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Diffstat (limited to 'src/libs/xpcom18a4/xpcom/proxy/public/nsProxyRelease.h')
| -rw-r--r-- | src/libs/xpcom18a4/xpcom/proxy/public/nsProxyRelease.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/proxy/public/nsProxyRelease.h b/src/libs/xpcom18a4/xpcom/proxy/public/nsProxyRelease.h new file mode 100644 index 00000000..413a3d0e --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/proxy/public/nsProxyRelease.h @@ -0,0 +1,112 @@ +/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 3 -*- */ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla 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/MPL/ + * + * 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 of 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 MPL, 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 MPL, 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 target thread. + * + * @param target + * the target thread where the doomed object should be released. + * @param doomed + * the doomed object; the object to be released on the target thread. + * @param alwaysProxy + * normally, if NS_ProxyRelease is called on the target thread, then the + * doomed object will released directly. however, if this parameter is + * true, then a PLEvent will always be posted to the target thread and + * the release will happen when that PLEvent is handled. + */ +NS_COM nsresult NS_ProxyRelease + (nsIEventTarget *target, nsISupports *doomed, PRBool alwaysProxy=PR_FALSE); + + +#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; \ + static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID); \ + 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->IsOnCurrentThread(&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 |