2 // ConfiguredTaskAwaitable_T.cs
5 // Marek Safar <marek.safar@gmail.com>
7 // Copyright (C) 2011 Xamarin, Inc (http://www.xamarin.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
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14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
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31 using System.Threading.Tasks;
33 namespace System.Runtime.CompilerServices
35 public struct ConfiguredTaskAwaitable<TResult>
37 public struct ConfiguredTaskAwaiter
39 readonly Task<TResult> task;
40 readonly bool continueOnSourceContext;
42 internal ConfiguredTaskAwaiter (Task<TResult> task, bool continueOnSourceContext)
45 this.continueOnSourceContext = continueOnSourceContext;
48 public bool IsCompleted {
50 return task.IsCompleted;
54 public TResult GetResult ()
56 if (task.Status != TaskStatus.RanToCompletion)
57 throw TaskAwaiter.HandleUnexpectedTaskResult (task);
62 public void OnCompleted (Action continuation)
64 if (continuation == null)
65 throw new ArgumentNullException ("continuation");
67 TaskAwaiter.HandleOnCompleted (task, continuation, continueOnSourceContext);
71 readonly ConfiguredTaskAwaiter awaiter;
73 internal ConfiguredTaskAwaitable (Task<TResult> task, bool continueOnSourceContext)
75 awaiter = new ConfiguredTaskAwaiter (task, continueOnSourceContext);
78 public ConfiguredTaskAwaiter GetAwaiter()