зеркало из https://github.com/mozilla/pjs.git
151 строка
7.0 KiB
C
151 строка
7.0 KiB
C
/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 3 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.1 (the "License"); you may not use this file except in
|
|
* compliance with the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the NPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the NPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef nsProxyRelease_h_
|
|
#define nsProxyRelease_h__
|
|
|
|
#include "nsIEventQueueService.h"
|
|
#include "pratom.h"
|
|
#include "prmem.h"
|
|
|
|
// Ensures that the delete of a nsISupports object occurs on the main thread.
|
|
|
|
static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
|
|
|
|
static void* PR_CALLBACK
|
|
ReleaseDestructorEventHandler(PLEvent *self)
|
|
{
|
|
nsISupports* owner = (nsISupports*) PL_GetEventOwner(self);
|
|
NS_RELEASE(owner);
|
|
return nsnull;
|
|
}
|
|
|
|
static void PR_CALLBACK
|
|
ReleaseDestructorDestroyHandler(PLEvent *self)
|
|
{
|
|
delete self;
|
|
}
|
|
|
|
static void
|
|
NS_ProxyRelease(nsIEventQueue *eventQ, nsISupports *doomed, PRBool alwaysProxy=PR_FALSE)
|
|
{
|
|
if (!doomed)
|
|
return;
|
|
|
|
if (!eventQ) {
|
|
NS_RELEASE(doomed);
|
|
return;
|
|
}
|
|
|
|
if (!alwaysProxy) {
|
|
PRBool onCurrentThread = PR_FALSE;
|
|
eventQ->IsQueueOnCurrentThread(&onCurrentThread);
|
|
if (onCurrentThread) {
|
|
NS_RELEASE(doomed);
|
|
return;
|
|
}
|
|
}
|
|
|
|
PLEvent *ev = new PLEvent;
|
|
if (!ev) {
|
|
NS_ERROR("failed to allocate PLEvent");
|
|
// we do not release doomed here since it may cause a delete on the the
|
|
// wrong thread. better to leak than crash.
|
|
return;
|
|
}
|
|
|
|
PL_InitEvent(ev,
|
|
(void *) doomed,
|
|
ReleaseDestructorEventHandler,
|
|
ReleaseDestructorDestroyHandler);
|
|
|
|
PRStatus rv = eventQ->PostEvent(ev);
|
|
NS_ASSERTION(rv == PR_SUCCESS, "PostEvent failed");
|
|
}
|
|
|
|
|
|
#define NS_IMPL_PROXY_RELEASE(_class) \
|
|
NS_IMETHODIMP_(nsrefcnt) _class::Release(void) \
|
|
{ \
|
|
NS_PRECONDITION(0 != mRefCnt, "dup release"); \
|
|
nsrefcnt count = PR_AtomicDecrement((PRInt32 *)&mRefCnt); \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
\
|
|
if (count == 0) \
|
|
{ \
|
|
mRefCnt = 1; /* stabilize */ \
|
|
PRBool callDirectly = PR_TRUE; \
|
|
nsCOMPtr<nsIEventQueueService> eventQService \
|
|
= do_GetService(kEventQueueServiceCID); \
|
|
NS_ASSERTION(eventQService, "event queue service is unavailable"); \
|
|
\
|
|
nsCOMPtr<nsIEventQueue> eventQ; \
|
|
if (eventQService) { \
|
|
eventQService->GetThreadEventQueue(NS_UI_THREAD, getter_AddRefs(eventQ)); \
|
|
if (eventQ) \
|
|
eventQ->IsQueueOnCurrentThread(&callDirectly); \
|
|
} \
|
|
\
|
|
if (callDirectly) \
|
|
{ \
|
|
NS_RELEASE(this); \
|
|
return 0; \
|
|
} \
|
|
PLEvent *event = new PLEvent; \
|
|
if (event == nsnull) \
|
|
{ \
|
|
NS_ASSERTION(0, "Could not create a plevent. Deleting on wrong thread!"); \
|
|
NS_DELETEXPCOM(this); \
|
|
return 0; \
|
|
} \
|
|
\
|
|
PL_InitEvent(event, \
|
|
NS_STATIC_CAST(nsISupports*, this), \
|
|
ReleaseDestructorEventHandler, \
|
|
ReleaseDestructorDestroyHandler); \
|
|
\
|
|
eventQ->PostEvent(event); \
|
|
return 0; \
|
|
} \
|
|
return count; \
|
|
} \
|
|
|
|
|
|
|
|
|
|
#endif
|