135 lines
4.2 KiB
C++
135 lines
4.2 KiB
C++
/*
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* Copyright (C) 2006 Apple Inc. All rights reserved.
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* Copyright (C) 2009 Google Inc. All rights reserved.
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*
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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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* are met:
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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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*
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* THIS SOFTWARE IS PROVIDED BY APPLE 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 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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*/
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#ifndef ThreadTimers_h
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#define ThreadTimers_h
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#include <wtf/MonotonicTime.h>
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#include <wtf/Noncopyable.h>
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#include <wtf/RefCounted.h>
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#include <wtf/ThreadSafeRefCounted.h>
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#include <wtf/Vector.h>
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namespace WebCore {
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class SharedTimer;
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class ThreadTimers;
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class TimerBase;
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struct ThreadTimerHeapItem;
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typedef Vector<RefPtr<ThreadTimerHeapItem>> ThreadTimerHeap;
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// A collection of timers per thread. Kept in ThreadGlobalData.
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class ThreadTimers {
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WTF_MAKE_NONCOPYABLE(ThreadTimers); WTF_MAKE_FAST_ALLOCATED;
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public:
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ThreadTimers();
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// On a thread different then main, we should set the thread's instance of the SharedTimer.
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void setSharedTimer(SharedTimer*);
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ThreadTimerHeap& timerHeap() { return m_timerHeap; }
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void updateSharedTimer();
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void fireTimersInNestedEventLoop();
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void breakFireLoopForRenderingUpdate();
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unsigned nextHeapInsertionCount() { return m_currentHeapInsertionOrder++; }
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private:
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void sharedTimerFiredInternal();
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void fireTimersInNestedEventLoopInternal();
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ThreadTimerHeap m_timerHeap;
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SharedTimer* m_sharedTimer { nullptr }; // External object, can be a run loop on a worker thread. Normally set/reset by worker thread.
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bool m_firingTimers { false };
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bool m_shouldBreakFireLoopForRenderingUpdate { false };
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unsigned m_currentHeapInsertionOrder { 0 };
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MonotonicTime m_pendingSharedTimerFireTime;
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};
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struct ThreadTimerHeapItem : ThreadSafeRefCounted<ThreadTimerHeapItem> {
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static RefPtr<ThreadTimerHeapItem> create(TimerBase&, MonotonicTime, unsigned);
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bool hasTimer() const { return m_timer; }
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TimerBase& timer();
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void clearTimer();
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ThreadTimerHeap& timerHeap() const;
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unsigned heapIndex() const;
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void setHeapIndex(unsigned newIndex);
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void setNotInHeap() { m_heapIndex = invalidHeapIndex; }
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bool isInHeap() const { return m_heapIndex != invalidHeapIndex; }
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bool isFirstInHeap() const { return !m_heapIndex; }
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MonotonicTime time;
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unsigned insertionOrder { 0 };
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private:
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ThreadTimers& m_threadTimers;
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TimerBase* m_timer { nullptr };
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unsigned m_heapIndex { invalidHeapIndex };
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static const unsigned invalidHeapIndex = static_cast<unsigned>(-1);
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ThreadTimerHeapItem(TimerBase&, MonotonicTime, unsigned);
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};
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inline TimerBase& ThreadTimerHeapItem::timer()
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{
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ASSERT(m_timer);
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return *m_timer;
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}
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inline void ThreadTimerHeapItem::clearTimer()
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{
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ASSERT(!isInHeap());
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m_timer = nullptr;
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}
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inline unsigned ThreadTimerHeapItem::heapIndex() const
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{
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ASSERT(m_heapIndex != invalidHeapIndex);
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return static_cast<unsigned>(m_heapIndex);
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}
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inline void ThreadTimerHeapItem::setHeapIndex(unsigned newIndex)
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{
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ASSERT(newIndex != invalidHeapIndex);
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m_heapIndex = newIndex;
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}
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inline ThreadTimerHeap& ThreadTimerHeapItem::timerHeap() const
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{
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return m_threadTimers.timerHeap();
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}
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}
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#endif
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