minix3-3.4.0/include/semaphore.h

1 /* $NetBSD: semaphore.h,v 1.4 2012/03/08 21:59:28 joerg Exp $ */
2 
3 /*-
4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Christos Zoulas.
9  *
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.
18  *
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.
30  */
31 
32 #ifndef _SEMAPHORE_H_
33 #define _SEMAPHORE_H_
34 
35 /* POSIX 1003.1b semaphores */
36 
37 struct _sem_st;
38 typedef	struct _sem_st *sem_t;
39 
40 #define	SEM_FAILED	((sem_t *)0)
41 #define	SEM_VALUE_MAX	(~0U)
42 
43 #include <sys/time.h>
44 
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_timedwait(sem_t *, const struct timespec * __restrict);
52 int	 sem_trywait(sem_t *);
53 int	 sem_unlink(const char *);
54 int	 sem_wait(sem_t *);
55 sem_t	*sem_open(const char *, int, ...);
56 __END_DECLS
57 
58 #endif /* !_SEMAPHORE_H_ */