1/*	$OpenBSD: semaphore.h,v 1.1 2017/10/15 23:40:33 guenther Exp $	*/
2
3/* semaphore.h: POSIX 1003.1b semaphores */
4
5/*-
6 * Copyright (c) 1996, 1997
7 *	HD Associates, Inc.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by HD Associates, Inc
20 * 4. Neither the name of the author nor the names of any co-contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef _SEMAPHORE_H_
38#define _SEMAPHORE_H_
39
40#include <sys/cdefs.h>
41
42/* Opaque type definition. */
43struct __sem;
44typedef struct __sem *sem_t;
45struct timespec;
46
47#define SEM_FAILED      ((sem_t *)0)
48
49__BEGIN_DECLS
50int	sem_init(sem_t *, int, unsigned int);
51int	sem_destroy(sem_t *);
52sem_t  *sem_open(const char *, int, ...);
53int	sem_close(sem_t *);
54int	sem_unlink(const char *);
55int	sem_wait(sem_t *);
56int	sem_timedwait(sem_t * __restrict, const struct timespec * __restrict);
57int	sem_trywait(sem_t *);
58int	sem_post(sem_t *);
59int	sem_getvalue(sem_t * __restrict, int * __restrict);
60__END_DECLS
61
62#endif /* _SEMAPHORE_H_ */
63