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1/* $OpenBSD: futex.h,v 1.3 2025/05/07 00:39:09 dlg Exp $ */
2
3/*
4 * Copyright (c) 2016 Martin Pieuchot
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#ifndef _SYS_FUTEX_H_
20#define _SYS_FUTEX_H_
21
22#ifndef _KERNEL
23#include <sys/cdefs.h>
24
25__BEGIN_DECLS
26int futex(volatile uint32_t *, int, int, const struct timespec *,
27 volatile uint32_t *);
28__END_DECLS
29#endif /* ! _KERNEL */
30
31#define FUTEX_OP_MASK 0x007f
32
33#define FUTEX_WAIT 1
34#define FUTEX_WAKE 2
35#define FUTEX_REQUEUE 3
36
37#define FUTEX_FLAG_MASK 0xff80
38
39#define FUTEX_PRIVATE_FLAG 0x0080
40
41#define FUTEX_WAIT_PRIVATE (FUTEX_WAIT | FUTEX_PRIVATE_FLAG)
42#define FUTEX_WAKE_PRIVATE (FUTEX_WAKE | FUTEX_PRIVATE_FLAG)
43#define FUTEX_REQUEUE_PRIVATE (FUTEX_REQUEUE | FUTEX_PRIVATE_FLAG)
44
45#endif /* _SYS_FUTEX_H_ */