-- --
-- S p e c --
-- --
--- This specification is adapted from the Ada Reference Manual for use with --
--- GNAT. In accordance with the copyright of that document, you can freely --
--- copy and modify this specification, provided that if you redistribute a --
--- modified version, any changes that you have made are clearly indicated. --
+-- Copyright (C) 2002-2009, Free Software Foundation, Inc. --
+-- --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the implementation dependent sections of this file. --
+-- --
+-- 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 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. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- extra declarations that can be introduced into System using Extend_System.
-- It is a good idea to avoid use clauses for this package!
-pragma Warnings (Off);
--- This is to stop bootstrap problems with the use of Inline_Always
--- To be removed (along with redundant Inline pragmas) in 3.13.
+pragma Compiler_Unit;
package System.Storage_Elements is
-pragma Pure (Storage_Elements);
--- Note that we take advantage of the implementation permission to make
--- this unit Pure instead of Preelaborable; see RM 13.7.1(15).
+ pragma Pure;
+ -- Note that we take advantage of the implementation permission to make
+ -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada 2005,
+ -- this is Pure in any case (AI-362).
+
+ -- We also add the pragma Pure_Function to the operations in this package,
+ -- because otherwise functions with parameters derived from Address are
+ -- treated as non-pure by the back-end (see exp_ch6.adb). This is because
+ -- in many cases such a parameter is used to hide read/out access to
+ -- objects, and it would be unsafe to treat such functions as pure.
type Storage_Offset is range
- -(2 ** (Standard."-" (Standard'Address_Size, 1))) ..
- +(2 ** (Standard."-" (Standard'Address_Size, 1))) - 1;
- -- Note: the reason for the qualification of "-" here by Standard is
- -- that we have a current bug in GNAT that otherwise causes a bogus
- -- ambiguity when this unit is analyzed in an Rtsfind context.
+ -(2 ** (Integer'(Standard'Address_Size) - 1)) ..
+ +(2 ** (Integer'(Standard'Address_Size) - 1)) - Long_Long_Integer'(1);
+ -- Note: the reason for the Long_Long_Integer qualification here is to
+ -- avoid a bogus ambiguity when this unit is analyzed in an rtsfind
+ -- context. It may be possible to remove this in the future, but it is
+ -- certainly harmless in any case ???
subtype Storage_Count is Storage_Offset range 0 .. Storage_Offset'Last;
type Storage_Element is mod 2 ** Storage_Unit;
for Storage_Element'Size use Storage_Unit;
+ pragma Universal_Aliasing (Storage_Element);
+ -- This type is used by the expander to implement aggregate copy
+
type Storage_Array is
array (Storage_Offset range <>) of aliased Storage_Element;
for Storage_Array'Component_Size use Storage_Unit;
function "+" (Left : Address; Right : Storage_Offset) return Address;
pragma Convention (Intrinsic, "+");
- pragma Inline ("+");
pragma Inline_Always ("+");
+ pragma Pure_Function ("+");
function "+" (Left : Storage_Offset; Right : Address) return Address;
pragma Convention (Intrinsic, "+");
- pragma Inline ("+");
pragma Inline_Always ("+");
+ pragma Pure_Function ("+");
function "-" (Left : Address; Right : Storage_Offset) return Address;
pragma Convention (Intrinsic, "-");
- pragma Inline ("-");
pragma Inline_Always ("-");
+ pragma Pure_Function ("-");
function "-" (Left, Right : Address) return Storage_Offset;
pragma Convention (Intrinsic, "-");
- pragma Inline ("-");
pragma Inline_Always ("-");
+ pragma Pure_Function ("-");
function "mod"
(Left : Address;
- Right : Storage_Offset)
- return Storage_Offset;
+ Right : Storage_Offset) return Storage_Offset;
pragma Convention (Intrinsic, "mod");
- pragma Inline ("mod");
pragma Inline_Always ("mod");
+ pragma Pure_Function ("mod");
-- Conversion to/from integers
function To_Address (Value : Integer_Address) return Address;
pragma Convention (Intrinsic, To_Address);
- pragma Inline (To_Address);
pragma Inline_Always (To_Address);
+ pragma Pure_Function (To_Address);
function To_Integer (Value : Address) return Integer_Address;
pragma Convention (Intrinsic, To_Integer);
- pragma Inline (To_Integer);
pragma Inline_Always (To_Integer);
+ pragma Pure_Function (To_Integer);
end System.Storage_Elements;
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