-- --
-- 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
-- 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
-- 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
-- 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,
(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,
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,
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,
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;
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
-- 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_<routine> wrapper is created,
+ -- which calls the corresponding <routine> in package
+ -- <pcs_implementation>_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_<subprogram> 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_<subprogram> 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,
---------------------------------------
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);
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
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;
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;
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.
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
-- 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, <RAS_Parameters>)
+ -- [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 <func-call>
- -----------------------------------
- -- 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 <actual subtype of Constant_Object>;
- 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 [:= <expr>];
- 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;
-------------------------
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;
-----------------------------------------------
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;
-------------------
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;
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;
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