------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                 S Y S T E M . S T O R A G E _ P O O L S                  --
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--          Copyright (C) 1992-2002 Free Software Foundation, Inc.          --
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-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
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------------------------------------------------------------------------------

with Ada.Finalization;
with System.Storage_Elements;

package System.Storage_Pools is
   pragma Preelaborate (System.Storage_Pools);

   type Root_Storage_Pool is abstract
     new Ada.Finalization.Limited_Controlled with private;

   procedure Allocate
     (Pool                     : in out Root_Storage_Pool;
      Storage_Address          : out Address;
      Size_In_Storage_Elements : in System.Storage_Elements.Storage_Count;
      Alignment                : in System.Storage_Elements.Storage_Count)
   is abstract;

   procedure Deallocate
     (Pool                     : in out Root_Storage_Pool;
      Storage_Address          : in Address;
      Size_In_Storage_Elements : in System.Storage_Elements.Storage_Count;
      Alignment                : in System.Storage_Elements.Storage_Count)
   is abstract;

   function Storage_Size
     (Pool : Root_Storage_Pool)
      return System.Storage_Elements.Storage_Count
   is abstract;

private
   --  The following two procedures support the use of class-wide pool
   --  objects in storage pools. When a local type is given a class-wide
   --  storage pool, allocation and deallocation for the type must dispatch
   --  to the operation of the specific pool, which is achieved by a call
   --  to these procedures. (When the pool type is specific, the back-end
   --  generates a call to the statically identified operation of the type).

   procedure Allocate_Any
    (Pool                     : in out Root_Storage_Pool'Class;
     Storage_Address          : out Address;
     Size_In_Storage_Elements : System.Storage_Elements.Storage_Count;
     Alignment                : System.Storage_Elements.Storage_Count);

   procedure Deallocate_Any
    (Pool                     : in out Root_Storage_Pool'Class;
     Storage_Address          : Address;
     Size_In_Storage_Elements : System.Storage_Elements.Storage_Count;
     Alignment                : System.Storage_Elements.Storage_Count);

   type Root_Storage_Pool is abstract
     new Ada.Finalization.Limited_Controlled with null record;
end System.Storage_Pools;