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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . A D D R E S S _ T O _ A C C E S S _ C O N V E R S I O N S --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2006, 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 contents of the part following the private keyword. --
-- --
-- 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- --
-- 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, 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, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
generic
type Object (<>) is limited private;
package System.Address_To_Access_Conversions is
pragma Preelaborate;
pragma Elaborate_Body;
-- This pragma Elaborate_Body is there to ensure the requirement of what is
-- at the moment a dummy null body. The reason this null body is there is
-- that we used to have a real body, and it causes bootstrap problems with
-- old compilers if we try to remove the corresponding file.
pragma Compile_Time_Warning
(Object'Unconstrained_Array,
"Object is unconstrained array type" & ASCII.LF &
"To_Pointer results may not have bounds");
-- Capture constrained status, suppressing warnings, since this is
-- an obsolescent feature to use Constrained in this way (RM J.4).
pragma Warnings (Off);
Xyz : Boolean := Object'Constrained;
pragma Warnings (On);
type Object_Pointer is access all Object;
for Object_Pointer'Size use Standard'Address_Size;
pragma No_Strict_Aliasing (Object_Pointer);
-- Strictly speaking, this routine should not be used to generate pointers
-- to other than proper values of the proper type, but in practice, this
-- is done all the time. This pragma stops the compiler from doing some
-- optimizations that may cause unexpected results based on the assumption
-- of no strict aliasing.
function To_Pointer (Value : Address) return Object_Pointer;
function To_Address (Value : Object_Pointer) return Address;
pragma Import (Intrinsic, To_Pointer);
pragma Import (Intrinsic, To_Address);
end System.Address_To_Access_Conversions;
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