Producer Consumer problem implementation in cpp

Here is a simple simple implementation of producer consumer problem in cpp.
I suggest you to check this link for detailed explanation of producer consumer problem.

Compile using -lpthread flag as


g++ producer_consumer.cpp -lpthread

	#include <iostream>
	#include <pthread.h>
	#include <semaphore.h>
	#include <random>
	#include <unistd.h>

	using namespace std;

	#define BUFFER_SIZE 10

	int buffer[BUFFER_SIZE];
	int index=0;

	sem_t full,empty;
	pthread_mutex_t mutex;

	void* produce(void* arg){
	while(1){
	sleep(1);
	sem_wait(&empty);
	pthread_mutex_lock(&mutex);
	int item = rand()%100;
	buffer[index++] = item;
	cout<<"Produced "<<item<<endl;
	pthread_mutex_unlock(&mutex);
	sem_post(&full);
	}
	}

	void* consume(void* arg){
	while(1){
	sleep(1);
	sem_wait(&full);
	pthread_mutex_lock(&mutex);
	int item = buffer[--index];
	cout<<"Consumed "<<item<<endl;
	pthread_mutex_unlock(&mutex);
	sem_post(&empty);
	}
	}

	int main(){
	pthread_t producer,consumer;
	sem_init(&empty,0,BUFFER_SIZE);
	sem_init(&full,0,0);
	pthread_mutex_init(&mutex,NULL);
	pthread_create(&producer,NULL,produce,NULL);
	pthread_create(&consumer,NULL,consume,NULL);
	pthread_exit(NULL);
	}