2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2010, David Xu <davidxu@freebsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/_types.h>
36 #include <sys/_timespec.h>
39 volatile __lwpid_t m_owner; /* Owner of the mutex */
40 __uint32_t m_flags; /* Flags of the mutex */
41 __uint32_t m_ceilings[2]; /* Priority protect ceiling */
42 __uintptr_t m_rb_lnk; /* Robust linkage */
46 __uint32_t m_spare[2];
50 volatile __uint32_t c_has_waiters; /* Has waiters in kernel */
51 __uint32_t c_flags; /* Flags of the condition variable */
52 __uint32_t c_clockid; /* Clock id */
53 __uint32_t c_spare[1]; /* Spare space */
57 volatile __int32_t rw_state;
59 __uint32_t rw_blocked_readers;
60 __uint32_t rw_blocked_writers;
61 __uint32_t rw_spare[4];
65 volatile __uint32_t _has_waiters;
66 volatile __uint32_t _count;
71 volatile __uint32_t _count; /* Waiters flag in high bit. */
76 struct timespec _timeout;
81 #endif /* !_SYS__UMTX_H_ */