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 _LINUX_TIME_H_
29 #define _LINUX_TIME_H_
30
31 #define NSEC_PER_USEC 1000L
32 #define NSEC_PER_SEC 1000000000L
33
34 #include <sys/time.h>
35 #include <sys/stdint.h>
36
37 static inline struct timeval
ns_to_timeval(const int64_t nsec)38 ns_to_timeval(const int64_t nsec)
39 {
40 struct timeval tv;
41 long rem;
42
43 if (nsec == 0) {
44 tv.tv_sec = 0;
45 tv.tv_usec = 0;
46 return (tv);
47 }
48
49 tv.tv_sec = nsec / NSEC_PER_SEC;
50 rem = nsec % NSEC_PER_SEC;
51 if (rem < 0) {
52 tv.tv_sec--;
53 rem += NSEC_PER_SEC;
54 }
55 tv.tv_usec = rem / 1000;
56 return (tv);
57 }
58
59 static inline int64_t
timeval_to_ns(const struct timeval * tv)60 timeval_to_ns(const struct timeval *tv)
61 {
62 return ((int64_t)tv->tv_sec * NSEC_PER_SEC) +
63 tv->tv_usec * NSEC_PER_USEC;
64 }
65
66 #define getrawmonotonic(ts) nanouptime(ts)
67
68 static inline struct timespec
timespec_sub(struct timespec lhs,struct timespec rhs)69 timespec_sub(struct timespec lhs, struct timespec rhs)
70 {
71 struct timespec ts;
72
73 ts.tv_sec = lhs.tv_sec;
74 ts.tv_nsec = lhs.tv_nsec;
75 timespecsub(&ts, &rhs);
76
77 return ts;
78 }
79
80 static inline void
set_normalized_timespec(struct timespec * ts,time_t sec,int64_t nsec)81 set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec)
82 {
83 /* XXX: this doesn't actually normalize anything */
84 ts->tv_sec = sec;
85 ts->tv_nsec = nsec;
86 }
87
88 static inline int64_t
timespec_to_ns(const struct timespec * ts)89 timespec_to_ns(const struct timespec *ts)
90 {
91 return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec);
92 }
93
94 static inline struct timespec
ns_to_timespec(const int64_t nsec)95 ns_to_timespec(const int64_t nsec)
96 {
97 struct timespec ts;
98 int32_t rem;
99
100 if (nsec == 0) {
101 ts.tv_sec = 0;
102 ts.tv_nsec = 0;
103 return (ts);
104 }
105
106 ts.tv_sec = nsec / NSEC_PER_SEC;
107 rem = nsec % NSEC_PER_SEC;
108 if (rem < 0) {
109 ts.tv_sec--;
110 rem += NSEC_PER_SEC;
111 }
112 ts.tv_nsec = rem;
113 return (ts);
114 }
115
116 static inline int
timespec_valid(const struct timespec * ts)117 timespec_valid(const struct timespec *ts)
118 {
119 if (ts->tv_sec < 0 || ts->tv_sec > 100000000 ||
120 ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
121 return (0);
122 return (1);
123 }
124
125 static inline unsigned long
get_seconds(void)126 get_seconds(void)
127 {
128 return time_uptime;
129 }
130
131 #endif /* _LINUX_TIME_H_ */
132