1 | // |
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2 | // Timer.cpp |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/src/Timer.cpp#7 $ |
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5 | // |
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6 | // Library: Foundation |
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7 | // Package: Threading |
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8 | // Module: Timer |
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9 | // |
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10 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
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11 | // and Contributors. |
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12 | // |
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13 | // Permission is hereby granted, free of charge, to any person or organization |
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14 | // obtaining a copy of the software and accompanying documentation covered by |
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15 | // this license (the "Software") to use, reproduce, display, distribute, |
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16 | // execute, and transmit the Software, and to prepare derivative works of the |
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17 | // Software, and to permit third-parties to whom the Software is furnished to |
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18 | // do so, all subject to the following: |
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19 | // |
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20 | // The copyright notices in the Software and this entire statement, including |
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21 | // the above license grant, this restriction and the following disclaimer, |
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22 | // must be included in all copies of the Software, in whole or in part, and |
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23 | // all derivative works of the Software, unless such copies or derivative |
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24 | // works are solely in the form of machine-executable object code generated by |
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25 | // a source language processor. |
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26 | // |
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27 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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28 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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29 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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30 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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31 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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32 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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33 | // DEALINGS IN THE SOFTWARE. |
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34 | // |
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35 | |
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36 | |
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37 | #include <Poco/Timer.h> |
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38 | #include <Poco/ThreadPool.h> |
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39 | #include <Poco/Exception.h> |
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40 | #include <Poco/ErrorHandler.h> |
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41 | |
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42 | |
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43 | namespace Poco { |
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44 | |
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45 | |
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46 | Timer::Timer(long startInterval, long periodicInterval): |
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47 | _startInterval(startInterval), |
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48 | _periodicInterval(periodicInterval), |
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49 | _pCallback(0) |
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50 | { |
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51 | poco_assert (startInterval >= 0 && periodicInterval >= 0); |
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52 | } |
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53 | |
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54 | |
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55 | Timer::~Timer() |
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56 | { |
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57 | stop(); |
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58 | } |
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59 | |
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60 | |
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61 | void Timer::start(const AbstractTimerCallback& method) |
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62 | { |
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63 | start(method, Thread::PRIO_NORMAL, ThreadPool::defaultPool()); |
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64 | } |
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65 | |
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66 | |
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67 | void Timer::start(const AbstractTimerCallback& method, Thread::Priority priority) |
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68 | { |
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69 | start(method, priority, ThreadPool::defaultPool()); |
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70 | } |
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71 | |
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72 | |
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73 | void Timer::start(const AbstractTimerCallback& method, ThreadPool& threadPool) |
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74 | { |
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75 | start(method, Thread::PRIO_NORMAL, threadPool); |
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76 | } |
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77 | |
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78 | |
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79 | void Timer::start(const AbstractTimerCallback& method, Thread::Priority priority, ThreadPool& threadPool) |
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80 | { |
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81 | Timestamp nextInvocation; |
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82 | nextInvocation += _startInterval*1000; |
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83 | |
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84 | poco_assert (!_pCallback); |
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85 | |
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86 | FastMutex::ScopedLock lock(_mutex); |
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87 | _nextInvocation = nextInvocation; |
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88 | _pCallback = method.clone(); |
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89 | _wakeUp.reset(); |
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90 | threadPool.startWithPriority(priority, *this); |
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91 | } |
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92 | |
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93 | |
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94 | void Timer::stop() |
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95 | { |
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96 | FastMutex::ScopedLock lock(_mutex); |
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97 | if (_pCallback) |
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98 | { |
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99 | _periodicInterval = 0; |
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100 | _mutex.unlock(); |
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101 | _wakeUp.set(); |
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102 | _done.wait(); // warning: deadlock if called from timer callback |
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103 | _mutex.lock(); |
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104 | delete _pCallback; |
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105 | _pCallback = 0; |
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106 | } |
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107 | } |
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108 | |
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109 | |
