1 | using System; |
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2 | using System.Collections.Generic; |
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3 | using System.Linq; |
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4 | using System.Text; |
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5 | using System.Threading; |
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6 | |
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7 | namespace BCMToolbox |
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8 | { |
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9 | /* |
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10 | * Connects Hebbian3 networks with message pipes and handles execution in parallel. |
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11 | */ |
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12 | public abstract class ParallelHebbian3Executive : IDisposable |
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13 | { |
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14 | /// <summary> |
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15 | /// Classes which inherit this build different network configurations. |
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16 | /// </summary> |
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17 | protected abstract SynchronousHebbian3Network BuildNetwork(); |
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18 | |
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19 | int __processorCount = 0; |
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20 | List<SynchronousHebbian3Network> __networks = new List<SynchronousHebbian3Network>(); |
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21 | List<Thread> __executionThreads = new List<Thread>(); |
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22 | bool __started = false; |
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23 | ManualResetEvent __mainSync = new ManualResetEvent(false); |
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24 | int __waiting = 0; |
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25 | object __syncRoot = new object(); |
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26 | |
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27 | public ParallelHebbian3Executive(int newProcessorCount) |
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28 | { |
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29 | __processorCount = newProcessorCount; |
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30 | } |
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31 | |
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32 | public ParallelHebbian3Executive() |
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33 | : this(Environment.ProcessorCount) |
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34 | { |
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35 | } |
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36 | |
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37 | public void Initialize() |
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38 | { |
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39 | for (int i = 0; i < __processorCount; i++) |
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40 | __networks.Add(BuildNetwork()); |
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41 | |
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42 | // bind message-passing pipes |
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43 | for(int i = 0; i < __networks.Count; i++) |
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44 | for (int j = i + 1; j < __networks.Count; j++) |
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45 | { |
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46 | LocalPipe pipe = __networks[i].RegisterOtherNetwork(__networks[j]); |
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47 | __networks[j].LinkPipe(pipe); |
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48 | } |
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49 | |
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50 | // create execution threads |
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51 | for (int i = 0; i < __networks.Count; i++) |
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52 | { |
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53 | Thread th = new Thread( |
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54 | new ParameterizedThreadStart(this.runNetwork)); |
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55 | __executionThreads.Add(th); |
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56 | th.IsBackground = true; |
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57 | } |
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58 | } |
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59 | |
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60 | public object SyncRoot |
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61 | { |
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62 | get |
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63 | { |
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64 | return __syncRoot; |
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65 | } |
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66 | } |
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67 | |
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68 | void runNetwork(object net) |
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69 | { |
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70 | SynchronousHebbian3Network network = net as SynchronousHebbian3Network; |
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71 | while (true) |
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72 | { |
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73 | bool wait = false; |
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74 | network.Propagate(); |
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75 | lock (this) |
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76 | { |
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77 | if (__waiting == (__processorCount - 1)) // all have finished |
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78 | { |
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79 | __waiting = 0; |
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80 | __mainSync.Set(); |
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81 | __mainSync.Reset(); |
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82 | } |
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83 | else |
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84 | { |
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85 | wait = true; |
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86 | __waiting++; |
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87 | } |
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88 | } |
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89 | |
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90 | if (wait) |
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91 | __mainSync.WaitOne(); |
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92 | } |
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93 | } |
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94 | |
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95 | public int Count |
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96 | { |
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97 | get |
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98 | { |
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99 | return __processorCount; |
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100 | } |
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101 | } |
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102 | |
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103 | public void Start() |
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104 | { |
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105 | if (__started) |
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106 | throw new NotSupportedException("Execution has already started."); |
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107 | |
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108 | for (int i = 0; i < __executionThreads.Count; i++) |
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109 | __executionThreads[i].Start(__networks[i]); |
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110 | |
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111 | __started = true; |
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112 | } |
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113 | |
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114 | public void Stop() |
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115 | { |
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116 | if (!__started) |
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117 | return; |
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118 | |
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119 | for (int i = 0; i < __executionThreads.Count; i++) |
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120 | if ((__executionThreads[i].ThreadState == ThreadState.Running) || |
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121 | (__executionThreads[i].ThreadState == ThreadState.WaitSleepJoin)) |
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122 | __executionThreads[i].Abort(); |
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123 | } |
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124 | |
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125 | |
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126 | |
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127 | #region IDisposable Members |
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128 | |
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129 | public void Dispose() |
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130 | { |
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131 | if (__started) |
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132 | Stop(); |
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133 | } |
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134 | |
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135 | #endregion |
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136 | } |
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137 | } |
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