1/*
2 * Copyright (c) 2010 David Xu <davidxu@freebsd.org>
3 *
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice unmodified, this list of conditions, and the following
11 *    disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30/* semaphore.h: POSIX 1003.1b semaphores */
31
32#ifndef _SEMAPHORE_H_
33#define _SEMAPHORE_H_
34
35#include <sys/cdefs.h>
36#include <sys/_types.h>
37#include <sys/_umtx.h>
38
39struct _sem {
40	__uint32_t	_magic;
41	struct _usem	_kern;
42};
43
44typedef	struct _sem	sem_t;
45
46#define	SEM_FAILED	((sem_t *)0)
47#define	SEM_VALUE_MAX	__INT_MAX
48
49struct timespec;
50
51__BEGIN_DECLS
52int	 sem_close(sem_t *);
53int	 sem_destroy(sem_t *);
54int	 sem_getvalue(sem_t * __restrict, int * __restrict);
55int	 sem_init(sem_t *, int, unsigned int);
56sem_t	*sem_open(const char *, int, ...);
57int	 sem_post(sem_t *);
58int	 sem_timedwait(sem_t * __restrict, const struct timespec * __restrict);
59int	 sem_trywait(sem_t *);
60int	 sem_unlink(const char *);
61int	 sem_wait(sem_t *);
62__END_DECLS
63
64#endif /* !_SEMAPHORE_H_ */
65