-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2004 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2006, 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- --
-- 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. --
+-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
generic
package System.Rident is
+ pragma Preelaborate;
-- The following enumeration type defines the set of restriction
-- identifiers that are implemented in GNAT.
-- The following cases are checked for consistency in the binder
- (Boolean_Entry_Barriers, -- GNAT (Ravenscar)
+ (Simple_Barriers, -- GNAT (Ravenscar)
No_Abort_Statements, -- (RM D.7(5), H.4(3))
No_Access_Subprograms, -- (RM H.4(17))
No_Allocators, -- (RM H.4(7))
No_Delay, -- (RM H.4(21))
No_Direct_Boolean_Operators, -- GNAT
No_Dispatch, -- (RM H.4(19))
- No_Dynamic_Interrupts, -- GNAT
+ No_Dispatching_Calls, -- GNAT
+ No_Dynamic_Attachment, -- GNAT
No_Dynamic_Priorities, -- (RM D.9(9))
No_Enumeration_Maps, -- GNAT
No_Entry_Calls_In_Elaboration_Code, -- GNAT
No_Entry_Queue, -- GNAT (Ravenscar)
No_Exception_Handlers, -- GNAT
+ No_Exception_Propagation, -- GNAT
No_Exception_Registration, -- GNAT
No_Exceptions, -- (RM H.4(12))
No_Finalization, -- GNAT
No_Unchecked_Access, -- (RM H.4(18))
No_Unchecked_Conversion, -- (RM H.4(16))
No_Unchecked_Deallocation, -- (RM H.4(9))
- No_Wide_Characters, -- GNAT
Static_Priorities, -- GNAT
Static_Storage_Size, -- GNAT
-- The following cases do not require partition-wide checks
Immediate_Reclamation, -- (RM H.4(10))
- No_Implementation_Attributes, -- GNAT
- No_Implementation_Pragmas, -- GNAT
+ No_Implementation_Attributes, -- Ada 2005 AI-257
+ No_Implementation_Pragmas, -- Ada 2005 AI-257
No_Implementation_Restrictions, -- GNAT
No_Elaboration_Code, -- GNAT
+ No_Obsolescent_Features, -- Ada 2005 AI-368
+ No_Wide_Characters, -- GNAT
-- The following cases require a parameter value
-- between different non-zero values.
Max_Asynchronous_Select_Nesting, -- (RM D.7(18), H.4(3))
- Max_Entry_Queue_Depth, -- GNAT
+ Max_Entry_Queue_Length, -- GNAT
-- The remaining entries are not checked at compile/bind time
Not_A_Restriction_Id);
- -- Synonyms permitted for historical purposes of compatibility
+ -- Synonyms permitted for historical purposes of compatibility.
+ -- Must be coordinated with Restrict.Process_Restriction_Synonym.
- -- No_Requeue synonym for No_Requeue_Statements
- -- No_Tasking synonym for Max_Tasks => 0
- -- No_Task_Attributes synonym for No_Task_Attributes_Package
+ Boolean_Entry_Barriers : Restriction_Id renames Simple_Barriers;
+ Max_Entry_Queue_Depth : Restriction_Id renames Max_Entry_Queue_Length;
+ No_Dynamic_Interrupts : Restriction_Id renames No_Dynamic_Attachment;
+ No_Requeue : Restriction_Id renames No_Requeue_Statements;
+ No_Task_Attributes : Restriction_Id renames No_Task_Attributes_Package;
subtype All_Restrictions is Restriction_Id range
- Boolean_Entry_Barriers .. Max_Storage_At_Blocking;
+ Simple_Barriers .. Max_Storage_At_Blocking;
-- All restrictions (excluding only Not_A_Restriction_Id)
subtype All_Boolean_Restrictions is Restriction_Id range
- Boolean_Entry_Barriers .. No_Elaboration_Code;
+ Simple_Barriers .. No_Wide_Characters;
-- All restrictions which do not take a parameter
subtype Partition_Boolean_Restrictions is All_Boolean_Restrictions range
- Boolean_Entry_Barriers .. Static_Storage_Size;
+ Simple_Barriers .. Static_Storage_Size;
-- Boolean restrictions that are checked for partition consistency.
-- Note that all parameter restrictions are checked for partition
-- consistency by default, so this distinction is only needed in the
-- case of Boolean restrictions.
subtype Cunit_Boolean_Restrictions is All_Boolean_Restrictions range
- Immediate_Reclamation .. No_Elaboration_Code;
+ Immediate_Reclamation .. No_Wide_Characters;
-- Boolean restrictions that are not checked for partition consistency
-- and that thus apply only to the current unit. Note that for these
-- restrictions, the compiler does not apply restrictions found in
subtype Checked_Parameter_Restrictions is
All_Parameter_Restrictions range
- Max_Protected_Entries .. Max_Entry_Queue_Depth;
+ Max_Protected_Entries .. Max_Entry_Queue_Length;
-- These are the parameter restrictions that can be at least partially
-- checked at compile/binder time. Minimally, the compiler can detect
-- violations of a restriction pragma with a value of zero reliably.
subtype Checked_Zero_Parameter_Restrictions is
Checked_Parameter_Restrictions range
- Max_Asynchronous_Select_Nesting .. Max_Entry_Queue_Depth;
+ Max_Asynchronous_Select_Nesting .. Max_Entry_Queue_Length;
-- Restrictions with parameters where the compiler can detect the use of
-- the feature, and hence violations of a restriction specifying a value
-- of zero, but cannot detect specific values other than zero/nonzero.
type Parameter_Flags is array (All_Parameter_Restrictions) of Boolean;
type Restrictions_Info is record
- Set : Restriction_Flags := (others => False);
+ Set : Restriction_Flags;
-- An entry is True in the Set array if a restrictions pragma has
-- been encountered for the given restriction. If the value is
-- True for a parameter restriction, then the corresponding entry
-- specified by any such restrictions pragma. Note that a restrictions
-- pragma specifying a value greater than Int'Last is simply ignored.
