mcs/class/corlib/System.Threading.Tasks/TaskManager.cs

   1 #if NET_4_0
   2 // TaskManager.cs
   3 //
   4 // Copyright (c) 2008 Jérémie "Garuma" Laval
   5 //
   6 // Permission is hereby granted, free of charge, to any person obtaining a copy
   7 // of this software and associated documentation files (the "Software"), to deal
   8 // in the Software without restriction, including without limitation the rights
   9 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 // copies of the Software, and to permit persons to whom the Software is
  11 // furnished to do so, subject to the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be included in
  14 // all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 // THE SOFTWARE.
  23 //
  24 //
  25
  26 using System;
  27 using System.Collections.Generic;
  28
  29 namespace System.Threading.Tasks
  30 {
  31         public class TaskManager: IDisposable
  32         {
  33                 static TaskManager tdefault = new TaskManager();
  34                 static TaskManager tcurrent = tdefault;
  35
  36                 TaskManagerPolicy policy;
  37
  38                 IScheduler        sched;
  39
  40                 public TaskManager(): this(new TaskManagerPolicy())
  41                 {
  42                 }
  43
  44                 public TaskManager(TaskManagerPolicy policy):
  45                         this(policy, new Scheduler(policy.IdealProcessors * policy.IdealThreadsPerProcessor,
  46                                                    policy.MaxStackSize, policy.ThreadPriority))
  47                 {
  48                 }
  49
  50                 internal TaskManager(TaskManagerPolicy policy, IScheduler sched)
  51                 {
  52                         this.policy = policy;
  53                         this.sched = sched;
  54                 }
  55
  56                 ~TaskManager()
  57                 {
  58                         Dispose(false);
  59                 }
  60
  61                 public void Dispose()
  62                 {
  63                         Dispose(true);
  64                 }
  65
  66                 protected virtual void Dispose(bool managedRes)
  67                 {
  68                         if (managedRes)
  69                                 sched.Dispose();
  70                 }
  71
  72                 internal void AddWork(Task t)
  73                 {
  74                         sched.AddWork(t);
  75                 }
  76
  77                 internal void WaitForTask(Task task)
  78                 {
  79                         sched.ParticipateUntil(task);
  80                 }
  81
  82                 internal bool WaitForTaskWithPredicate(Task task, Func<bool> predicate)
  83                 {
  84                         return sched.ParticipateUntil(task, predicate);
  85                 }
  86
  87                 internal void WaitForTasksUntil(Func<bool> predicate)
  88                 {
  89                         sched.ParticipateUntil(predicate);
  90                 }
  91
  92                 public TaskManagerPolicy Policy {
  93                         get {
  94                                 return policy;
  95                         }
  96                 }
  97
  98                 public static TaskManager Default {
  99                         get {
 100                                 return tdefault;
 101                         }
 102                 }
 103
 104                 public static TaskManager Current {
 105                         get {
 106                                 return tcurrent;
 107                         }
 108                         set {
 109                                 if (value != null)
 110                                         tcurrent = value;
 111                         }
 112                 }
 113
 114                 // May be used if we want to feed a big bunch of Tasks without waking up Workers
 115                 /*internal bool IsInhibited {
 116                         set {
 117                                 if (value)
 118                                         sched.InhibitPulse();
 119                                 else {
 120                                         sched.UnInhibitPulse();
 121                                         sched.PulseAll();
 122                                 }
 123                         }
 124                 }*/
 125         }
 126 }
 127 #endif