async Task Worker()
{
for (; ; )
{
WorkHandle work;
lock (_lock)
{
if (_workQueue.Count < 1)
return;
work = _workQueue.Dequeue();
}
#if DEBUG
_work = work;
#endif
try
{
work.TryDeregister();
await work.RunAsync().ConfigureAwait(false);
}
catch (Exception ex)
{
Debug.WriteLine("AsyncFifoWorker.Worker() failed: " + ex.ExtendedMessage());
}
#if DEBUG
_work = null;
#endif
work.Dispose();
}
}
WorkHandle PostWork(Func<Task> workFunc, bool createTcs, string description, CancellationToken cancellationToken)
{
if (workFunc == null)
throw new ArgumentNullException(nameof(workFunc));
cancellationToken.ThrowIfCancellationRequested();
WorkHandle work;
lock (_lock)
{
if (_isClosed)
throw new InvalidOperationException("AsyncFifoWorker is closed");
work = new WorkHandle(workFunc, createTcs ? new TaskCompletionSource<object>() : null);
#if DEBUG
work.Description = description;
#endif
_workQueue.Enqueue(work);
}
if (!work.Register(RemoveWork, cancellationToken))
{
Debug.WriteLine("AsyncFifoWorker.PostWork() work already done");
return work;
}
try
{
_signalTask.Fire();
}
catch (ObjectDisposedException)
{
RemoveWork(work);
if (_workQueue.Count > 0)
Debug.WriteLine("AsyncFifoWorker.Post() object disposed but there are still {0} pending", _workQueue.Count);
throw;
}
return work;
}
