user-defined stream attributes are specified for this + -- type, use them and transmit data as an opaque sequence of + -- stream elements. + + Use_Opaque_Representation := True; + + elsif Is_Derived_Type (Typ) and then not Is_Tagged_Type (Typ) then + + -- Non-tagged derived type: convert to root type + + declare + Rt_Type : constant Entity_Id := Root_Type (Typ); + Expr : constant Node_Id := + OK_Convert_To + (Rt_Type, + New_Occurrence_Of (Expr_Parameter, Loc)); + begin + Set_Expression (Any_Decl, Build_To_Any_Call (Expr, Decls)); + end; + + elsif Is_Record_Type (Typ) and then not Is_Tagged_Type (Typ) then + + -- Non-tagged record type + + if Nkind (Declaration_Node (Typ)) = N_Subtype_Declaration then + declare + Rt_Type : constant Entity_Id := Etype (Typ); + Expr : constant Node_Id := + OK_Convert_To (Rt_Type, + New_Occurrence_Of (Expr_Parameter, Loc)); + + begin + Set_Expression + (Any_Decl, Build_To_Any_Call (Expr, Decls)); + end; + + -- Comment needed here (and label on declare block ???) - if Nkind (Parameter_Type (Current_Parameter)) /= - N_Access_Definition - then - Append_To (Parameter_List, - Make_Parameter_Association (Loc, - Selector_Name => - New_Occurrence_Of ( - Defining_Identifier (Current_Parameter), Loc), - Explicit_Actual_Parameter => - Make_Explicit_Dereference (Loc, - Unchecked_Convert_To (RACW_Type, - OK_Convert_To (RTE (RE_Address), - New_Occurrence_Of (Object, Loc)))))); else - Append_To (Parameter_List, - Make_Parameter_Association (Loc, - Selector_Name => - New_Occurrence_Of ( - Defining_Identifier (Current_Parameter), Loc), - Explicit_Actual_Parameter => - Unchecked_Convert_To (RACW_Type, - OK_Convert_To (RTE (RE_Address), - New_Occurrence_Of (Object, Loc))))); + declare + Disc : Entity_Id := Empty; + Rdef : constant Node_Id := + Type_Definition (Declaration_Node (Typ)); + Counter : Int := 0; + Elements : constant List_Id := New_List; + + procedure TA_Rec_Add_Process_Element + (Stmts : List_Id; + Container : Node_Or_Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id); + -- Processing routine for traversal below + + procedure TA_Append_Record_Traversal is + new Append_Record_Traversal + (Rec => Expr_Parameter, + Add_Process_Element => TA_Rec_Add_Process_Element); + + -------------------------------- + -- TA_Rec_Add_Process_Element -- + -------------------------------- + + procedure TA_Rec_Add_Process_Element + (Stmts : List_Id; + Container : Node_Or_Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id) + is + Field_Ref : Node_Id; + + begin + if Nkind (Field) = N_Defining_Identifier then + + -- A regular component + + Field_Ref := Make_Selected_Component (Loc, + Prefix => New_Occurrence_Of (Rec, Loc), + Selector_Name => New_Occurrence_Of (Field, Loc)); + Set_Etype (Field_Ref, Etype (Field)); + + Append_To (Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Container, Loc), + Build_To_Any_Call (Field_Ref, Decls)))); + + else + -- A variant part + + Variant_Part : declare + Variant : Node_Id; + Struct_Counter : Int := 0; + + Block_Decls : constant List_Id := New_List; + Block_Stmts : constant List_Id := New_List; + VP_Stmts : List_Id; + + Alt_List : constant List_Id := New_List; + Choice_List : List_Id; + + Union_Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('V')); + + Struct_Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('S')); + + function Make_Discriminant_Reference + return Node_Id; + -- Build reference to the discriminant for this + -- variant part. + + --------------------------------- + -- Make_Discriminant_Reference -- + --------------------------------- + + function Make_Discriminant_Reference + return Node_Id + is + Nod : constant Node_Id := + Make_Selected_Component (Loc, + Prefix => Rec, + Selector_Name => + Chars (Name (Field))); + begin + Set_Etype (Nod, Etype (Name (Field))); + return Nod; + end Make_Discriminant_Reference; + + -- Start processing for Variant_Part + + begin + Append_To (Stmts, + Make_Block_Statement (Loc, + Declarations => + Block_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Block_Stmts))); + + -- Declare variant part aggregate (Union_Any). + -- Knowing the position of this VP in the + -- variant record, we can fetch the VP typecode + -- from Container. + + Append_To (Block_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Union_Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + Make_Function_Call (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Any_Member_Type), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Container, Loc), + Make_Integer_Literal (Loc, + Counter))))))); + + -- Declare inner struct aggregate (which + -- contains the components of this VP). + + Append_To (Block_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Struct_Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + Make_Function_Call (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Any_Member_Type), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Union_Any, Loc), + Make_Integer_Literal (Loc, + Uint_1))))))); + + -- Build case statement + + Append_To (Block_Stmts, + Make_Case_Statement (Loc, + Expression => Make_Discriminant_Reference, + Alternatives => Alt_List)); + + Variant := First_Non_Pragma (Variants (Field)); + while Present (Variant) loop + Choice_List := New_Copy_List_Tree + (Discrete_Choices (Variant)); + + VP_Stmts := New_List; + + -- Append discriminant val to union aggregate + + Append_To (VP_Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Union_Any, Loc), + Build_To_Any_Call + (Make_Discriminant_Reference, + Block_Decls)))); + + -- Populate inner struct aggregate + + -- Struct_Counter should be reset before + -- handling a variant part. Indeed only one + -- of the case statement alternatives will be + -- executed at run-time, so the counter must + -- start at 0 for every case statement. + + Struct_Counter := 0; + + TA_Append_Record_Traversal ( + Stmts => VP_Stmts, + Clist => Component_List (Variant), + Container => Struct_Any, + Counter => Struct_Counter); + + -- Append inner struct to union aggregate + + Append_To (VP_Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Union_Any, Loc), + New_Occurrence_Of (Struct_Any, Loc)))); + + -- Append union to outer aggregate + + Append_To (VP_Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Container, Loc), + New_Occurrence_Of + (Union_Any, Loc)))); + + Append_To (Alt_List, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => Choice_List, + Statements => VP_Stmts)); + + Next_Non_Pragma (Variant); + end loop; + end Variant_Part; + end if; + + Counter := Counter + 1; + end TA_Rec_Add_Process_Element; + + begin + -- Records are encoded in a TC_STRUCT aggregate: + + -- -- Outer aggregate (TC_STRUCT) + -- | [discriminant1] + -- | [discriminant2] + -- | ... + -- | + -- | [component1] + -- | [component2] + -- | ... + + -- A component can be a common component or variant part + + -- A variant part is encoded as a TC_UNION aggregate: + + -- -- Variant Part Aggregate (TC_UNION) + -- | [discriminant choice for this Variant Part] + -- | + -- | -- Inner struct (TC_STRUCT) + -- | | [component1] + -- | | [component2] + -- | | ... + + -- Let's start by building the outer aggregate. First we + -- construct Elements array containing all discriminants. + + if Has_Discriminants (Typ) then + Disc := First_Discriminant (Typ); + while Present (Disc) loop + declare + Discriminant : constant Entity_Id := + Make_Selected_Component (Loc, + Prefix => + Expr_Parameter, + Selector_Name => + Chars (Disc)); + + begin + Set_Etype (Discriminant, Etype (Disc)); + + Append_To (Elements, + Make_Component_Association (Loc, + Choices => New_List ( + Make_Integer_Literal (Loc, Counter)), + Expression => + Build_To_Any_Call (Discriminant, Decls))); + end; + + Counter := Counter + 1; + Next_Discriminant (Disc); + end loop; + + else + -- If there are no discriminants, we declare an empty + -- Elements array. + + declare + Dummy_Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('A')); + + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Dummy_Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc))); + + Append_To (Elements, + Make_Component_Association (Loc, + Choices => New_List ( + Make_Range (Loc, + Low_Bound => + Make_Integer_Literal (Loc, 1), + High_Bound => + Make_Integer_Literal (Loc, 0))), + Expression => + New_Occurrence_Of (Dummy_Any, Loc))); + end; + end if; + + -- We build the result aggregate