gecko-dev/xpcom/threads/nsEventQueueService.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef nsEventQueueService_h__
#define nsEventQueueService_h__
#include "nsIEventQueueService.h"
#include "nsHashtable.h"
class nsIEventQueue;
class EventQueueEntry;
// because available enumerators can't handle deletions during enumeration
class EventQueueEntryEnumerator {
public:
EventQueueEntryEnumerator();
virtual ~EventQueueEntryEnumerator();
void Reset(EventQueueEntry *aStart);
EventQueueEntry *Get(void);
void Skip(EventQueueEntry *aSkip);
private:
EventQueueEntry *mCurrent;
};
////////////////////////////////////////////////////////////////////////////////
class nsEventQueueServiceImpl : public nsIEventQueueService
{
friend class EventQueueEntry;
public:
nsEventQueueServiceImpl();
virtual ~nsEventQueueServiceImpl();
static NS_METHOD
Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);
// nsISupports interface...
NS_DECL_ISUPPORTS
// nsIEventQueueService interface...
NS_IMETHOD CreateThreadEventQueue();
NS_IMETHOD CreateMonitoredThreadEventQueue();
NS_IMETHOD DestroyThreadEventQueue(void);
NS_IMETHOD GetThreadEventQueue(PRThread* aThread, nsIEventQueue** aResult);
NS_IMETHOD ResolveEventQueue(nsIEventQueue* queueOrConstant, nsIEventQueue* *resultQueue);
NS_IMETHOD CreateFromIThread(nsIThread *aThread, PRBool aNative,
nsIEventQueue **aResult);
NS_IMETHOD CreateFromPLEventQueue(PLEventQueue* aPLEventQueue, nsIEventQueue** aResult);
NS_IMETHOD PushThreadEventQueue(nsIEventQueue **aNewQueue);
NS_IMETHOD PopThreadEventQueue(nsIEventQueue *aQueue);
private:
/* Create a queue for the given thread if one does not exist.
Addref the descriptor in any case. parameter aNative is
ignored if the queue already exists. */
NS_IMETHOD CreateEventQueue(PRThread *aThread, PRBool aNative);
void AddEventQueueEntry(EventQueueEntry *aEntry);
void RemoveEventQueueEntry(EventQueueEntry *aEntry);
nsHashtable *mEventQTable;
EventQueueEntry *mBaseEntry;
PRMonitor *mEventQMonitor;
EventQueueEntryEnumerator mEnumerator;
};
////////////////////////////////////////////////////////////////////////////////
#endif // nsEventQueueService_h__