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 #ifndef _LINUXKPI_LINUX_TIME_H_
27 #define _LINUXKPI_LINUX_TIME_H_
28
29 #define MSEC_PER_SEC 1000L
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 #include <linux/math64.h>
44
45 static inline struct timeval
ns_to_timeval(const int64_t nsec)46 ns_to_timeval(const int64_t nsec)
47 {
48 struct timeval tv;
49 long rem;
50
51 if (nsec == 0) {
52 tv.tv_sec = 0;
53 tv.tv_usec = 0;
54 return (tv);
55 }
56
57 tv.tv_sec = nsec / NSEC_PER_SEC;
58 rem = nsec % NSEC_PER_SEC;
59 if (rem < 0) {
60 tv.tv_sec--;
61 rem += NSEC_PER_SEC;
62 }
63 tv.tv_usec = rem / 1000;
64 return (tv);
65 }
66
67 static inline int64_t
timeval_to_ns(const struct timeval * tv)68 timeval_to_ns(const struct timeval *tv)
69 {
70 return ((int64_t)tv->tv_sec * NSEC_PER_SEC) +
71 tv->tv_usec * NSEC_PER_USEC;
72 }
73
74 #define getrawmonotonic(ts) nanouptime(ts)
75
76 static inline struct timespec
timespec_sub(struct timespec lhs,struct timespec rhs)77 timespec_sub(struct timespec lhs, struct timespec rhs)
78 {
79 struct timespec ts;
80
81 timespecsub(&lhs, &rhs, &ts);
82
83 return ts;
84 }
85
86 static inline void
set_normalized_timespec(struct timespec * ts,time_t sec,int64_t nsec)87 set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec)
88 {
89 /* XXX: this doesn't actually normalize anything */
90 ts->tv_sec = sec;
91 ts->tv_nsec = nsec;
92 }
93
94 static inline int64_t
timespec_to_ns(const struct timespec * ts)95 timespec_to_ns(const struct timespec *ts)
96 {
97 return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec);
98 }
99
100 static inline struct timespec
ns_to_timespec(const int64_t nsec)101 ns_to_timespec(const int64_t nsec)
102 {
103 struct timespec ts;
104 int32_t rem;
105
106 if (nsec == 0) {
107 ts.tv_sec = 0;
108 ts.tv_nsec = 0;
109 return (ts);
110 }
111
112 ts.tv_sec = nsec / NSEC_PER_SEC;
113 rem = nsec % NSEC_PER_SEC;
114 if (rem < 0) {
115 ts.tv_sec--;
116 rem += NSEC_PER_SEC;
117 }
118 ts.tv_nsec = rem;
119 return (ts);
120 }
121
122 #define ns_to_timespec64(_x) ns_to_timespec(_x)
123
124 static inline int
timespec_valid(const struct timespec * ts)125 timespec_valid(const struct timespec *ts)
126 {
127 if (ts->tv_sec < 0 || ts->tv_sec > 100000000 ||
128 ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
129 return (0);
130 return (1);
131 }
132
133 static inline unsigned long
get_seconds(void)134 get_seconds(void)
135 {
136 return time_uptime;
137 }
138
139 #endif /* _LINUXKPI_LINUX_TIME_H_ */
140