132 lines
3.7 KiB
C#
132 lines
3.7 KiB
C#
//
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// TaskCompletionSource.cs
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//
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// Authors:
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// Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
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// Marek Safar <marek.safar@gmail.com>
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//
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// Copyright (c) 2009 Jérémie "Garuma" Laval
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// Copyright 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 a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// 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, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#if NET_4_0
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using System;
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using System.Collections.Generic;
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namespace System.Threading.Tasks
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{
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public class TaskCompletionSource<TResult>
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{
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readonly Task<TResult> source;
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public TaskCompletionSource ()
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: this (null, TaskCreationOptions.None)
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{
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}
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public TaskCompletionSource (object state)
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: this (state, TaskCreationOptions.None)
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{
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}
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public TaskCompletionSource (TaskCreationOptions creationOptions)
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: this (null, creationOptions)
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{
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}
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public TaskCompletionSource (object state, TaskCreationOptions creationOptions)
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{
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if ((creationOptions & System.Threading.Tasks.Task.WorkerTaskNotSupportedOptions) != 0)
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throw new ArgumentOutOfRangeException ("creationOptions");
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source = new Task<TResult> (TaskActionInvoker.Empty, state, CancellationToken.None, creationOptions, null);
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source.SetupScheduler (TaskScheduler.Current);
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}
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public void SetCanceled ()
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{
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if (!TrySetCanceled ())
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ThrowInvalidException ();
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}
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public void SetException (Exception exception)
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{
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if (exception == null)
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throw new ArgumentNullException ("exception");
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SetException (new Exception[] { exception });
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}
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public void SetException (IEnumerable<Exception> exceptions)
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{
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if (!TrySetException (exceptions))
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ThrowInvalidException ();
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}
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public void SetResult (TResult result)
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{
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if (!TrySetResult (result))
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ThrowInvalidException ();
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}
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static void ThrowInvalidException ()
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{
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throw new InvalidOperationException ("The underlying Task is already in one of the three final states: RanToCompletion, Faulted, or Canceled.");
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}
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public bool TrySetCanceled ()
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{
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return source.TrySetCanceled ();
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}
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public bool TrySetException (Exception exception)
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{
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if (exception == null)
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throw new ArgumentNullException ("exception");
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return TrySetException (new Exception[] { exception });
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}
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public bool TrySetException (IEnumerable<Exception> exceptions)
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{
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if (exceptions == null)
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throw new ArgumentNullException ("exceptions");
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var aggregate = new AggregateException (exceptions);
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if (aggregate.InnerExceptions.Count == 0)
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throw new ArgumentNullException ("exceptions");
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return source.TrySetException (aggregate, false, false);
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}
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public bool TrySetResult (TResult result)
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{
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return source.TrySetResult (result);
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}
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public Task<TResult> Task {
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get {
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return source;
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}
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}
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}
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}
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#endif
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