1 /* $NetBSD: time.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _LINUX_TIME_H_
33 #define _LINUX_TIME_H_
34
35 #include <sys/time.h>
36
37 /*
38 * XXX get_seconds as implemented by Linux is a Y2038 bug waiting to
39 * happen on 32-bit systems because it returns unsigned long. Some
40 * callers in Linux (implicitly) convert the result to time_t, though.
41 * We'll pretend get_seconds returns time_t and make sure all our
42 * callers treat it as if it did.
43 */
44
45 static inline time_t
get_seconds(void)46 get_seconds(void)
47 {
48 return time_second;
49 }
50
51 static inline void
getrawmonotonic(struct timespec * ts)52 getrawmonotonic(struct timespec *ts)
53 {
54 getnanouptime(ts);
55 }
56
57 static inline void
do_gettimeofday(struct timeval * tv)58 do_gettimeofday(struct timeval *tv)
59 {
60 microtime(tv);
61 }
62
63 static inline bool
timespec_valid(const struct timespec * ts)64 timespec_valid(const struct timespec *ts)
65 {
66 if (ts->tv_sec < 0)
67 return false;
68 if (1000000000L <= ts->tv_nsec)
69 return false;
70 return true;
71 }
72
73 static inline struct timespec
ns_to_timespec(const int64_t nsec)74 ns_to_timespec(const int64_t nsec)
75 {
76 struct timespec ts;
77
78 ts.tv_sec = (nsec / 1000000000L);
79 ts.tv_nsec = (nsec % 1000000000L);
80 if (ts.tv_nsec < 0) {
81 ts.tv_sec -= 1;
82 ts.tv_nsec += 1000000000L;
83 }
84
85 return ts;
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 (((int64_t)ts->tv_sec * 1000000000LL) + ts->tv_nsec);
92 }
93
94 static inline struct timeval
ns_to_timeval(int64_t nsec)95 ns_to_timeval(int64_t nsec)
96 {
97 struct timespec ts;
98 struct timeval tv;
99
100 ts = ns_to_timespec(nsec);
101 TIMESPEC_TO_TIMEVAL(&tv, &ts);
102
103 return tv;
104 }
105
106 static inline int64_t
timeval_to_ns(struct timeval * tv)107 timeval_to_ns(struct timeval *tv)
108 {
109 return (((int64_t)tv->tv_sec * 1000000000UL) + (tv->tv_usec * 1000ul));
110 }
111
112 static inline struct timespec
timespec_sub(struct timespec a,struct timespec b)113 timespec_sub(struct timespec a, struct timespec b)
114 {
115 struct timespec d;
116
117 timespecsub(&a, &b, &d);
118
119 return d;
120 }
121
122 static inline void
set_normalized_timespec(struct timespec * ts,time_t sec,int64_t nsec)123 set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec)
124 {
125 while (nsec >= 1000000000L) {
126 nsec -= 1000000000L;
127 sec += 1;
128 }
129 while (nsec < 0) {
130 nsec += 1000000000L;
131 sec -= 1;
132 }
133 ts->tv_sec = sec;
134 ts->tv_nsec = nsec;
135 }
136
137 #endif /* _LINUX_TIME_H_ */
138