1 /*
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2022 Rob Wing
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/param.h>
29 #include <sys/lock.h>
30 #include <sys/sx.h>
31 #include <sys/event.h>
32
33 #include <sys/freebsd_event.h>
34
35 static void
knlist_sx_xlock(void * arg)36 knlist_sx_xlock(void *arg)
37 {
38
39 sx_xlock((struct sx *)arg);
40 }
41
42 static void
knlist_sx_xunlock(void * arg)43 knlist_sx_xunlock(void *arg)
44 {
45
46 sx_xunlock((struct sx *)arg);
47 }
48
49 #if __FreeBSD_version >= 1300128
50 static void
knlist_sx_assert_lock(void * arg,int what)51 knlist_sx_assert_lock(void *arg, int what)
52 {
53
54 if (what == LA_LOCKED)
55 sx_assert((struct sx *)arg, SX_LOCKED);
56 else
57 sx_assert((struct sx *)arg, SX_UNLOCKED);
58 }
59 #else
60 static void
knlist_sx_assert_locked(void * arg)61 knlist_sx_assert_locked(void *arg)
62 {
63 sx_assert((struct sx *)arg, SX_LOCKED);
64 }
65 static void
knlist_sx_assert_unlocked(void * arg)66 knlist_sx_assert_unlocked(void *arg)
67 {
68 sx_assert((struct sx *)arg, SX_UNLOCKED);
69 }
70 #endif
71
72 void
knlist_init_sx(struct knlist * knl,struct sx * lock)73 knlist_init_sx(struct knlist *knl, struct sx *lock)
74 {
75
76 #if __FreeBSD_version >= 1300128
77 knlist_init(knl, lock, knlist_sx_xlock, knlist_sx_xunlock,
78 knlist_sx_assert_lock);
79 #else
80 knlist_init(knl, lock, knlist_sx_xlock, knlist_sx_xunlock,
81 knlist_sx_assert_locked, knlist_sx_assert_unlocked);
82 #endif
83 }
84