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1 /*******************************************************************************
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2 copyright: Copyright (c) 2006 Juan Jose Comellas. All rights reserved
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3 license: BSD style: $(LICENSE)
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4 author: Juan Jose Comellas <juanjo@comellas.com.ar>
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5 Converted to use core.sync by Sean Kelly <sean@f4.ca>
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6 *******************************************************************************/
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7
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8 private import tango.core.sync.Condition;
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9 private import tango.core.Exception;
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10 private import tango.core.Thread;
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11 private import tango.text.convert.Integer;
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12 private import tango.io.Stdout;
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13 debug (condition)
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14 {
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15 private import tango.util.log.Log;
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16 private import tango.util.log.ConsoleAppender;
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17 private import tango.util.log.DateLayout;
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18 }
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19
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20
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21 void main(char[][] args)
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22 {
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23 debug (condition)
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24 {
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25 Logger log = Log.getLogger("condition");
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26
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27 log.addAppender(new ConsoleAppender(new DateLayout()));
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28
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29 log.info("Condition test");
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30 }
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31
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32 testNotifyOne();
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33 testNotifyAll();
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34 }
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35
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36
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37 /**
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38 * Test for Condition.notify().
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39 */
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40 void testNotifyOne()
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41 {
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42 debug (condition)
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43 {
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44 Logger log = Log.getLogger("condition.notify-one");
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45 }
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46
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47 scope Mutex mutex = new Mutex();
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48 scope Condition cond = new Condition(mutex);
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49 int waiting = 0;
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50 Thread thread;
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51
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52 void notifyOneTestThread()
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53 {
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54 debug (condition)
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55 {
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56 Logger log = Log.getLogger("condition.notify-one." ~ Thread.getThis().name());
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57
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58 log.trace("Starting thread");
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59 }
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60
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61 try
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62 {
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63 synchronized (mutex)
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64 {
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65 debug (condition)
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66 log.trace("Acquired mutex");
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67
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68 scope(exit)
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69 {
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70 debug (condition)
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71 log.trace("Releasing mutex");
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72 }
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73
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74 waiting++;
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75
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76 while (waiting != 2)
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77 {
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78 debug (condition)
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79 log.trace("Waiting on condition variable");
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80 cond.wait();
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81 }
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82
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83 debug (condition)
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84 log.trace("Condition variable was signaled");
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85 }
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86 }
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87 catch (SyncException e)
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88 {
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89 Stderr.formatln("Sync exception caught in Condition test thread {0}:\n{1}",
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90 Thread.getThis().name(), e.toString());
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91 }
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92 catch (Exception e)
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93 {
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94 Stderr.formatln("Unexpected exception caught in Condition test thread {0}:\n{1}",
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95 Thread.getThis().name(), e.toString());
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96 }
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97 debug (condition)
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98 log.trace("Exiting thread");
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99 }
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100
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101 thread = new Thread(¬ifyOneTestThread);
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102 thread.name = "thread-1";
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103
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104 debug (condition)
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105 log.trace("Created thread " ~ thread.name);
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106 thread.start();
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107
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108 try
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109 {
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110 // Poor man's barrier: wait until the other thread is waiting.
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111 while (true)
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112 {
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113 synchronized (mutex)
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114 {
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115 if (waiting != 1)
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116 {
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117 Thread.yield();
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118 }
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119 else
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120 {
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121 break;
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122 }
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123 }
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124 }
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125
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126 synchronized (mutex)
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127 {
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128 debug (condition)
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129 log.trace("Acquired mutex");
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130
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131 waiting++;
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132
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133 debug (condition)
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134 log.trace("Notifying test thread");
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135 cond.notify();
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136
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137 debug (condition)
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138 log.trace("Releasing mutex");
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139 }
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140
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141 thread.join();
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142
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143 if (waiting == 2)
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144 {
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145 debug (condition)
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146 log.info("The Condition notification test to one thread was successful");
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147 }
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148 else
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149 {
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150 debug (condition)
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151 {
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152 log.error("The condition variable notification to one thread is not working");
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153 assert(false);
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154 }
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155 else
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156 {
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157 assert(false, "The condition variable notification to one thread is not working");
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158 }
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159 }
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160 }
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161 catch (SyncException e)
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162 {
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163 Stderr.formatln("Sync exception caught in main thread:\n{0}", e.toString());
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164 }
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165 }
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166
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167
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168 /**
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169 * Test for Condition.notifyAll().
