FreeBSD/Linux Kernel Cross Reference
sys/posix4/ksem.h
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: releng/6.2/sys/posix4/ksem.h 145855 2005-05-04 10:39:15Z rwatson $
27 */
28
29 #ifndef _POSIX4_KSEM_H_
30 #define _POSIX4_KSEM_H_
31
32 #ifndef _KERNEL
33 #error "no user-servicable parts inside"
34 #endif
35
36 #include <sys/condvar.h>
37 #include <sys/queue.h>
38
39 struct kuser {
40 pid_t ku_pid;
41 LIST_ENTRY(kuser) ku_next;
42 };
43
44 struct ksem {
45 LIST_ENTRY(ksem) ks_entry; /* global list entry */
46 int ks_onlist; /* boolean if on a list (ks_entry) */
47 char *ks_name; /* if named, this is the name */
48 int ks_ref; /* number of references */
49 mode_t ks_mode; /* protection bits */
50 uid_t ks_uid; /* creator uid */
51 gid_t ks_gid; /* creator gid */
52 unsigned int ks_value; /* current value */
53 struct cv ks_cv; /* waiters sleep here */
54 int ks_waiters; /* number of waiters */
55 LIST_HEAD(, kuser) ks_users; /* pids using this sem */
56 struct label *ks_label; /* MAC label */
57 };
58
59 #endif /* !_POSIX4_KSEM_H_ */
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