如果阻塞工作线程，则需要确保仅在合理的时间内阻塞线程。

If a worker thread must be blocked, you need to ensure that the thread is blocked for only a reasonable amount of time.

youdao

如果您需要在指定的一段时间内阻塞发出调用的线程，那么请使用pthread_cond _ timewait来阻塞它。

If you need to block the calling thread for a specific time, then use the pthread_cond_timewait to block the thread.

youdao