gcc/ada/s-memory.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                         S Y S T E M . M E M O R Y                        --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.1 $
  10 --                                                                          --
  11 --             Copyright (C) 2001 Free Software Foundation, Inc.            --
  12 --                                                                          --
  13 -- This specification is derived from the Ada Reference Manual for use with --
  14 -- GNAT. The copyright notice above, and the license provisions that follow --
  15 -- apply solely to the  contents of the part following the private keyword. --
  16 --                                                                          --
  17 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  18 -- terms of the  GNU General Public License as published  by the Free Soft- --
  19 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  20 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  21 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  22 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  23 -- for  more details.  You should have  received  a copy of the GNU General --
  24 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  25 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  26 -- MA 02111-1307, USA.                                                      --
  27 --                                                                          --
  28 -- As a special exception,  if other files  instantiate  generics from this --
  29 -- unit, or you link  this unit with other files  to produce an executable, --
  30 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  31 -- covered  by the  GNU  General  Public  License.  This exception does not --
  32 -- however invalidate  any other reasons why  the executable file  might be --
  33 -- covered by the  GNU Public License.                                      --
  34 --                                                                          --
  35 -- GNAT was originally developed  by the GNAT team at  New York University. --
  36 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  37 --                                                                          --
  38 ------------------------------------------------------------------------------
  39
  40 --  This package provides the low level memory allocation/deallocation
  41 --  mechanisms used by GNAT.
  42
  43 --  To provide an alternate implementation, simply recompile the modified
  44 --  body of this package with gnatmake -u -a -g s-memory.adb and make sure
  45 --  that the ali and object files for this unit are found in the object
  46 --  search path.
  47
  48 package System.Memory is
  49    pragma Elaborate_Body;
  50
  51    type size_t is mod 2 ** Standard'Address_Size;
  52
  53    function Alloc (Size : size_t) return System.Address;
  54    --  malloc for use by GNAT, with error checking and task lockout,
  55    --  as well as allocation tracking.
  56
  57    procedure Free (Ptr : System.Address);
  58    --  free for use by GNAT, with task lockout and allocation tracking.
  59
  60    function Realloc
  61      (Ptr  : System.Address;
  62       Size : size_t)
  63       return System.Address;
  64    --  realloc for use by GNAT, with error checking and task lockout.
  65
  66 private
  67
  68    pragma Export (C, Alloc, "__gnat_malloc");
  69    pragma Export (C, Free, "__gnat_free");
  70    pragma Export (C, Realloc, "__gnat_realloc");
  71
  72 end System.Memory;