90 lines
4.1 KiB
Ada
90 lines
4.1 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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-- SYSTEM.STORAGE_POOLS.SUBPOOLS.FINALIZATION --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2011-2014, Free Software Foundation, Inc. --
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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.Unchecked_Deallocation;
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with System.Finalization_Masters; use System.Finalization_Masters;
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package body System.Storage_Pools.Subpools.Finalization is
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-----------------------------
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-- Finalize_And_Deallocate --
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-----------------------------
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procedure Finalize_And_Deallocate (Subpool : in out Subpool_Handle) is
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procedure Free is new Ada.Unchecked_Deallocation (SP_Node, SP_Node_Ptr);
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begin
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-- Do nothing if the subpool was never created or never used. The latter
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-- case may arise with an array of subpool implementations.
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if Subpool = null
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or else Subpool.Owner = null
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or else Subpool.Node = null
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then
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return;
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end if;
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-- Clean up all controlled objects chained on the subpool's master
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Finalize (Subpool.Master);
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-- Remove the subpool from its owner's list of subpools
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Detach (Subpool.Node);
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-- Destroy the associated doubly linked list node which was created in
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-- Set_Pool_Of_Subpools.
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Free (Subpool.Node);
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-- Dispatch to the user-defined implementation of Deallocate_Subpool. It
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-- is important to first set Subpool.Owner to null, because RM-13.11.5
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-- requires that "The subpool no longer belongs to any pool" BEFORE
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-- calling Deallocate_Subpool. The actual dispatching call required is:
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--
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-- Deallocate_Subpool(Pool_of_Subpool(Subpool).all, Subpool);
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--
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-- but that can't be taken literally, because Pool_of_Subpool will
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-- return null.
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declare
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Owner : constant Any_Storage_Pool_With_Subpools_Ptr := Subpool.Owner;
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begin
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Subpool.Owner := null;
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Deallocate_Subpool (Owner.all, Subpool);
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end;
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Subpool := null;
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end Finalize_And_Deallocate;
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end System.Storage_Pools.Subpools.Finalization;
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