1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- 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 -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2018, Free Software Foundation, Inc. -- 10-- -- 11-- This specification is derived from the Ada Reference Manual for use with -- 12-- GNAT. The copyright notice above, and the license provisions that follow -- 13-- apply solely to the contents of the part following the private keyword. -- 14-- -- 15-- GNAT is free software; you can redistribute it and/or modify it under -- 16-- terms of the GNU General Public License as published by the Free Soft- -- 17-- ware Foundation; either version 3, or (at your option) any later ver- -- 18-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 19-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 20-- or FITNESS FOR A PARTICULAR PURPOSE. -- 21-- -- 22-- As a special exception under Section 7 of GPL version 3, you are granted -- 23-- additional permissions described in the GCC Runtime Library Exception, -- 24-- version 3.1, as published by the Free Software Foundation. -- 25-- -- 26-- You should have received a copy of the GNU General Public License and -- 27-- a copy of the GCC Runtime Library Exception along with this program; -- 28-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 29-- <http://www.gnu.org/licenses/>. -- 30-- -- 31-- GNAT was originally developed by the GNAT team at New York University. -- 32-- Extensive contributions were provided by Ada Core Technologies Inc. -- 33-- -- 34------------------------------------------------------------------------------ 35 36generic 37 type Object (<>) is limited private; 38 39package System.Address_To_Access_Conversions is 40 pragma Preelaborate; 41 42 pragma Compile_Time_Warning 43 (Object'Unconstrained_Array, 44 "Object is unconstrained array type" & ASCII.LF & 45 "To_Pointer results may not have bounds"); 46 47 type Object_Pointer is access all Object; 48 for Object_Pointer'Size use Standard'Address_Size; 49 50 pragma No_Strict_Aliasing (Object_Pointer); 51 -- Strictly speaking, this routine should not be used to generate pointers 52 -- to other than proper values of the proper type, but in practice, this 53 -- is done all the time. This pragma stops the compiler from doing some 54 -- optimizations that may cause unexpected results based on the assumption 55 -- of no strict aliasing. 56 57 function To_Pointer (Value : Address) return Object_Pointer; 58 function To_Address (Value : Object_Pointer) return Address; 59 60 pragma Import (Intrinsic, To_Pointer); 61 pragma Import (Intrinsic, To_Address); 62 63end System.Address_To_Access_Conversions; 64