private void onRoomUpdated() => Scheduler.AddOnce(() =>
{
if (countdown != room?.Countdown)
{
countdown = room?.Countdown;
countdownChangeTime = Time.Current;
}
scheduleNextCountdownUpdate();
updateButtonText();
updateButtonColour();
});
private void startCountdown(MultiplayerCountdown countdown, Func <Task> continuation)
{
Debug.Assert(Room != null);
Debug.Assert(ThreadSafety.IsUpdateThread);
stopCountdown();
// Note that this will leak CTSs, however this is a test method and we haven't noticed foregoing disposal of non-linked CTSs to be detrimental.
// If necessary, this can be moved into the final schedule below, and the class-level fields be nulled out accordingly.
var stopSource = countdownStopSource = new CancellationTokenSource();
var skipSource = countdownSkipSource = new CancellationTokenSource();
Task lastCountdownTask = countdownTask;
countdownTask = start();
async Task start()
{
await lastCountdownTask;
Schedule(() =>
{
if (stopSource.IsCancellationRequested)
{
return;
}
Room.Countdown = countdown;
MatchEvent(new CountdownChangedEvent {
Countdown = countdown
});
});
try
{
using (var cancellationSource = CancellationTokenSource.CreateLinkedTokenSource(stopSource.Token, skipSource.Token))
await Task.Delay(countdown.TimeRemaining, cancellationSource.Token).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
// Clients need to be notified of cancellations in the following code.
}
Schedule(() =>
{
if (Room.Countdown != countdown)
{
return;
}
Room.Countdown = null;
MatchEvent(new CountdownChangedEvent {
Countdown = null
});
if (stopSource.IsCancellationRequested)
{
return;
}
continuation().WaitSafely();
});
}
}