1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- SYSTEM.STORAGE_POOLS.SUBPOOLS.FINALIZATION --
-- --
-- B o d y --
-- --
-- Copyright (C) 2011-2022, 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;
|
