void ProcessThrottler::updateAssertion()
{
// If the process is currently runnable but will be suspended then first give it a chance to complete what it was doing
// and clean up - move it to the background and send it a message to notify. Schedule a timeout so it can't stay running
// in the background for too long.
if (m_assertion && m_assertion->state() != AssertionState::Suspended && !m_foregroundCounter.value() && !m_backgroundCounter.value()) {
++m_suspendMessageCount;
RELEASE_LOG("%p - ProcessThrottler::updateAssertion() sending PrepareToSuspend IPC", this);
m_process.sendPrepareToSuspend();
m_suspendTimer.startOneShot(processSuspensionTimeout);
m_assertion->setState(AssertionState::Background);
m_process.didSetAssertionState(AssertionState::Background);
return;
}
bool shouldBeRunnable = m_foregroundCounter.value() || m_backgroundCounter.value();
// If we're currently waiting for the Web process to do suspension cleanup, but no longer need to be suspended, tell the Web process to cancel the cleanup.
if (m_suspendTimer.isActive() && shouldBeRunnable)
m_process.sendCancelPrepareToSuspend();
if (m_assertion && m_assertion->state() == AssertionState::Suspended && shouldBeRunnable)
m_process.sendProcessDidResume();
updateAssertionNow();
}
void ProcessThrottler::updateAssertion()
{
// If the process is currently runnable but will be suspended then first give it a chance to complete what it was doing
// and clean up - move it to the background and send it a message to notify. Schedule a timeout so it can't stay running
// in the background for too long.
if (m_assertion && m_assertion->state() != AssertionState::Suspended && !m_foregroundCount && !m_backgroundCount) {
++m_suspendMessageCount;
m_process->sendProcessWillSuspend();
m_suspendTimer.startOneShot(processSuspensionTimeout);
m_assertion->setState(AssertionState::Background);
return;
}
// If we're currently waiting for the Web process to do suspension cleanup, but no longer need to be suspended, tell the Web process to cancel the cleanup.
if (m_suspendTimer.isActive() && (m_foregroundCount || m_backgroundCount))
m_process->sendCancelProcessWillSuspend();
updateAssertionNow();
}
void ProcessThrottler::didCancelProcessSuspension()
{
if (!--m_suspendMessageCount)
updateAssertionNow();
ASSERT(m_suspendMessageCount >= 0);
}
void ProcessThrottler::processReadyToSuspend()
{
if (!--m_suspendMessageCount)
updateAssertionNow();
ASSERT(m_suspendMessageCount >= 0);
}
void ProcessThrottler::suspendTimerFired(WebCore::Timer<ProcessThrottler>*)
{
updateAssertionNow();
}
void ProcessThrottler::suspendTimerFired()
{
updateAssertionNow();
}
