| | | 1 | | // Licensed to the .NET Foundation under one or more agreements. |
| | | 2 | | // The .NET Foundation licenses this file to you under the MIT license. |
| | | 3 | | |
| | | 4 | | using System; |
| | | 5 | | using System.Collections.Generic; |
| | | 6 | | using System.Diagnostics; |
| | | 7 | | using System.Text; |
| | | 8 | | using System.Threading; |
| | | 9 | | using CoreWCF; |
| | | 10 | | |
| | | 11 | | namespace CoreWCF.Runtime |
| | | 12 | | { |
| | | 13 | | internal class RecoverableTimeoutCancellationTokenSource : CancellationTokenSource |
| | | 14 | | { |
| | | 15 | | private TimeSpan _originalTimeout; |
| | | 16 | | |
| | | 17 | | public RecoverableTimeoutCancellationTokenSource(TimeSpan timeout) : base() |
| | | 18 | | { |
| | | 19 | | if (timeout.TotalMilliseconds > int.MaxValue) |
| | | 20 | | { |
| | | 21 | | throw new ArgumentOutOfRangeException(nameof(timeout), $"Only TimeSpan's representing up to {int.MaxValu |
| | | 22 | | } |
| | | 23 | | |
| | | 24 | | _originalTimeout = timeout; |
| | | 25 | | } |
| | | 26 | | |
| | | 27 | | public RecoverableTimeoutCancellationTokenSource(int millisecondsDelay) |
| | | 28 | | { |
| | | 29 | | if (millisecondsDelay == Timeout.Infinite) |
| | | 30 | | { |
| | | 31 | | _originalTimeout = Timeout.InfiniteTimeSpan; |
| | | 32 | | } |
| | | 33 | | else |
| | | 34 | | { |
| | | 35 | | _originalTimeout = TimeSpan.FromMilliseconds(millisecondsDelay); |
| | | 36 | | } |
| | | 37 | | } |
| | | 38 | | |
| | | 39 | | public override int GetHashCode() |
| | | 40 | | { |
| | | 41 | | return (int)_originalTimeout.TotalMilliseconds; |
| | | 42 | | } |
| | | 43 | | |
| | | 44 | | internal static TimeSpan GetOriginalTimeout(CancellationToken token) |
| | | 45 | | { |
| | | 46 | | // Covers CancellationToken.None as well as any other non-cancellable token |
| | | 47 | | if (!token.CanBeCanceled) |
| | | 48 | | { |
| | | 49 | | return Timeout.InfiniteTimeSpan; |
| | | 50 | | } |
| | | 51 | | |
| | | 52 | | return TimeSpan.FromMilliseconds(token.GetHashCode()); |
| | | 53 | | } |
| | | 54 | | } |
| | | 55 | | |
| | | 56 | | internal class CancellationTokenSourceIOThreadTimer : IOThreadTimer |
| | | 57 | | { |
| | 0 | 58 | | private readonly List<CancellationTokenSource> _cancellationTokenSources = new List<CancellationTokenSource>(); |
| | | 59 | | private bool _timerFired = false; |
| | | 60 | | private Action<object> _timerFiredCallback; |
| | | 61 | | private object _timerFiredState; |
| | | 62 | | |
| | 0 | 63 | | public CancellationTokenSourceIOThreadTimer() : base(TimerCallback, null, false) |
| | | 64 | | { |
| | 0 | 65 | | Reinitialize(TimerCallback, this); |
| | 0 | 66 | | } |
| | | 67 | | |
| | | 68 | | public void SetCompletionCallback(Action<object> callback, object state) |
| | | 69 | | { |
| | 0 | 70 | | _timerFiredCallback = Fx.ThunkCallback(callback); |
| | 0 | 71 | | _timerFiredState = state; |
| | 0 | 72 | | } |
| | | 73 | | |
| | | 74 | | public void RegisterTokenSourceForCancellation(CancellationTokenSource cts) |
| | | 75 | | { |
| | | 76 | | // TODO: Consider if unregistering would be helpful. It would require |
| | | 77 | | // knowing that the CancellationToken is no longer needed. |
| | 0 | 78 | | lock (_cancellationTokenSources) |
| | | 79 | | { |
| | 0 | 80 | | if (!_timerFired) |
| | | 81 | | { |
| | 0 | 82 | | _cancellationTokenSources.Add(cts); |
| | 0 | 83 | | return; |
| | | 84 | | } |
| | 0 | 85 | | } |
| | | 86 | | |
| | | 87 | | // Timer has already fired so cancelling now. |
| | 0 | 88 | | CancelTokenSource(cts); |
| | 0 | 89 | | } |
| | | 90 | | |
| | | 91 | | internal static void CancelTokenSource(object state) |
| | | 92 | | { |
| | 0 | 93 | | var cts = (CancellationTokenSource)state; |
| | | 94 | | try |
| | | 95 | | { |
| | | 96 | | // Ensure all callbacks are fired |
| | 0 | 97 | | cts.Cancel(throwOnFirstException: false); |
| | 0 | 98 | | cts.Dispose(); |
| | 0 | 99 | | } |
| | | 100 | | catch (Exception e) |
| | | 101 | | { |
| | 0 | 102 | | if (Fx.IsFatal(e)) |
| | | 103 | | { |
| | 0 | 104 | | throw; |
| | | 105 | | } |
| | | 106 | | // Callbacks shouldn't be throwing |
| | 0 | 107 | | DiagnosticUtility.TraceHandledException(e, TraceEventType.Error); |
| | 0 | 108 | | } |
| | 0 | 109 | | } |
| | | 110 | | |
| | | 111 | | internal void OnTimer() |
| | | 112 | | { |
| | 0 | 113 | | _timerFiredCallback(_timerFiredState); |
| | | 114 | | |
| | 0 | 115 | | lock (_cancellationTokenSources) |
| | | 116 | | { |
| | 0 | 117 | | _timerFired = true; |
| | 0 | 118 | | } |
| | | 119 | | // Once _timerFired is set, there's no need to hold the lock as |
| | | 120 | | // no more will be added to the list. |
| | 0 | 121 | | foreach (CancellationTokenSource cts in _cancellationTokenSources) |
| | | 122 | | { |
| | | 123 | | // TODO: ActionItem.Schedule might be overkill here as I don't expect there |
| | | 124 | | // to be many cancellations. There's just no |
| | 0 | 125 | | if (!cts.IsCancellationRequested) |
| | | 126 | | { |
| | 0 | 127 | | ActionItem.Schedule(CancelTokenSource, cts); |
| | | 128 | | } |
| | | 129 | | } |
| | 0 | 130 | | } |
| | | 131 | | |
| | | 132 | | internal static void TimerCallback(object state) |
| | | 133 | | { |
| | 0 | 134 | | var thisPtr = (CancellationTokenSourceIOThreadTimer)state; |
| | 0 | 135 | | thisPtr.OnTimer(); |
| | 0 | 136 | | } |
| | | 137 | | } |
| | | 138 | | } |