internal void Pause()
{
lock(this)
{
// Delete the native timer so that no timers are fired in the Pause zone
if(m_appDomainTimer != null && !m_appDomainTimer.IsInvalid)
{
m_appDomainTimer.Dispose();
m_appDomainTimer = null;
m_isAppDomainTimerScheduled = false;
m_pauseTicks = TickCount;
}
}
}
static extern bool ChangeAppDomainTimer(AppDomainTimerSafeHandle handle, uint dueTime);
private static extern bool ChangeAppDomainTimer(AppDomainTimerSafeHandle handle, uint dueTime);
private bool EnsureAppDomainTimerFiresBy(uint requestedDuration)
{
//
// The VM's timer implementation does not work well for very long-duration timers.
// See kb 950807.
// So we'll limit our native timer duration to a "small" value.
// This may cause us to attempt to fire timers early, but that's ok -
// we'll just see that none of our timers has actually reached its due time,
// and schedule the native timer again.
//
const uint maxPossibleDuration = 0x0fffffff;
uint actualDuration = Math.Min(requestedDuration, maxPossibleDuration);
if (m_isAppDomainTimerScheduled)
{
uint elapsed = (uint)(TickCount - m_currentAppDomainTimerStartTicks);
if (elapsed >= m_currentAppDomainTimerDuration)
return true; //the timer's about to fire
uint remainingDuration = m_currentAppDomainTimerDuration - elapsed;
if (actualDuration >= remainingDuration)
return true; //the timer will fire earlier than this request
}
// If Pause is underway then do not schedule the timers
// A later update during resume will re-schedule
if(m_pauseTicks != 0)
{
Contract.Assert(!m_isAppDomainTimerScheduled);
Contract.Assert(m_appDomainTimer == null);
return true;
}
if (m_appDomainTimer == null || m_appDomainTimer.IsInvalid)
{
Contract.Assert(!m_isAppDomainTimerScheduled);
m_appDomainTimer = CreateAppDomainTimer(actualDuration);
if (!m_appDomainTimer.IsInvalid)
{
m_isAppDomainTimerScheduled = true;
m_currentAppDomainTimerStartTicks = TickCount;
m_currentAppDomainTimerDuration = actualDuration;
return true;
}
else
{
return false;
}
}
else
{
if (ChangeAppDomainTimer(m_appDomainTimer, actualDuration))
{
m_isAppDomainTimerScheduled = true;
m_currentAppDomainTimerStartTicks = TickCount;
m_currentAppDomainTimerDuration = actualDuration;
return true;
}
else
{
return false;
}
}
}
private bool EnsureAppDomainTimerFiresBy(uint requestedDuration)
{
//
// The VM's timer implementation does not work well for very long-duration timers.
// See kb 950807.
// So we'll limit our native timer duration to a "small" value.
// This may cause us to attempt to fire timers early, but that's ok -
// we'll just see that none of our timers has actually reached its due time,
// and schedule the native timer again.
//
const uint maxPossibleDuration = 0x0fffffff;
uint actualDuration = Math.Min(requestedDuration, maxPossibleDuration);
if (m_isAppDomainTimerScheduled)
{
uint elapsed = (uint)(TickCount - m_currentAppDomainTimerStartTicks);
if (elapsed >= m_currentAppDomainTimerDuration)
{
return(true); //the timer's about to fire
}
uint remainingDuration = m_currentAppDomainTimerDuration - elapsed;
if (actualDuration >= remainingDuration)
{
return(true); //the timer will fire earlier than this request
}
}
// If Pause is underway then do not schedule the timers
// A later update during resume will re-schedule
if (m_pauseTicks != 0)
{
Debug.Assert(!m_isAppDomainTimerScheduled);
Debug.Assert(m_appDomainTimer == null);
return(true);
}
if (m_appDomainTimer == null || m_appDomainTimer.IsInvalid)
{
Debug.Assert(!m_isAppDomainTimerScheduled);
Debug.Assert(m_id >= 0 && m_id < Instances.Length && this == Instances[m_id]);
m_appDomainTimer = CreateAppDomainTimer(actualDuration, m_id);
if (!m_appDomainTimer.IsInvalid)
{
m_isAppDomainTimerScheduled = true;
m_currentAppDomainTimerStartTicks = TickCount;
m_currentAppDomainTimerDuration = actualDuration;
return(true);
}
else
{
return(false);
}
}
else
{
if (ChangeAppDomainTimer(m_appDomainTimer, actualDuration))
{
m_isAppDomainTimerScheduled = true;
m_currentAppDomainTimerStartTicks = TickCount;
m_currentAppDomainTimerDuration = actualDuration;
return(true);
}
else
{
return(false);
}
}
}
