1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef ScopedEventQueue_h 32 #define ScopedEventQueue_h 33 34 #include <wtf/Noncopyable.h> 35 #include <wtf/PassOwnPtr.h> 36 #include <wtf/PassRefPtr.h> 37 #include <wtf/Vector.h> 38 39 namespace WebCore { 40 41 class Event; 42 43 class ScopedEventQueue { 44 WTF_MAKE_NONCOPYABLE(ScopedEventQueue); 45 46 public: 47 ~ScopedEventQueue(); 48 49 void enqueueEvent(PassRefPtr<Event>); 50 void dispatchAllEvents(); 51 static ScopedEventQueue* instance(); 52 53 void incrementScopingLevel(); 54 void decrementScopingLevel(); 55 56 private: 57 ScopedEventQueue(); 58 static void initialize(); 59 void dispatchEvent(PassRefPtr<Event>) const; 60 61 Vector<RefPtr<Event> > m_queuedEvents; 62 unsigned m_scopingLevel; 63 64 static ScopedEventQueue* s_instance; 65 }; 66 67 class EventQueueScope { 68 WTF_MAKE_NONCOPYABLE(EventQueueScope); 69 70 public: 71 EventQueueScope() { ScopedEventQueue::instance()->incrementScopingLevel(); } 72 ~EventQueueScope() { ScopedEventQueue::instance()->decrementScopingLevel(); } 73 }; 74 75 } 76 77 #endif // ScopedEventQueue_h 78
