class/corlib/System.Threading.Tasks/Internal/SchedulerProxy.cs

   1 #if NET_4_0 || BOOTSTRAP_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