1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2002 Alfred Perlstein <alfred@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#ifndef _POSIX4_KSEM_H_
30#define _POSIX4_KSEM_H_
31
32#if !defined(_KERNEL) && !defined(_WANT_FILE)
33#error "no user-serviceable 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#endif /* !_POSIX4_KSEM_H_ */