2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2002, Jeffrey Roberson <jeff@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/_umtx.h>
37 #define UMTX_UNOWNED 0x0
38 #define UMTX_CONTESTED LONG_MIN
40 /* Common lock flags */
41 #define USYNC_PROCESS_SHARED 0x0001 /* Process shared sync objs */
44 #define UMUTEX_PRIO_INHERIT 0x0004 /* Priority inherited mutex */
45 #define UMUTEX_PRIO_PROTECT 0x0008 /* Priority protect mutex */
46 #define UMUTEX_ROBUST 0x0010 /* Robust mutex */
47 #define UMUTEX_NONCONSISTENT 0x0020 /* Robust locked but not consistent */
50 * The umutex.m_lock values and bits. The m_owner is the word which
51 * serves as the lock. Its high bit is the contention indicator and
52 * rest of bits records the owner TID. TIDs values start with PID_MAX
53 * + 2 and end by INT32_MAX. The low range [1..PID_MAX] is guaranteed
54 * to be useable as the special markers.
56 #define UMUTEX_UNOWNED 0x0
57 #define UMUTEX_CONTESTED 0x80000000U
58 #define UMUTEX_RB_OWNERDEAD (UMUTEX_CONTESTED | 0x10)
59 #define UMUTEX_RB_NOTRECOV (UMUTEX_CONTESTED | 0x11)
62 #define URWLOCK_PREFER_READER 0x0002
64 #define URWLOCK_WRITE_OWNER 0x80000000U
65 #define URWLOCK_WRITE_WAITERS 0x40000000U
66 #define URWLOCK_READ_WAITERS 0x20000000U
67 #define URWLOCK_MAX_READERS 0x1fffffffU
68 #define URWLOCK_READER_COUNT(c) ((c) & URWLOCK_MAX_READERS)
71 #define SEM_NAMED 0x0002
73 /* _usem2 count field */
74 #define USEM_HAS_WAITERS 0x80000000U
75 #define USEM_MAX_COUNT 0x7fffffffU
76 #define USEM_COUNT(c) ((c) & USEM_MAX_COUNT)
78 /* op code for _umtx_op */
79 #define UMTX_OP_LOCK 0 /* COMPAT10 */
80 #define UMTX_OP_UNLOCK 1 /* COMPAT10 */
81 #define UMTX_OP_WAIT 2
82 #define UMTX_OP_WAKE 3
83 #define UMTX_OP_MUTEX_TRYLOCK 4
84 #define UMTX_OP_MUTEX_LOCK 5
85 #define UMTX_OP_MUTEX_UNLOCK 6
86 #define UMTX_OP_SET_CEILING 7
87 #define UMTX_OP_CV_WAIT 8
88 #define UMTX_OP_CV_SIGNAL 9
89 #define UMTX_OP_CV_BROADCAST 10
90 #define UMTX_OP_WAIT_UINT 11
91 #define UMTX_OP_RW_RDLOCK 12
92 #define UMTX_OP_RW_WRLOCK 13
93 #define UMTX_OP_RW_UNLOCK 14
94 #define UMTX_OP_WAIT_UINT_PRIVATE 15
95 #define UMTX_OP_WAKE_PRIVATE 16
96 #define UMTX_OP_MUTEX_WAIT 17
97 #define UMTX_OP_MUTEX_WAKE 18 /* deprecated */
98 #define UMTX_OP_SEM_WAIT 19 /* deprecated */
99 #define UMTX_OP_SEM_WAKE 20 /* deprecated */
100 #define UMTX_OP_NWAKE_PRIVATE 21
101 #define UMTX_OP_MUTEX_WAKE2 22
102 #define UMTX_OP_SEM2_WAIT 23
103 #define UMTX_OP_SEM2_WAKE 24
104 #define UMTX_OP_SHM 25
105 #define UMTX_OP_ROBUST_LISTS 26
108 * Flags for ops; the double-underbar convention must be maintained for future
109 * additions for the sake of libsysdecode.
111 #define UMTX_OP__I386 0x40000000
112 #define UMTX_OP__32BIT 0x80000000
114 /* Flags for UMTX_OP_CV_WAIT */
115 #define CVWAIT_CHECK_UNPARKING 0x01
116 #define CVWAIT_ABSTIME 0x02
117 #define CVWAIT_CLOCKID 0x04
119 #define UMTX_ABSTIME 0x01
121 #define UMTX_CHECK_UNPARKING CVWAIT_CHECK_UNPARKING
123 /* Flags for UMTX_OP_SHM */
124 #define UMTX_SHM_CREAT 0x0001
125 #define UMTX_SHM_LOOKUP 0x0002
126 #define UMTX_SHM_DESTROY 0x0004
127 #define UMTX_SHM_ALIVE 0x0008
129 struct umtx_robust_lists_params {
130 uintptr_t robust_list_offset;
131 uintptr_t robust_priv_list_offset;
132 uintptr_t robust_inact_offset;
137 int _umtx_op(void *obj, int op, u_long val, void *uaddr, void *uaddr2);
141 #endif /* !_SYS_UMTX_H_ */