2 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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
29 #ifndef _OPENSOLARIS_SYS_MUTEX_H_
30 #define _OPENSOLARIS_SYS_MUTEX_H_
34 #include <sys/param.h>
36 #include_next <sys/mutex.h>
41 MUTEX_DEFAULT = 6 /* kernel default mutex */
44 #define MUTEX_HELD(x) (mutex_owned(x))
45 #define MUTEX_NOT_HELD(x) (!mutex_owned(x) || panicstr)
47 typedef struct sx kmutex_t;
49 #ifndef OPENSOLARIS_WITNESS
50 #define MUTEX_FLAGS (SX_DUPOK | SX_NOWITNESS)
52 #define MUTEX_FLAGS (SX_DUPOK)
55 #define mutex_init(lock, desc, type, arg) do { \
57 ASSERT((type) == 0 || (type) == MUTEX_DEFAULT); \
58 KASSERT(((lock)->lock_object.lo_flags & LO_ALLMASK) != \
59 LO_EXPECTED, ("lock %s already initialized", #lock)); \
60 bzero((lock), sizeof(struct sx)); \
61 for (_name = #lock; *_name != '\0'; _name++) { \
62 if (*_name >= 'a' && *_name <= 'z') \
67 sx_init_flags((lock), _name, MUTEX_FLAGS); \
69 #define mutex_destroy(lock) sx_destroy(lock)
70 #define mutex_enter(lock) sx_xlock(lock)
71 #define mutex_tryenter(lock) sx_try_xlock(lock)
72 #define mutex_exit(lock) sx_xunlock(lock)
73 #define mutex_owned(lock) sx_xlocked(lock)
74 #define mutex_owner(lock) sx_xholder(lock)
78 #endif /* _OPENSOLARIS_SYS_MUTEX_H_ */