C语言互斥锁-双条件变量实现循环打印

#include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <error.h>#include <unistd.h>#include <pthread.h>int number[10]={1,2,3,4,5,6,7,8,9,10}; pthread_mutex_t mutex;pthread_cond_t cond;pthread_cond_t cond2;int i=0;//数组下标void read_even(void)//此线程用来打印偶数{do{pthread_mutex_lock(&mutex);//锁定互斥锁if(i%2==0)//对应是奇数，就阻塞线程{/*阻塞线程,等待另外一个线程发送信号，同时为公共数据区解锁*/pthread_cond_wait(&cond,&mutex);}else if(i%2==1)//偶数，打印{printf("thread2--->number[%d]=%d\n",i,number[i]);i++;pthread_cond_signal(&cond2);//条件改变，唤醒阻塞的线程}pthread_mutex_unlock(&mutex);//打开互斥锁}while(i<=9);pthread_exit(NULL);}void read_odd(void)//此线程用来打印奇数{do{pthread_mutex_lock(&mutex);if(i%2==1){pthread_cond_wait(&cond2,&mutex);}else if(i%2==0){printf("thread1--->number[%d]=%d\n",i,number[i]);i++;pthread_cond_signal(&cond);//条件改变，唤醒阻塞的线程}pthread_mutex_unlock(&mutex);}while(i<=9);pthread_exit(NULL);}int main(int argc,char **argv){pthread_t id,id2;int ret=-1;pthread_cond_init(&cond,NULL);//初始化条件变量pthread_cond_init(&cond2,NULL);pthread_mutex_init(&mutex,NULL);//初始化互斥锁ret=pthread_create(&id,NULL,(void *)read_odd,NULL);if(ret!=0){printf ("Create pthread error!\n");exit (1);}ret=pthread_create(&id2,NULL,(void *)read_even,NULL);//返回值为0，创建成功if(ret!=0){printf ("Create pthread error!\n");exit (1);}pthread_join(id,NULL);pthread_join(id2,NULL);pthread_mutex_destroy(&mutex);//销毁互斥锁pthread_cond_destroy(&cond);//销毁条件变量pthread_cond_destroy(&cond2);return 0;}