with discriminants + -- as the first elements. + + Set_Expression (Any_Decl, + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Any_Aggregate_Build), Loc), + Parameter_Associations => New_List ( + Result_TC, + Make_Aggregate (Loc, + Component_Associations => Elements)))); + Result_TC := Empty; + + -- Then we append all the components to the result + -- aggregate. + + TA_Append_Record_Traversal (Stms, + Clist => Component_List (Rdef), + Container => Any, + Counter => Counter); + end; end if; - else - Append_To (Parameter_List, - Make_Parameter_Association (Loc, - Selector_Name => - New_Occurrence_Of ( - Defining_Identifier (Current_Parameter), Loc), - Explicit_Actual_Parameter => - New_Occurrence_Of (Object, Loc))); - end if; - -- If the current parameter needs an extra formal, then read it - -- from the stream and set the corresponding semantic field in - -- the variable. If the kind of the parameter identifier is - -- E_Void, then this is a compiler generated parameter that - -- doesn't need an extra constrained status. + elsif Is_Array_Type (Typ) then - -- The case of Extra_Accessibility should also be handled ??? + -- Constrained and unconstrained array types - if Nkind (Parameter_Type (Current_Parameter)) /= - N_Access_Definition - and then - Ekind (Defining_Identifier (Current_Parameter)) /= E_Void - and then - Present (Extra_Constrained - (Defining_Identifier (Current_Parameter))) - then declare - Extra_Parameter : constant Entity_Id := - Extra_Constrained - (Defining_Identifier - (Current_Parameter)); + Constrained : constant Boolean := Is_Constrained (Typ); + + procedure TA_Ary_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id; + Datum : Node_Id); + + -------------------------------- + -- TA_Ary_Add_Process_Element -- + -------------------------------- + + procedure TA_Ary_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id; + Datum : Node_Id) + is + pragma Warnings (Off); + pragma Unreferenced (Counter); + pragma Warnings (On); + + Element_Any : Node_Id; + + begin + if Etype (Datum) = RTE (RE_Any) then + Element_Any := Datum; + else + Element_Any := Build_To_Any_Call (Datum, Decls); + end if; + + Append_To (Stmts, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Element_Any))); + end TA_Ary_Add_Process_Element; + + procedure Append_To_Any_Array_Iterator is + new Append_Array_Traversal ( + Subprogram => Fnam, + Arry => Expr_Parameter, + Indices => New_List, + Add_Process_Element => TA_Ary_Add_Process_Element); + + Index : Node_Id; + + begin + Set_Expression (Any_Decl, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List (Result_TC))); + Result_TC := Empty; + + if not Constrained then + Index := First_Index (Typ); + for J in 1 .. Number_Dimensions (Typ) loop + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Build_To_Any_Call ( + OK_Convert_To (Etype (Index), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Expr_Parameter, Loc), + Attribute_Name => Name_First, + Expressions => New_List ( + Make_Integer_Literal (Loc, J)))), + Decls)))); + Next_Index (Index); + end loop; + end if; + + Append_To_Any_Array_Iterator (Stms, Any); + end; + + elsif Is_Integer_Type (Typ) or else Is_Unsigned_Type (Typ) then - Formal_Entity : constant Entity_Id := - Make_Defining_Identifier - (Loc, Chars (Extra_Parameter)); + -- Integer types - Formal_Type : constant Entity_Id := - Etype (Extra_Parameter); + Set_Expression (Any_Decl, + Build_To_Any_Call ( + OK_Convert_To ( + Find_Numeric_Representation (Typ), + New_Occurrence_Of (Expr_Parameter, Loc)), + Decls)); + + else + -- Default case, including tagged types: opaque representation + + Use_Opaque_Representation := True; + end if; + + if Use_Opaque_Representation then + declare + Strm : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('S')); + -- Stream used to store data representation produced by + -- stream attribute. begin + -- Generate: + -- Strm : aliased Buffer_Stream_Type; + Append_To (Decls, Make_Object_Declaration (Loc, - Defining_Identifier => Formal_Entity, + Defining_Identifier => + Strm, + Aliased_Present => + True, Object_Definition => - New_Occurrence_Of (Formal_Type, Loc))); + New_Occurrence_Of (RTE (RE_Buffer_Stream_Type), Loc))); - Append_To (Extra_Formal_Statements, - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Formal_Type, Loc), - Attribute_Name => Name_Read, - Expressions => New_List ( - New_Occurrence_Of (Stream_Parameter, Loc), - New_Occurrence_Of (Formal_Entity, Loc)))); - Set_Extra_Constrained (Object, Formal_Entity); - end; - end if; - end; - - Next (Current_Parameter); - end loop; - - -- Append the formal statements list at the end of regular statements + -- Generate: + -- Allocate_Buffer (Strm); - Append_List_To (Statements, Extra_Formal_Statements); + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Allocate_Buffer), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Strm, Loc)))); - if Nkind (Specification (Vis_Decl)) = N_Function_Specification then + -- Generate: + -- T'Output (Strm'Access, E); - -- The remote subprogram is a function. We build an inner block to - -- be able to hold a potentially unconstrained result in a variable. + Append_To (Stms, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Typ, Loc), + Attribute_Name => Name_Output, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Strm, Loc), + Attribute_Name => Name_Access), + New_Occurrence_Of (Expr_Parameter, Loc)))); + + -- Generate: + -- BS_To_Any (Strm, A); + + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_BS_To_Any), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Strm, Loc), + New_Occurrence_Of (Any, Loc)))); - declare - Etyp : constant Entity_Id := - Etype (Subtype_Mark (Specification (Vis_Decl))); - Result : constant Node_Id := - Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + -- Generate: + -- Release_Buffer (Strm); - begin - Inner_Decls := New_List ( - Make_Object_Declaration (Loc, - Defining_Identifier => Result, - Constant_Present => True, - Object_Definition => New_Occurrence_Of (Etyp, Loc), - Expression => - Make_Function_Call (Loc, - Name => Called_Subprogram, - Parameter_Associations => Parameter_List))); + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Release_Buffer), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Strm, Loc)))); + end; + end if; - Append_To (After_Statements, - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Etyp, Loc), - Attribute_Name => Name_Output, - Expressions => New_List ( - New_Occurrence_Of (Result_Parameter, Loc), - New_Occurrence_Of (Result, Loc)))); - end; + Append_To (Decls, Any_Decl); - Append_To (Statements, - Make_Block_Statement (Loc, - Declarations => Inner_Decls, - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, - Statements => After_Statements))); + if Present (Result_TC) then + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Set_TC), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Result_TC))); + end if; - else - -- The remote subprogram is a procedure. We do not need any inner - -- block in this case. + Append_To (Stms, + Make_Simple_Return_Statement (Loc, + Expression => New_Occurrence_Of (Any, Loc))); + + Decl := + Make_Subprogram_Body (Loc, + Specification => Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stms)); + end Build_To_Any_Function; + + ------------------------- + -- Build_TypeCode_Call -- + ------------------------- + + function Build_TypeCode_Call + (Loc : Source_Ptr; + Typ : Entity_Id; + Decls : List_Id) return Node_Id + is + U_Type : Entity_Id := Underlying_Type (Typ); + -- The full view, if Typ is private; the completion, + -- if Typ is incomplete. + + Fnam : Entity_Id := Empty; + Lib_RE : RE_Id := RE_Null; + Expr : Node_Id; - if Dynamically_Asynchronous then - Append_To (Decls, - Make_Object_Declaration (Loc, - Defining_Identifier => Dynamic_Async, - Object_Definition => - New_Occurrence_Of (Standard_Boolean, Loc))); + begin + -- Special case System.PolyORB.Interface.Any: its primitives have + -- not been set yet, so can't call Find_Inherited_TSS. - Append_To (Statements, - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Standard_Boolean, Loc), - Attribute_Name => Name_Read, - Expressions => New_List ( - New_Occurrence_Of (Stream_Parameter, Loc), - New_Occurrence_Of (Dynamic_Async, Loc)))); - end if; + if Typ = RTE (RE_Any) then + Fnam := RTE (RE_TC_A); - Append_To (Statements, - Make_Procedure_Call_Statement (Loc, - Name => Called_Subprogram, - Parameter_Associations => Parameter_List)); + else + -- First simple case where the TypeCode is present + -- in the type's TSS. - Append_List_To (Statements, After_Statements); + Fnam := Find_Inherited_TSS (U_Type, TSS_TypeCode); + end if; - end if; + if No (Fnam) then + if Sloc (U_Type) <= Standard_Location then - if Asynchronous and then not Dynamically_Asynchronous then + -- Do not try to build alias typecodes for subtypes from + -- Standard. - -- An asynchronous procedure does not want a Result - -- parameter. Also, we put an exception handler with an others - -- clause that does nothing. + U_Type := Base_Type (U_Type); + end if; - Subp_Spec := - Make_Procedure_Specification (Loc, - Defining_Unit_Name => - Make_Defining_Identifier (Loc, New_Internal_Name ('F')), - Parameter_Specifications => New_List ( - Make_Parameter_Specification (Loc, - Defining_Identifier => Stream_Parameter, - Parameter_Type => - Make_Access_Definition (Loc, - Subtype_Mark => - New_Occurrence_Of (RTE (RE_Params_Stream_Type), Loc))))); + if U_Type = Standard_Boolean then + Lib_RE := RE_TC_B; - Excep_Handler := - Make_Exception_Handler (Loc, - Exception_Choices => - New_List (Make_Others_Choice (Loc)), - Statements => New_List ( - Make_Null_Statement (Loc))); + elsif U_Type = Standard_Character then + Lib_RE := RE_TC_C; - else - -- In the other cases, if an exception is raised, then the - -- exception occurrence is copied into the output stream and - -- no other output parameter is written. + elsif U_Type = Standard_Wide_Character then + Lib_RE := RE_TC_WC; - Excep_Choice := - Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + elsif U_Type = Standard_Wide_Wide_Character then + Lib_RE := RE_TC_WWC; - Excep_Code := New_List ( - Make_Attribute_Reference (Loc, - Prefix => - New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc), - Attribute_Name => Name_Write, - Expressions => New_List ( - New_Occurrence_Of (Result_Parameter, Loc), - New_Occurrence_Of (Excep_Choice, Loc)))); + -- Floating point types - if Dynamically_Asynchronous then - Excep_Code := New_List ( - Make_Implicit_If_Statement (Vis_Decl, - Condition => Make_Op_Not (Loc, - New_Occurrence_Of (Dynamic_Async, Loc)), - Then_Statements => Excep_Code)); - end if; + elsif U_Type = Standard_Short_Float then + Lib_RE := RE_TC_SF; - Excep_Handler := - Make_Exception_Handler (Loc, - Choice_Parameter => Excep_Choice, - Exception_Choices => New_List (Make_Others_Choice (Loc)), - Statements => Excep_Code); + elsif U_Type = Standard_Float then + Lib_RE := RE_TC_F; - Subp_Spec := - Make_Procedure_Specification (Loc, - Defining_Unit_Name => - Make_Defining_Identifier (Loc, New_Internal_Name ('F')), + elsif U_Type = Standard_Long_Float then + Lib_RE := RE_TC_LF; - Parameter_Specifications => New_List ( - Make_Parameter_Specification (Loc, - Defining_Identifier => Stream_Parameter, - Parameter_Type => - Make_Access_Definition (Loc, - Subtype_Mark => - New_Occurrence_Of (RTE (RE_Params_Stream_Type), Loc))), + elsif U_Type = Standard_Long_Long_Float then + Lib_RE := RE_TC_LLF; - Make_Parameter_Specification (Loc, - Defining_Identifier => Result_Parameter, - Parameter_Type => - Make_Access_Definition (Loc, - Subtype_Mark => - New_Occurrence_Of (RTE (RE_Params_Stream_Type), Loc))))); - end if; + -- Integer types (walk back to the base type) - return - Make_Subprogram_Body (Loc, - Specification => Subp_Spec, - Declarations => Decls, - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, - Statements => Statements, - Exception_Handlers => New_List (Excep_Handler))); + elsif U_Type = Etype (Standard_Short_Short_Integer) then + Lib_RE := RE_TC_SSI; - end Build_Subprogram_Receiving_Stubs; + elsif U_Type = Etype (Standard_Short_Integer) then + Lib_RE := RE_TC_SI; - ------------------------ - -- Copy_Specification -- - ------------------------ + elsif U_Type = Etype (Standard_Integer) then + Lib_RE := RE_TC_I; - function Copy_Specification - (Loc : Source_Ptr; - Spec : Node_Id; - Object_Type : Entity_Id := Empty; - Stub_Type : Entity_Id := Empty; - New_Name : Name_Id := No_Name) - return Node_Id - is - Parameters : List_Id := No_List; + elsif U_Type = Etype (Standard_Long_Integer) then + Lib_RE := RE_TC_LI; - Current_Parameter : Node_Id; - Current_Type : Node_Id; - Current_Etype : Entity_Id; + elsif U_Type = Etype (Standard_Long_Long_Integer) then + Lib_RE := RE_TC_LLI; - Name_For_New_Spec : Name_Id; + -- Unsigned integer types - New_Identifier : Entity_Id; + elsif U_Type = RTE (RE_Short_Short_Unsigned) then + Lib_RE := RE_TC_SSU; - begin - if New_Name = No_Name then - Name_For_New_Spec := Chars (Defining_Unit_Name (Spec)); - else - Name_For_New_Spec := New_Name; - end if; + elsif U_Type = RTE (RE_Short_Unsigned) then + Lib_RE := RE_TC_SU; - if Present (Parameter_Specifications (Spec)) then + elsif U_Type = RTE (RE_Unsigned) then + Lib_RE := RE_TC_U; - Parameters := New_List; - Current_Parameter := First (Parameter_Specifications (Spec)); + elsif U_Type = RTE (RE_Long_Unsigned) then + Lib_RE := RE_TC_LU; - while Current_Parameter /= Empty loop + elsif U_Type = RTE (RE_Long_Long_Unsigned) then + Lib_RE := RE_TC_LLU; - Current_Type := Parameter_Type (Current_Parameter); + elsif U_Type = Standard_String then + Lib_RE := RE_TC_String; - if Nkind (Current_Type) = N_Access_Definition then - Current_Etype := Entity (Subtype_Mark (Current_Type)); + -- Special DSA types - if Object_Type = Empty then - Current_Type := - Make_Access_Definition (Loc, - Subtype_Mark => - New_Occurrence_Of (Current_Etype, Loc)); - else - pragma Assert - (Root_Type (Current_Etype) = Root_Type (Object_Type)); - Current_Type := - Make_Access_Definition (Loc, - Subtype_Mark => New_Occurrence_Of (Stub_Type, Loc)); - end if; + elsif Is_RTE (U_Type, RE_Any_Content_Ptr) then + Lib_RE := RE_TC_A; - else - Current_Etype := Entity (Current_Type); + -- Other (non-primitive) types - if Object_Type /= Empty - and then Current_Etype = Object_Type - then - Current_Type := New_Occurrence_Of (Stub_Type, Loc); else - Current_Type := New_Occurrence_Of (Current_Etype, Loc); + declare + Decl : Entity_Id; + begin + Build_TypeCode_Function (Loc, U_Type, Decl, Fnam); + Append_To (Decls, Decl); + end; + end if; + + if Lib_RE /= RE_Null then + Fnam := RTE (Lib_RE); end if; end if; - New_Identifier := Make_Defining_Identifier (Loc, - Chars (Defining_Identifier (Current_Parameter))); + -- Call the function - Append_To (Parameters, - Make_Parameter_Specification (Loc, - Defining_Identifier => New_Identifier, - Parameter_Type => Current_Type, - In_Present => In_Present (Current_Parameter), - Out_Present => Out_Present (Current_Parameter), - Expression => - New_Copy_Tree (Expression (Current_Parameter)))); + Expr := + Make_Function_Call (Loc, Name => New_Occurrence_Of (Fnam, Loc)); - Next (Current_Parameter); - end loop; - end if; + -- Allow Expr to be used as arg to Build_To_Any_Call immediately - if Nkind (Spec) = N_Function_Specification then - return - Make_Function_Specification (Loc, - Defining_Unit_Name => - Make_Defining_Identifier (Loc, - Chars => Name_For_New_Spec), - Parameter_Specifications => Parameters, - Subtype_Mark => - New_Occurrence_Of (Entity (Subtype_Mark (Spec)), Loc)); + Set_Etype (Expr, RTE (RE_TypeCode)); - else - return - Make_Procedure_Specification (Loc, - Defining_Unit_Name => - Make_Defining_Identifier (Loc, - Chars => Name_For_New_Spec), - Parameter_Specifications => Parameters); - end if; + return Expr; + end Build_TypeCode_Call; - end Copy_Specification; + ----------------------------- + -- Build_TypeCode_Function -- + ----------------------------- - --------------------------- - -- Could_Be_Asynchronous -- - --------------------------- + procedure Build_TypeCode_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id) + is + Spec : Node_Id; + Decls : constant List_Id := New_List; + Stms : constant List_Id := New_List; - function Could_Be_Asynchronous (Spec : Node_Id) return Boolean is - Current_Parameter : Node_Id; + TCNam : constant Entity_Id := + Make_Helper_Function_Name (Loc, Typ, Name_TypeCode); - begin - if Present (Parameter_Specifications (Spec)) then - Current_Parameter := First (Parameter_Specifications (Spec)); - while Current_Parameter /= Empty loop - if Out_Present (Current_Parameter) then - return False; - end if; + Parameters : List_Id; - Next (Current_Parameter); - end loop; - end if; + procedure