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 typedef int64_t time64_t;
46
47 static inline struct timeval
ns_to_timeval(const int64_t nsec)48 ns_to_timeval(const int64_t nsec)
49 {
50 struct timeval tv;
51 long rem;
52
53 if (nsec == 0) {
54 tv.tv_sec = 0;
55 tv.tv_usec = 0;
56 return (tv);
57 }
58
59 tv.tv_sec = nsec / NSEC_PER_SEC;
60 rem = nsec % NSEC_PER_SEC;
61 if (rem < 0) {
62 tv.tv_sec--;
63 rem += NSEC_PER_SEC;
64 }
65 tv.tv_usec = rem / 1000;
66 return (tv);
67 }
68
69 static inline int64_t
timeval_to_ns(const struct timeval * tv)70 timeval_to_ns(const struct timeval *tv)
71 {
72 return ((int64_t)tv->tv_sec * NSEC_PER_SEC) +
73 tv->tv_usec * NSEC_PER_USEC;
74 }
75
76 #define getrawmonotonic(ts) nanouptime(ts)
77
78 static inline struct timespec
timespec_sub(struct timespec lhs,struct timespec rhs)79 timespec_sub(struct timespec lhs, struct timespec rhs)
80 {
81 struct timespec ts;
82
83 timespecsub(&lhs, &rhs, &ts);
84
85 return ts;
86 }
87
88 static inline void
set_normalized_timespec(struct timespec * ts,time_t sec,int64_t nsec)89 set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec)
90 {
91 /* XXX: this doesn't actually normalize anything */
92 ts->tv_sec = sec;
93 ts->tv_nsec = nsec;
94 }
95
96 static inline int64_t
timespec_to_ns(const struct timespec * ts)97 timespec_to_ns(const struct timespec *ts)
98 {
99 return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec);
100 }
101
102 static inline struct timespec
ns_to_timespec(const int64_t nsec)103 ns_to_timespec(const int64_t nsec)
104 {
105 struct timespec ts;
106 int32_t rem;
107
108 if (nsec == 0) {
109 ts.tv_sec = 0;
110 ts.tv_nsec = 0;
111 return (ts);
112 }
113
114 ts.tv_sec = nsec / NSEC_PER_SEC;
115 rem = nsec % NSEC_PER_SEC;
116 if (rem < 0) {
117 ts.tv_sec--;
118 rem += NSEC_PER_SEC;
119 }
120 ts.tv_nsec = rem;
121 return (ts);
122 }
123
124 #define ns_to_timespec64(_x) ns_to_timespec(_x)
125
126 static inline int
timespec_valid(const struct timespec * ts)127 timespec_valid(const struct timespec *ts)
128 {
129 if (ts->tv_sec < 0 || ts->tv_sec > 100000000 ||
130 ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
131 return (0);
132 return (1);
133 }
134
135 static inline unsigned long
get_seconds(void)136 get_seconds(void)
137 {
138 return time_uptime;
139 }
140
141 #endif /* _LINUXKPI_LINUX_TIME_H_ */
142