TaskConstants_T.cs
Go to the documentation of this file.
1 //
2 // TaskConstants_T.cs
3 //
4 // Authors:
5 // Jérémie Laval <jeremie dot laval at xamarin dot com>
6 //
7 // Copyright 2011 Xamarin Inc.
8 //
9 // Permission is hereby granted, free of charge, to any person obtaining a copy
10 // of this software and associated documentation files (the "Software"), to deal
11 // in the Software without restriction, including without limitation the rights
12 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 // copies of the Software, and to permit persons to whom the Software is
14 // furnished to do so, subject to the following conditions:
15 //
16 // The above copyright notice and this permission notice shall be included in
17 // all copies or substantial portions of the Software.
18 //
19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 // THE SOFTWARE.
26 //
27 //
28 
29 #if NET_4_5
30 using System;
32 
33 namespace System.Threading.Tasks
34 {
35  internal class TaskConstants<T>
36  {
37  internal static readonly Task<T> Canceled;
38 
39  static TaskConstants ()
40  {
41  var tcs = new TaskCompletionSource<T> ();
42  tcs.SetCanceled ();
43  Canceled = tcs.Task;
44  }
45  }
46 }
47 
48 #endif
The fiber acknowledged cancellation by throwing an OperationCanceledException with its own Cancellati...