class/corlib/System.Threading.Tasks/ParallelLoopState.cs

   1 #if NET_4_0
   2 // ParallelState.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.Threading;
  28
  29 namespace System.Threading.Tasks
  30 {
  31         public class ParallelLoopState
  32         {
  33                 internal class ExternalInfos
  34                 {
  35                         public AtomicBoolean IsStopped = new AtomicBoolean ();
  36                         public AtomicBoolean IsBroken = new AtomicBoolean ();
  37                         public volatile bool IsExceptional;
  38                         public long? LowestBreakIteration;
  39                 }
  40
  41                 ExternalInfos extInfos;
  42
  43                 internal ParallelLoopState (ExternalInfos extInfos)
  44                 {
  45                         this.extInfos = extInfos;
  46                 }
  47
  48                 public bool IsStopped {
  49                         get {
  50                                 return extInfos.IsStopped.Value;
  51                         }
  52                 }
  53
  54                 public bool IsExceptional {
  55                         get {
  56                                 return extInfos.IsExceptional;
  57                         }
  58                 }
  59
  60                 public long? LowestBreakIteration {
  61                         get {
  62                                 return extInfos.LowestBreakIteration;
  63                         }
  64                 }
  65
  66                 internal int CurrentIteration {
  67                         get;
  68                         set;
  69                 }
  70
  71                 public bool ShouldExitCurrentIteration {
  72                         get {
  73                                 return IsExceptional || IsStopped;
  74                         }
  75                 }
  76
  77                 public void Break ()
  78                 {
  79                         bool result = extInfos.IsBroken.Exchange (true);
  80                         if (!result)
  81                                 extInfos.LowestBreakIteration = CurrentIteration;
  82                 }
  83
  84                 public void Stop ()
  85                 {
  86                         extInfos.IsStopped.Exchange (true);
  87                 }
  88         }
  89
  90 }
  91 #endif