#ifndef _SEM_H_
#define _SEM_H_

#define _SVID_SOURCE

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>

union semun
{
        int val;
        struct semid_ds *buf;
        ushort *array;
} arg;

void P(int semID);
void V(int semID);
int sem_create(int key);
void sem_delete(int semID);
int sem_open(int key);
int sem_read(int semID);

#endif