gcc/ada/s-atacco.adb

   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 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2001 Free Software Foundation, Inc.          --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with Unchecked_Conversion;
  35 package body System.Address_To_Access_Conversions is
  36
  37    ----------------
  38    -- To_Address --
  39    ----------------
  40
  41    function To_Address (Value : Object_Pointer) return Address is
  42    begin
  43       if Value = null then
  44          return Null_Address;
  45       else
  46          return Value.all'Address;
  47       end if;
  48    end To_Address;
  49
  50    ----------------
  51    -- To_Pointer --
  52    ----------------
  53
  54    function To_Pointer (Value : Address) return Object_Pointer is
  55       function A_To_P is new Unchecked_Conversion (Address, Object_Pointer);
  56
  57    begin
  58       return A_To_P (Value);
  59    end To_Pointer;
  60
  61 end System.Address_To_Access_Conversions;