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170 */
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171 void testNotifyAll()
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172 {
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173 const uint MaxThreadCount = 10;
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174
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175 debug (condition)
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176 {
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177 Logger log = Log.getLogger("condition.notify-all");
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178 }
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179
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180 scope Mutex mutex = new Mutex();
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181 scope Condition cond = new Condition(mutex);
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182 int waiting = 0;
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183
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184 /**
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185 * This thread waits for a notification from the main thread.
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186 */
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187 void notifyAllTestThread()
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188 {
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189 debug (condition)
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190 {
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191 Logger log = Log.getLogger("condition.notify-all." ~ Thread.getThis().name());
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192
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193 log.trace("Starting thread");
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194 }
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195
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196 try
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197 {
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198 synchronized (mutex)
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199 {
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200 debug (condition)
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201 log.trace("Acquired mutex");
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202
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203 waiting++;
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204
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205 while (waiting != MaxThreadCount + 1)
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206 {
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207 debug (condition)
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208 log.trace("Waiting on condition variable");
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209 cond.wait();
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210 }
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211
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212 debug (condition)
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213 log.trace("Condition variable was signaled");
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214
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215 debug (condition)
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216 log.trace("Releasing mutex");
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217 }
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218 }
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219 catch (SyncException e)
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220 {
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221 Stderr.formatln("Sync exception caught in Condition test thread {0}:\n{1}",
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222 Thread.getThis().name(), e.toString());
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223 }
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224 catch (Exception e)
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225 {
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226 Stderr.formatln("Unexpected exception caught in Condition test thread {0}:\n{1}",
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227 Thread.getThis().name(), e.toString());
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228 }
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229 debug (condition)
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230 log.trace("Exiting thread");
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231 }
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232
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233 ThreadGroup group = new ThreadGroup();
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234 Thread thread;
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235 char[10] tmp;
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236
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237 for (uint i = 0; i < MaxThreadCount; ++i)
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238 {
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239 thread = new Thread(¬ifyAllTestThread);
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240 thread.name = "thread-" ~ format(tmp, i);
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241
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242 group.add(thread);
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243 debug (condition)
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244 log.trace("Created thread " ~ thread.name);
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245 thread.start();
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246 }
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247
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248 try
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249 {
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250 // Poor man's barrier: wait until all the threads are waiting.
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251 while (true)
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252 {
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253 synchronized (mutex)
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254 {
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255 if (waiting != MaxThreadCount)
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256 {
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257 Thread.yield();
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258 }
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259 else
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260 {
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261 break;
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262 }
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263 }
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264 }
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265
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266 synchronized (mutex)
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267 {
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268 debug (condition)
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269 log.trace("Acquired mutex");
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270
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271 waiting++;
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272
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273 debug (condition)
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274 log.trace("Notifying all threads");
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275 cond.notifyAll();
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276
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277 debug (condition)
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278 log.trace("Releasing mutex");
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279 }
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280
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281 debug (condition)
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282 log.trace("Waiting for threads to finish");
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283 group.joinAll();
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284
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285 if (waiting == MaxThreadCount + 1)
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286 {
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287 debug (condition)
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288 log.info("The Condition notification test to many threads was successful");
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289 }
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290 else
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291 {
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292 debug (condition)
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293 {
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294 log.error("The condition variable notification to many threads is not working");
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295 assert(false);
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296 }
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297 else
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298 {
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299 assert(false, "The condition variable notification to many threads is not working");
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300 }
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301 }
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302 }
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303 catch (SyncException e)
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304 {
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305 Stderr.formatln("Sync exception caught in main thread:\n{0}", e.toString());
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306 }
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307 }
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