Since MOBILE implies NET_4_* now, take this into account and simplify our ifdefs.
[mono.git] / mcs / class / corlib / System.Threading.Tasks / ParallelLoopState.cs
1 // ParallelState.cs
2 //
3 // Copyright (c) 2008 Jérémie "Garuma" Laval
4 //
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:
11 //
12 // The above copyright notice and this permission notice shall be included in
13 // all copies or substantial portions of the Software.
14 //
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,
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21 // THE SOFTWARE.
22 //
23 //
24
25 #if NET_4_0
26 using System;
27 using System.Threading;
28
29 namespace System.Threading.Tasks
30 {
31         [System.Diagnostics.DebuggerDisplayAttribute ("ShouldExitCurrentIteration = {ShouldExitCurrentIteration}")]
32         public class ParallelLoopState
33         {
34                 internal class ExternalInfos
35                 {
36                         public bool IsStopped;
37                         public AtomicBooleanValue IsBroken = new AtomicBooleanValue ();
38                         public volatile bool IsExceptional;
39                         public long? LowestBreakIteration;
40                 }
41                 
42                 ExternalInfos extInfos;
43                 
44                 internal ParallelLoopState (ExternalInfos extInfos)
45                 {
46                         this.extInfos = extInfos;
47                 }
48                 
49                 public bool IsStopped {
50                         get {
51                                 return extInfos.IsStopped;
52                         }
53                 }
54                 
55                 public bool IsExceptional {
56                         get {
57                                 return extInfos.IsExceptional;
58                         }
59                 }
60                 
61                 public long? LowestBreakIteration {
62                         get {
63                                 return extInfos.LowestBreakIteration;
64                         }
65                 }
66                 
67                 internal int CurrentIteration {
68                         get;
69                         set;
70                 }
71                 
72                 public bool ShouldExitCurrentIteration {
73                         get {
74                                 return IsExceptional || IsStopped;
75                         }
76                 }
77                 
78                 public void Break ()
79                 {
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.");
82
83                         bool result = extInfos.IsBroken.Exchange (true);
84                         if (!result)
85                                 extInfos.LowestBreakIteration = CurrentIteration;
86                 }
87                 
88                 public void Stop ()
89                 {
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;
93                 }
94         }
95         
96 }
97 #endif