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);