302 lines
7.5 KiB
C
302 lines
7.5 KiB
C
/* time.h -- An implementation of the standard Unix <sys/time.h> file.
|
|
Written by Geoffrey Noer <noer@cygnus.com>
|
|
Public domain; no rights reserved. */
|
|
|
|
/*-
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _SYS_TIME_H_
|
|
#define _SYS_TIME_H_
|
|
|
|
#include <_ansi.h>
|
|
#include <sys/cdefs.h>
|
|
#include <sys/_timeval.h>
|
|
#include <sys/types.h>
|
|
#include <sys/timespec.h>
|
|
|
|
#if __BSD_VISIBLE || __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
|
|
#include <sys/select.h>
|
|
#endif
|
|
|
|
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);
|
|
}
|
|
|
|
static __inline void
|
|
bintime_shift(struct bintime *_bt, int _exp)
|
|
{
|
|
|
|
if (_exp > 0) {
|
|
_bt->sec <<= _exp;
|
|
_bt->sec |= _bt->frac >> (64 - _exp);
|
|
_bt->frac <<= _exp;
|
|
} else if (_exp < 0) {
|
|
_bt->frac >>= -_exp;
|
|
_bt->frac |= (uint64_t)_bt->sec << (64 + _exp);
|
|
_bt->sec >>= -_exp;
|
|
}
|
|
}
|
|
|
|
#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))
|
|
|
|
#define SBT_1S ((sbintime_t)1 << 32)
|
|
#define SBT_1M (SBT_1S * 60)
|
|
#define SBT_1MS (SBT_1S / 1000)
|
|
#define SBT_1US (SBT_1S / 1000000)
|
|
#define SBT_1NS (SBT_1S / 1000000000)
|
|
#define SBT_MAX 0x7fffffffffffffffLL
|
|
|
|
static __inline int
|
|
sbintime_getsec(sbintime_t _sbt)
|
|
{
|
|
|
|
return (_sbt >> 32);
|
|
}
|
|
|
|
static __inline sbintime_t
|
|
bttosbt(const struct bintime _bt)
|
|
{
|
|
|
|
return (((sbintime_t)_bt.sec << 32) + (_bt.frac >> 32));
|
|
}
|
|
|
|
static __inline struct bintime
|
|
sbttobt(sbintime_t _sbt)
|
|
{
|
|
struct bintime _bt;
|
|
|
|
_bt.sec = _sbt >> 32;
|
|
_bt.frac = _sbt << 32;
|
|
return (_bt);
|
|
}
|
|
|
|
/*-
|
|
* 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;
|
|
}
|
|
|
|
static __inline struct timespec
|
|
sbttots(sbintime_t _sbt)
|
|
{
|
|
struct timespec _ts;
|
|
|
|
_ts.tv_sec = _sbt >> 32;
|
|
_ts.tv_nsec = ((uint64_t)1000000000 * (uint32_t)_sbt) >> 32;
|
|
return (_ts);
|
|
}
|
|
|
|
static __inline sbintime_t
|
|
tstosbt(struct timespec _ts)
|
|
{
|
|
|
|
return (((sbintime_t)_ts.tv_sec << 32) +
|
|
(_ts.tv_nsec * (((uint64_t)1 << 63) / 500000000) >> 32));
|
|
}
|
|
|
|
static __inline struct timeval
|
|
sbttotv(sbintime_t _sbt)
|
|
{
|
|
struct timeval _tv;
|
|
|
|
_tv.tv_sec = _sbt >> 32;
|
|
_tv.tv_usec = ((uint64_t)1000000 * (uint32_t)_sbt) >> 32;
|
|
return (_tv);
|
|
}
|
|
|
|
static __inline sbintime_t
|
|
tvtosbt(struct timeval _tv)
|
|
{
|
|
|
|
return (((sbintime_t)_tv.tv_sec << 32) +
|
|
(_tv.tv_usec * (((uint64_t)1 << 63) / 500000) >> 32));
|
|
}
|
|
#endif /* __BSD_VISIBLE */
|
|
|
|
/*
|
|
* 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 */
|
|
};
|
|
|
|
#ifndef _KERNEL
|
|
#include <time.h>
|
|
|
|
__BEGIN_DECLS
|
|
int _EXFUN(utimes, (const char *__path, const struct timeval *__tvp));
|
|
|
|
#if __BSD_VISIBLE
|
|
int _EXFUN(adjtime, (const struct timeval *, struct timeval *));
|
|
int _EXFUN(futimes, (int, const struct timeval *));
|
|
int _EXFUN(lutimes, (const char *, const struct timeval *));
|
|
int _EXFUN(settimeofday, (const struct timeval *, const struct timezone *));
|
|
#endif
|
|
|
|
#if __MISC_VISIBLE || __XSI_VISIBLE
|
|
int _EXFUN(getitimer, (int __which, struct itimerval *__value));
|
|
int _EXFUN(setitimer, (int __which, const struct itimerval *__restrict __value,
|
|
struct itimerval *__restrict __ovalue));
|
|
#endif
|
|
|
|
int _EXFUN(gettimeofday, (struct timeval *__restrict __p,
|
|
void *__restrict __tz));
|
|
|
|
#if __GNU_VISIBLE
|
|
int _EXFUN(futimesat, (int, const char *, const struct timeval [2]));
|
|
#endif
|
|
|
|
#ifdef _COMPILING_NEWLIB
|
|
int _EXFUN(_gettimeofday, (struct timeval *__p, void *__tz));
|
|
#endif
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* !_KERNEL */
|
|
#include <machine/_time.h>
|
|
|
|
#endif /* !_SYS_TIME_H_ */
|