1 | // [Licence]
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2 | // The Ariba-Underlay Copyright
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3 | //
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4 | // Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)
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5 | //
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6 | // Institute of Telematics
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7 | // UniversitÀt Karlsruhe (TH)
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8 | // Zirkel 2, 76128 Karlsruhe
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9 | // Germany
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10 | //
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11 | // Redistribution and use in source and binary forms, with or without
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12 | // modification, are permitted provided that the following conditions are
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13 | // met:
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14 | //
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15 | // 1. Redistributions of source code must retain the above copyright
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16 | // notice, this list of conditions and the following disclaimer.
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17 | // 2. Redistributions in binary form must reproduce the above copyright
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18 | // notice, this list of conditions and the following disclaimer in the
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19 | // documentation and/or other materials provided with the distribution.
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20 | //
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21 | // THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND
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22 | // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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23 | // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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24 | // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ARIBA PROJECT OR
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25 | // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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26 | // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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27 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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28 | // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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29 | // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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30 | // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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31 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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32 | //
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33 | // The views and conclusions contained in the software and documentation
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34 | // are those of the authors and should not be interpreted as representing
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35 | // official policies, either expressed or implied, of the Institute of
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36 | // Telematics.
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37 |
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38 | #include "SystemQueue.h"
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39 |
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40 | namespace ariba {
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41 | namespace utility {
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42 |
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43 | use_logging_cpp(SystemQueue);
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44 |
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45 | SystemQueue::SystemQueue()
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46 | #ifndef UNDERLAY_OMNET
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47 | : delayScheduler( &directScheduler ), systemQueueRunning( false )
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48 | #endif
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49 | {
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50 | }
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51 |
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52 | SystemQueue::~SystemQueue() {
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53 | }
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54 |
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55 | void SystemQueue::scheduleEvent( const SystemEvent& event, uint32_t delay ) {
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56 | #ifndef UNDERLAY_OMNET
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57 | if( delay == 0 ) directScheduler.insert( event, delay );
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58 | else delayScheduler.insert ( event, delay );
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59 | #else
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60 | Enter_Method_Silent();
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61 | cMessage* msg = new cMessage();
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62 | msg->setContextPointer( new SystemEvent(event) );
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63 |
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64 | if( delay == 0 )
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65 | cSimpleModule::scheduleAt( cSimpleModule::simTime(), msg );
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66 | else
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67 | cSimpleModule::scheduleAt( cSimpleModule::simTime()+((double)delay/1000.0), msg );
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68 | #endif
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69 | }
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70 |
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71 | #ifdef UNDERLAY_OMNET
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72 | void SystemQueue::handleMessage(cMessage* msg){
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73 | SystemEvent* event = (SystemEvent*)msg->contextPointer();
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74 |
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75 | event->listener->handleSystemEvent( *event );
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76 |
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77 | delete event; delete msg;
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78 | }
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79 | #endif
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80 |
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81 | void SystemQueue::run() {
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82 | #ifndef UNDERLAY_OMNET
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83 | systemQueueRunning = true;
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84 | directScheduler.run();
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85 | delayScheduler.run();
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86 | #endif
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87 | }
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88 |
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89 | void SystemQueue::cancel() {
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90 | #ifndef UNDERLAY_OMNET
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91 | systemQueueRunning = false;
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92 | directScheduler.cancel();
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93 | delayScheduler.cancel();
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94 | #endif
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95 | }
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96 |
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97 | bool SystemQueue::isEmpty() {
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98 | #ifndef UNDERLAY_OMNET
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99 | return directScheduler.isEmpty() || delayScheduler.isEmpty();
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100 | #else
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101 | return false;
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102 | #endif
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103 | }
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104 |
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105 | bool SystemQueue::isRunning() {
