зеркало из https://github.com/mozilla/gecko-dev.git
90 строки
3.5 KiB
C++
90 строки
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** 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 Communicator client 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):
|
|
* Pierre Phaneuf <pp@ludusdesign.com>
|
|
*
|
|
* 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 ***** */
|
|
|
|
#include "prmon.h"
|
|
#include "nsIEventQueue.h"
|
|
#include "nsPIEventQueueChain.h"
|
|
|
|
class nsEventQueueImpl : public nsIEventQueue,
|
|
public nsPIEventQueueChain
|
|
{
|
|
public:
|
|
nsEventQueueImpl();
|
|
|
|
NS_DECL_ISUPPORTS
|
|
NS_DECL_NSIEVENTTARGET
|
|
NS_DECL_NSIEVENTQUEUE
|
|
|
|
// Helpers
|
|
static NS_METHOD Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr);
|
|
|
|
static const nsCID& CID() { static nsCID cid = NS_EVENTQUEUE_CID; return cid; }
|
|
|
|
// nsPIEventQueueChain interface
|
|
NS_IMETHOD AppendQueue(nsIEventQueue *aQueue);
|
|
NS_IMETHOD Unlink();
|
|
NS_IMETHOD GetYoungest(nsIEventQueue **aQueue);
|
|
NS_IMETHOD GetYoungestActive(nsIEventQueue **aQueue);
|
|
NS_IMETHOD SetYounger(nsPIEventQueueChain *aQueue);
|
|
NS_IMETHOD GetYounger(nsIEventQueue **aQueue);
|
|
NS_IMETHOD SetElder(nsPIEventQueueChain *aQueue);
|
|
NS_IMETHOD GetElder(nsIEventQueue **aQueue);
|
|
|
|
private:
|
|
~nsEventQueueImpl();
|
|
|
|
PLEventQueue *mEventQueue;
|
|
PRBool mAcceptingEvents, // accept new events or pass them on?
|
|
mCouldHaveEvents; // accepting new ones, or still have old ones?
|
|
nsCOMPtr<nsPIEventQueueChain> mElderQueue; // younger can hold on to elder
|
|
nsPIEventQueueChain *mYoungerQueue; // but elder can't hold on to younger
|
|
|
|
void NotifyObservers(const char *aTopic);
|
|
|
|
void CheckForDeactivation() {
|
|
if (mCouldHaveEvents && !mAcceptingEvents && !PL_EventAvailable(mEventQueue)) {
|
|
if (PL_IsQueueOnCurrentThread(mEventQueue)) {
|
|
mCouldHaveEvents = PR_FALSE;
|
|
NS_RELEASE_THIS(); // balance ADDREF from the constructor
|
|
} else
|
|
NS_ERROR("CheckForDeactivation called from wrong thread!");
|
|
}
|
|
}
|
|
};
|
|
|