time.h revision 302408 
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 300507 2016-05-23 13:19:20Z 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#include <sys/time.h>
36#include <sys/stdint.h>
37
38static inline struct timeval
39ns_to_timeval(const int64_t nsec)
40{
41	struct timeval tv;
42	long rem;
43
44	if (nsec == 0) {
45		tv.tv_sec = 0;
46		tv.tv_usec = 0;
47		return (tv);
48	}
49
50	tv.tv_sec = nsec / NSEC_PER_SEC;
51	rem = nsec % NSEC_PER_SEC;
52	if (rem < 0) {
53		tv.tv_sec--;
54		rem += NSEC_PER_SEC;
55	}
56	tv.tv_usec = rem / 1000;
57	return (tv);
58}
59
60static inline int64_t
61timeval_to_ns(const struct timeval *tv)
62{
63	return ((int64_t)tv->tv_sec * NSEC_PER_SEC) +
64		tv->tv_usec * NSEC_PER_USEC;
65}
66
67#define getrawmonotonic(ts)	nanouptime(ts)
68
69static inline struct timespec
70timespec_sub(struct timespec lhs, struct timespec rhs)
71{
72	struct timespec ts;
73
74	ts.tv_sec = lhs.tv_sec;
75	ts.tv_nsec = lhs.tv_nsec;
76	timespecsub(&ts, &rhs);
77
78	return ts;
79}
80
81static inline void
82set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec)
83{
84	/* XXX: this doesn't actually normalize anything */
85	ts->tv_sec = sec;
86	ts->tv_nsec = nsec;
87}
88
89static inline int64_t
90timespec_to_ns(const struct timespec *ts)
91{
92	return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec);
93}
94
95static inline struct timespec
96ns_to_timespec(const int64_t nsec)
97{
98	struct timespec ts;
99	int32_t rem;
100
101	if (nsec == 0) {
102		ts.tv_sec = 0;
103		ts.tv_nsec = 0;
104		return (ts);
105	}
106
107	ts.tv_sec = nsec / NSEC_PER_SEC;
108	rem = nsec % NSEC_PER_SEC;
109	if (rem < 0) {
110		ts.tv_sec--;
111		rem += NSEC_PER_SEC;
112	}
113	ts.tv_nsec = rem;
114	return (ts);
115}
116
117static inline int
118timespec_valid(const struct timespec *ts)
119{
120	if (ts->tv_sec < 0 || ts->tv_sec > 100000000 ||
121	    ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
122		return (0);
123	return (1);
124}
125
126static inline unsigned long
127get_seconds(void)
128{
129	return time_uptime;
130}
131
132#endif /* _LINUX_TIME_H_ */
133