47 lines
1.4 KiB
C#
47 lines
1.4 KiB
C#
using System;
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using System.Threading;
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using System.Threading.Tasks;
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namespace SimpleTimerPortable
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{
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internal delegate void TimerCallback(object state);
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internal sealed class Timer : CancellationTokenSource, IDisposable
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{
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public Timer(TimerCallback callback, object state, TimeSpan dueTime, TimeSpan period)
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{
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this.callback = callback;
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this.state = state;
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start(dueTime, period);
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}
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private TimerCallback callback;
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private object state;
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private void start(TimeSpan dueTime, TimeSpan period)
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{
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Task.Delay(dueTime, Token).ContinueWith(async (t, s) =>
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{
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var tuple = (Tuple<TimerCallback, object>)s;
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while (true)
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{
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if (IsCancellationRequested)
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break;
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await Task.Run(() => tuple.Item1(tuple.Item2));
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await Task.Delay(period);
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}
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}, Tuple.Create(callback, state), CancellationToken.None,
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TaskContinuationOptions.ExecuteSynchronously | TaskContinuationOptions.OnlyOnRanToCompletion,
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TaskScheduler.Default);
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}
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public new void Dispose() { base.Cancel(); }
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public void Change(TimeSpan dueTime, TimeSpan period)
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{
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Cancel();
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start(dueTime, period);
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}
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}
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}
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