WebApr 5, 2024 · void * Tid1 ( void * arg) { key_t key = ftok ( "/home/ubuntu", 1 ); if (key < 0) { perror ( "ftok" ); //return NULL; } int msqid = msgget (key, IPC_CREAT 0664 ); if (msqid < 0) { perror ( "msgget" ); //return NULL; } while ( 1 ) { sem_wait (&sem1); // printf ("%d\n", __LINE__); printf ( "请输入数据类型\n" ); scanf ( "%ld", &snd1.mtype); WebThe pthread_join () function must be called to release the resources occupied by the thread. Example Code for Exiting Thread This program initializes 2 threads, they have the same priority, and the threads of the same priority are scheduled according to the time slice.
进程的一生(四)
WebNov 8, 2024 · Both use pthread_join (). The output is straightforward. The program won't go on until pthread_join () return. 2. Both use pthread_detach (). The order of sub-thread and main-thread is uncertain. the program won't wait return of fn1 or fn2. 3. Use neither pthread_join () or pthread_detach (). The output seems the same with case 2. Web参数2 ：线程属性，使用时通常为NULL，使用默认属性 参数3 ：线程函数指针 参数4 ：线程函数入参 返回值：0 成功，-1 失败 #include 2. int pthread_join(pthread_t thread, void **retval); 参数1：等待退出的线程ID 参数2：线程的结束信息，通常为NULL，不为NULL时注意 ... do army worms eat grass roots
POSIX Interface - RT-Thread document center
WebThe new thread terminates in one of the following ways: * It calls pthread_exit(3), specifying an exit status value that is available to another thread in the same process that calls … WebWrite a c program that create 4 threads with proper create, join, exit system callsand all threads are doing different jobs4. Write a c program that create an array of 4 threads … Web*/ Pthread_create (&tid1, NULL, count, NULL); Pthread_create (&tid2, NULL, count, NULL); /* Wait for threads to finish. */ Pthread_join (tid1, NULL); Pthread_join (tid2, NULL); if (cnt != (unsigned)NITERS * 2) printf ("BOOM! cnt = %d\n", cnt); else printf ("OK cnt … do army worms eat zoysia