1 /* $NetBSD: linux_futex.h,v 1.2 2005/12/11 12:20:19 christos Exp $ */
4 * SPDX-License-Identifier: BSD-4-Clause
6 * Copyright (c) 2005 Emmanuel Dreyfus, all rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Emmanuel Dreyfus
19 * 4. The name of the author may not be used to endorse or promote
20 * products derived from this software without specific prior written
23 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
25 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
38 #ifndef _LINUX_FUTEX_H
39 #define _LINUX_FUTEX_H
41 extern LIST_HEAD(futex_list, futex) futex_list;
42 extern struct mtx futex_mtx;
44 #define LINUX_FUTEX_WAIT 0
45 #define LINUX_FUTEX_WAKE 1
46 #define LINUX_FUTEX_FD 2 /* unused */
47 #define LINUX_FUTEX_REQUEUE 3
48 #define LINUX_FUTEX_CMP_REQUEUE 4
49 #define LINUX_FUTEX_WAKE_OP 5
50 #define LINUX_FUTEX_LOCK_PI 6
51 #define LINUX_FUTEX_UNLOCK_PI 7
52 #define LINUX_FUTEX_TRYLOCK_PI 8
53 #define LINUX_FUTEX_WAIT_BITSET 9
54 #define LINUX_FUTEX_WAKE_BITSET 10
55 #define LINUX_FUTEX_WAIT_REQUEUE_PI 11
56 #define LINUX_FUTEX_CMP_REQUEUE_PI 12
58 #define LINUX_FUTEX_PRIVATE_FLAG 128
59 #define LINUX_FUTEX_CLOCK_REALTIME 256
61 #define FUTEX_OP_SET 0 /* *(int *)UADDR2 = OPARG; */
62 #define FUTEX_OP_ADD 1 /* *(int *)UADDR2 += OPARG; */
63 #define FUTEX_OP_OR 2 /* *(int *)UADDR2 |= OPARG; */
64 #define FUTEX_OP_ANDN 3 /* *(int *)UADDR2 &= ~OPARG; */
65 #define FUTEX_OP_XOR 4 /* *(int *)UADDR2 ^= OPARG; */
67 #define FUTEX_OP_OPARG_SHIFT 8 /* Use (1 << OPARG) instead of OPARG. */
69 #define FUTEX_OP_CMP_EQ 0 /* if (oldval == CMPARG) wake */
70 #define FUTEX_OP_CMP_NE 1 /* if (oldval != CMPARG) wake */
71 #define FUTEX_OP_CMP_LT 2 /* if (oldval < CMPARG) wake */
72 #define FUTEX_OP_CMP_LE 3 /* if (oldval <= CMPARG) wake */
73 #define FUTEX_OP_CMP_GT 4 /* if (oldval > CMPARG) wake */
74 #define FUTEX_OP_CMP_GE 5 /* if (oldval >= CMPARG) wake */
76 #define FUTEX_WAITERS 0x80000000
77 #define FUTEX_OWNER_DIED 0x40000000
78 #define FUTEX_TID_MASK 0x3fffffff
79 #define FUTEX_BITSET_MATCH_ANY 0xffffffff
81 int futex_xchgl(int oparg, uint32_t *uaddr, int *oldval);
82 int futex_addl(int oparg, uint32_t *uaddr, int *oldval);
83 int futex_orl(int oparg, uint32_t *uaddr, int *oldval);
84 int futex_andl(int oparg, uint32_t *uaddr, int *oldval);
85 int futex_xorl(int oparg, uint32_t *uaddr, int *oldval);
86 void release_futexes(struct thread *,
87 struct linux_emuldata *);
89 #endif /* !_LINUX_FUTEX_H */