void ThreadTimers::sharedTimerFiredInternal()
{
// Do a re-entrancy check.
if (m_firingTimers)
return;
m_firingTimers = true;
m_pendingSharedTimerFireTime = 0;
double fireTime = monotonicallyIncreasingTime();
double timeToQuit = fireTime + maxDurationOfFiringTimers;
while (!m_timerHeap.isEmpty() && m_timerHeap.first()->m_nextFireTime <= fireTime) {
TimerBase* timer = m_timerHeap.first();
timer->m_nextFireTime = 0;
timer->m_unalignedNextFireTime = 0;
timer->heapDeleteMin();
double interval = timer->repeatInterval();
timer->setNextFireTime(interval ? fireTime + interval : 0);
// Once the timer has been fired, it may be deleted, so do nothing else with it after this point.
timer->fired();
// Catch the case where the timer asked timers to fire in a nested event loop, or we are over time limit.
if (!m_firingTimers || timeToQuit < monotonicallyIncreasingTime())
break;
}
m_firingTimers = false;
updateSharedTimer();
}
void setDeferringTimers(bool shouldDefer)
{
if (shouldDefer == deferringTimers)
return;
deferringTimers = shouldDefer;
updateSharedTimer();
}
void TimerBase::setNextFireTime(double newTime)
{
// Keep heap valid while changing the next-fire time.
if (timersReadyToFire)
timersReadyToFire->remove(this);
double oldTime = m_nextFireTime;
if (oldTime != newTime) {
m_nextFireTime = newTime;
bool wasFirstTimerInHeap = m_heapIndex == 0;
if (oldTime == 0)
heapInsert();
else if (newTime == 0)
heapDelete();
else if (newTime < oldTime)
heapDecreaseKey();
else
heapIncreaseKey();
bool isFirstTimerInHeap = m_heapIndex == 0;
if (wasFirstTimerInHeap || isFirstTimerInHeap)
updateSharedTimer();
}
checkConsistency();
}
void ThreadTimers::fireTimersInNestedEventLoop()
{
// Reset the reentrancy guard so the timers can fire again.
m_firingTimers = false;
if (m_sharedTimer) {
m_sharedTimer->invalidate();
m_pendingSharedTimerFireTime = 0;
}
updateSharedTimer();
}
// A worker thread may initialize SharedTimer after some timers are created.
// Also, SharedTimer can be replaced with 0 before all timers are destroyed.
void ThreadTimers::setSharedTimer(SharedTimer* sharedTimer)
{
if (m_sharedTimer) {
m_sharedTimer->setFiredFunction(0);
m_sharedTimer->stop();
m_pendingSharedTimerFireTime = 0;
}
m_sharedTimer = sharedTimer;
if (sharedTimer) {
m_sharedTimer->setFiredFunction(ThreadTimers::sharedTimerFired);
updateSharedTimer();
}
}
// A worker thread may initialize SharedTimer after some timers are created.
// Also, SharedTimer can be replaced with nullptr before all timers are destroyed.
void ThreadTimers::setSharedTimer(SharedTimer* sharedTimer)
{
if (m_sharedTimer) {
m_sharedTimer->setFiredFunction(nullptr);
m_sharedTimer->stop();
m_pendingSharedTimerFireTime = 0;
}
m_sharedTimer = sharedTimer;
if (sharedTimer) {
m_sharedTimer->setFiredFunction([] { threadGlobalData().threadTimers().sharedTimerFiredInternal(); });
updateSharedTimer();
}
}
void TimerBase::sharedTimerFired()
{
// Do a re-entrancy check.
if (timersReadyToFire)
return;
double fireTime = currentTime();
Vector<TimerBase*> firingTimers;
HashSet<const TimerBase*> firingTimersSet;
timersReadyToFire = &firingTimersSet;
collectFiringTimers(fireTime, firingTimers);
fireTimers(fireTime, firingTimers);
timersReadyToFire = 0;
updateSharedTimer();
}
void ThreadTimers::sharedTimerFiredInternal()
{
// Do a re-entrancy check.
if (m_firingTimers)
return;
m_firingTimers = true;
m_pendingSharedTimerFireTime = 0;
double fireTime = monotonicallyIncreasingTime();
double timeToQuit = fireTime + maxDurationOfFiringTimers;
while (!m_timerHeap.isEmpty() && m_timerHeap.first()->m_nextFireTime <= fireTime) {
TimerBase& timer = *m_timerHeap.first();
timer.m_nextFireTime = 0;
timer.m_unalignedNextFireTime = 0;
timer.heapDeleteMin();
double interval = timer.repeatInterval();
timer.setNextFireTime(interval ? fireTime + interval : 0);
TRACE_EVENT2("blink", "ThreadTimers::sharedTimerFiredInternal",
"src_file", timer.location().fileName(),
"src_func", timer.location().functionName());
// Once the timer has been fired, it may be deleted, so do nothing else with it after this point.
timer.fired();
// Catch the case where the timer asked timers to fire in a nested event loop, or we are over time limit.
if (!m_firingTimers || timeToQuit < monotonicallyIncreasingTime()
|| (isMainThread() && Platform::current()->currentThread()->scheduler()->shouldYieldForHighPriorityWork()))
break;
}
m_firingTimers = false;
updateSharedTimer();
}
void ThreadTimers::fireTimersInNestedEventLoop()
{
// Reset the reentrancy guard so the timers can fire again.
m_firingTimers = false;
updateSharedTimer();
}
void TimerBase::fireTimersInNestedEventLoop()
{
timersReadyToFire = 0;
updateSharedTimer();
}