96 lines
2.8 KiB
C#
96 lines
2.8 KiB
C#
//
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// ConfiguredTaskAwaitable.cs
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//
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// Authors:
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// Marek Safar <marek.safar@gmail.com>
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//
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// Copyright (C) 2011 Xamarin, Inc (http://www.xamarin.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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#if NET_4_5
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using System.Threading;
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using System.Threading.Tasks;
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using System.Runtime.ExceptionServices;
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namespace System.Runtime.CompilerServices
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{
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public struct ConfiguredTaskAwaitable
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{
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public struct ConfiguredTaskAwaiter : ICriticalNotifyCompletion
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{
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readonly Task task;
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readonly bool continueOnSourceContext;
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internal ConfiguredTaskAwaiter (Task task, bool continueOnSourceContext)
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{
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this.task = task;
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this.continueOnSourceContext = continueOnSourceContext;
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}
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public bool IsCompleted {
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get {
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return task.IsCompleted;
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}
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}
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public void GetResult ()
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{
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if (!task.IsCompleted)
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task.WaitCore (Timeout.Infinite, CancellationToken.None, true);
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if (task.Status != TaskStatus.RanToCompletion)
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ExceptionDispatchInfo.Capture (TaskAwaiter.HandleUnexpectedTaskResult (task)).Throw ();
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}
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public void OnCompleted (Action continuation)
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{
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if (continuation == null)
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throw new ArgumentNullException ("continuation");
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TaskAwaiter.HandleOnCompleted (task, continuation, continueOnSourceContext, true);
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}
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public void UnsafeOnCompleted (Action continuation)
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{
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if (continuation == null)
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throw new ArgumentNullException ("continuation");
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TaskAwaiter.HandleOnCompleted (task, continuation, continueOnSourceContext, false);
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}
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}
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readonly ConfiguredTaskAwaiter awaiter;
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internal ConfiguredTaskAwaitable (Task task, bool continueOnSourceContext)
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{
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awaiter = new ConfiguredTaskAwaiter (task, continueOnSourceContext);
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}
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public ConfiguredTaskAwaiter GetAwaiter()
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{
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return awaiter;
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}
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}
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}
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#endif |