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* Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <wtf/Noncopyable.h>
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#include <wtf/Threading.h>
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// Time intervals are all in seconds.
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class TimerHeapElement;
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WTF_MAKE_NONCOPYABLE(TimerBase); WTF_MAKE_FAST_ALLOCATED;
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void start(double nextFireInterval, double repeatInterval);
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void startRepeating(double repeatInterval) { start(repeatInterval, repeatInterval); }
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void startOneShot(double interval) { start(interval, 0); }
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bool isActive() const;
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double nextFireInterval() const;
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double repeatInterval() const { return m_repeatInterval; }
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void augmentFireInterval(double delta) { setNextFireTime(m_nextFireTime + delta); }
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void augmentRepeatInterval(double delta) { augmentFireInterval(delta); m_repeatInterval += delta; }
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static void fireTimersInNestedEventLoop();
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virtual void fired() = 0;
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void checkConsistency() const;
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void checkHeapIndex() const;
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void setNextFireTime(double);
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bool inHeap() const { return m_heapIndex != -1; }
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void heapDecreaseKey();
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void heapIncreaseKey();
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double m_nextFireTime; // 0 if inactive
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double m_repeatInterval; // 0 if not repeating
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int m_heapIndex; // -1 if not in heap
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unsigned m_heapInsertionOrder; // Used to keep order among equal-fire-time timers
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ThreadIdentifier m_thread;
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friend class TimerHeapElement;
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friend class ThreadTimers;
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friend bool operator<(const TimerHeapElement&, const TimerHeapElement&);
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template <typename TimerFiredClass> class Timer : public TimerBase {
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typedef void (TimerFiredClass::*TimerFiredFunction)(Timer*);
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Timer(TimerFiredClass* o, TimerFiredFunction f)
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: m_object(o), m_function(f) { }
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virtual void fired() { (m_object->*m_function)(this); }
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TimerFiredClass* m_object;
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TimerFiredFunction m_function;
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inline bool TimerBase::isActive() const
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ASSERT(m_thread == currentThread());
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return m_nextFireTime;