101 lines
5.3 KiB
Ada
101 lines
5.3 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S Y S T E M . S T O R A G E _ P O O L S --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1992-2013, Free Software Foundation, Inc. --
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-- --
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-- This specification is derived from the Ada Reference Manual for use with --
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-- GNAT. The copyright notice above, and the license provisions that follow --
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-- apply solely to the contents of the part following the private keyword. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Ada.Finalization;
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with System.Storage_Elements;
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package System.Storage_Pools is
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pragma Preelaborate;
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type Root_Storage_Pool is abstract
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new Ada.Finalization.Limited_Controlled with private;
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pragma Preelaborable_Initialization (Root_Storage_Pool);
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procedure Allocate
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(Pool : in out Root_Storage_Pool;
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Storage_Address : out System.Address;
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Size_In_Storage_Elements : System.Storage_Elements.Storage_Count;
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Alignment : System.Storage_Elements.Storage_Count)
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is abstract;
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procedure Deallocate
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(Pool : in out Root_Storage_Pool;
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Storage_Address : System.Address;
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Size_In_Storage_Elements : System.Storage_Elements.Storage_Count;
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Alignment : System.Storage_Elements.Storage_Count)
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is abstract;
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function Storage_Size
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(Pool : Root_Storage_Pool)
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return System.Storage_Elements.Storage_Count
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is abstract;
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private
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type Root_Storage_Pool is abstract
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new Ada.Finalization.Limited_Controlled with null record;
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type Root_Storage_Pool_Ptr is access all Root_Storage_Pool'Class;
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for Root_Storage_Pool_Ptr'Storage_Size use 0;
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-- Type of the BIP_Storage_Pool extra parameter (see Exp_Ch6). The
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-- Storage_Size clause is necessary, because otherwise we have a
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-- chicken&egg problem; we can't be creating collection finalization code
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-- in this low-level package, because that involves Pool_Global, which
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-- imports this package.
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-- ??? Are these two still needed? It might be possible to use Subpools.
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-- Allocate_Any_Controlled / Deallocate_Any_Controlled for non-controlled
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-- objects.
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-- The following two procedures support the use of class-wide pool
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-- objects in storage pools. When a local type is given a class-wide
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-- storage pool, allocation and deallocation for the type must dispatch
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-- to the operation of the specific pool, which is achieved by a call
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-- to these procedures. (When the pool type is specific, the back-end
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-- generates a call to the statically identified operation of the type).
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procedure Allocate_Any
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(Pool : in out Root_Storage_Pool'Class;
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Storage_Address : out System.Address;
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Size_In_Storage_Elements : System.Storage_Elements.Storage_Count;
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Alignment : System.Storage_Elements.Storage_Count);
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procedure Deallocate_Any
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(Pool : in out Root_Storage_Pool'Class;
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Storage_Address : System.Address;
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Size_In_Storage_Elements : System.Storage_Elements.Storage_Count;
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Alignment : System.Storage_Elements.Storage_Count);
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end System.Storage_Pools;
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