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1996-02-12
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82 lines
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . P O O L _ E M P T Y --
-- --
-- S p e c --
-- --
-- $Revision: 1.5 $ --
-- --
-- Copyright (C) 1992,1993,1994 Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
with System.Storage_Pools;
with System.Storage_Elements;
package System.Pool_Empty is
pragma Elaborate_Body;
-- Needed to ensure that library routines can execute allocators
----------------
-- Empty_Pool --
----------------
-- Allocation strategy:
-- Raise storage Error on Allocate
-- Used in the compiler for access types with 'STORAGE_SIZE = 0
-- Avoid any overhead for Init/Finalize
type Empty_Pool is new
System.Storage_Pools.Root_Storage_Pool with null record;
function Storage_Size
(Pool : Empty_Pool)
return System.Storage_Elements.Storage_Count;
procedure Allocate
(Pool : in out Empty_Pool;
Address : out System.Address;
Storage_Size : System.Storage_Elements.Storage_Count;
Alignment : System.Storage_Elements.Storage_Count);
procedure Deallocate
(Pool : in out Empty_Pool;
Address : System.Address;
Storage_Size : System.Storage_Elements.Storage_Count;
Alignment : System.Storage_Elements.Storage_Count);
procedure Initialize (Pool : in out Empty_Pool);
procedure Finalize (Pool : in out Empty_Pool);
-- The only actual instance of this type
Empty_Pool_Object : Empty_Pool;
end System.Pool_Empty;