annotate Implab.Fx/StaApartment.cs @ 225:8222a2ab3ab7 v2

JSONXmlReaderFixed fixed boolean values handling
author cin
date Wed, 23 Aug 2017 02:38:02 +0300
parents 3eb3255d8cc5
children cbe10ac0731e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 using Implab.Components;
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2 using Implab.Diagnostics;
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3 using Implab.Parallels;
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4 using System;
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5 using System.Collections.Generic;
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6 using System.Linq;
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7 using System.Text;
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8 using System.Threading;
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9 using System.Threading.Tasks;
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10 using System.Windows.Forms;
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11
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12 namespace Implab.Fx {
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13 public class StaApartment : RunnableComponent {
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14 readonly Thread m_worker;
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15 SynchronizationContext m_syncContext;
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16 SyncContextPromise m_enterPromise;
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17
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18 readonly Promise m_threadStarted;
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19 readonly Promise m_threadTerminated;
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20
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21 public StaApartment() : base(true) {
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22 m_threadStarted = new Promise();
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23 m_threadTerminated = new Promise();
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24
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25 m_worker = new Thread(WorkerEntry);
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26 m_worker.SetApartmentState(ApartmentState.STA);
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27 m_worker.IsBackground = true;
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28 m_worker.Name = "STA managed aparment";
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29 }
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30
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31 public SynchronizationContext SyncContext {
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32 get {
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33 if (m_syncContext == null)
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34 throw new InvalidOperationException();
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35 return m_syncContext;
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36 }
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37 }
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38
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39 /// <summary>
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40 /// Returns the promise which will dispatch all handlers inside the apartment using it's <see cref="SynchronizationContext"/>
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41 /// </summary>
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42 /// <remarks>
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43 /// Current implementation is optimized and will lost aync operation stack
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44 /// </remarks>
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45 /// <returns>The promise</returns>
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46 public IPromise Enter() {
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47 if (m_enterPromise == null)
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48 throw new InvalidOperationException();
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49 return m_enterPromise;
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50 }
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51
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52 public IPromise Invoke(Action<ICancellationToken> action) {
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53 Safe.ArgumentNotNull(action, "action");
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54
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55 if (m_syncContext == null)
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56 throw new InvalidOperationException();
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57 var p = new Promise();
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58 var lop = TraceContext.Instance.CurrentOperation;
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59
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60 m_syncContext.Post(x => {
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61 TraceContext.Instance.EnterLogicalOperation(lop, false);
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62 try {
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63 if (p.CancelOperationIfRequested())
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64 return;
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65
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66 action(p);
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67 p.Resolve();
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68 } catch (Exception e) {
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69 p.Reject(e);
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70 } finally {
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71 TraceContext.Instance.Leave();
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72 }
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73 }, null);
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74
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75 return p;
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76 }
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77
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78 public IPromise<T> Invoke<T>(Func<ICancellationToken, T> action) {
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79 Safe.ArgumentNotNull(action, "action");
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80
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81 if (m_syncContext == null)
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82 throw new InvalidOperationException();
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83 var p = new Promise<T>();
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84 var lop = TraceContext.Instance.CurrentOperation;
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85
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86 m_syncContext.Post(x => {
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87 TraceContext.Instance.EnterLogicalOperation(lop, false);
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88 try {
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89 if (p.CancelOperationIfRequested())
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90 return;
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91 p.Resolve(action(p));
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92 } catch (Exception e) {
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93 p.Reject(e);
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94 } finally {
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95 TraceContext.Instance.Leave();
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96 }
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97 }, null);
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98
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99 return p;
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100 }
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101
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102 public IPromise Invoke(Action action) {
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103 Safe.ArgumentNotNull(action, "action");
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104
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105 if (m_syncContext == null)
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106 throw new InvalidOperationException();
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107 var p = new Promise();
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108 var lop = TraceContext.Instance.CurrentOperation;
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109
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110 m_syncContext.Post(x => {
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111 TraceContext.Instance.EnterLogicalOperation(lop, false);
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112 try {
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113 if (p.CancelOperationIfRequested())
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114 return;
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115 action();
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116 p.Resolve();
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117 } catch (Exception e) {
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118 p.Reject(e);
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119 } finally {
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120 TraceContext.Instance.Leave();
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121 }
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122 }, null);
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123
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124 return p;
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125 }
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126
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127 public IPromise<T> Invoke<T>(Func<T> action) {
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128 Safe.ArgumentNotNull(action, "action");
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129
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130 if (m_syncContext == null)
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131 throw new InvalidOperationException();
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132 var p = new Promise<T>();
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133 var lop = TraceContext.Instance.CurrentOperation;
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134
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135 m_syncContext.Post(x => {
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136 TraceContext.Instance.EnterLogicalOperation(lop, false);
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137 try {
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138 if (p.CancelOperationIfRequested())
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139 return;
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140 p.Resolve(action());
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141 } catch (Exception e) {
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142 p.Reject(e);
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143 } finally {
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144 TraceContext.Instance.Leave();
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145 }
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146 }, null);
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147
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148 return p;
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149 }
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150
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151
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152 /// <summary>
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153 /// Starts the apartment thread
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154 /// </summary>
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155 /// <returns>Promise which will be fullfiled when the syncronization
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156 /// context will be ready to accept tasks.</returns>
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157 protected override IPromise OnStart() {
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158 m_worker.Start();
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159 return m_threadStarted;
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160 }
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161
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162 /// <summary>
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163 /// Posts quit message to the message loop of the apartment
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164 /// </summary>
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165 /// <returns>Promise</returns>
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166 protected override IPromise OnStop() {
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167 m_syncContext.Post(x => Application.ExitThread(), null);
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168 return m_threadTerminated;
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169 }
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170
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171 void WorkerEntry() {
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172 m_syncContext = new WindowsFormsSynchronizationContext();
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173 SynchronizationContext.SetSynchronizationContext(m_syncContext);
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174 m_enterPromise = new SyncContextPromise(m_syncContext);
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175 m_threadStarted.Resolve();
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176 m_enterPromise.Resolve();
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177
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178 Application.OleRequired();
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179 Application.Run();
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180
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181 try {
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182 OnShutdown();
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183 m_threadTerminated.Resolve();
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184 } catch(Exception err) {
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185 m_threadTerminated.Reject(err);
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186 }
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187 }
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188
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189 /// <summary>
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190 /// Called from the STA apartment after the message loop is terminated, override this
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191 /// method to handle apartment cleanup.
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192 /// </summary>
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193 protected virtual void OnShutdown() {
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194 }
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195
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196 protected override void Dispose(bool disposing) {
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197 if (disposing) {
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198 if (!m_threadTerminated.IsResolved)
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199 m_syncContext.Post(x => Application.ExitThread(), null);
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200 }
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201 base.Dispose(disposing);
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202 }
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203 }
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204 }