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106 | #ifndef UNDERLAY_OMNET
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107 | return systemQueueRunning;
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108 | #else
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109 | return true;
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110 | #endif
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111 | }
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112 |
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113 | //***************************************************************
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114 | #ifndef UNDERLAY_OMNET
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115 |
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116 | SystemQueue::QueueThread::QueueThread(QueueThread* _transferQueue)
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117 | : running( false ), transferQueue( _transferQueue ) {
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118 | }
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119 |
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120 | SystemQueue::QueueThread::~QueueThread(){
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121 | }
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122 |
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123 | void SystemQueue::QueueThread::run(){
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124 | running = true;
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125 | queueThread = new boost::thread(
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126 | boost::bind(&QueueThread::threadFunc, this) );
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127 | }
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128 |
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129 | void SystemQueue::QueueThread::cancel(){
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130 |
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131 | // cause the thread to exit
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132 | running = false;
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133 | itemsAvailable.notify_all();
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134 |
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135 | // wait that the thread has exited
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136 | // and delete it, so that a subsuquent run() can be called
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137 |
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138 | queueThread->join();
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139 | delete queueThread;
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140 | queueThread = NULL;
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141 |
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142 | while( eventsQueue.size() > 0 ){
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143 | eventsQueue.erase( eventsQueue.begin() );
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144 | }
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145 | }
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146 |
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147 | bool SystemQueue::QueueThread::isEmpty(){
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148 | boost::mutex::scoped_lock lock( queueMutex );
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149 | return eventsQueue.empty();
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150 | }
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151 |
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152 | void SystemQueue::QueueThread::insert( const SystemEvent& event, uint32_t delay ){
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153 | {
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154 | boost::mutex::scoped_lock lock( queueMutex );
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155 |
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156 | eventsQueue.push_back( event );
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157 | eventsQueue.back().scheduledTime = boost::posix_time::microsec_clock::local_time();
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158 | eventsQueue.back().delayTime = delay;
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159 | eventsQueue.back().remainingDelay = delay;
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160 |
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161 | onItemInserted( event );
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162 | itemsAvailable.notify_all();
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163 | }
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164 | }
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165 |
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166 | void SystemQueue::QueueThread::threadFunc( QueueThread* obj ) {
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167 |
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168 | boost::mutex::scoped_lock lock( obj->queueMutex );
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169 |
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170 | while( obj->running ) {
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171 |
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172 | // wait until an item is in the queue or we are notified
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173 | // to quit the thread. in case the thread is about to
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174 | // quit, the queueThreadRunning variable will indicate
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175 | // this and cause the thread to exit
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176 |
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177 | while ( obj->eventsQueue.empty() && obj->running ){
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178 |
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179 | const boost::system_time duration =
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180 | boost::get_system_time() +
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181 | boost::posix_time::milliseconds(40);
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182 |
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183 | obj->itemsAvailable.wait( lock );
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184 | // obj->itemsAvailable.timed_wait( lock, duration );
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185 | }
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186 |
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187 | // work all the items that are currently in the queue
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188 |
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189 | while( !obj->eventsQueue.empty() ) {
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190 |
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191 | // fetch the first item in the queue and deliver it to the
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192 | // queue handler
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193 | SystemEvent ev = obj->eventsQueue.front();
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194 | obj->eventsQueue.erase( obj->eventsQueue.begin() );
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195 |
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196 | {
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197 | // unlock the queue to that an event handler
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198 | // can insert new items into the queue
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199 | // obj->queueMutex.unlock();
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200 | obj->onNextQueueItem( ev );
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201 | // obj->queueMutex.lock();
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202 | }
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203 |
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204 | } // !obj->eventsQueue.empty() )
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205 | } // while (obj->running)
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206 | }
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207 |
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208 | //***************************************************************
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209 |
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210 | SystemQueue::QueueThreadDirect::QueueThreadDirect(){
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211 | }
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212 |
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213 | SystemQueue::QueueThreadDirect::~QueueThreadDirect(){
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214 | }
