1/* $NetBSD: linux_futex.h,v 1.7 2013/04/16 23:03:05 christos Exp $ */
2
3/*-
4 * Copyright (c) 2005 Emmanuel Dreyfus, all rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Emmanuel Dreyfus
17 * 4. The name of the author may not be used to endorse or promote
18 * products derived from this software without specific prior written
19 * permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#ifndef _LINUX_FUTEX_H
35#define _LINUX_FUTEX_H
36
37#define LINUX_FUTEX_WAIT 0
38#define LINUX_FUTEX_WAKE 1
39#define LINUX_FUTEX_FD 2
40#define LINUX_FUTEX_REQUEUE 3
41#define LINUX_FUTEX_CMP_REQUEUE 4
42#define LINUX_FUTEX_WAKE_OP 5
43#define LINUX_FUTEX_LOCK_PI 6
44#define LINUX_FUTEX_UNLOCK_PI 7
45#define LINUX_FUTEX_TRYLOCK_PI 8
46#define LINUX_FUTEX_WAIT_BITSET 9
47#define LINUX_FUTEX_WAKE_BITSET 10
48#define LINUX_FUTEX_WAIT_REQUEUE_PI 11
49#define LINUX_FUTEX_CMP_REQUEUE_PI 12
50
51#define LINUX_FUTEX_PRIVATE_FLAG 128
52#define LINUX_FUTEX_CLOCK_REALTIME 256
53#define LINUX_FUTEX_CMD_MASK \
54 (~(LINUX_FUTEX_PRIVATE_FLAG|LINUX_FUTEX_CLOCK_REALTIME))
55
56#define FUTEX_OP_SET 0
57#define FUTEX_OP_ADD 1
58#define FUTEX_OP_OR 2
59#define FUTEX_OP_ANDN 3
60#define FUTEX_OP_XOR 4
61#define FUTEX_OP_OPARG_SHIFT 8
62
63#define FUTEX_OP_CMP_EQ 0
64#define FUTEX_OP_CMP_NE 1
65#define FUTEX_OP_CMP_LT 2
66#define FUTEX_OP_CMP_LE 3
67#define FUTEX_OP_CMP_GT 4
68#define FUTEX_OP_CMP_GE 5
69
70struct linux_robust_list {
71 struct linux_robust_list *next;
72};
73
74struct linux_robust_list_head {
75 struct linux_robust_list list;
76 unsigned long futex_offset;
77 struct linux_robust_list *pending_list;
78};
79
80#define FUTEX_WAITERS 0x80000000
81#define FUTEX_OWNER_DIED 0x40000000
82#define FUTEX_TID_MASK 0x3fffffff
83
84#define FUTEX_BITSET_MATCH_ANY 0xffffffff
85
86void release_futexes(struct lwp *);
87struct linux_sys_futex_args;
88int linux_do_futex(struct lwp *, const struct linux_sys_futex_args *,
89 register_t *, struct timespec *);
90void linux_futex_init(void);
91void linux_futex_fini(void);
92
93#endif /* !_LINUX_FUTEX_H */
94