#include <pthread.h>
#include <stdlib.h>
#include <semaphore.h>
#include <stdio.h>
#include <stdio.h>
#include <unistd.h>

#define BUFFER_SIZE 10

typedef struct buffer
{
    sem_t empty;
    sem_t full;
    pthread_mutex_t mutex;
    int pos;
    int data[BUFFER_SIZE];

} buffer; 

void * produce(void *buf);
void * consume(void *buf);
void init_buffer(buffer *buf);