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