Change sendfile() to use the new m_ext callback scheme for cleaning up after
[dragonfly.git] / sys / sys / semaphore.h
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1#ifndef _SEMAPHORE_H_
2#define _SEMAPHORE_H_
3
4/* semaphore.h: POSIX 1003.1b semaphores */
5
6/*-
7 * Copyright (c) 1996, 1997
8 * HD Associates, Inc. All rights reserved.
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 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by HD Associates, Inc
21 * 4. Neither the name of the author nor the names of any co-contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * $FreeBSD: src/sys/posix4/semaphore.h,v 1.6 2000/01/20 07:55:42 jasone Exp $
b1efe3b4 38 * $DragonFly: src/sys/sys/semaphore.h,v 1.3 2003/08/27 06:30:04 rob Exp $
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39 */
40
41#include <sys/_posix.h>
42#include <machine/limits.h>
43
44#ifdef _P1003_1B_INCLUDE_MAYBES
45#include <sys/types.h>
46#include <fcntl.h>
47#endif
48
49/* Opaque type definition. */
50struct sem;
51typedef struct sem *sem_t;
52
53#define SEM_FAILED ((sem_t *)0)
54#define SEM_VALUE_MAX UINT_MAX
55
56#ifndef _KERNEL
57#include <sys/cdefs.h>
58
59__BEGIN_DECLS
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60int sem_init (sem_t *, int, unsigned int);
61int sem_destroy (sem_t *);
62sem_t *sem_open (const char *, int, ...);
63int sem_close (sem_t *);
64int sem_unlink (const char *);
65int sem_wait (sem_t *);
66int sem_trywait (sem_t *);
67int sem_post (sem_t *);
68int sem_getvalue (sem_t *, int *);
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69__END_DECLS
70
71#endif
72
73#endif /* _SEMAPHORE_H_ */