time.h revision 333323 
1/*-
2 * Copyright (c) 2014-2015 Fran��ois Tigeot
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice unmodified, this list of conditions, and the following
10 *    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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/11/sys/compat/linuxkpi/common/include/linux/time.h 333323 2018-05-07 15:07:26Z hselasky $
27 */
28#ifndef _LINUX_TIME_H_
29#define	_LINUX_TIME_H_
30
31#define	NSEC_PER_USEC	1000L
32#define	NSEC_PER_MSEC	1000000L
33#define	NSEC_PER_SEC	1000000000L
34
35#define	USEC_PER_MSEC	1000L
36#define	USEC_PER_SEC	1000000L
37
38#include <sys/time.h>
39#include <sys/stdint.h>
40
41static inline struct timeval
42ns_to_timeval(const int64_t nsec)
43{
44	struct timeval tv;
45	long rem;
46
47	if (nsec == 0) {
48		tv.tv_sec = 0;
49		tv.tv_usec = 0;
50		return (tv);
51	}
52
53	tv.tv_sec = nsec / NSEC_PER_SEC;
54	rem = nsec % NSEC_PER_SEC;
55	if (rem < 0) {
56		tv.tv_sec--;
57		rem += NSEC_PER_SEC;
58	}
59	tv.tv_usec = rem / 1000;
60	return (tv);
61}
62
63static inline int64_t
64timeval_to_ns(const struct timeval *tv)
65{
66	return ((int64_t)tv->tv_sec * NSEC_PER_SEC) +
67		tv->tv_usec * NSEC_PER_USEC;
68}
69
70#define getrawmonotonic(ts)	nanouptime(ts)
71
72static inline struct timespec
73timespec_sub(struct timespec lhs, struct timespec rhs)
74{
75	struct timespec ts;
76
77	ts.tv_sec = lhs.tv_sec;
78	ts.tv_nsec = lhs.tv_nsec;
79	timespecsub(&ts, &rhs);
80
81	return ts;
82}
83
84static inline void
85set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec)
86{
87	/* XXX: this doesn't actually normalize anything */
88	ts->tv_sec = sec;
89	ts->tv_nsec = nsec;
90}
91
92static inline int64_t
93timespec_to_ns(const struct timespec *ts)
94{
95	return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec);
96}
97
98static inline struct timespec
99ns_to_timespec(const int64_t nsec)
100{
101	struct timespec ts;
102	int32_t rem;
103
104	if (nsec == 0) {
105		ts.tv_sec = 0;
106		ts.tv_nsec = 0;
107		return (ts);
108	}
109
110	ts.tv_sec = nsec / NSEC_PER_SEC;
111	rem = nsec % NSEC_PER_SEC;
112	if (rem < 0) {
113		ts.tv_sec--;
114		rem += NSEC_PER_SEC;
115	}
116	ts.tv_nsec = rem;
117	return (ts);
118}
119
120static inline int
121timespec_valid(const struct timespec *ts)
122{
123	if (ts->tv_sec < 0 || ts->tv_sec > 100000000 ||
124	    ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
125		return (0);
126	return (1);
127}
128
129static inline unsigned long
130get_seconds(void)
131{
132	return time_uptime;
133}
134
135#endif /* _LINUX_TIME_H_ */
136