2 * Copyright (c) 2005 David Xu <davidxu@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 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
29 #ifndef _THR_FBSD_UMTX_H_
30 #define _THR_FBSD_UMTX_H_
35 #define DEFAULT_UMUTEX {0,0, {0,0},{0,0,0,0}}
37 int __thr_umutex_lock(struct umutex *mtx) __hidden;
38 int __thr_umutex_timedlock(struct umutex *mtx,
39 const struct timespec *timeout) __hidden;
40 int __thr_umutex_unlock(struct umutex *mtx) __hidden;
41 int __thr_umutex_trylock(struct umutex *mtx) __hidden;
42 int __thr_umutex_set_ceiling(struct umutex *mtx, uint32_t ceiling,
43 uint32_t *oldceiling) __hidden;
45 void _thr_umutex_init(struct umutex *mtx) __hidden;
46 int _thr_umtx_wait(volatile long *mtx, long exp,
47 const struct timespec *timeout) __hidden;
48 int _thr_umtx_wait_uint(volatile u_int *mtx, u_int exp,
49 const struct timespec *timeout) __hidden;
50 int _thr_umtx_wake(volatile void *mtx, int count) __hidden;
51 int _thr_ucond_wait(struct ucond *cv, struct umutex *m,
52 const struct timespec *timeout, int check_unpaking) __hidden;
53 void _thr_ucond_init(struct ucond *cv) __hidden;
54 int _thr_ucond_signal(struct ucond *cv) __hidden;
55 int _thr_ucond_broadcast(struct ucond *cv) __hidden;
58 _thr_umutex_trylock(struct umutex *mtx, uint32_t id)
60 if (atomic_cmpset_acq_32(&mtx->m_owner, UMUTEX_UNOWNED, id))
62 if ((mtx->m_flags & UMUTEX_PRIO_PROTECT) == 0)
64 return (__thr_umutex_trylock(mtx));
68 _thr_umutex_trylock2(struct umutex *mtx, uint32_t id)
70 if (atomic_cmpset_acq_32(&mtx->m_owner, UMUTEX_UNOWNED, id))
76 _thr_umutex_lock(struct umutex *mtx, uint32_t id)
78 if (atomic_cmpset_acq_32(&mtx->m_owner, UMUTEX_UNOWNED, id))
80 return (__thr_umutex_lock(mtx));
84 _thr_umutex_timedlock(struct umutex *mtx, uint32_t id,
85 const struct timespec *timeout)
87 if (atomic_cmpset_acq_32(&mtx->m_owner, UMUTEX_UNOWNED, id))
89 return (__thr_umutex_timedlock(mtx, timeout));
93 _thr_umutex_unlock(struct umutex *mtx, uint32_t id)
95 if (atomic_cmpset_rel_32(&mtx->m_owner, id, UMUTEX_UNOWNED))
97 return (__thr_umutex_unlock(mtx));