public Task AdvanceTo(int position)
{
var flag = new SyncFlag(position);
Interlocked.Exchange(ref _syncFlag, flag)?.Canceled();
if (position == _syncPosition)
{
return(Task.CompletedTask);
}
else if (position < _syncPosition)
{
throw new InvalidOperationException("Thread is already at positon " + _syncPosition);
}
_syncEvent.Set();
return(flag.Wait());
}
public async Task AdvanceAndFreezeBefore(int position)
{
var flag = new SyncFlag(position);
Interlocked.Exchange(ref _syncFlag, flag)?.Canceled();
if (position <= _syncPosition)
{
throw new InvalidOperationException("Thread is already at positon " + _syncPosition);
}
_syncEvent.Set();
var reached = flag.Wait();
var frozen = _current.Frozen();
await Task.WhenAny(reached, frozen);
Assert.AreEqual(TaskStatus.WaitingForActivation, reached.Status);
Assert.AreEqual(TaskStatus.RanToCompletion, frozen.Status);
}