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| const int maxBuffer = 1024; | |
| var nagle = new NagleAwaitable(TimeSpan.FromMilliseconds(1)); | |
| while (true) | |
| { | |
| var result = await application.Output.ReadAsync(); | |
| var buffer = result.Buffer; | |
| // Check if we have enough to perform a write | |
| if (buffer.Length >= maxBuffer) | |
| { | |
| await WriteAsync(buffer); | |
| } | |
| else | |
| { | |
| while (buffer.Length < maxBuffer) | |
| { | |
| var length = buffer.Length; | |
| // If we're under, we want to start buffering, act like we consumed | |
| // nothing but looked at everything so we can wait for more data | |
| application.Output.AdvanceTo(buffer.Start, buffer.End); | |
| // Dispatch to the thread pool to inject some latency (this *could* be another queue) | |
| await nagle; | |
| // TryRead should *always* return true since we know we have something to write | |
| var hasData = application.Output.TryRead(out result); | |
| buffer = result.Buffer; | |
| Debug.Assert(hasData, "We should have data buffered"); | |
| if (buffer.Length == length) | |
| { | |
| // We didn't get more data so write what we have | |
| break; | |
| } | |
| } | |
| await WriteAsync(buffer); | |
| } | |
| application.Output.AdvanceTo(buffer.End); | |
| } |
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| public class NagleAwaitable : ICriticalNotifyCompletion | |
| { | |
| private readonly ConcurrentQueue<Action> _work = new ConcurrentQueue<Action>(); | |
| private readonly TimerAwaitable _timerAwaitable; | |
| private bool _timerResult; | |
| public NagleAwaitable(TimeSpan period) | |
| { | |
| _timerAwaitable = new TimerAwaitable(period, period); | |
| _timerAwaitable.OnCompleted(FireCallbacks); | |
| _timerAwaitable.Start(); | |
| } | |
| public NagleAwaitable GetAwaiter() => this; | |
| public bool GetResult() | |
| { | |
| return _timerResult; | |
| } | |
| public bool IsCompleted => _timerAwaitable.IsCompleted; | |
| public void OnCompleted(Action continuation) | |
| { | |
| _work.Enqueue(continuation); | |
| } | |
| public void UnsafeOnCompleted(Action continuation) | |
| { | |
| OnCompleted(continuation); | |
| } | |
| public void FireCallbacks() | |
| { | |
| _timerResult = _timerAwaitable.GetResult(); | |
| while (_work.TryDequeue(out var action)) | |
| { | |
| Task.Run(action); | |
| } | |
| _timerAwaitable.OnCompleted(FireCallbacks); | |
| } | |
| } |
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