2.6 作业

#include 

int num=4;
pthread_mutex_t mutex;
pthread_cond_t cond;

void *task1(void *arg){
	while(1){
		sleep(1);
		printf("生产者生产了三辆小汽车\n");
		pthread_cond_broadcast(&cond);
	}
	pthread_exit(NULL);
}

void *task2(void *arg){
	while(1){
		sleep(1);
		pthread_mutex_lock(&mutex);
		pthread_cond_wait(&cond,&mutex);
		printf("消费者消费了一辆小汽车\n");
		pthread_mutex_unlock(&mutex);
	}
	pthread_exit(NULL);
}


int main(int argc, const char *argv[])
{
	pthread_t tid1,tid2,tid3,tid4;

	pthread_mutex_init(&mutex,NULL);

	pthread_cond_init(&cond,NULL);
	if(pthread_create(&tid1,NULL,task1,NULL)!=0){
		perror("pthread_create task1 error");
		return -1;
	}

	if(pthread_create(&tid2,NULL,task2,NULL)!=0){
		perror("pthread_create task2 error");
		return -1;
	}
	if(pthread_create(&tid3,NULL,task2,NULL)!=0){
		perror("pthread_create task1 error");
		return -1;
	}

	if(pthread_create(&tid4,NULL,task2,NULL)!=0){
		perror("pthread_create task2 error");
		return -1;
	}
	pthread_join(tid1,NULL);
	pthread_join(tid2,NULL);
	pthread_join(tid3,NULL);
	pthread_join(tid4,NULL);

	pthread_mutex_destroy(&mutex);
	pthread_cond_destroy(&cond);
	return 0;
}

结果：