1 : /* vim:set ts=4 sw=4 sts=4 et cin: */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Mozilla.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 2003
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Darin Fisher <darin@meer.net>
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either the GNU General Public License Version 2 or later (the "GPL"), or
27 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
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32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #include "nsProxyRelease.h"
40 : #include "nsThreadUtils.h"
41 : #include "nsAutoPtr.h"
42 :
43 : class nsProxyReleaseEvent : public nsRunnable
44 0 : {
45 : public:
46 0 : nsProxyReleaseEvent(nsISupports *doomed)
47 0 : : mDoomed(doomed) {
48 0 : }
49 :
50 0 : NS_IMETHOD Run()
51 : {
52 0 : mDoomed->Release();
53 0 : return NS_OK;
54 : }
55 :
56 : private:
57 : nsISupports *mDoomed;
58 : };
59 :
60 : nsresult
61 0 : NS_ProxyRelease(nsIEventTarget *target, nsISupports *doomed,
62 : bool alwaysProxy)
63 : {
64 : nsresult rv;
65 :
66 0 : if (!target) {
67 0 : NS_RELEASE(doomed);
68 0 : return NS_OK;
69 : }
70 :
71 0 : if (!alwaysProxy) {
72 0 : bool onCurrentThread = false;
73 0 : rv = target->IsOnCurrentThread(&onCurrentThread);
74 0 : if (NS_SUCCEEDED(rv) && onCurrentThread) {
75 0 : NS_RELEASE(doomed);
76 0 : return NS_OK;
77 : }
78 : }
79 :
80 0 : nsRefPtr<nsIRunnable> ev = new nsProxyReleaseEvent(doomed);
81 0 : if (!ev) {
82 : // we do not release doomed here since it may cause a delete on the
83 : // wrong thread. better to leak than crash.
84 0 : return NS_ERROR_OUT_OF_MEMORY;
85 : }
86 :
87 0 : rv = target->Dispatch(ev, NS_DISPATCH_NORMAL);
88 0 : if (NS_FAILED(rv)) {
89 0 : NS_WARNING("failed to post proxy release event");
90 : // again, it is better to leak the doomed object than risk crashing as
91 : // a result of deleting it on the wrong thread.
92 : }
93 0 : return rv;
94 : }
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