------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                     S Y S T E M . P O O L _ S I Z E                      --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--                            $Revision: 1.4 $                              --
--                                                                          --
--           Copyright (c) 1992,1993,1994 NYU, All Rights Reserved          --
--                                                                          --
-- The GNAT library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU Library General Public License as published by --
-- the Free Software  Foundation; either version 2, or (at your option) any --
-- later version.  The GNAT library is distributed in the hope that it will --
-- be useful, but WITHOUT ANY WARRANTY;  without even  the implied warranty --
-- of MERCHANTABILITY  or  FITNESS FOR  A PARTICULAR PURPOSE.  See the  GNU --
-- Library  General  Public  License for  more  details.  You  should  have --
-- received  a copy of the GNU  Library  General Public License  along with --
-- the GNAT library;  see the file  COPYING.LIB.  If not, write to the Free --
-- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.        --
--                                                                          --
------------------------------------------------------------------------------

with System.Storage_Pools;
with System.Storage_Elements;

package System.Pool_Size is

pragma Elaborate_Body;
--  Needed to ensure that library routines can execute allocators

   ------------------------
   -- Stack_Bounded_Pool --
   ------------------------

   --  Allocation strategy:

   --    Pool is a regular stack array, no use of malloc
   --    user specified size
   --    Space of pool is globally reclaimed by normal stack management

   --  Used in the compiler for access types with 'STORAGE_SIZE rep. clause
   --  Only used for allocating objects of the same type.

   type Stack_Bounded_Pool
     (Pool_Size : System.Storage_Elements.Storage_Count;
      Elmt_Size : System.Storage_Elements.Storage_Count;
      Alignment : System.Storage_Elements.Storage_Count)
   is
      new System.Storage_Pools.Root_Storage_Pool with record
         First_Free        : System.Storage_Elements.Storage_Count;
         First_Empty       : System.Storage_Elements.Storage_Count;
         Aligned_Elmt_Size : System.Storage_Elements.Storage_Count;
         The_Pool          : System.Storage_Elements.Storage_Array
                                                       (1 .. Pool_Size);
      end record;

   function Storage_Size
     (Pool : Stack_Bounded_Pool)
      return System.Storage_Elements.Storage_Count;

   procedure Allocate
     (Pool         : in out Stack_Bounded_Pool;
      Address      : out System.Address;
      Storage_Size : System.Storage_Elements.Storage_Count;
      Alignment    : System.Storage_Elements.Storage_Count);

   procedure Deallocate
     (Pool         : in out Stack_Bounded_Pool;
      Address      : System.Address;
      Storage_Size : System.Storage_Elements.Storage_Count;
      Alignment    : System.Storage_Elements.Storage_Count);

   procedure Initialize (Pool : in out Stack_Bounded_Pool);

end System.Pool_Size;
