C++ wake up thread
WebFeb 19, 2013 · Basically, I have tried the approach of a mutex in the thread that calls WaitForSingleObject twice, expecting it to make the mutex non signaling the first call, but … WebJul 3, 2013 · After doing many tests, here are some facts about waking up select: 1) If the socket watched by select is closed by another application, then select () calling will wakeup immediately. Hereafter, reading from or writing to the socket will get return value of 0 with an errno = 0. 2) If the socket watched by select is closed by another thread of ...
C++ wake up thread
Did you know?
WebAug 7, 2015 · You can deal with spurious wakeups by passing a boolean flag to the thread by reference and check it when cv.wait_until () is not a timeout. In this case when main () thread does not set terminate and cv.wait_until () has no_timeout, it means timeout is not reached but cv is notified (by system), and so it is a spurious call. WebNov 24, 2024 · It makes the current thread to block until the condition variable get signaled or a spurious wake up happens. Read More Designing Code to Convert the base of a Number to any other base in Number System
WebApr 3, 2014 · The idea is to lock a mutex and use a wait condition's wait (QMutex*,long) function to replace your sleep, and use wakeAll () or wakeOne () in your stop () function. … WebMay 20, 2024 · If your thread is inside a call to Sleep, then there isn't (usually) a way to wake it up.(The only exception I'm aware of is Java, which allows a sleep to be ended early if some other thread calls thread.interrupt().). The pattern that you're talking about seems to call for an event: the thread contains a loop, at the top of which it waits for an event to fire.
WebSorted by: 8. Assuming that your vendor's standard library uses the pthread_cond_* functions to implement C++11 condition variables (libstdc++ and libc++ do this), the … WebMar 31, 2024 · In this article, we will discuss how to wake up a std::thread while it is sleeping. It is known that a thread can’t be exited when it is sleeping. So it is woken up using a command as: std::condition_variable …
WebFeb 15, 2013 · Then your application just sets the signal and anyone that is sleeping will wake up and can exit. It is a much cleaner solution since it gives the thread body a chance to cleanup whatever it might be doing - including releasing locks! Response to Update In this specific case, call select with a timeout before you call accept. Share
WebFeb 26, 2013 · If another thread wants to wake up waiting thread, it must set condition flag to true. E.g.: condition = true; condvar.notify_one(); I wonder, is it possible for condition variable to be blocked by this scenario: 1)Waiting thread checks condition flag, and finds it is equal to FALSE, so, it's going to enter condvar.wait() routine. stanley tucci new seasonWebGenerally, the function is notified to wake up by a call in another thread either to member notify_one or to member notify_all. But certain implementations may produce spurious wake-up calls without any of these functions being called. Therefore, users of this function shall ensure their condition for resumption is met. stanley tucci new seriesWebJun 25, 2011 · pthread_cond_signal () will wake up "at least one" thread waiting on the condition variable, whereas pthread_cond_broadcast () will wake up all threads. In theory, pthread_cond_signal () should only wake up one thread most of the time, but I don't know if that's true or not in practice. – Adam Rosenfield May 22, 2009 at 17:17 perth same day flower deliveryWebApr 3, 2014 · Here is a little example code that show the basic problem. Let's start with the thread that in this example sleeps for 5 seconds and then just prints a dot. #include #include "TestThread.h" void TestThread::run () { running = true; while (running == true) { qDebug () << "."; perth same day delivery hamperWebNov 1, 2016 · Instead, I want to tell epoll -thread: "wake up and do something with Connection " -- epoll_wait () should return and my code will find out that a CUSTOM EVENT is occured (and, for example, some function should be called, where the desired access to Connection will be performed (assign sending data to object, calling writeEvent () ), then … stanley tucci no shirtWebThen the function returns (notice that this last mutex locking may block again the thread before returning). Generally, the function is notified to wake up by a call in another thread either to member notify_one or to member notify_all. But certain implementations may produce spurious wake-up calls without any of these functions being called ... stanley tucci on cnn italyWebMay 18, 2016 · Calling check.Set () in your code will trigger the "do work" branch in the thread and stop.Set () will cause the thread to terminate gracefully. Once your code has called stop.Set () to terminate the thread, it can call the thread's Join () method to wait until the thread terminates. EDIT I misunderstood the question. perths around the world