Add_String_Parameter + (S : String_Id; + Parameter_List : List_Id); + -- Add a literal for S to Parameters - return True; - end Could_Be_Asynchronous; + procedure Add_TypeCode_Parameter + (TC_Node : Node_Id; + Parameter_List : List_Id); + -- Add the typecode for Typ to Parameters - --------------------------------------------- - -- Expand_All_Calls_Remote_Subprogram_Call -- - --------------------------------------------- + procedure Add_Long_Parameter + (Expr_Node : Node_Id; + Parameter_List : List_Id); + -- Add a signed long integer expression to Parameters - procedure Expand_All_Calls_Remote_Subprogram_Call (N : in Node_Id) is - Called_Subprogram : constant Entity_Id := Entity (Name (N)); - RCI_Package : constant Entity_Id := Scope (Called_Subprogram); - Loc : constant Source_Ptr := Sloc (N); - RCI_Locator : Node_Id; - RCI_Cache : Entity_Id; - Calling_Stubs : Node_Id; - E_Calling_Stubs : Entity_Id; + procedure Initialize_Parameter_List + (Name_String : String_Id; + Repo_Id_String : String_Id; + Parameter_List : out List_Id); + -- Return a list that contains the first two parameters + -- for a parameterized typecode: name and repository id. - begin - E_Calling_Stubs := RCI_Calling_Stubs_Table.Get (Called_Subprogram); + function Make_Constructed_TypeCode + (Kind : Entity_Id; + Parameters : List_Id) return Node_Id; + -- Call TC_Build with the given kind and parameters - if E_Calling_Stubs = Empty then - RCI_Cache := RCI_Locator_Table.Get (RCI_Package); + procedure Return_Constructed_TypeCode (Kind : Entity_Id); + -- Make a return statement that calls TC_Build with the given + -- typecode kind, and the constructed parameters list. - if RCI_Cache = Empty then - RCI_Locator := - RCI_Package_Locator - (Loc, Specification (Unit_Declaration_Node (RCI_Package))); - Prepend_To (Current_Sem_Unit_Declarations, RCI_Locator); + procedure Return_Alias_TypeCode (Base_TypeCode : Node_Id); + -- Return a typecode that is a TC_Alias for the given typecode - -- The RCI_Locator package is inserted at the top level in the - -- current unit, and must appear in the proper scope, so that it - -- is not prematurely removed by the GCC back-end. + -------------------------- + -- Add_String_Parameter -- + -------------------------- - declare - Scop : constant Entity_Id := Cunit_Entity (Current_Sem_Unit); + procedure Add_String_Parameter + (S : String_Id; + Parameter_List : List_Id) + is + begin + Append_To (Parameter_List, + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_TA_String), Loc), + Parameter_Associations => New_List ( + Make_String_Literal (Loc, S)))); + end Add_String_Parameter; + + ---------------------------- + -- Add_TypeCode_Parameter -- + ---------------------------- + + procedure Add_TypeCode_Parameter + (TC_Node : Node_Id; + Parameter_List : List_Id) + is + begin + Append_To (Parameter_List, + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_TA_TC), Loc), + Parameter_Associations => New_List (TC_Node))); + end Add_TypeCode_Parameter; + + ------------------------ + -- Add_Long_Parameter -- + ------------------------ + + procedure Add_Long_Parameter + (Expr_Node : Node_Id; + Parameter_List : List_Id) + is + begin + Append_To (Parameter_List, + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_TA_LI), Loc), + Parameter_Associations => New_List (Expr_Node))); + end Add_Long_Parameter; + + ------------------------------- + -- Initialize_Parameter_List -- + ------------------------------- + + procedure Initialize_Parameter_List + (Name_String : String_Id; + Repo_Id_String : String_Id; + Parameter_List : out List_Id) + is + begin + Parameter_List := New_List; + Add_String_Parameter (Name_String, Parameter_List); + Add_String_Parameter (Repo_Id_String, Parameter_List); + end Initialize_Parameter_List; + + --------------------------- + -- Return_Alias_TypeCode -- + --------------------------- + + procedure Return_Alias_TypeCode + (Base_TypeCode : Node_Id) + is + begin + Add_TypeCode_Parameter (Base_TypeCode, Parameters); + Return_Constructed_TypeCode (RTE (RE_TC_Alias)); + end Return_Alias_TypeCode; + + ------------------------------- + -- Make_Constructed_TypeCode -- + ------------------------------- + + function Make_Constructed_TypeCode + (Kind : Entity_Id; + Parameters : List_Id) return Node_Id + is + Constructed_TC : constant Node_Id := + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_TC_Build), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Kind, Loc), + Make_Aggregate (Loc, + Expressions => Parameters))); + begin + Set_Etype (Constructed_TC, RTE (RE_TypeCode)); + return Constructed_TC; + end Make_Constructed_TypeCode; + --------------------------------- + -- Return_Constructed_TypeCode -- + --------------------------------- + + procedure Return_Constructed_TypeCode (Kind : Entity_Id) is begin - if Ekind (Scop) = E_Package_Body then - New_Scope (Spec_Entity (Scop)); + Append_To (Stms, + Make_Simple_Return_Statement (Loc, + Expression => + Make_Constructed_TypeCode (Kind, Parameters))); + end Return_Constructed_TypeCode; + + ------------------ + -- Record types -- + ------------------ + + procedure TC_Rec_Add_Process_Element + (Params : List_Id; + Any : Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id); + + procedure TC_Append_Record_Traversal is + new Append_Record_Traversal ( + Rec => Empty, + Add_Process_Element => TC_Rec_Add_Process_Element); + + -------------------------------- + -- TC_Rec_Add_Process_Element -- + -------------------------------- + + procedure TC_Rec_Add_Process_Element + (Params : List_Id; + Any : Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id) + is + pragma Warnings (Off); + pragma Unreferenced (Any, Counter, Rec); + pragma Warnings (On); - elsif Ekind (Scop) = E_Subprogram_Body then - New_Scope - (Corresponding_Spec (Unit_Declaration_Node (Scop))); + begin + if Nkind (Field) = N_Defining_Identifier then + + -- A regular component + + Add_TypeCode_Parameter + (Build_TypeCode_Call (Loc, Etype (Field), Decls), Params); + Get_Name_String (Chars (Field)); + Add_String_Parameter (String_From_Name_Buffer, Params); else - New_Scope (Scop); + + -- A variant part + + declare + Discriminant_Type : constant Entity_Id := + Etype (Name (Field)); + + Is_Enum : constant Boolean := + Is_Enumeration_Type (Discriminant_Type); + + Union_TC_Params : List_Id; + + U_Name : constant Name_Id := + New_External_Name (Chars (Typ), 'V', -1); + + Name_Str : String_Id; + Struct_TC_Params : List_Id; + + Variant : Node_Id; + Choice : Node_Id; + Default : constant Node_Id := + Make_Integer_Literal (Loc, -1); + + Dummy_Counter : Int := 0; + + Choice_Index : Int := 0; + + procedure Add_Params_For_Variant_Components; + -- Add a struct TypeCode and a corresponding member name + -- to the union parameter list. + + -- Ordering of declarations is a complete mess in this + -- area, it is supposed to be types/varibles, then + -- subprogram specs, then subprogram bodies ??? + + --------------------------------------- + -- Add_Params_For_Variant_Components -- + --------------------------------------- + + procedure Add_Params_For_Variant_Components + is + S_Name : constant Name_Id := + New_External_Name (U_Name, 'S', -1); + + begin + Get_Name_String (S_Name); + Name_Str := String_From_Name_Buffer; + Initialize_Parameter_List + (Name_Str, Name_Str, Struct_TC_Params); + + -- Build struct parameters + + TC_Append_Record_Traversal (Struct_TC_Params, + Component_List (Variant), + Empty, + Dummy_Counter); + + Add_TypeCode_Parameter + (Make_Constructed_TypeCode + (RTE (RE_TC_Struct), Struct_TC_Params), + Union_TC_Params); + + Add_String_Parameter (Name_Str, Union_TC_Params); + end Add_Params_For_Variant_Components; + + begin + Get_Name_String (U_Name); + Name_Str := String_From_Name_Buffer; + + Initialize_Parameter_List + (Name_Str, Name_Str, Union_TC_Params); + + -- Add union in enclosing parameter list + + Add_TypeCode_Parameter + (Make_Constructed_TypeCode + (RTE (RE_TC_Union), Union_TC_Params), + Params); + + Add_String_Parameter (Name_Str, Params); + + -- Build union parameters + + Add_TypeCode_Parameter + (Build_TypeCode_Call + (Loc, Discriminant_Type, Decls), + Union_TC_Params); + + Add_Long_Parameter (Default, Union_TC_Params); + + Variant := First_Non_Pragma (Variants (Field)); + while Present (Variant) loop + Choice := First (Discrete_Choices (Variant)); + while Present (Choice) loop + case Nkind (Choice) is + when N_Range => + declare + L : constant Uint := + Expr_Value (Low_Bound (Choice)); + H : constant Uint := + Expr_Value (High_Bound (Choice)); + J : Uint := L; + -- 3.8.1(8) guarantees that the bounds of + -- this range are static. + + Expr : Node_Id; + + begin + while J <= H loop + if Is_Enum then + Expr := New_Occurrence_Of ( + Get_Enum_Lit_From_Pos ( + Discriminant_Type, J, Loc), Loc); + else + Expr := + Make_Integer_Literal (Loc, J); + end if; + Append_To (Union_TC_Params, + Build_To_Any_Call (Expr, Decls)); + + Add_Params_For_Variant_Components; + J := J + Uint_1; + end loop; + end; + + when N_Others_Choice => + + -- This variant possess a default choice. + -- We must therefore set the default + -- parameter to the current choice index. The + -- default parameter is by construction the + -- fourth in the Union_TC_Params list. + + declare + Default_Node : constant Node_Id := + Pick (Union_TC_Params, 4); + + New_Default_Node : constant Node_Id := + Make_Function_Call (Loc, + Name => + New_Occurrence_Of + (RTE (RE_TA_LI), Loc), + Parameter_Associations => + New_List ( + Make_Integer_Literal + (Loc, Choice_Index))); + begin + Insert_Before ( + Default_Node, + New_Default_Node); + + Remove (Default_Node); + end; + + -- Add a placeholder member label + -- for the default case. + -- It must be of the discriminant type. + + declare + Exp : constant Node_Id := + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of + (Discriminant_Type, Loc), + Attribute_Name => Name_First); + begin + Set_Etype (Exp, Discriminant_Type); + Append_To (Union_TC_Params, + Build_To_Any_Call (Exp, Decls)); + end; + + Add_Params_For_Variant_Components; + + when others => + + -- Case of an explicit choice + + declare + Exp : constant Node_Id := + New_Copy_Tree (Choice); + begin + Append_To (Union_TC_Params, + Build_To_Any_Call (Exp, Decls)); + end; + + Add_Params_For_Variant_Components; + end case; + + Next (Choice); + Choice_Index := Choice_Index + 1; + end loop; + + Next_Non_Pragma (Variant); + end loop; + end; end if; + end TC_Rec_Add_Process_Element; - Analyze (RCI_Locator); - Pop_Scope; - end; + Type_Name_Str : String_Id; + Type_Repo_Id_Str : String_Id; - RCI_Cache := Defining_Unit_Name (RCI_Locator); + begin + if Is_Itype (Typ) then + Build_TypeCode_Function + (Loc => Loc, + Typ => Etype (Typ), + Decl => Decl, + Fnam => Fnam); + return; + end if; - else - RCI_Locator := Parent (RCI_Cache); - end if; + Fnam := TCNam; - Calling_Stubs := Build_Subprogram_Calling_Stubs - (Vis_Decl => Parent (Parent (Called_Subprogram)), - Subp_Id => Get_Subprogram_Id (Called_Subprogram), - Asynchronous => Nkind (N) = N_Procedure_Call_Statement - and then - Is_Asynchronous (Called_Subprogram), - Locator => RCI_Cache, - New_Name => New_Internal_Name ('S')); - Insert_After (RCI_Locator, Calling_Stubs); - Analyze (Calling_Stubs); - E_Calling_Stubs := Defining_Unit_Name (Specification (Calling_Stubs)); - end if; + Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Fnam, + Parameter_Specifications => Empty_List, + Result_Definition => + New_Occurrence_Of (RTE (RE_TypeCode), Loc)); - Rewrite (Name (N), New_Occurrence_Of (E_Calling_Stubs, Loc)); - end Expand_All_Calls_Remote_Subprogram_Call; + Build_Name_And_Repository_Id (Typ, + Name_Str => Type_Name_Str, Repo_Id_Str => Type_Repo_Id_Str); - --------------------------------- - -- Expand_Calling_Stubs_Bodies -- - --------------------------------- + Initialize_Parameter_List + (Type_Name_Str, Type_Repo_Id_Str, Parameters); - procedure Expand_Calling_Stubs_Bodies (Unit_Node : in Node_Id) is - Spec : constant Node_Id := Specification (Unit_Node); - Decls : constant List_Id := Visible_Declarations (Spec); + if Has_Stream_Attribute_Definition + (Typ, TSS_Stream_Output, At_Any_Place => True) + or else + Has_Stream_Attribute_Definition + (Typ, TSS_Stream_Write, At_Any_Place => True) + then + -- If user-defined stream attributes are specified for this + -- type, use them and transmit data as an opaque sequence of + -- stream elements. + + Return_Alias_TypeCode + (New_Occurrence_Of (RTE (RE_TC_Opaque), Loc)); + + elsif Is_Derived_Type (Typ) and then not Is_Tagged_Type (Typ) then + Return_Alias_TypeCode ( + Build_TypeCode_Call (Loc, Etype (Typ), Decls)); + + elsif Is_Integer_Type (Typ) or else Is_Unsigned_Type (Typ) then + Return_Alias_TypeCode ( + Build_TypeCode_Call (Loc, + Find_Numeric_Representation (Typ), Decls)); + + elsif Is_Record_Type (Typ) and then not Is_Tagged_Type (Typ) then + + -- Record typecodes are encoded as follows: + -- -- TC_STRUCT + -- | + -- | [Name] + -- | [Repository Id] + -- + -- Then for each discriminant: + -- + -- | [Discriminant Type Code] + -- | [Discriminant Name] + -- | ... + -- + -- Then for each component: + -- + -- | [Component Type Code] + -- | [Component Name] + -- | ... + -- + -- Variants components type codes are encoded as follows: + -- -- TC_UNION + -- | + -- | [Name] + -- | [Repository Id] + -- | [Discriminant Type Code] + -- | [Index of Default Variant Part or -1 for no default] + -- + -- Then for each Variant Part : + -- + -- | [VP Label] + -- | + -- | -- TC_STRUCT + -- | | [Variant Part Name] + -- | | [Variant Part Repository Id] + -- | | + -- | Then for each VP component: + -- | | [VP component Typecode] + -- | | [VP component Name] + -- | | ... + -- | -- + -- | + -- | [VP Name] + + if Nkind (Declaration_Node (Typ)) = N_Subtype_Declaration then + Return_Alias_TypeCode + (Build_TypeCode_Call (Loc, Etype (Typ), Decls)); - begin - New_Scope (Scope_Of_Spec (Spec)); - Add_Calling_Stubs_To_Declarations (Specification (Unit_Node), - Decls); - Pop_Scope; - end Expand_Calling_Stubs_Bodies; + else + declare + Disc : Entity_Id := Empty; + Rdef : constant Node_Id := + Type_Definition (Declaration_Node (Typ)); + Dummy_Counter : Int := 0; + + begin + -- Construct the discriminants typecodes + + if Has_Discriminants (Typ) then + Disc := First_Discriminant (Typ); + end if; + + while Present (Disc) loop + Add_TypeCode_Parameter ( + Build_TypeCode_Call (Loc, Etype (Disc), Decls), + Parameters); + Get_Name_String (Chars (Disc)); + Add_String_Parameter ( + String_From_Name_Buffer, + Parameters); + Next_Discriminant (Disc); + end loop; + + -- then the components typecodes + + TC_Append_Record_Traversal + (Parameters, Component_List (Rdef), + Empty, Dummy_Counter); + Return_Constructed_TypeCode (RTE (RE_TC_Struct)); + end; + end if; - ----------------------------------- - -- Expand_Receiving_Stubs_Bodies -- - ----------------------------------- + elsif Is_Array_Type (Typ) then + declare + Ndim : constant Pos := Number_Dimensions (Typ); + Inner_TypeCode : Node_Id; + Constrained : constant Boolean := Is_Constrained (Typ); + Indx : Node_Id := First_Index (Typ); - procedure Expand_Receiving_Stubs_Bodies (Unit_Node : in Node_Id) is - Spec : Node_Id; - Decls : List_Id; - Temp : List_Id; + begin + Inner_TypeCode := + Build_TypeCode_Call (Loc, Component_Type (Typ), Decls); + + for J in 1 .. Ndim loop + if Constrained then + Inner_TypeCode := Make_Constructed_TypeCode + (RTE (RE_TC_Array), New_List ( + Build_To_Any_Call ( + OK_Convert_To (RTE (RE_Long_Unsigned), + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Typ, Loc), + Attribute_Name => Name_Length, + Expressions => New_List ( + Make_Integer_Literal (Loc, + Intval => Ndim - J + 1)))), + Decls), + Build_To_Any_Call (Inner_TypeCode, Decls))); + + else + -- Unconstrained case: add low bound for each + -- dimension. + + Add_TypeCode_Parameter + (Build_TypeCode_Call (Loc, Etype (Indx), Decls), + Parameters); + Get_Name_String (New_External_Name ('L', J)); + Add_String_Parameter ( + String_From_Name_Buffer, + Parameters); + Next_Index (Indx); + + Inner_TypeCode := Make_Constructed_TypeCode + (RTE (RE_TC_Sequence), New_List ( + Build_To_Any_Call ( + OK_Convert_To (RTE (RE_Long_Unsigned), + Make_Integer_Literal (Loc, 0)), + Decls), + Build_To_Any_Call (Inner_TypeCode, Decls))); + end if; + end loop; + + if Constrained then + Return_Alias_TypeCode (Inner_TypeCode); + else + Add_TypeCode_Parameter (Inner_TypeCode, Parameters); + Start_String; + Store_String_Char ('V'); + Add_String_Parameter (End_String, Parameters); + Return_Constructed_TypeCode (RTE (RE_TC_Struct)); + end if; + end; - begin - if Nkind (Unit_Node) = N_Package_Declaration then - Spec := Specification (Unit_Node); - Decls := Visible_Declarations (Spec); - New_Scope (Scope_Of_Spec (Spec)); - Add_Receiving_Stubs_To_Declarations (Spec, Decls); + else + -- Default: type is represented as an opaque sequence of bytes - else - Spec := - Package_Specification_Of_Scope (Corresponding_Spec (Unit_Node)); - Decls := Declarations (Unit_Node); - New_Scope (Scope_Of_Spec (Unit_Node)); - Temp := New_List; - Add_Receiving_Stubs_To_Declarations (Spec, Temp); - Insert_List_Before (First (Decls), Temp); - end if; + Return_Alias_TypeCode + (New_Occurrence_Of (RTE (RE_TC_Opaque), Loc)); + end if; - Pop_Scope; - end Expand_Receiving_Stubs_Bodies; + Decl := + Make_Subprogram_Body (Loc, + Specification => Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stms)); + end Build_TypeCode_Function; + + --------------------------------- + -- Find_Numeric_Representation -- + --------------------------------- + + function Find_Numeric_Representation + (Typ : Entity_Id) return Entity_Id + is + FST : constant Entity_Id := First_Subtype (Typ); + P_Size : constant Uint := Esize (FST); - ---------------------------- - -- Get_Pkg_Name_string_Id -- - ---------------------------- + begin + if Is_Unsigned_Type (Typ) then + if P_Size <= Standard_Short_Short_Integer_Size then + return RTE (RE_Short_Short_Unsigned); - function Get_Pkg_Name_String_Id (Decl_Node : Node_Id) return String_Id is - Unit_Name_Id : constant Unit_Name_Type := Get_Unit_Name (Decl_Node); + elsif P_Size <= Standard_Short_Integer_Size then + return RTE (RE_Short_Unsigned); - begin - Get_Unit_Name_String (Unit_Name_Id); + elsif P_Size <= Standard_Integer_Size then + return RTE (RE_Unsigned); - -- Remove seven last character (" (spec)" or " (body)"). + elsif P_Size <= Standard_Long_Integer_Size then + return RTE (RE_Long_Unsigned); - Name_Len := Name_Len - 7; - pragma Assert (Name_Buffer (Name_Len + 1) = ' '); + else + return RTE (RE_Long_Long_Unsigned); + end if; - return Get_String_Id (Name_Buffer (1 .. Name_Len)); - end Get_Pkg_Name_String_Id; + elsif Is_Integer_Type (Typ) then + if P_Size <= Standard_Short_Short_Integer_Size then + return Standard_Short_Short_Integer; - ------------------- - -- Get_String_Id -- - ------------------- + elsif P_Size <= Standard_Short_Integer_Size then + return Standard_Short_Integer; - function Get_String_Id (Val : String) return String_Id is - begin - Start_String; - Store_String_Chars (Val); - return End_String; - end Get_String_Id; + elsif P_Size <= Standard_Integer_Size then + return Standard_Integer; - ----------------------- - -- Get_Subprogram_Id -- - ----------------------- + elsif P_Size <= Standard_Long_Integer_Size then + return Standard_Long_Integer; - function Get_Subprogram_Id (E : Entity_Id) return Int is - Current_Declaration : Node_Id; - Result : Int := 0; + else + return Standard_Long_Long_Integer; + end if; - begin - pragma Assert - (Is_Remote_Call_Interface (Scope (E)) - and then - (Nkind (Parent (E)) = N_Procedure_Specification - or else - Nkind (Parent (E)) = N_Function_Specification)); - - Current_Declaration := - First (Visible_Declarations - (Package_Specification_Of_Scope (Scope (E)))); - - while Current_Declaration /= Empty loop - if Nkind (Current_Declaration) = N_Subprogram_Declaration - and then Comes_From_Source (Current_Declaration) - then - if Defining_Unit_Name - (Specification (Current_Declaration)) = E - then - return Result; + elsif Is_Floating_Point_Type (Typ) then + if P_Size <= Standard_Short_Float_Size then + return Standard_Short_Float; + + elsif P_Size <= Standard_Float_Size then + return Standard_Float; + + elsif P_Size <= Standard_Long_Float_Size then + return Standard_Long_Float; + + else + return Standard_Long_Long_Float; + end if; + + else + raise Program_Error; end if; - Result := Result + 1; - end if; + -- TBD: fixed point types??? + -- TBverified numeric types with a biased representation??? - Next (Current_Declaration); - end loop; + end Find_Numeric_Representation; - -- Error if we do not find it + --------------------------- + -- Append_Array_Traversal -- + --------------------------- - raise Program_Error; - end Get_Subprogram_Id; + procedure Append_Array_Traversal + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id := Empty; + Depth : Pos := 1) + is + Loc : constant Source_Ptr := Sloc (Subprogram); + Typ : constant Entity_Id := Etype (Arry); + Constrained : constant Boolean := Is_Constrained (Typ); + Ndim : constant Pos := Number_Dimensions (Typ); - ---------- - -- Hash -- - ---------- + Inner_Any, Inner_Counter : Entity_Id; - function Hash (F : Entity_Id) return Hash_Index is - begin - return Hash_Index (Natural (F) mod Positive (Hash_Index'Last + 1)); - end Hash; + Loop_Stm : Node_Id; + Inner_Stmts : constant List_Id := New_List; - -------------------------- - -- Input_With_Tag_Check -- - -------------------------- + begin + if Depth > Ndim then - function Input_With_Tag_Check - (Loc : Source_Ptr; - Var_Type : Entity_Id; - Stream : Entity_Id) - return Node_Id - is - begin - return - Make_Subprogram_Body (Loc, - Specification => Make_Function_Specification (Loc, - Defining_Unit_Name => - Make_Defining_Identifier (Loc, New_Internal_Name ('S')), - Subtype_Mark => New_Occurrence_Of (Var_Type, Loc)), - Declarations => No_List, - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, New_List ( - Make_Tag_Check (Loc, - Make_Return_Statement (Loc, - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Var_Type, Loc), - Attribute_Name => Name_Input, - Expressions => - New_List (New_Occurrence_Of (Stream, Loc)))))))); - end Input_With_Tag_Check; + -- Processing for one element of an array - -------------------------------- - -- Is_RACW_Controlling_Formal -- - -------------------------------- + declare + Element_Expr : constant Node_Id := + Make_Indexed_Component (Loc, + New_Occurrence_Of (Arry, Loc), + Indices); + begin + Set_Etype (Element_Expr, Component_Type (Typ)); + Add_Process_Element (Stmts, + Any => Any, + Counter => Counter, + Datum => Element_Expr); + end; - function Is_RACW_Controlling_Formal - (Parameter : Node_Id; - Stub_Type : Entity_Id) - return Boolean - is - Typ : Entity_Id; + return; + end if; - begin - -- If the kind of the parameter is E_Void, then it is not a - -- controlling formal (this can happen in the context of RAS). + Append_To (Indices, + Make_Identifier (Loc, New_External_Name ('L', Depth))); - if Ekind (Defining_Identifier (Parameter)) = E_Void then - return False; - end if; + if not Constrained or else Depth > 1 then + Inner_Any := Make_Defining_Identifier (Loc, + New_External_Name ('A', Depth)); + Set_Etype (Inner_Any, RTE (RE_Any)); + else + Inner_Any := Empty; + end if; - -- If the parameter is not a controlling formal, then it cannot - -- be possibly a RACW_Controlling_Formal. + if Present (Counter) then + Inner_Counter := Make_Defining_Identifier (Loc, + New_External_Name ('J', Depth)); + else + Inner_Counter := Empty; + end if; - if not Is_Controlling_Formal (Defining_Identifier (Parameter)) then - return False; - end if; + declare + Loop_Any : Node_Id := Inner_Any; - Typ := Parameter_Type (Parameter); - return (Nkind (Typ) = N_Access_Definition - and then Etype (Subtype_Mark (Typ)) = Stub_Type) - or else Etype (Typ) = Stub_Type; - end Is_RACW_Controlling_Formal; + begin + -- For the first dimension of a constrained array, we add + -- elements directly in the corresponding Any; there is no + -- intervening inner Any. - -------------------- - -- Make_Tag_Check -- - -------------------- + if No (Loop_Any) then + Loop_Any := Any; + end if; - function Make_Tag_Check (Loc : Source_Ptr; N : Node_Id) return Node_Id is - Occ : constant Entity_Id := - Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + Append_Array_Traversal (Inner_Stmts, + Any => Loop_Any, + Counter => Inner_Counter, + Depth => Depth + 1); + end; - begin - return Make_Block_Statement (Loc, - Handled_Statement_Sequence => - Make_Handled_Sequence_Of_Statements (Loc, - Statements => New_List (N), + Loop_Stm := + Make_Implicit_Loop_Statement (Subprogram, + Iteration_Scheme => + Make_Iteration_Scheme (Loc, + Loop_Parameter_Specification => + Make_Loop_Parameter_Specification (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Chars => New_External_Name ('L', Depth)), + + Discrete_Subtype_Definition => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Arry, Loc), + Attribute_Name => Name_Range, + + Expressions => New_List ( + Make_Integer_Literal (Loc, Depth))))), + Statements => Inner_Stmts); - Exception_Handlers => New_List ( - Make_Exception_Handler (Loc, - Choice_Parameter => Occ, + declare + Decls : constant List_Id := New_List; + Dimen_Stmts : constant List_Id := New_List; + Length_Node : Node_Id; - Exception_Choices => - New_List (New_Occurrence_Of (RTE (RE_Tag_Error), Loc)), + Inner_Any_TypeCode : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_External_Name ('T', Depth)); - Statements => - New_List (Make_Procedure_Call_Statement (Loc, - New_Occurrence_Of - (RTE (RE_Raise_Program_Error_Unknown_Tag), Loc), - New_List (New_Occurrence_Of (Occ, Loc)))))))); - end Make_Tag_Check; + Inner_Any_TypeCode_Expr : Node_Id; - ---------------------------- - -- Need_Extra_Constrained -- - ---------------------------- + begin + if Depth = 1 then + if Constrained then + Inner_Any_TypeCode_Expr := + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_Get_TC), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc))); + else + Inner_Any_TypeCode_Expr := + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Any_Member_Type), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Make_Integer_Literal (Loc, Ndim))); + end if; + else + Inner_Any_TypeCode_Expr := + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_Content_Type), Loc), + Parameter_Associations => New_List ( + Make_Identifier (Loc, + Chars => New_External_Name ('T', Depth - 1)))); + end if; - function Need_Extra_Constrained (Parameter : Node_Id) return Boolean is - Etyp : constant Entity_Id := Etype (Parameter_Type (Parameter)); + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Inner_Any_TypeCode, + Constant_Present => True, + Object_Definition => New_Occurrence_Of ( + RTE (RE_TypeCode), Loc), + Expression => Inner_Any_TypeCode_Expr)); + + if Present (Inner_Any) then + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Inner_Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Inner_Any_TypeCode, Loc))))); + end if; - begin - return Out_Present (Parameter) - and then Has_Discriminants (Etyp) - and then not Is_Constrained (Etyp) - and then not Is_Indefinite_Subtype (Etyp); - end Need_Extra_Constrained; + if Present (Inner_Counter) then + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Inner_Counter, + Object_Definition => + New_Occurrence_Of (RTE (RE_Long_Unsigned), Loc), + Expression => + Make_Integer_Literal (Loc, 0))); + end if; - ------------------------------------ - -- Pack_Entity_Into_Stream_Access -- - ------------------------------------ + if not Constrained then + Length_Node := Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Arry, Loc), + Attribute_Name => Name_Length, + Expressions => + New_List (Make_Integer_Literal (Loc, Depth))); + Set_Etype (Length_Node, RTE (RE_Long_Unsigned)); + + Add_Process_Element (Dimen_Stmts, + Datum => Length_Node, + Any => Inner_Any, + Counter => Inner_Counter); + end if; - function Pack_Entity_Into_Stream_Access - (Loc : Source_Ptr; - Stream : Node_Id; - Object : Entity_Id; - Etyp : Entity_Id := Empty) - return Node_Id - is - Typ : Entity_Id; + -- Loop_Stm does appropriate processing for each element + -- of Inner_Any. - begin - if Etyp /= Empty then - Typ := Etyp; - else - Typ := Etype (Object); - end if; + Append_To (Dimen_Stmts, Loop_Stm); - return - Pack_Node_Into_Stream_Access (Loc, - Stream => Stream, - Object => New_Occurrence_Of (Object, Loc), - Etyp => Typ); - end Pack_Entity_Into_Stream_Access; + -- Link outer and inner any - --------------------------- - -- Pack_Node_Into_Stream -- - --------------------------- + if Present (Inner_Any) then + Add_Process_Element (Dimen_Stmts, + Any => Any, + Counter => Counter, + Datum => New_Occurrence_Of (Inner_Any, Loc)); + end if; - function Pack_Node_Into_Stream - (Loc : Source_Ptr; - Stream : Entity_Id; - Object : Node_Id; - Etyp : Entity_Id) - return Node_Id - is - Write_Attribute : Name_Id := Name_Write; + Append_To (Stmts, + Make_Block_Statement (Loc, + Declarations => + Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Dimen_Stmts))); + end; + end Append_Array_Traversal; - begin - if not Is_Constrained (Etyp) then - Write_Attribute := Name_Output; - end if; + ------------------------------- + -- Make_Helper_Function_Name -- + ------------------------------- - return - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Etyp, Loc), - Attribute_Name => Write_Attribute, - Expressions => New_List ( - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Stream, Loc), - Attribute_Name => Name_Access), - Object)); - end Pack_Node_Into_Stream; + function Make_Helper_Function_Name + (Loc : Source_Ptr; + Typ : Entity_Id; + Nam : Name_Id) return Entity_Id + is + begin - ---------------------------------- - -- Pack_Node_Into_Stream_Access -- - ---------------------------------- + declare + Serial : Nat := 0; + -- For tagged types, we use a canonical name so that it matches + -- the primitive spec. For all other cases, we use a serialized + -- name so that multiple generations of the same procedure do + -- not clash. + begin + if not Is_Tagged_Type (Typ) then + Serial := Increment_Serial_Number; + end if; - function Pack_Node_Into_Stream_Access - (Loc : Source_Ptr; - Stream : Node_Id; - Object : Node_Id; - Etyp : Entity_Id) - return Node_Id - is - Write_Attribute : Name_Id := Name_Write; + -- Use prefixed underscore to avoid potential clash with used + -- identifier (we use attribute names for Nam). - begin - if not Is_Constrained (Etyp) then - Write_Attribute := Name_Output; - end if; + return + Make_Defining_Identifier (Loc, + Chars => + New_External_Name + (Related_Id => Nam, + Suffix => ' ', Suffix_Index => Serial, + Prefix => '_')); + end; + end Make_Helper_Function_Name; + end Helpers; - return - Make_Attribute_Reference (Loc, - Prefix => New_Occurrence_Of (Etyp, Loc), - Attribute_Name => Write_Attribute, - Expressions => New_List ( - Stream, - Object)); - end Pack_Node_Into_Stream_Access; + ----------------------------------- + -- Reserve_NamingContext_Methods -- + ----------------------------------- + + procedure Reserve_NamingContext_Methods is + Str_Resolve : constant String := "resolve"; + begin + Name_Buffer (1 .. Str_Resolve'Length) := Str_Resolve; + Name_Len := Str_Resolve'Length; + Overload_Counter_Table.Set (Name_Find, 1); + end Reserve_NamingContext_Methods; + + end PolyORB_Support; ------------------------------- -- RACW_Type_Is_Asynchronous -- ------------------------------- - procedure RACW_Type_Is_Asynchronous (RACW_Type : in Entity_Id) is - N : constant Node_Id := Asynchronous_Flags_Table.Get (RACW_Type); - pragma Assert (N /= Empty); - + procedure RACW_Type_Is_Asynchronous (RACW_Type : Entity_Id) is + Asynchronous_Flag : constant Entity_Id := + Asynchronous_Flags_Table.Get (RACW_Type); begin - Replace (N, New_Occurrence_Of (Standard_True, Sloc (N))); + Replace (Expression (Parent (Asynchronous_Flag)), + New_Occurrence_Of (Standard_True, Sloc (Asynchronous_Flag))); end RACW_Type_Is_Asynchronous; ------------------------- @@ -3791,24 +11063,37 @@ package body Exp_Dist is function RCI_Package_Locator (Loc : Source_Ptr; - Package_Spec : Node_Id) - return Node_Id + Package_Spec : Node_Id) return Node_Id is - Inst : constant Node_Id := - Make_Package_Instantiation (Loc, - Defining_Unit_Name => - Make_Defining_Identifier (Loc, New_Internal_Name ('R')), - Name => - New_Occurrence_Of (RTE (RE_RCI_Info), Loc), - Generic_Associations => New_List ( - Make_Generic_Association (Loc, - Selector_Name => - Make_Identifier (Loc, Name_RCI_Name), - Explicit_Generic_Actual_Parameter => - Make_String_Literal (Loc, - Strval => Get_Pkg_Name_String_Id (Package_Spec))))); + Inst : Node_Id; + Pkg_Name : String_Id; begin + Get_Library_Unit_Name_String (Package_Spec); + Pkg_Name := String_From_Name_Buffer; + Inst := + Make_Package_Instantiation (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, New_Internal_Name ('R')), + Name => + New_Occurrence_Of (RTE (RE_RCI_Locator), Loc), + Generic_Associations => New_List ( + Make_Generic_Association (Loc, + Selector_Name => + Make_Identifier (Loc, Name_RCI_Name), + Explicit_Generic_Actual_Parameter => + Make_String_Literal (Loc, + Strval => Pkg_Name)), + Make_Generic_Association (Loc, + Selector_Name => + Make_Identifier (Loc, Name_Version), + Explicit_Generic_Actual_Parameter => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Defining_Entity (Package_Spec), Loc), + Attribute_Name => + Name_Version)))); + RCI_Locator_Table.Set (Defining_Unit_Name (Package_Spec), Defining_Unit_Name (Inst)); return Inst; @@ -3819,17 +11104,40 @@ package body Exp_Dist is ----------------------------------------------- procedure Remote_Types_Tagged_Full_View_Encountered - (Full_View : in Entity_Id) + (Full_View : Entity_Id) is Stub_Elements : constant Stub_Structure := Stubs_Table.Get (Full_View); begin + -- For an RACW encountered before the freeze point of its designated + -- type, the stub type is generated at the point of the RACW declaration + -- but the primitives are generated only once the designated type is + -- frozen. That freeze can occur in another scope, for example when the + -- RACW is declared in a nested package. In that case we need to + -- reestablish the stub type's scope prior to generating its primitive + -- operations. + if Stub_Elements /= Empty_Stub_Structure then - Add_RACW_Primitive_Declarations_And_Bodies - (Full_View, - Parent (Declaration_Node (Stub_Elements.Object_RPC_Receiver)), - List_Containing (Declaration_Node (Full_View))); + declare + Saved_Scope : constant Entity_Id := Current_Scope; + Stubs_Scope : constant Entity_Id := + Scope (Stub_Elements.Stub_Type); + + begin + if Current_Scope /= Stubs_Scope then + Push_Scope (Stubs_Scope); + end if; + + Add_RACW_Primitive_Declarations_And_Bodies + (Full_View, + Stub_Elements.RPC_Receiver_Decl, + Stub_Elements.Body_Decls); + + if Current_Scope /= Saved_Scope then + Pop_Scope; + end if; + end; end if; end Remote_Types_Tagged_Full_View_Encountered; @@ -3838,9 +11146,10 @@ package body Exp_Dist is ------------------- function Scope_Of_Spec (Spec : Node_Id) return Entity_Id is - Unit_Name : Node_Id := Defining_Unit_Name (Spec); + Unit_Name : Node_Id; begin + Unit_Name := Defining_Unit_Name (Spec); while Nkind (Unit_Name) /= N_Defining_Identifier loop Unit_Name := Defining_Identifier (Unit_Name); end loop; @@ -3848,4 +11157,328 @@ package body Exp_Dist is return Unit_Name; end Scope_Of_Spec; + ---------------------- + -- Set_Renaming_TSS -- + ---------------------- + + procedure Set_Renaming_TSS + (Typ : Entity_Id; + Nam : Entity_Id; + TSS_Nam : TSS_Name_Type) + is + Loc : constant Source_Ptr := Sloc (Nam); + Spec : constant Node_Id := Parent (Nam); + + TSS_Node : constant Node_Id := + Make_Subprogram_Renaming_Declaration (Loc, + Specification => + Copy_Specification (Loc, + Spec => Spec, + New_Name => Make_TSS_Name (Typ, TSS_Nam)), + Name => New_Occurrence_Of (Nam, Loc)); + + Snam : constant Entity_Id := + Defining_Unit_Name (Specification (TSS_Node)); + + begin + if Nkind (Spec) = N_Function_Specification then + Set_Ekind (Snam, E_Function); + Set_Etype (Snam, Entity (Result_Definition (Spec))); + else + Set_Ekind (Snam, E_Procedure); + Set_Etype (Snam, Standard_Void_Type); + end if; + + Set_TSS (Typ, Snam); + end Set_Renaming_TSS; + + ---------------------------------------------- + -- Specific_Add_Obj_RPC_Receiver_Completion -- + ---------------------------------------------- + + procedure Specific_Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Add_Obj_RPC_Receiver_Completion (Loc, + Decls, RPC_Receiver, Stub_Elements); + when others => + GARLIC_Support.Add_Obj_RPC_Receiver_Completion (Loc, + Decls, RPC_Receiver, Stub_Elements); + end case; + end Specific_Add_Obj_RPC_Receiver_Completion; + + -------------------------------- + -- Specific_Add_RACW_Features -- + -------------------------------- + + procedure Specific_Add_RACW_Features + (RACW_Type : Entity_Id; + Desig : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Body_Decls : List_Id) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Add_RACW_Features + (RACW_Type, + Desig, + Stub_Type, + Stub_Type_Access, + RPC_Receiver_Decl, + Body_Decls); + + when others => + GARLIC_Support.Add_RACW_Features + (RACW_Type, + Stub_Type, + Stub_Type_Access, + RPC_Receiver_Decl, + Body_Decls); + end case; + end Specific_Add_RACW_Features; + + -------------------------------- + -- Specific_Add_RAST_Features -- + -------------------------------- + + procedure Specific_Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Add_RAST_Features (Vis_Decl, RAS_Type); + when others => + GARLIC_Support.Add_RAST_Features (Vis_Decl, RAS_Type); + end case; + end Specific_Add_RAST_Features; + + -------------------------------------------------- + -- Specific_Add_Receiving_Stubs_To_Declarations -- + -------------------------------------------------- + + procedure Specific_Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id; + Stmts : List_Id) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Add_Receiving_Stubs_To_Declarations + (Pkg_Spec, Decls, Stmts); + when others => + GARLIC_Support.Add_Receiving_Stubs_To_Declarations + (Pkg_Spec, Decls, Stmts); + end case; + end Specific_Add_Receiving_Stubs_To_Declarations; + + ------------------------------------------ + -- Specific_Build_General_Calling_Stubs -- + ------------------------------------------ + + procedure Specific_Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target : RPC_Target; + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Build_General_Calling_Stubs + (Decls, + Statements, + Target.Object, + Subprogram_Id, + Asynchronous, + Is_Known_Asynchronous, + Is_Known_Non_Asynchronous, + Is_Function, + Spec, + Stub_Type, + RACW_Type, + Nod); + + when others => + GARLIC_Support.Build_General_Calling_Stubs + (Decls, + Statements, + Target.Partition, + Target.RPC_Receiver, + Subprogram_Id, + Asynchronous, + Is_Known_Asynchronous, + Is_Known_Non_Asynchronous, + Is_Function, + Spec, + Stub_Type, + RACW_Type, + Nod); + end case; + end Specific_Build_General_Calling_Stubs; + + -------------------------------------- + -- Specific_Build_RPC_Receiver_Body -- + -------------------------------------- + + procedure Specific_Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Build_RPC_Receiver_Body + (RPC_Receiver, + Request, + Subp_Id, + Subp_Index, + Stmts, + Decl); + + when others => + GARLIC_Support.Build_RPC_Receiver_Body + (RPC_Receiver, + Request, + Subp_Id, + Subp_Index, + Stmts, + Decl); + end case; + end Specific_Build_RPC_Receiver_Body; + + -------------------------------- + -- Specific_Build_Stub_Target -- + -------------------------------- + + function Specific_Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + return PolyORB_Support.Build_Stub_Target (Loc, + Decls, RCI_Locator, Controlling_Parameter); + + when others => + return GARLIC_Support.Build_Stub_Target (Loc, + Decls, RCI_Locator, Controlling_Parameter); + end case; + end Specific_Build_Stub_Target; + + ------------------------------ + -- Specific_Build_Stub_Type -- + ------------------------------ + + procedure Specific_Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Build_Stub_Type ( + RACW_Type, Stub_Type, + Stub_Type_Decl, RPC_Receiver_Decl); + + when others => + GARLIC_Support.Build_Stub_Type ( + RACW_Type, Stub_Type, + Stub_Type_Decl, RPC_Receiver_Decl); + end case; + end Specific_Build_Stub_Type; + + function Specific_Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + return PolyORB_Support.Build_Subprogram_Receiving_Stubs + (Vis_Decl, + Asynchronous, + Dynamically_Asynchronous, + Stub_Type, + RACW_Type, + Parent_Primitive); + + when others => + return GARLIC_Support.Build_Subprogram_Receiving_Stubs + (Vis_Decl, + Asynchronous, + Dynamically_Asynchronous, + Stub_Type, + RACW_Type, + Parent_Primitive); + end case; + end Specific_Build_Subprogram_Receiving_Stubs; + + ------------------------------- + -- Transmit_As_Unconstrained -- + ------------------------------- + + function Transmit_As_Unconstrained (Typ : Entity_Id) return Boolean is + begin + return + not (Is_Elementary_Type (Typ) or else Is_Constrained (Typ)) + or else (Is_Access_Type (Typ) and then Can_Never_Be_Null (Typ)); + end Transmit_As_Unconstrained; + + -------------------------- + -- Underlying_RACW_Type -- + -------------------------- + + function Underlying_RACW_Type (RAS_Typ : Entity_Id) return Entity_Id is + Record_Type : Entity_Id; + + begin + if Ekind (RAS_Typ) = E_Record_Type then + Record_Type := RAS_Typ; + else + pragma Assert (Present (Equivalent_Type (RAS_Typ))); + Record_Type := Equivalent_Type (RAS_Typ); + end if; + + return + Etype (Subtype_Indication + (Component_Definition + (First (Component_Items + (Component_List + (Type_Definition + (Declaration_Node (Record_Type)))))))); + end Underlying_RACW_Type; + end Exp_Dist;