1 /*
2  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
3  * Copyright (C) 2009 Google Inc.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #ifndef ThreadTimers_h
28 #define ThreadTimers_h
29 
30 #include <wtf/Noncopyable.h>
31 #include <wtf/HashSet.h>
32 #include <wtf/Vector.h>
33 
34 namespace WebCore {
35 
36     class SharedTimer;
37     class TimerBase;
38 
39     // A collection of timers per thread. Kept in ThreadGlobalData.
40     class ThreadTimers {
41         WTF_MAKE_NONCOPYABLE(ThreadTimers); WTF_MAKE_FAST_ALLOCATED;
42     public:
43         ThreadTimers();
44 
45         // On a thread different then main, we should set the thread's instance of the SharedTimer.
46         void setSharedTimer(SharedTimer*);
47 
timerHeap()48         Vector<TimerBase*>& timerHeap() { return m_timerHeap; }
49 
50         void updateSharedTimer();
51         void fireTimersInNestedEventLoop();
52 
53     private:
54         static void sharedTimerFired();
55 
56         void sharedTimerFiredInternal();
57         void fireTimersInNestedEventLoopInternal();
58 
59         Vector<TimerBase*> m_timerHeap;
60         SharedTimer* m_sharedTimer; // External object, can be a run loop on a worker thread. Normally set/reset by worker thread.
61         bool m_firingTimers; // Reentrancy guard.
62     };
63 
64 }
65 
66 #endif
67