157 lines
4.2 KiB
C++
157 lines
4.2 KiB
C++
/*
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* Copyright (C) 2008, 2013 Apple 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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*/
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#include "config.h"
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#include "SuspendableTimer.h"
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#include "ScriptExecutionContext.h"
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namespace WebCore {
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SuspendableTimerBase::SuspendableTimerBase(ScriptExecutionContext* context)
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: ActiveDOMObject(context)
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{
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}
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SuspendableTimerBase::~SuspendableTimerBase() = default;
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bool SuspendableTimerBase::virtualHasPendingActivity() const
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{
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return isActive();
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}
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void SuspendableTimerBase::stop()
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{
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if (!m_suspended)
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TimerBase::stop();
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// Make it less likely that SuspendableTimer is accidentally revived and fires after being stopped.
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// It is not allowed for an ActiveDOMObject to become active again after stop().
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m_suspended = true;
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m_savedIsActive = false;
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didStop();
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}
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void SuspendableTimerBase::suspend(ReasonForSuspension)
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{
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ASSERT(!m_suspended);
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m_suspended = true;
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m_savedIsActive = TimerBase::isActive();
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if (m_savedIsActive) {
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m_savedNextFireInterval = TimerBase::nextUnalignedFireInterval();
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m_savedRepeatInterval = TimerBase::repeatInterval();
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TimerBase::stop();
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}
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}
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void SuspendableTimerBase::resume()
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{
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ASSERT(m_suspended);
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m_suspended = false;
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if (m_savedIsActive)
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start(m_savedNextFireInterval, m_savedRepeatInterval);
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}
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void SuspendableTimerBase::didStop()
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{
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}
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void SuspendableTimerBase::cancel()
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{
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if (!m_suspended)
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TimerBase::stop();
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else
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m_suspended = false;
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}
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void SuspendableTimerBase::startRepeating(Seconds repeatInterval)
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{
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if (!m_suspended)
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TimerBase::startRepeating(repeatInterval);
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else {
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m_savedIsActive = true;
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m_savedNextFireInterval = repeatInterval;
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m_savedRepeatInterval = repeatInterval;
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}
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}
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void SuspendableTimerBase::startOneShot(Seconds interval)
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{
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if (!m_suspended)
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TimerBase::startOneShot(interval);
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else {
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m_savedIsActive = true;
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m_savedNextFireInterval = interval;
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m_savedRepeatInterval = 0_s;
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}
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}
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Seconds SuspendableTimerBase::repeatInterval() const
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{
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if (!m_suspended)
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return TimerBase::repeatInterval();
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if (m_savedIsActive)
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return m_savedRepeatInterval;
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return 0_s;
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}
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void SuspendableTimerBase::augmentFireInterval(Seconds delta)
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{
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if (!m_suspended)
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TimerBase::augmentFireInterval(delta);
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else if (m_savedIsActive) {
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m_savedNextFireInterval += delta;
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} else {
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m_savedIsActive = true;
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m_savedNextFireInterval = delta;
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m_savedRepeatInterval = 0_s;
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}
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}
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void SuspendableTimerBase::augmentRepeatInterval(Seconds delta)
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{
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if (!m_suspended)
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TimerBase::augmentRepeatInterval(delta);
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else if (m_savedIsActive) {
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m_savedNextFireInterval += delta;
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m_savedRepeatInterval += delta;
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} else {
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m_savedIsActive = true;
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m_savedNextFireInterval = delta;
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m_savedRepeatInterval = delta;
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}
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}
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const char* SuspendableTimer::activeDOMObjectName() const
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{
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return "SuspendableTimer";
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}
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} // namespace WebCore
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