gcc/ada/s-pooglo.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                   S Y S T E M . P O O L _ G L O B A L                    --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2007, 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,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, 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 --  Storage pool corresponding to default global storage pool used for
  35 --  types for which no storage pool is specified.
  36
  37 with System;
  38 with System.Storage_Pools;
  39 with System.Storage_Elements;
  40
  41 package System.Pool_Global is
  42    pragma Elaborate_Body;
  43    --  Needed to ensure that library routines can execute allocators
  44
  45    --  Allocation strategy:
  46
  47    --    Call to malloc/free for each Allocate/Deallocate
  48    --    no user specifiable size
  49    --    no automatic reclaim
  50    --    minimal overhead
  51
  52    --  Pool simulating the allocation/deallocation strategy used by the
  53    --  compiler for access types globally declared.
  54
  55    type Unbounded_No_Reclaim_Pool is new
  56      System.Storage_Pools.Root_Storage_Pool with null record;
  57
  58    function Storage_Size
  59      (Pool : Unbounded_No_Reclaim_Pool)
  60       return System.Storage_Elements.Storage_Count;
  61
  62    procedure Allocate
  63      (Pool         : in out Unbounded_No_Reclaim_Pool;
  64       Address      : out System.Address;
  65       Storage_Size : System.Storage_Elements.Storage_Count;
  66       Alignment    : System.Storage_Elements.Storage_Count);
  67
  68    procedure Deallocate
  69      (Pool         : in out Unbounded_No_Reclaim_Pool;
  70       Address      : System.Address;
  71       Storage_Size : System.Storage_Elements.Storage_Count;
  72       Alignment    : System.Storage_Elements.Storage_Count);
  73
  74    --  Pool object used by the compiler when implicit Storage Pool objects are
  75    --  explicitly referred to. For instance when writing something like:
  76    --     for T'Storage_Pool use Q'Storage_Pool;
  77    --  and Q'Storage_Pool hasn't been defined explicitly.
  78
  79    Global_Pool_Object : Unbounded_No_Reclaim_Pool;
  80
  81 end System.Pool_Global;