64 lines
3.6 KiB
Ada
64 lines
3.6 KiB
Ada
|
------------------------------------------------------------------------------
|
||
|
|
-- --
|
||
|
|
-- 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) 1992-2012, 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 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. --
|
||
|
|
-- --
|
||
|
|
------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
generic
|
||
|
|
type Object (<>) is limited private;
|
||
|
|
|
||
|
|
package System.Address_To_Access_Conversions is
|
||
|
|
pragma Preelaborate;
|
||
|
|
|
||
|
|
pragma Compile_Time_Warning
|
||
|
|
(Object'Unconstrained_Array,
|
||
|
|
"Object is unconstrained array type" & ASCII.LF &
|
||
|
|
"To_Pointer results may not have bounds");
|
||
|
|
|
||
|
|
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;
|