linux中的线程同步：生产者、消费者问题

#include <stdio.h>

#include <semaphore.h>

#include <unistd.h>

#include <stdlib.h>

#include <pthread.h>

#define BUFFER_COUNT 5



int Buffer[BUFFER_COUNT]; //指针数组

int front = 0;

int tail = 0;



sem_t SemProd;

sem_t SemCon;



void* productor(void *arg)

{

    int counter = 0;

    while(1)

    {

        int ret = sem_wait(&SemProd);

        sleep(2); //模拟输入处理时延

        Buffer[tail] = counter;

        

        printf("in productor: %d, %d\n", counter++, ret);

        tail = (tail + 1) % BUFFER_COUNT; //

        sem_post(&SemCon);

    }

    return NULL;

}



void* consumer(void *arg)

{

    while(1)

    {

        sem_wait(&SemCon);

        sleep(1); //模拟输出处理时延

        printf("in consumer: %d, %d\n", Buffer[front], front);

        front = (front + 1) % BUFFER_COUNT;    

        sem_post(&SemProd);

    }

}



int main(int argv, char **argc)

{

    pthread_t id1, id2;

    sem_init(&SemProd, 0, BUFFER_COUNT);

    sem_init(&SemCon, 0, 0);



    pthread_create(&id1, NULL, productor, NULL);

    pthread_create(&id2, NULL, consumer, NULL);



    pthread_join(id1, NULL);

        pthread_join(id2, NULL);

}