code/pthread/example2.h

#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);