信号_线程锁_PV操作.c

/* sem_mutex.c */
#include<stdio.h>
#include<pthread.h>
#include<unistd.h>
#include<semaphore.h>
void *producter_f (void *arg);
void *consumer_f(void *arg);
sem_t sem;
int running = 1;
int main(void)
{
		pthread_t consumer_t;
		pthread_t producter_t;

		sem_init(&sem,0,16);

		pthread_create(&producter_t,NULL,(void*)producter_f,NULL);
		
		pthread_create(&consumer_t,NULL,(void*)consumer_f,NULL);
		sleep(1);
		running=0;
		pthread_join(consumer_t,NULL);
		pthread_join(producter_t,NULL);
		sem_destroy(&sem);

		return 0;
}

void *producter_f(void *arg)
{
		int semval=0;
		while(running)
		{
				usleep(1);
				sem_post(&sem);
				sem_getvalue(&sem,&semval);
				printf("produce,all numb:%d\n",semval);
		}
}


void *consumer_f(void *arg)
{
		int semval=0;
		while(running)
		{
				usleep(1);
				sem_wait(&sem);
				sem_getvalue(&sem,&semval);
				printf("consumer,all numb:%d\n",semval);
		}
}