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C++ TEventBase::runInLoop方法代码示例

本文整理汇总了C++中TEventBase::runInLoop方法的典型用法代码示例。如果您正苦于以下问题:C++ TEventBase::runInLoop方法的具体用法?C++ TEventBase::runInLoop怎么用?C++ TEventBase::runInLoop使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在TEventBase的用法示例。


在下文中一共展示了TEventBase::runInLoop方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: maxReadAtOnce

void QueueTest::maxReadAtOnce() {
  // Add 100 messages to the queue
  for (int n = 0; n < 100; ++n) {
    queue.putMessage(n);
  }

  TEventBase eventBase;

  // Record how many messages were processed each loop iteration.
  uint32_t messagesThisLoop = 0;
  std::vector<uint32_t> messagesPerLoop;
  std::function<void()> loopFinished = [&] {
    // Record the current number of messages read this loop
    messagesPerLoop.push_back(messagesThisLoop);
    // Reset messagesThisLoop to 0 for the next loop
    messagesThisLoop = 0;

    // To prevent use-after-free bugs when eventBase destructs,
    // prevent calling runInLoop any more after the test is finished.
    // 55 == number of times loop should run.
    if (messagesPerLoop.size() != 55) {
      // Reschedule ourself to run at the end of the next loop
      eventBase.runInLoop(loopFinished);
    }
  };
  // Schedule the first call to loopFinished
  eventBase.runInLoop(loopFinished);

  QueueConsumer consumer;
  // Read the first 50 messages 10 at a time.
  consumer.setMaxReadAtOnce(10);
  consumer.fn = [&](int value) {
    ++messagesThisLoop;
    // After 50 messages, drop to reading only 1 message at a time.
    if (value == 50) {
      consumer.setMaxReadAtOnce(1);
    }
    // Terminate the loop when we reach the end of the messages.
    if (value == 99) {
      eventBase.terminateLoopSoon();
    }
  };
  consumer.startConsuming(&eventBase, &queue);

  // Run the event loop until the consumer terminates it
  eventBase.loop();

  // The consumer should have read all 100 messages in order
  BOOST_CHECK_EQUAL(consumer.messages.size(), 100);
  for (int n = 0; n < 100; ++n) {
    BOOST_CHECK_EQUAL(consumer.messages.at(n), n);
  }

  // Currently TEventBase happens to still run the loop callbacks even after
  // terminateLoopSoon() is called.  However, we don't really want to depend on
  // this behavior.  In case this ever changes in the future, add
  // messagesThisLoop to messagesPerLoop in loop callback isn't invoked for the
  // last loop iteration.
  if (messagesThisLoop > 0) {
    messagesPerLoop.push_back(messagesThisLoop);
    messagesThisLoop = 0;
  }

  // For the first 5 loops it should have read 10 messages each time.
  // After that it should have read 1 messages per loop for the next 50 loops.
  BOOST_CHECK_EQUAL(messagesPerLoop.size(), 55);
  for (int n = 0; n < 5; ++n) {
    BOOST_CHECK_EQUAL(messagesPerLoop.at(n), 10);
  }
  for (int n = 5; n < 55; ++n) {
    BOOST_CHECK_EQUAL(messagesPerLoop.at(n), 1);
  }
}
开发者ID:343829084,项目名称:fbthrift,代码行数:73,代码来源:TNotificationQueueTest.cpp


注:本文中的TEventBase::runInLoop方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。