Merge from vendor branch PKGSRC:
[netbsd-mini2440.git] / include / semaphore.h
blob750db6a2e80df2014d0c0140becb36531137df79
1 /* $NetBSD: semaphore.h,v 1.2 2003/01/21 12:27:11 kleink Exp $ */
3 /*-
4 * Copyright (c) 2003 The NetBSD Foundation, Inc.
5 * All rights reserved.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 #ifndef _SEMAPHORE_H_
33 #define _SEMAPHORE_H_
35 /* POSIX 1003.1b semaphores */
37 struct _sem_st;
38 typedef struct _sem_st *sem_t;
40 #define SEM_FAILED ((sem_t *)0)
41 #define SEM_VALUE_MAX (~0U)
43 #include <sys/cdefs.h>
45 __BEGIN_DECLS
46 int sem_close(sem_t *);
47 int sem_destroy(sem_t *);
48 int sem_getvalue(sem_t * __restrict, int * __restrict);
49 int sem_init(sem_t *, int, unsigned int);
50 int sem_post(sem_t *);
51 int sem_trywait(sem_t *);
52 int sem_unlink(const char *);
53 int sem_wait(sem_t *);
54 sem_t *sem_open(const char *, int, ...);
55 __END_DECLS
57 #endif /* !_SEMAPHORE_H_ */