/*
 * Copyright (c) 2021-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _ADAPT_SEMAPHORE_H
#define _ADAPT_SEMAPHORE_H

#include <sys/features.h>
#include <time.h>
#include <fcntl.h>

#ifdef __cplusplus
extern "C" {
#endif

#define SEM_FAILED ((sem_t *)0)
#define __SEM_NUM    4

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

int    sem_init(sem_t *sem, int shared, unsigned value);
int    sem_destroy(sem_t *sem);
int    sem_wait(sem_t *sem);
int    sem_post(sem_t *sem);
int    sem_timedwait(sem_t *__restrict sem, const struct timespec *__restrict timeout);
int    sem_getvalue(sem_t *__restrict sem, int *__restrict currVal);

#ifdef __cplusplus
}
#endif

#endif /* !_ADAPT_SEMAPHORE_H */
