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| Current File : //compat/linux/proc/self/root/usr/src/sys/sys/time.h |
/*-
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)time.h 8.5 (Berkeley) 5/4/95
* $FreeBSD: release/9.1.0/sys/sys/time.h 224732 2011-08-09 14:06:50Z jonathan $
*/
#ifndef _SYS_TIME_H_
#define _SYS_TIME_H_
#include <sys/_timeval.h>
#include <sys/types.h>
#include <sys/timespec.h>
struct timezone {
int tz_minuteswest; /* minutes west of Greenwich */
int tz_dsttime; /* type of dst correction */
};
#define DST_NONE 0 /* not on dst */
#define DST_USA 1 /* USA style dst */
#define DST_AUST 2 /* Australian style dst */
#define DST_WET 3 /* Western European dst */
#define DST_MET 4 /* Middle European dst */
#define DST_EET 5 /* Eastern European dst */
#define DST_CAN 6 /* Canada */
#if __BSD_VISIBLE
struct bintime {
time_t sec;
uint64_t frac;
};
static __inline void
bintime_addx(struct bintime *bt, uint64_t x)
{
uint64_t u;
u = bt->frac;
bt->frac += x;
if (u > bt->frac)
bt->sec++;
}
static __inline void
bintime_add(struct bintime *bt, const struct bintime *bt2)
{
uint64_t u;
u = bt->frac;
bt->frac += bt2->frac;
if (u > bt->frac)
bt->sec++;
bt->sec += bt2->sec;
}
static __inline void
bintime_sub(struct bintime *bt, const struct bintime *bt2)
{
uint64_t u;
u = bt->frac;
bt->frac -= bt2->frac;
if (u < bt->frac)
bt->sec--;
bt->sec -= bt2->sec;
}
static __inline void
bintime_mul(struct bintime *bt, u_int x)
{
uint64_t p1, p2;
p1 = (bt->frac & 0xffffffffull) * x;
p2 = (bt->frac >> 32) * x + (p1 >> 32);
bt->sec *= x;
bt->sec += (p2 >> 32);
bt->frac = (p2 << 32) | (p1 & 0xffffffffull);
}
#define bintime_clear(a) ((a)->sec = (a)->frac = 0)
#define bintime_isset(a) ((a)->sec || (a)->frac)
#define bintime_cmp(a, b, cmp) \
(((a)->sec == (b)->sec) ? \
((a)->frac cmp (b)->frac) : \
((a)->sec cmp (b)->sec))
/*-
* Background information:
*
* When converting between timestamps on parallel timescales of differing
* resolutions it is historical and scientific practice to round down rather
* than doing 4/5 rounding.
*
* The date changes at midnight, not at noon.
*
* Even at 15:59:59.999999999 it's not four'o'clock.
*
* time_second ticks after N.999999999 not after N.4999999999
*/
static __inline void
bintime2timespec(const struct bintime *bt, struct timespec *ts)
{
ts->tv_sec = bt->sec;
ts->tv_nsec = ((uint64_t)1000000000 * (uint32_t)(bt->frac >> 32)) >> 32;
}
static __inline void
timespec2bintime(const struct timespec *ts, struct bintime *bt)
{
bt->sec = ts->tv_sec;
/* 18446744073 = int(2^64 / 1000000000) */
bt->frac = ts->tv_nsec * (uint64_t)18446744073LL;
}
static __inline void
bintime2timeval(const struct bintime *bt, struct timeval *tv)
{
tv->tv_sec = bt->sec;
tv->tv_usec = ((uint64_t)1000000 * (uint32_t)(bt->frac >> 32)) >> 32;
}
static __inline void
timeval2bintime(const struct timeval *tv, struct bintime *bt)
{
bt->sec = tv->tv_sec;
/* 18446744073709 = int(2^64 / 1000000) */
bt->frac = tv->tv_usec * (uint64_t)18446744073709LL;
}
#endif /* __BSD_VISIBLE */
#ifdef _KERNEL
/* Operations on timespecs */
#define timespecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
#define timespecisset(tvp) ((tvp)->tv_sec || (tvp)->tv_nsec)
#define timespeccmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
#define timespecadd(vvp, uvp) \
do { \
(vvp)->tv_sec += (uvp)->tv_sec; \
(vvp)->tv_nsec += (uvp)->tv_nsec; \
if ((vvp)->tv_nsec >= 1000000000) { \
(vvp)->tv_sec++; \
(vvp)->tv_nsec -= 1000000000; \
} \
} while (0)
#define timespecsub(vvp, uvp) \
do { \
(vvp)->tv_sec -= (uvp)->tv_sec; \
(vvp)->tv_nsec -= (uvp)->tv_nsec; \
if ((vvp)->tv_nsec < 0) { \
(vvp)->tv_sec--; \
(vvp)->tv_nsec += 1000000000; \
} \
} while (0)
/* Operations on timevals. */
#define timevalclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
#define timevalisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
#define timevalcmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_usec cmp (uvp)->tv_usec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
/* timevaladd and timevalsub are not inlined */
#endif /* _KERNEL */
#ifndef _KERNEL /* NetBSD/OpenBSD compatible interfaces */
#define timerclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
#define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
#define timercmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_usec cmp (uvp)->tv_usec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
#define timeradd(tvp, uvp, vvp) \
do { \
(vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
(vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
if ((vvp)->tv_usec >= 1000000) { \
(vvp)->tv_sec++; \
(vvp)->tv_usec -= 1000000; \
} \
} while (0)
#define timersub(tvp, uvp, vvp) \
do { \
(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
if ((vvp)->tv_usec < 0) { \
(vvp)->tv_sec--; \
(vvp)->tv_usec += 1000000; \
} \
} while (0)
#endif
/*
* Names of the interval timers, and structure
* defining a timer setting.
