#ifndef _SEMAPHORE_H
#define _SEMAPHORE_H
#ifdef __cplusplus
extern "C" {
#endif

#include <features.h>

#define __NEED_time_t
#define __NEED_struct_timespec
#include <bits/alltypes.h>

#include <fcntl.h>

#define SEM_FAILED ((sem_t*)0)

typedef struct { volatile int __val[4 * sizeof(long) / sizeof(int)]; } sem_t;

int sem_close(sem_t*);
int sem_destroy(sem_t*);
int sem_getvalue(sem_t* __restrict, int* __restrict);
int sem_init(sem_t*, int, unsigned);
sem_t* sem_open(const char*, int, ...);
int sem_post(sem_t*);
int sem_timedwait(sem_t* __restrict, const struct timespec* __restrict);
int sem_trywait(sem_t*);
int sem_unlink(const char*);
int sem_wait(sem_t*);

#ifdef __cplusplus
}
#endif
#endif