[171] | 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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