public ModeService(ServiceCreationInfo info)
: base("mode", info)
{
mCurrentMode = new Mode("<none>");
mChangeQueue = new List <ModeChange>();
mQueueEvent = new AsyncEvent();
Task.Run(async() =>
{
while (true)
{
// Retry once we have something in the queue.
if (mChangeQueue.Count == 0)
{
await mQueueEvent.Wait();
continue;
}
ModeChange change;
var delay = TimeSpan.Zero;
lock (mChangeQueue)
{
change = mChangeQueue[0];
delay = change.ActivationTime - DateTime.Now;
mQueueEvent.Reset();
if (delay <= TimeSpan.Zero)
{
mChangeQueue.RemoveAt(0);
}
}
if (delay > TimeSpan.Zero)
{
using (var delayTokenSource = new CancellationTokenSource())
{
var tasks = new Task[] { mQueueEvent.Wait(), Task.Delay(delay, delayTokenSource.Token) };
await Task.WhenAny(tasks);
}
continue;
}
CurrentMode = change.Mode;
}
});
}
