子线程循环 3 次，接着主线程循环 6 次，接着又回到子线程循环 3 次，接着再回到主线程又循环6 次，如此循环50次。

来源：互联网发布：linux网络编程看什么书编辑：程序博客网时间：2024/06/06 02:28

#include <stdio.h>#include <stdlib.h>#include <pthread.h>pthread_mutex_t mutex;pthread_cond_t cond;int main_flog = 0;int sub_flog = 0;int main_count = 0;int sub_count = 0;void *sub_thread_func(void *argv);void main_thread_func();int main(){pthread_t tid;int ret;pthread_mutex_init(&mutex,NULL);pthread_cond_init(&cond,NULL);ret = pthread_create(&tid,NULL,sub_thread_func,NULL);if(ret == -1){perror("pthread_create errpr!\n");exit(-1);}main_thread_func();ret = pthread_join(tid,NULL);if(ret == -1){printf("pthread_join error!\n");exit(-1);}return 0;}void *sub_thread_func(void *argv){int i;while(1){sub_count++;for(i = 1; i <= 3; i++){printf("sub pthread%d:%d\n",sub_count,i);}while(1){pthread_mutex_lock(&mutex);if(main_flog == 1){ pthread_cond_signal(&cond);pthread_mutex_unlock(&mutex);break;}pthread_mutex_unlock(&mutex);}pthread_mutex_lock(&mutex);sub_flog = 1;pthread_cond_wait(&cond,&mutex);sub_flog = 0;pthread_mutex_unlock(&mutex);//sub_count++;if(sub_count >= 50){printf("sub_pthread loop 50 times!\n");break;}}return (void *)0;}void main_thread_func(void){int i;while(1){main_count++;pthread_mutex_lock(&mutex);main_flog = 1;pthread_cond_wait(&cond,&mutex);main_flog = 0;pthread_mutex_unlock(&mutex);for(i = 1; i <= 6; i++){printf("mainphread%d:%d\n",main_count,i);}while(1){pthread_mutex_lock(&mutex);if(sub_flog == 1){   pthread_cond_signal(&cond);pthread_mutex_unlock(&mutex);break;}pthread_mutex_unlock(&mutex);}//main_count++;if(main_count >= 50){printf("main_phread loop 50 times!\n");break;}}}

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