pthread

This function is similar to pthread_cond_wait, except that the third argument is the absolute time value until which the reader thread is willing to wait before it gives up.

The function primarily used for this is pthread_cond_wait . It takes two arguments; the first is a pointer to a condition variable, and the second is a locked mutex.

函数pthread_cond_wait主要就是用于阻塞线程的，它有两个参数；第一个是一个指向条件变量的指针，第二个是一个锁定了的互斥量。