2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)time.h 8.5 (Berkeley) 5/4/95
34 * $FreeBSD: src/sys/sys/time.h,v 1.42 1999/12/29 04:24:48 peter Exp $
35 * $DragonFly: src/sys/sys/time.h,v 1.10 2004/11/20 20:25:13 dillon Exp $
42 #include <sys/types.h>
46 * Structure returned by gettimeofday(2) system call,
47 * and used in other calls.
50 long tv_sec; /* seconds */
51 long tv_usec; /* and microseconds */
54 #ifndef _TIMESPEC_DECLARED
55 #define _TIMESPEC_DECLARED
57 time_t tv_sec; /* seconds */
58 long tv_nsec; /* and nanoseconds */
62 #define TIMEVAL_TO_TIMESPEC(tv, ts) \
64 (ts)->tv_sec = (tv)->tv_sec; \
65 (ts)->tv_nsec = (tv)->tv_usec * 1000; \
67 #define TIMESPEC_TO_TIMEVAL(tv, ts) \
69 (tv)->tv_sec = (ts)->tv_sec; \
70 (tv)->tv_usec = (ts)->tv_nsec / 1000; \
74 int tz_minuteswest; /* minutes west of Greenwich */
75 int tz_dsttime; /* type of dst correction */
77 #define DST_NONE 0 /* not on dst */
78 #define DST_USA 1 /* USA style dst */
79 #define DST_AUST 2 /* Australian style dst */
80 #define DST_WET 3 /* Western European dst */
81 #define DST_MET 4 /* Middle European dst */
82 #define DST_EET 5 /* Eastern European dst */
83 #define DST_CAN 6 /* Canada */
87 /* Operations on timespecs */
88 #define timespecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
89 #define timespecisset(tvp) ((tvp)->tv_sec || (tvp)->tv_nsec)
90 #define timespeccmp(tvp, uvp, cmp) \
91 (((tvp)->tv_sec == (uvp)->tv_sec) ? \
92 ((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
93 ((tvp)->tv_sec cmp (uvp)->tv_sec))
94 #define timespecadd(vvp, uvp) \
96 (vvp)->tv_sec += (uvp)->tv_sec; \
97 (vvp)->tv_nsec += (uvp)->tv_nsec; \
98 if ((vvp)->tv_nsec >= 1000000000) { \
100 (vvp)->tv_nsec -= 1000000000; \
103 #define timespecsub(vvp, uvp) \
105 (vvp)->tv_sec -= (uvp)->tv_sec; \
106 (vvp)->tv_nsec -= (uvp)->tv_nsec; \
107 if ((vvp)->tv_nsec < 0) { \
109 (vvp)->tv_nsec += 1000000000; \
113 /* Operations on timevals. */
115 #define timevalclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
116 #define timevalisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
117 #define timevalcmp(tvp, uvp, cmp) \
118 (((tvp)->tv_sec == (uvp)->tv_sec) ? \
119 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
120 ((tvp)->tv_sec cmp (uvp)->tv_sec))
122 /* timevaladd and timevalsub are not inlined */
126 #ifndef _KERNEL /* NetBSD/OpenBSD compatible interfaces */
128 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
129 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
130 #define timercmp(tvp, uvp, cmp) \
131 (((tvp)->tv_sec == (uvp)->tv_sec) ? \
132 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
133 ((tvp)->tv_sec cmp (uvp)->tv_sec))
134 #define timeradd(tvp, uvp, vvp) \
136 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
137 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
138 if ((vvp)->tv_usec >= 1000000) { \
140 (vvp)->tv_usec -= 1000000; \
143 #define timersub(tvp, uvp, vvp) \
145 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
146 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
147 if ((vvp)->tv_usec < 0) { \
149 (vvp)->tv_usec += 1000000; \
155 * Names of the interval timers, and structure
156 * defining a timer setting.
158 #define ITIMER_REAL 0
159 #define ITIMER_VIRTUAL 1
160 #define ITIMER_PROF 2
163 struct timeval it_interval; /* timer interval */
164 struct timeval it_value; /* current value */
168 * Getkerninfo clock information structure
171 int hz; /* clock frequency */
172 int tick; /* micro-seconds per hz tick */
173 int tickadj; /* clock skew rate for adjtime() */
174 int stathz; /* statistics clock frequency */
175 int profhz; /* profiling clock frequency */
178 /* CLOCK_REALTIME and TIMER_ABSTIME are supposed to be in time.h */
180 #ifndef CLOCK_REALTIME
181 #define CLOCK_REALTIME 0
183 #define CLOCK_VIRTUAL 1
186 #define TIMER_RELTIME 0x0 /* relative timer */
187 #ifndef TIMER_ABSTIME
188 #define TIMER_ABSTIME 0x1 /* absolute timer */
192 extern time_t time_second;
194 void initclocks_pcpu(void);
195 void getmicrouptime (struct timeval *tv);
196 void getmicrotime (struct timeval *tv);
197 void getnanouptime (struct timespec *tv);
198 void getnanotime (struct timespec *tv);
199 int itimerdecr (struct itimerval *itp, int usec);
200 int itimerfix (struct timeval *tv);
201 int ppsratecheck (struct timeval *, int *, int usec);
202 int ratecheck (struct timeval *, const struct timeval *);
203 void microuptime (struct timeval *tv);
204 void microtime (struct timeval *tv);
205 void nanouptime (struct timespec *ts);
206 void nanotime (struct timespec *ts);
207 void set_timeofday(struct timespec *ts);
208 void timevaladd (struct timeval *, struct timeval *);
209 void timevalsub (struct timeval *, struct timeval *);
210 int tvtohz_high (struct timeval *);
211 int tvtohz_low (struct timeval *);
215 #include <sys/cdefs.h>
218 int adjtime (const struct timeval *, struct timeval *);
219 int futimes (int, const struct timeval *);
220 int getitimer (int, struct itimerval *);
221 int gettimeofday (struct timeval *, struct timezone *);
222 int lutimes (const char *, const struct timeval *);
223 int setitimer (int, const struct itimerval *, struct itimerval *);
224 int settimeofday (const struct timeval *, const struct timezone *);
225 int utimes (const char *, const struct timeval *);
228 #endif /* !_KERNEL */
230 #endif /* !_SYS_TIME_H_ */