/// <summary>
/// Wait until the first scheduled alarm is ready to be handled
/// Assumes that we have a lock on the _schedule SortedSet
/// </summary>
private Time GetNextEvent()
{
// Wait for an alarm to be scheduled on the condition variable Count
while (_schedule.Count == 0)
{
Monitor.Wait(_schedule);
}
// Once the alarm is scheduled, wait for the prescribed amount of time.
// If a new alarm is scheduled with a shorter duration, Wait will preempt
// and duration will update to reflect the new alarm's timestamp
for (long duration = _timer.GetDuration(_schedule.First().TimeStamp);
duration > 0;
duration = _timer.GetDuration(_schedule.First().TimeStamp))
{
Monitor.Wait(_schedule, TimeSpan.FromMilliseconds(duration));
}
return(_schedule.Dequeue());
}