本文整理汇总了C++中WorkItem::Callback方法的典型用法代码示例。如果您正苦于以下问题：C++ WorkItem::Callback方法的具体用法？C++ WorkItem::Callback怎么用？C++ WorkItem::Callback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类WorkItem的用法示例。
在下文中一共展示了WorkItem::Callback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: lock
/**
* Waits for work items and processes them.
*/
void ThreadPool::WorkerThread::ThreadProc(Queue& queue)
{
std::ostringstream idbuf;
idbuf << "Q #" << &queue << " W #" << this;
Utility::SetThreadName(idbuf.str());
for (;;) {
WorkItem wi;
{
boost::mutex::scoped_lock lock(queue.Mutex);
UpdateUtilization(ThreadIdle);
while (queue.Items.empty() && !queue.Stopped && !Zombie) {
if (queue.Items.empty())
queue.CVStarved.notify_all();
queue.CV.wait(lock);
}
if (Zombie)
break;
if (queue.Items.empty() && queue.Stopped)
break;
wi = queue.Items.front();
queue.Items.pop_front();
UpdateUtilization(ThreadBusy);
}
double st = Utility::GetTime();;
#ifdef _DEBUG
# ifdef RUSAGE_THREAD
struct rusage usage_start, usage_end;
(void) getrusage(RUSAGE_THREAD, &usage_start);
# endif /* RUSAGE_THREAD */
#endif /* _DEBUG */
try {
wi.Callback();
} catch (const std::exception& ex) {
std::ostringstream msgbuf;
msgbuf << "Exception thrown in event handler: " << std::endl
<< DiagnosticInformation(ex);
Log(LogCritical, "base", msgbuf.str());
} catch (...) {
Log(LogCritical, "base", "Exception of unknown type thrown in event handler.");
}
double et = Utility::GetTime();
double latency = st - wi.Timestamp;
{
boost::mutex::scoped_lock lock(queue.Mutex);
queue.WaitTime += latency;
queue.ServiceTime += et - st;
queue.TaskCount++;
}
#ifdef _DEBUG
# ifdef RUSAGE_THREAD
(void) getrusage(RUSAGE_THREAD, &usage_end);
double duser = (usage_end.ru_utime.tv_sec - usage_start.ru_utime.tv_sec) +
(usage_end.ru_utime.tv_usec - usage_start.ru_utime.tv_usec) / 1000000.0;
double dsys = (usage_end.ru_stime.tv_sec - usage_start.ru_stime.tv_sec) +
(usage_end.ru_stime.tv_usec - usage_start.ru_stime.tv_usec) / 1000000.0;
double dwait = (et - st) - (duser + dsys);
int dminfaults = usage_end.ru_minflt - usage_start.ru_minflt;
int dmajfaults = usage_end.ru_majflt - usage_start.ru_majflt;
int dvctx = usage_end.ru_nvcsw - usage_start.ru_nvcsw;
int divctx = usage_end.ru_nivcsw - usage_start.ru_nivcsw;
# endif /* RUSAGE_THREAD */
if (et - st > 0.5) {
std::ostringstream msgbuf;
# ifdef RUSAGE_THREAD
msgbuf << "Event call took user:" << duser << "s, system:" << dsys << "s, wait:" << dwait << "s, minor_faults:" << dminfaults << ", major_faults:" << dmajfaults << ", voluntary_csw:" << dvctx << ", involuntary_csw:" << divctx;
# else
msgbuf << "Event call took " << (et - st) << "s";
# endif /* RUSAGE_THREAD */
Log(LogWarning, "base", msgbuf.str());
}
#endif /* _DEBUG */
}
//.........这里部分代码省略.........