linux pthread 多线程控制示例代码

/* ============================================================================ Name : timewait.c Author : Version : Copyright : Your copyright notice Description : Hello World in C, Ansi-style ============================================================================ */ #include <stdio.h> #include <stdlib.h> //#include <stdio.h> #include <sys/time.h> #include <unistd.h> #include <pthread.h> #include <errno.h> static pthread_t thread; static pthread_cond_t cond; static pthread_mutex_t mutex; static int flag = 0; void * thr_fn(void * arg) { struct timeval now; struct timespec outtime; pthread_mutex_lock(&mutex); int i=0; while (flag) { printf("*****:%d \n",i++); gettimeofday(&now, NULL); outtime.tv_sec = now.tv_sec + 5; outtime.tv_nsec = now.tv_usec * 1000; pthread_cond_timedwait(&cond, &mutex, &outtime); // pthread_cond_wait(&cond, &mutex); } pthread_mutex_unlock(&mutex); printf("cond thread exit\n"); } int main(void) { pthread_mutex_init(&mutex, NULL); pthread_cond_init(&cond, NULL); flag=1; if (0 != pthread_create(&thread, NULL, thr_fn, NULL)) { printf("error when create pthread\n"); return 1; } char c ; while ((c = getchar()) != 'q'); printf("Now terminate the thread!\n"); //pthread_mutex_lock(&mutex); flag = 0; // pthread_cond_signal(&cond); // pthread_mutex_unlock(&mutex); printf("Wait for thread to exit\n"); pthread_join(thread, NULL); printf("Bye\n"); // return 0; //puts("!!!Hello World!!!"); /* prints !!!Hello World!!! */ return EXIT_SUCCESS; }