| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- SYSTEM.STORAGE_POOLS.SUBPOOLS.FINALIZATION -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2011-2021, 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 3, 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. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| with Ada.Unchecked_Deallocation; |
| |
| with System.Finalization_Masters; use System.Finalization_Masters; |
| |
| package body System.Storage_Pools.Subpools.Finalization is |
| |
| ----------------------------- |
| -- Finalize_And_Deallocate -- |
| ----------------------------- |
| |
| procedure Finalize_And_Deallocate (Subpool : in out Subpool_Handle) is |
| procedure Free is new Ada.Unchecked_Deallocation (SP_Node, SP_Node_Ptr); |
| |
| begin |
| -- Do nothing if the subpool was never created or never used. The latter |
| -- case may arise with an array of subpool implementations. |
| |
| if Subpool = null |
| or else Subpool.Owner = null |
| or else Subpool.Node = null |
| then |
| return; |
| end if; |
| |
| -- Clean up all controlled objects chained on the subpool's master |
| |
| Finalize (Subpool.Master); |
| |
| -- Remove the subpool from its owner's list of subpools |
| |
| Detach (Subpool.Node); |
| |
| -- Destroy the associated doubly linked list node which was created in |
| -- Set_Pool_Of_Subpools. |
| |
| Free (Subpool.Node); |
| |
| -- Dispatch to the user-defined implementation of Deallocate_Subpool. It |
| -- is important to first set Subpool.Owner to null, because RM-13.11.5 |
| -- requires that "The subpool no longer belongs to any pool" BEFORE |
| -- calling Deallocate_Subpool. The actual dispatching call required is: |
| -- |
| -- Deallocate_Subpool(Pool_Of_Subpool(Subpool).all, Subpool); |
| -- |
| -- but that can't be taken literally, because Pool_Of_Subpool will |
| -- return null. |
| |
| declare |
| Owner : constant Any_Storage_Pool_With_Subpools_Ptr := Subpool.Owner; |
| begin |
| Subpool.Owner := null; |
| Deallocate_Subpool (Owner.all, Subpool); |
| end; |
| |
| Subpool := null; |
| end Finalize_And_Deallocate; |
| |
| end System.Storage_Pools.Subpools.Finalization; |
