In class/corlib/:
[mono.git] / mcs / class / corlib / System.Threading.Tasks / Internal / SchedulerProxy.cs
1 #if NET_4_0
2 // 
3 // SchedulerProxy.cs
4 //  
5 // Author:
6 //       Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
7 // 
8 // Copyright (c) 2009 Jérémie "Garuma" Laval
9 // 
10 // Permission is hereby granted, free of charge, to any person obtaining a copy
11 // of this software and associated documentation files (the "Software"), to deal
12 // in the Software without restriction, including without limitation the rights
13 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 // copies of the Software, and to permit persons to whom the Software is
15 // furnished to do so, subject to the following conditions:
16 // 
17 // The above copyright notice and this permission notice shall be included in
18 // all copies or substantial portions of the Software.
19 // 
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 // THE SOFTWARE.
27
28 using System;
29
30 namespace System.Threading.Tasks
31 {
32         
33         internal class SchedulerProxy : IScheduler
34         {
35                 TaskScheduler scheduler;
36                 
37                 public SchedulerProxy (TaskScheduler scheduler)
38                 {
39                         this.scheduler = scheduler;
40                 }
41                 
42                 #region IScheduler implementation
43                 public void AddWork (Task t)
44                 {
45                         scheduler.QueueTask (t);
46                 }
47                 
48                 public void ParticipateUntil (Task task)
49                 {
50                         ParticipateUntil (() => task.IsCompleted);
51                 }
52                 
53                 public bool ParticipateUntil (Task task, Func<bool> predicate)
54                 {
55                         bool fromPredicate = false;
56                         
57                         ParticipateUntil (() => {
58                                 if (predicate ()) {
59                                         fromPredicate = true;
60                                         return true;
61                                 }
62                                 
63                                 return task.IsCompleted;
64                         });
65                         
66                         return fromPredicate;
67                 }
68                 
69                 public void ParticipateUntil (Func<bool> predicate)
70                 {
71                         SpinWait sw = new SpinWait ();
72                         
73                         while (!predicate ())
74                                 sw.SpinOnce ();
75                 }
76                 
77                 public void PulseAll ()
78                 {
79                         
80                 }
81                 #endregion
82
83                 #region IDisposable implementation
84                 public void Dispose ()
85                 {
86                         scheduler = null;
87                 }
88                 #endregion
89
90         }
91 }
92 #endif