如何睡觉或在Linux上使用C暂停PTHREAD [英] How to sleep or pause a PThread in c on Linux
问题描述
我正在开发中,我也多线程的应用程序。我的一个工作线程对插件播放图像。另一个线程播放声音。我想停止/暂停/暂停/睡在一个按钮单击事件的线程。这是一样的,当我们点击视频播放器的播放/暂停按钮。
我使用的pthread库线程开发在Linux平台上我的C ++应用程序。
I am developing an application in which I do multithreading. One of my worker threads displays images on the widget. Another thread plays sound. I want to stop/suspend/pause/sleep the threads on a button click event. It is same as when we click on video player play/pause button. I am developing my application in c++ on linux platform using the pthread library for threading.
有人可以告诉我怎么实现线程暂停/暂停?
Can somebody tell me how I achieve threads pause/suspend?
推荐答案
您可以使用一个互斥体,条件变量和一个共享的标志变量来做到这一点。让我们假设这是全局定义的:
You can use a mutex, condition variable, and a shared flag variable to do this. Let's assume these are defined globally:
pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
int play = 0;
您可以构建您的播放code是这样的:
You could structure your playback code like this:
for(;;) { /* Playback loop */
pthread_mutex_lock(&lock);
while(!play) { /* We're paused */
pthread_cond_wait(&cond, &lock); /* Wait for play signal */
}
pthread_mutex_unlock(&lock);
/* Continue playback */
}
然后,发挥你可以这样做:
Then, to play you can do this:
pthread_mutex_lock(&lock);
play = 1;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&lock);
和暂停:
pthread_mutex_lock(&lock);
play = 0;
pthread_mutex_unlock(&lock);
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