/*
 * Copyright 2008-2015 Haiku, Inc.
 * Distributed under the terms of the MIT License.
 */
#ifndef _SEMAPHORE_H_
#define _SEMAPHORE_H_


#include <fcntl.h>
#include <stdint.h>
#include <sys/cdefs.h>
#include <time.h>


typedef struct _sem_t {
        int32_t type;
        union {
                int32_t named_sem_id;
                int32_t unnamed_sem;
        } u;
        int32_t padding[2];
} sem_t;

#define SEM_FAILED              ((sem_t*)(long)-1)
#define SEM_VALUE_MAX   INT_MAX

__BEGIN_DECLS

sem_t*  sem_open(const char* name, int openFlags,...);
int             sem_close(sem_t* semaphore);
int             sem_unlink(const char* name);

int             sem_init(sem_t* semaphore, int shared, unsigned value);
int             sem_destroy(sem_t* semaphore);

int             sem_post(sem_t* semaphore);
int             sem_clockwait(sem_t* semaphore, clockid_t clock_id,
                        const struct timespec* abstime);
int             sem_timedwait(sem_t* semaphore, const struct timespec* abstime);
int             sem_trywait(sem_t* semaphore);
int             sem_wait(sem_t* semaphore);
int             sem_getvalue(sem_t* semaphore, int* value);

__END_DECLS


#endif  /* _SEMAPHORE_H_ */