- Violated : Restriction_Flags := (others => False);
+ Violated : Restriction_Flags;
-- An entry is True in the violations array if the compiler has
-- detected a violation of the restriction. For a parameter
-- restriction, the Count and Unknown arrays have additional
-- information.
- Count : Restriction_Values := (others => 0);
+ Count : Restriction_Values;
-- If an entry for a parameter restriction is True in Violated,
-- the corresponding entry in the Count array may record additional
-- information. If the actual minimum count is known (by taking
-- maximums, or sums, depending on the restriction), it will be
-- recorded in this array. If not, then the value will remain zero.
- Unknown : Parameter_Flags := (others => False);
+ Unknown : Parameter_Flags;
-- If an entry for a parameter restriction is True in Violated,
-- the corresponding entry in the Unknown array may record additional
-- information. If the actual count is not known by the compiler (but
-- that the actual violation count is at least 3 but might be higher.
end record;
+ No_Restrictions : constant Restrictions_Info :=
+ (Set => (others => False),
+ Value => (others => 0),
+ Violated => (others => False),
+ Count => (others => 0),
+ Unknown => (others => False));
+ -- Used to initialize Restrictions_Info variables
+
+ ----------------------------------
+ -- Profile Definitions and Data --
+ ----------------------------------
+
+ type Profile_Name is (Ravenscar, Restricted);
+ -- Names of recognized pfofiles
+
+ type Profile_Data is record
+ Set : Restriction_Flags;
+ -- Set to True if given restriction must be set for the profile,
+ -- and False if it need not be set (False does not mean that it
+ -- must not be set, just that it need not be set). If the flag
+ -- is True for a parameter restriction, then the Value array
+ -- gives the maximum value permitted by the profile.
+
+ Value : Restriction_Values;
+ -- An entry in this array is meaningful only if the corresponding
+ -- flag in Set is True. In that case, the value in this array is
+ -- the maximum value of the parameter permitted by the profile.
+ end record;
+
+ Profile_Info : array (Profile_Name) of Profile_Data :=
+
+ -- Restricted Profile
+
+ (Restricted =>
+
+ -- Restrictions for Restricted profile
+
+ (Set =>
+ (No_Abort_Statements => True,
+ No_Asynchronous_Control => True,
+ No_Dynamic_Attachment => True,
+ No_Dynamic_Priorities => True,
+ No_Entry_Queue => True,
+ No_Local_Protected_Objects => True,
+ No_Protected_Type_Allocators => True,
+ No_Requeue_Statements => True,
+ No_Task_Allocators => True,
+ No_Task_Attributes_Package => True,
+ No_Task_Hierarchy => True,
+ No_Terminate_Alternatives => True,
+ Max_Asynchronous_Select_Nesting => True,
+ Max_Protected_Entries => True,
+ Max_Select_Alternatives => True,
+ Max_Task_Entries => True,
+ others => False),
+
+ -- Value settings for Restricted profile
+
+ Value =>
+ (Max_Asynchronous_Select_Nesting => 0,
+ Max_Protected_Entries => 1,
+ Max_Select_Alternatives => 0,
+ Max_Task_Entries => 0,
+ others => 0)),
+
+ -- Ravenscar Profile
+
+ -- Note: the table entries here only represent the
+ -- required restriction profile for Ravenscar. The
+ -- full Ravenscar profile also requires:
+
+ -- pragma Dispatching_Policy (FIFO_Within_Priorities);
+ -- pragma Locking_Policy (Ceiling_Locking);
+ -- pragma Detect_Blocking
+
+ Ravenscar =>
+
+ -- Restrictions for Ravenscar = Restricted profile ..
+
+ (Set =>
+ (No_Abort_Statements => True,
+ No_Asynchronous_Control => True,
+ No_Dynamic_Attachment => True,
+ No_Dynamic_Priorities => True,
+ No_Entry_Queue => True,
+ No_Local_Protected_Objects => True,
+ No_Protected_Type_Allocators => True,
+ No_Requeue_Statements => True,
+ No_Task_Allocators => True,
+ No_Task_Attributes_Package => True,
+ No_Task_Hierarchy => True,
+ No_Terminate_Alternatives => True,
+ Max_Asynchronous_Select_Nesting => True,
+ Max_Protected_Entries => True,
+ Max_Select_Alternatives => True,
+ Max_Task_Entries => True,
+
+ -- plus these additional restrictions:
+
+ No_Calendar => True,
+ No_Implicit_Heap_Allocations => True,
+ No_Relative_Delay => True,
+ No_Select_Statements => True,
+ No_Task_Termination => True,
+ Simple_Barriers => True,
+ others => False),
+
+ -- Value settings for Ravenscar (same as Restricted)
+
+ Value =>
+ (Max_Asynchronous_Select_Nesting => 0,
+ Max_Protected_Entries => 1,
+ Max_Select_Alternatives => 0,
+ Max_Task_Entries => 0,
+ others => 0)));
+
end System.Rident;
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