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110 | void Timer::restart() |
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111 | { |
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112 | FastMutex::ScopedLock lock(_mutex); |
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113 | if (_pCallback) |
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114 | { |
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115 | _wakeUp.set(); |
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116 | } |
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117 | } |
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118 | |
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119 | |
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120 | void Timer::restart(long milliseconds) |
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121 | { |
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122 | poco_assert (milliseconds >= 0); |
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123 | FastMutex::ScopedLock lock(_mutex); |
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124 | if (_pCallback) |
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125 | { |
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126 | _periodicInterval = milliseconds; |
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127 | _wakeUp.set(); |
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128 | } |
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129 | } |
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130 | |
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131 | |
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132 | long Timer::getStartInterval() const |
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133 | { |
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134 | FastMutex::ScopedLock lock(_mutex); |
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135 | return _startInterval; |
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136 | } |
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137 | |
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138 | |
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139 | void Timer::setStartInterval(long milliseconds) |
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140 | { |
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141 | poco_assert (milliseconds >= 0); |
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142 | FastMutex::ScopedLock lock(_mutex); |
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143 | _startInterval = milliseconds; |
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144 | } |
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145 | |
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146 | |
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147 | long Timer::getPeriodicInterval() const |
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148 | { |
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149 | FastMutex::ScopedLock lock(_mutex); |
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150 | return _periodicInterval; |
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151 | } |
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152 | |
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153 | |
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154 | void Timer::setPeriodicInterval(long milliseconds) |
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155 | { |
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156 | poco_assert (milliseconds >= 0); |
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157 | FastMutex::ScopedLock lock(_mutex); |
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158 | _periodicInterval = milliseconds; |
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159 | } |
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160 | |
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161 | |
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162 | void Timer::run() |
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163 | { |
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164 | Timestamp now; |
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165 | long interval(0); |
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166 | do |
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167 | { |
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168 | now.update(); |
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169 | long sleep = static_cast<long>((_nextInvocation - now)/1000); |
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170 | if (sleep < 0) sleep = 0; |
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171 | if (_wakeUp.tryWait(sleep)) |
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172 | { |
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173 | FastMutex::ScopedLock lock(_mutex); |
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174 | _nextInvocation.update(); |
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175 | interval = _periodicInterval; |
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176 | } |
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177 | else |
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178 | { |
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179 | try |
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180 | { |
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181 | _pCallback->invoke(*this); |
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182 | } |
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183 | catch (Exception& exc) |
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184 | { |
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185 | ErrorHandler::handle(exc); |
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186 | } |
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187 | catch (std::exception& exc) |
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188 | { |
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189 | ErrorHandler::handle(exc); |
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190 | } |
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191 | catch (...) |
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192 | { |
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193 | ErrorHandler::handle(); |
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194 | } |
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195 | { |
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196 | FastMutex::ScopedLock lock(_mutex); |
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197 | interval = _periodicInterval; |
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198 | } |
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199 | } |
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200 | _nextInvocation += static_cast<Timestamp::TimeDiff>(interval)*1000; |
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201 | } |
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202 | while (interval > 0); |
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203 | _done.set(); |
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204 | } |
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205 | |
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206 | |
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207 | AbstractTimerCallback::AbstractTimerCallback() |
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208 | { |
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209 | } |
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210 | |
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211 | |
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212 | AbstractTimerCallback::AbstractTimerCallback(const AbstractTimerCallback& callback) |
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213 | { |
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214 | } |
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215 | |
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216 | |
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217 | AbstractTimerCallback::~AbstractTimerCallback() |
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218 | { |
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219 | } |
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220 | |
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221 | |
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222 | AbstractTimerCallback& AbstractTimerCallback::operator = (const AbstractTimerCallback& callback) |
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223 | { |
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224 | return *this; |
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225 | } |
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226 | |
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227 | |
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228 | } // namespace Poco |
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