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
28 #ifndef _THR_DFLY_UMTX_H_
29 #define _THR_DFLY_UMTX_H_
34 #define UMTX_CONTESTED 2
38 int __thr_umtx_lock(volatile umtx_t *mtx, int id, int timo);
39 int __thr_umtx_timedlock(volatile umtx_t *mtx, int id,
40 const struct timespec *timeout);
41 void __thr_umtx_unlock(volatile umtx_t *mtx, int id);
44 _thr_umtx_init(volatile umtx_t *mtx)
50 _thr_umtx_trylock(volatile umtx_t *mtx, int id)
52 if (atomic_cmpset_acq_int(mtx, 0, id)) {
59 _thr_umtx_lock(volatile umtx_t *mtx, int id)
61 if (atomic_cmpset_acq_int(mtx, 0, id)) {
64 return (__thr_umtx_lock(mtx, id, 0));
68 _thr_umtx_timedlock(volatile umtx_t *mtx, int id,
69 const struct timespec *timeout)
71 if (atomic_cmpset_acq_int(mtx, 0, id)) {
74 return (__thr_umtx_timedlock(mtx, id, timeout));
78 _thr_umtx_unlock(volatile umtx_t *mtx, int id)
80 if (atomic_cmpset_acq_int(mtx, id, 0)) {
83 __thr_umtx_unlock(mtx, id);
86 int _thr_umtx_wait(volatile umtx_t *mtx, umtx_t exp,
87 const struct timespec *timeout, int clockid);
88 int _thr_umtx_wait_intr(volatile umtx_t *mtx, umtx_t exp);
89 void _thr_umtx_wake(volatile umtx_t *mtx, int count);