annotate Implab.Diagnostics.Interactive/InteractiveListener.cs @ 53:104ce3fe5c46

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author cin
date Mon, 19 May 2014 18:26:58 +0400
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children 790e8a997d30
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1 using Implab.Parallels;
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2 using System;
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3 using System.Collections.Generic;
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4 using System.Linq;
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5 using System.Text;
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6 using System.Threading;
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7 using System.Threading.Tasks;
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8 using System.Windows.Forms;
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9
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10 namespace Implab.Diagnostics.Interactive
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11 {
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12 public class InteractiveListener: TextListenerBase
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13 {
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14 TraceForm m_form;
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16 SynchronizationContext m_syncGuiThread;
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17 readonly Promise<object> m_guiStarted = new Promise<object>();
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19 readonly IPromiseBase m_guiFinished;
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20 readonly IPromiseBase m_workerFinished = new Promise<object>();
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21
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22 readonly MTQueue<TraceViewItem> m_queue = new MTQueue<TraceViewItem>();
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23 readonly AutoResetEvent m_queueEvent = new AutoResetEvent(false);
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25 int m_queueLength;
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26 bool m_exitPending;
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28 readonly object m_pauseLock = new object();
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29 bool m_paused;
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30 readonly ManualResetEvent m_pauseEvent = new ManualResetEvent(true);
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31
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32 public InteractiveListener(bool global) : base(global) {
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33 m_guiFinished = AsyncPool.InvokeNewThread(GuiThread);
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34 m_workerFinished = AsyncPool.InvokeNewThread(QueueThread);
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36 m_guiStarted.Join();
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37 }
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38
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39 void GuiThread() {
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40 m_form = new TraceForm(); // will create SynchronizationContext
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41
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42 m_form.PauseEvents += (s,a) => Pause();
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43 m_form.ResumeEvents += (s, a) => Resume();
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44
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45 m_syncGuiThread = SynchronizationContext.Current;
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46 m_guiStarted.Resolve();
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47 Application.Run();
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48 }
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49
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50 void QueueThread() {
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51 while (!m_exitPending) {
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52 if (m_paused)
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53 m_pauseEvent.WaitOne();
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54
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55 TraceViewItem item;
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56 if (m_queue.TryDequeue(out item)) {
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57 Interlocked.Decrement(ref m_queueLength);
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58
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59 m_syncGuiThread.Send(x => m_form.AddTraceEvent(item),null);
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60 } else {
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61 m_queueEvent.WaitOne();
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62 }
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63 }
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64 }
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65
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66 public void Pause() {
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67 // for consistency we need to set this properties atomically
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68 lock (m_pauseLock) {
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69 m_pauseEvent.Reset();
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70 m_paused = true;
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71 }
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72 }
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74 public void Resume() {
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75 // for consistency we need to set this properties atomically
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76 lock (m_pauseLock) {
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77 m_paused = false;
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78 m_pauseEvent.Set();
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79 }
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80 }
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81
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82 void Enqueue(TraceViewItem item) {
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83 m_queue.Enqueue(item);
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84 if (Interlocked.Increment(ref m_queueLength) == 1)
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85 m_queueEvent.Set();
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86 }
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87
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88 public void ShowForm() {
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89 m_syncGuiThread.Post(x => m_form.Show(), null);
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90 }
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91
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92 public void HideForm() {
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93 m_syncGuiThread.Post(x => m_form.Hide(), null);
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94 }
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96 void Terminate() {
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97 m_exitPending = true;
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98 Resume();
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99 m_syncGuiThread.Post(x => Application.ExitThread(), null);
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100 }
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101
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102 protected override void Dispose(bool disposing) {
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103 if (disposing) {
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104 Terminate();
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105 m_guiFinished.Join();
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106 }
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107 base.Dispose(disposing);
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108 }
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110 protected override void WriteEntry(TraceContext context, EventText text, string channel) {
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111 var item = new TraceViewItem {
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112 Indent = text.indent,
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113 Message = text.content,
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114 Thread = context.ThreadId,
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115 Channel = channel,
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116 Timestamp = Environment.TickCount
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117 };
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118
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119 Enqueue(item);
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120 }
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121 }
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122 }