使用pthread_cond_broadcast进行并行执行？

Question

I would like to use pthread_cond_broadcast() to wake up all threads that is waiting for the same condition.

However, it seems like those threads can't really run in parallel because they have to share the same mutex.

Am I right? Or there is a way to do so?

Thanks in advance.

Answer 1

每个线程必须在唤醒时获取锁，但如果紧接着工作可以并行进行，那么只需在最安全的时间点释放锁即可。