1 /*-
2 * Copyright (c) 1996, 1997
3 * HD Associates, Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by HD Associates, Inc
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: releng/6.2/sys/posix4/semaphore.h 125407 2004-02-03 22:27:03Z deischen $
33 */
34
35 /* semaphore.h: POSIX 1003.1b semaphores */
36
37 #ifndef _SEMAPHORE_H_
38 #define _SEMAPHORE_H_
39
40 /* Opaque type definition. */
41 struct sem;
42 typedef struct sem * sem_t;
43
44 #define SEM_FAILED ((sem_t *)0)
45 #define SEM_VALUE_MAX (~0U) /* Equivalent to UINT_MAX. */
46
47 #ifndef _KERNEL
48 #include <sys/cdefs.h>
49
50 struct timespec;
51
52 __BEGIN_DECLS
53 int sem_close(sem_t *);
54 int sem_destroy(sem_t *);
55 int sem_getvalue(sem_t * __restrict, int * __restrict);
56 int sem_init(sem_t *, int, unsigned int);
57 sem_t *sem_open(const char *, int, ...);
58 int sem_post(sem_t *);
59 int sem_timedwait(sem_t * __restrict, const struct timespec * __restrict);
60 int sem_trywait(sem_t *);
61 int sem_unlink(const char *);
62 int sem_wait(sem_t *);
63 __END_DECLS
64
65 #endif
66
67 #endif /* !_SEMAPHORE_H_ */
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