C++ wake up thread

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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 …

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WebMar 28, 2024 · The sched_wakeup_granularity_ns: This OS setting controls the wake-up preemption granularity. Increasing this variable reduces wake-up preemption, reducing disturbance of compute bound tasks. Lowering it improves wake-up latency and throughput for latency critical tasks, particularly when a short duty cycle load component must … WebNov 23, 2024 · If 1+ threads are waiting, notify_one it is guaranteed to wake one. BUT if no threads are waiting, the notification is consumed (and has no effect). Note that under certain edge conditions, notify_one may actually wake more than one. Also, a thread may wake from wait without anyone having called notify_one ("Spurious wake up"). legacy classic bunkhouse

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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 ... 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 16, 2016 · When you call cv.notify_one, the waiting thread (one of the waiting threads, if there are more than one) will wake up. The thread that just woke up will then lock the … legacy classic fountain pen kit instructions

Using Waitable Timers with an Asynchronous Procedure Call

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WebAssuming that your vendor's standard library uses the pthread_cond_* functions to implement C++11 condition variables (libstdc++ and libc++ do this), the pthread_cond_* functions are not async-signal-safe so cannot be invoked from a signal handler. From http://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_cond_broadcast.html: legacy classic furniture dealer loginWebAug 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. legacy classic dining room

"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. " - C++ wake up thread

C++ wake up thread

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 19, 2013 · 2,447 1 28 41 1 A mutex is not the right synchronization primitive for this situation. Firstly, as you've already noted, a mutex is reentrant, so you can't wait on a mutex you already own; secondly, even if you could, you'd wind up stuck because only the thread that owns the mutex can release it.

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WebMar 31, 2024 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. WebMar 23, 2024 · Is the only way to do this for the thread to itself choose to sleep and then check its queue, or some variable somewhere when it wakes, then sleep again? Another …

WebJun 1, 2024 · You can interrupt a waiting thread by calling the Thread.Interrupt method on the blocked thread to throw a ThreadInterruptedException, which breaks the thread out … WebNov 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 …

WebJan 8, 2024 · 1) Atomically releases lock, blocks the current executing thread, and adds it to the list of threads waiting on * this. The thread will be unblocked when notify_all() or … WebApr 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 () << ".";

WebSep 30, 2014 · 1. You can use a timed-wait on a condition variable, which will wake up when that time is reached / has elapsed. You can also just make a thread sleep for a …

WebMay 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. legacy classic furniture kateriWebAug 13, 2024 · You can sleep a thread using sigwait, and then signal that thread to wake up with pthread_kill. Kill sounds bad, but it doesn't kill the thread, it sends a signal. This … legacy classic enchanted desk computerWebApr 8, 2011 · @Tony: The latency shouldn't be affected by the lock time because it is called by the master thread after signal. That leaves unlock, which is fast, and cond_signal and the return sequence from cond_wait, which should be about as … legacy classic cribsWebJan 17, 2024 · The worker thread is responsible for some streaming data processing, while the main thread is mainly responsible for GUI event processing. // do something 1 is about some initialization that should be done inside the worker thread. The main thread should wait for the worker thread to finish it. legacy classic furniture bunk bedWebNov 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 legacy classic dining room furnitureWebApr 8, 2011 · If they are taking a large fraction of your time, it is quite possible that you are trying to switch threads too often. Try buffering up a work queue, and send the signal … legacy classic fulton county bedWebApr 12, 2024 · C++中监视线程卡死并自动崩溃退出 WatchDog 发表于 2024-04-12 分类于开发 Valine：本文字数： 2.2k 阅读时长 ≈ 2 分钟之前写过在Python中监视卡死崩溃退出并打印卡死处的调用堆栈 legacy classic furniture kateri sideboard