1/*	$NetBSD: timerfd.h,v 1.3 2021/09/21 13:51:46 ryoon Exp $	*/
 2
 3/*-
 4 * Copyright (c) 2020 The NetBSD Foundation, Inc.
 5 * All rights reserved.
 6 *
 7 * This code is derived from software contributed to The NetBSD Foundation
 8 * by Jason R. Thorpe.
 9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _SYS_TIMERFD_H_
33#define	_SYS_TIMERFD_H_
34
35#include <sys/fcntl.h>
36#include <sys/ioccom.h>
37#include <sys/time.h>
38
39/*
40 * Definitions for timerfd_create(2) / timerfd_gettime(2) / timerfd_settime(2).
41 * This implementation is API compatible with the Linux interface.
42 */
43
44#define	TFD_TIMER_ABSTIME	O_WRONLY
45#define	TFD_TIMER_CANCEL_ON_SET	O_RDWR
46#define	TFD_CLOEXEC		O_CLOEXEC
47#define	TFD_NONBLOCK		O_NONBLOCK
48
49#define	TFD_IOC_SET_TICKS	_IOW('T', 0, uint64_t)
50
51#ifdef _KERNEL
52struct lwp;
53int	do_timerfd_create(struct lwp *, clockid_t, int, register_t *);
54int	do_timerfd_gettime(struct lwp *, int, struct itimerspec *,
55	    register_t *);
56int	do_timerfd_settime(struct lwp *, int, int, const struct itimerspec *,
57	    struct itimerspec *, register_t *);
58#else /* ! _KERNEL */
59__BEGIN_DECLS
60int	timerfd_create(clockid_t, int);
61int	timerfd_gettime(int, struct itimerspec *);
62int	timerfd_settime(int, int, const struct itimerspec *,
63	    struct itimerspec *);
64__END_DECLS
65#endif /* _KERNEL */
66
67#endif /* _SYS_TIMERFD_H_ */