Linux C notes (BOOK UNIX)

Chapter 1: Thread
① thread functions
1. pthread_self();
2. thread existing
    you can get the value of rval_ptr just by  pthread_join(pthread_t tht, void ** rval_ptr)
    cancel a thread as the thread exits with PTHREAD_CANCELED in pthread_exit, this function        only send a signal but not wait until the thread really exits
        We can give a function to a thread with which the thread can invoke it when it exits. This
        pthread_clean_push
        These two functions must be in pairs in your function routines but not in the main                function. And one thing should be mentioned as : the routine should not be returned but
        pthread_detach(pthread_t tid)
4. Thread synchronization of thread
② thread. synchronics
        pthread_mutex_t variable
        pthread_mutex_destroy()
        ii. Lock
        pthread_mutex_trylock() return instantly
        pthread_unlock()
        pthread_rwlook_t
        pthread_rwlock_init
        pthread_rwlock_destroy
        ii. Lock
        pthread_rwlock_wrlook
        pthread_rwlock_unlock
        pthread_rwlock_tryrdlock
        pthread_rwlock_trywrlock        
    3. Cond
        i. initiation
        pthread_cond_init(&pcndt, attr);