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215 |
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216 | void SystemQueue::QueueThreadDirect::onItemInserted( const SystemEvent& event ){
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217 | // do nothing here
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218 | }
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219 |
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220 | void SystemQueue::QueueThreadDirect::onNextQueueItem( const SystemEvent& event ){
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221 | // directly deliver the item to the
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222 | event.listener->handleSystemEvent( event );
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223 | }
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224 |
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225 | //***************************************************************
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226 |
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227 | SystemQueue::QueueThreadDelay::QueueThreadDelay(QueueThread* _transferQueue)
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228 | : QueueThread( _transferQueue ), isSleeping( false ) {
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229 |
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230 | assert( _transferQueue != NULL );
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231 | }
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232 |
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233 | SystemQueue::QueueThreadDelay::~QueueThreadDelay(){
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234 | }
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235 |
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236 | void SystemQueue::QueueThreadDelay::onItemInserted( const SystemEvent& event ){
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237 |
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238 | if( !isSleeping) return;
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239 |
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240 | // break an existing sleep and
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241 | // remember the time that was actually slept for
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242 | // and change it for every event in the queue
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243 |
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244 | assert( !eventsQueue.empty());
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245 | sleepCond.notify_all();
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246 |
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247 | ptime sleepEnd = boost::posix_time::microsec_clock::local_time();
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248 | boost::posix_time::time_duration duration = sleepEnd - sleepStart;
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249 | uint32_t sleptTime = duration.total_milliseconds();
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250 |
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251 | EventQueue::iterator i = eventsQueue.begin();
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252 | EventQueue::iterator iend = eventsQueue.end();
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253 |
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254 | for( ; i != iend; i++ ) {
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255 |
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256 | if( sleptTime >= i->remainingDelay)
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257 | i->remainingDelay = 0;
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258 | else
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259 | i->remainingDelay -= sleptTime;
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260 |
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261 | } // for( ; i != iend; i++ )
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262 |
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263 | // now we have to reorder the events
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264 | // in the queue with respect to their remaining delay
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265 | // the SystemQueue::operator< takes care of the
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266 | // ordering with respect to the remaining delay
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267 |
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268 | std::sort( eventsQueue.begin(), eventsQueue.end() );
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269 |
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270 | }
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271 |
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272 | void SystemQueue::QueueThreadDelay::onNextQueueItem( const SystemEvent& event ){
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273 |
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274 | // sleeps will be cancelled in the
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275 | // onItemInserted function when a new
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276 | // event arrives during sleeping
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277 |
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278 | assert( !isSleeping );
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279 |
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280 | // the given item is the one with the least
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281 | // amount of sleep time left. because all
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282 | // items are reordered in onItemInserted
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283 |
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284 | if( event.remainingDelay > 0 ) {
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285 |
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286 | const boost::system_time duration =
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287 | boost::get_system_time() +
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288 | boost::posix_time::milliseconds(event.remainingDelay);
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289 |
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290 | {
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291 | boost::unique_lock<boost::mutex> lock( sleepMutex );
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292 |
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293 | sleepStart = boost::posix_time::microsec_clock::local_time();
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294 | isSleeping = true;
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295 |
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296 | sleepCond.timed_wait( lock, duration );
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297 |
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298 | isSleeping = false;
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299 | }
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300 |
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301 | } // if( event.remainingDelay > 0 )
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302 |
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303 | // if the sleep succeeded and was not
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304 | // interrupted by a new incoming item
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305 | // we can now deliver this event
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306 |
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307 | ptime sleepEnd = boost::posix_time::microsec_clock::local_time();
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308 | boost::posix_time::time_duration duration = sleepEnd - sleepStart;
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309 | uint32_t sleptTime = duration.total_milliseconds();
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310 |
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311 | if (event.remainingDelay <= sleptTime)
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312 | transferQueue->insert( event, 0 );
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313 | }
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314 |
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315 | #endif // #ifndef UNDERLAY_OMNET
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316 |
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317 | //***************************************************************
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318 |
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319 | }} // spovnet, common
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