*/
#define ITIMER_REAL 0
#define ITIMER_VIRTUAL 1
#define ITIMER_PROF 2
struct itimerval {
struct timeval it_interval; /* timer interval */
struct timeval it_value; /* current value */
};
/*
* Getkerninfo clock information structure
*/
struct clockinfo {
int hz; /* clock frequency */
int tick; /* micro-seconds per hz tick */
int spare;
int stathz; /* statistics clock frequency */
int profhz; /* profiling clock frequency */
};
/* These macros are also in time.h. */
#ifndef CLOCK_REALTIME
#define CLOCK_REALTIME 0
#define CLOCK_VIRTUAL 1
#define CLOCK_PROF 2
#define CLOCK_MONOTONIC 4
#define CLOCK_UPTIME 5 /* FreeBSD-specific. */
#define CLOCK_UPTIME_PRECISE 7 /* FreeBSD-specific. */
#define CLOCK_UPTIME_FAST 8 /* FreeBSD-specific. */
#define CLOCK_REALTIME_PRECISE 9 /* FreeBSD-specific. */
#define CLOCK_REALTIME_FAST 10 /* FreeBSD-specific. */
#define CLOCK_MONOTONIC_PRECISE 11 /* FreeBSD-specific. */
#define CLOCK_MONOTONIC_FAST 12 /* FreeBSD-specific. */
#define CLOCK_SECOND 13 /* FreeBSD-specific. */
#define CLOCK_THREAD_CPUTIME_ID 14
#endif
#ifndef TIMER_ABSTIME
#define TIMER_RELTIME 0x0 /* relative timer */
#define TIMER_ABSTIME 0x1 /* absolute timer */
#endif
#ifdef _KERNEL
/*
* Kernel to clock driver interface.
*/
void inittodr(time_t base);
void resettodr(void);
extern time_t time_second;
extern time_t time_uptime;
extern struct bintime boottimebin;
extern struct timeval boottime;
/*
* Functions for looking at our clock: [get]{bin,nano,micro}[up]time()
*
* Functions without the "get" prefix returns the best timestamp
* we can produce in the given format.
*
* "bin" == struct bintime == seconds + 64 bit fraction of seconds.
* "nano" == struct timespec == seconds + nanoseconds.
* "micro" == struct timeval == seconds + microseconds.
*
* Functions containing "up" returns time relative to boot and
* should be used for calculating time intervals.
*
* Functions without "up" returns GMT time.
*
* Functions with the "get" prefix returns a less precise result
* much faster than the functions without "get" prefix and should
* be used where a precision of 1/hz seconds is acceptable or where
* performance is priority. (NB: "precision", _not_ "resolution" !)
*
*/
void binuptime(struct bintime *bt);
void nanouptime(struct timespec *tsp);
void microuptime(struct timeval *tvp);
void bintime(struct bintime *bt);
void nanotime(struct timespec *tsp);
void microtime(struct timeval *tvp);
void getbinuptime(struct bintime *bt);
void getnanouptime(struct timespec *tsp);
void getmicrouptime(struct timeval *tvp);
void getbintime(struct bintime *bt);
void getnanotime(struct timespec *tsp);
void getmicrotime(struct timeval *tvp);
/* Other functions */
int itimerdecr(struct itimerval *itp, int usec);
int itimerfix(struct timeval *tv);
int ppsratecheck(struct timeval *, int *, int);
int ratecheck(struct timeval *, const struct timeval *);
void timevaladd(struct timeval *t1, const struct timeval *t2);
void timevalsub(struct timeval *t1, const struct timeval *t2);
int tvtohz(struct timeval *tv);
#else /* !_KERNEL */
#include <time.h>
#include <sys/cdefs.h>
#include <sys/select.h>
__BEGIN_DECLS
int setitimer(int, const struct itimerval *, struct itimerval *);
int utimes(const char *, const struct timeval *);
#if __BSD_VISIBLE
int adjtime(const struct timeval *, struct timeval *);
int futimes(int, const struct timeval *);
int futimesat(int, const char *, const struct timeval [2]);
int lutimes(const char *, const struct timeval *);
int settimeofday(const struct timeval *, const struct timezone *);
#endif
#if __XSI_VISIBLE
int getitimer(int, struct itimerval *);
int gettimeofday(struct timeval *, struct timezone *);
#endif
__END_DECLS
#endif /* !_KERNEL */
#endif /* !_SYS_TIME_H_ */