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