void _Start()
{
if (status == AdvertisementWatcherStatus.Started)
{
throw new InvalidOperationException("Watcher is already running");
}
if (status == AdvertisementWatcherStatus.Stopping)
{
throw new InvalidOperationException("Watcher is still stopping");
}
// following Windows API by setting Started status immediately
status = AdvertisementWatcherStatus.Started;
stopError = AdvertisementWatcherError.None;
StartAsync().ContinueWith(t => {
if (t.Status != TaskStatus.RanToCompletion)
{
status = AdvertisementWatcherStatus.Aborted;
// TODO: more specific errors based on exception
stopError = AdvertisementWatcherError.Unknown;
Stop();
}
});
}
void _Stop()
{
if (status != AdvertisementWatcherStatus.Started)
{
throw new InvalidOperationException("Watcher is not running");
}
status = AdvertisementWatcherStatus.Stopping;
StopAsync().ContinueWith(t => {
if (t.IsCompleted)
{
status = AdvertisementWatcherStatus.Stopped;
Stopped?.Invoke(this, new AdvertisementWatcherStoppedEventArgs(stopError));
}
});
}
