Ada. Time-tested, safe and secure.

This language feature is available from Ada 95 on. System.Address_To_Access_Conversions is a unit of the Predefined Language Environment since Ada 95.

Specification

--                     Standard Ada library specification
--   Copyright (c) 2003-2018 Maxim Reznik <reznikmm@gmail.com>
--   Copyright (c) 2004-2016 AXE Consultants
--   Copyright (c) 2004, 2005, 2006 Ada-Europe
--   Copyright (c) 2000 The MITRE Corporation, Inc.
--   Copyright (c) 1992, 1993, 1994, 1995 Intermetrics, Inc.
--   SPDX-License-Identifier: BSD-3-Clause and LicenseRef-AdaReferenceManual
-- -------------------------------------------------------------------------

generic
   type Object (<>) is limited private;
package System.Address_To_Access_Conversions is
   pragma Preelaborate (Address_To_Access_Conversions);

   type Object_Pointer is access all Object;
   function To_Pointer (Value : Address) return Object_Pointer;
   function To_Address (Value : Object_Pointer) return Address;

   pragma Convention (Intrinsic, To_Pointer);
   pragma Convention (Intrinsic, To_Address);
end System.Address_To_Access_Conversions;

See also