| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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) 1992-2005 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; |
