3 // Copyright (c) 2008 Jérémie "Garuma" Laval
5 // Permission is hereby granted, free of charge, to any person obtaining a copy
6 // of this software and associated documentation files (the "Software"), to deal
7 // in the Software without restriction, including without limitation the rights
8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 // copies of the Software, and to permit persons to whom the Software is
10 // furnished to do so, subject to the following conditions:
12 // The above copyright notice and this permission notice shall be included in
13 // all copies or substantial portions of the Software.
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 using System.Threading;
29 namespace System.Threading.Tasks
31 [System.Diagnostics.DebuggerDisplayAttribute ("ShouldExitCurrentIteration = {ShouldExitCurrentIteration}")]
32 public class ParallelLoopState
34 internal class ExternalInfos
36 public bool IsStopped;
37 public AtomicBooleanValue IsBroken = new AtomicBooleanValue ();
38 public volatile bool IsExceptional;
39 public long? LowestBreakIteration;
42 ExternalInfos extInfos;
44 internal ParallelLoopState (ExternalInfos extInfos)
46 this.extInfos = extInfos;
49 public bool IsStopped {
51 return extInfos.IsStopped;
55 public bool IsExceptional {
57 return extInfos.IsExceptional;
61 public long? LowestBreakIteration {
63 return extInfos.LowestBreakIteration;
67 internal int CurrentIteration {
72 public bool ShouldExitCurrentIteration {
74 return IsExceptional || IsStopped;
80 if (extInfos.IsStopped)
81 throw new InvalidOperationException ("The Stop method was previously called. Break and Stop may not be used in combination by iterations of the same loop.");
83 bool result = extInfos.IsBroken.Exchange (true);
85 extInfos.LowestBreakIteration = CurrentIteration;
90 if (extInfos.IsBroken.Value)
91 throw new InvalidOperationException ("The Break method was previously called. Break and Stop may not be used in combination by iterations of the same loop.");
92 extInfos.IsStopped = true;