1/*-
2 * Copyright (c) 2002 Alfred Perlstein <alfred@FreeBSD.org>
3 * 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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#ifndef _POSIX4_KSEM_H_
30#define	_POSIX4_KSEM_H_
31
32#if !defined(_KERNEL) && !defined(_WANT_FILE)
33#error "no user-servicable parts inside"
34#endif
35
36#include <sys/condvar.h>
37
38struct ksem {
39	int		ks_ref;		/* number of references */
40	mode_t		ks_mode;	/* protection bits */
41	uid_t		ks_uid;		/* creator uid */
42	gid_t		ks_gid;		/* creator gid */
43	unsigned int	ks_value;	/* current value */
44	struct cv	ks_cv;		/* waiters sleep here */
45	int		ks_waiters;	/* number of waiters */
46	int		ks_flags;
47
48	/*
49	 * Values maintained solely to make this a better-behaved file
50	 * descriptor for fstat() to run on.
51	 *
52	 * XXX: dubious
53	 */
54	struct timespec	ks_atime;
55	struct timespec	ks_mtime;
56	struct timespec	ks_ctime;
57	struct timespec	ks_birthtime;
58
59	struct label	*ks_label;	/* MAC label */
60	const char	*ks_path;
61};
62
63#define	KS_ANONYMOUS	0x0001		/* Anonymous (unnamed) semaphore. */
64#define	KS_DEAD		0x0002		/* No new waiters allowed. */
65
66#ifdef _KERNEL
67extern void	(*ksem_info)(struct ksem *ks, char *path, size_t size,
68		    uint32_t *value);
69#endif
70
71#endif /* !_POSIX4_KSEM_H_ */
72