1 /*-
2 * Copyright (c) 2014-2015 François 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 * $FreeBSD$
27 */
28 #ifndef _LINUXKPI_LINUX_TIME_H_
29 #define _LINUXKPI_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 #define timespec64 timespec
39
40 #include <sys/time.h>
41 #include <sys/stdint.h>
42
43 static inline struct timeval
ns_to_timeval(const int64_t nsec)44 ns_to_timeval(const int64_t nsec)
45 {
46 struct timeval tv;
47 long rem;
48
49 if (nsec == 0) {
50 tv.tv_sec = 0;
51 tv.tv_usec = 0;
52 return (tv);
53 }
54
55 tv.tv_sec = nsec / NSEC_PER_SEC;
56 rem = nsec % NSEC_PER_SEC;
57 if (rem < 0) {
58 tv.tv_sec--;
59 rem += NSEC_PER_SEC;
60 }
61 tv.tv_usec = rem / 1000;
62 return (tv);
63 }
64
65 static inline int64_t
timeval_to_ns(const struct timeval * tv)66 timeval_to_ns(const struct timeval *tv)
67 {
68 return ((int64_t)tv->tv_sec * NSEC_PER_SEC) +
69 tv->tv_usec * NSEC_PER_USEC;
70 }
71
72 #define getrawmonotonic(ts) nanouptime(ts)
73
74 static inline struct timespec
timespec_sub(struct timespec lhs,struct timespec rhs)75 timespec_sub(struct timespec lhs, struct timespec rhs)
76 {
77 struct timespec ts;
78
79 timespecsub(&lhs, &rhs, &ts);
80
81 return ts;
82 }
83
84 static inline void
set_normalized_timespec(struct timespec * ts,time_t sec,int64_t nsec)85 set_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
92 static inline int64_t
timespec_to_ns(const struct timespec * ts)93 timespec_to_ns(const struct timespec *ts)
94 {
95 return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec);
96 }
97
98 static inline struct timespec
ns_to_timespec(const int64_t nsec)99 ns_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
120 static inline int
timespec_valid(const struct timespec * ts)121 timespec_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
129 static inline unsigned long
get_seconds(void)130 get_seconds(void)
131 {
132 return time_uptime;
133 }
134
135 #endif /* _LINUXKPI_LINUX_TIME_H_ */
136