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.

函數pthread_cond_wait主要就是用於阻塞線程的，它有兩個參數；第一個是一個指向條件變量的指針，第二個是一個鎖定了的互斥量。