time.h revision 199767f8919635c4928607450d9e0abb932109ce
/*-
* 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
* 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 <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 */
#if __BSD_VISIBLE
struct bintime {
};
static __inline void
{
}
static __inline void
{
}
static __inline void
{
}
static __inline void
{
}
static __inline void
{
if (_exp > 0) {
} else if (_exp < 0) {
}
}
#define bintime_cmp(a, b, cmp) \
#define SBT_MAX 0x7fffffffffffffffLL
static __inline int
{
return (_sbt >> 32);
}
static __inline sbintime_t
{
}
{
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
{
}
static __inline void
{
/* 18446744073 = int(2^64 / 1000000000) */
}
static __inline void
{
}
static __inline void
{
/* 18446744073709 = int(2^64 / 1000000) */
}
{
return (_ts);
}
static __inline sbintime_t
{
}
{
return (_tv);
}
static __inline sbintime_t
{
}
#endif /* __BSD_VISIBLE */
#ifdef _KERNEL
/* Operations on timespecs */
do { \
} \
} while (0)
do { \
} \
} while (0)
/* Operations on timevals. */
/* timevaladd and timevalsub are not inlined */
#endif /* _KERNEL */
do { \
} \
} while (0)
do { \
} \
} 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 {
};
/*
* 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_THREAD_CPUTIME_ID 14
#define CLOCK_PROCESS_CPUTIME_ID 15
#endif
#ifndef TIMER_ABSTIME
#endif
#if __BSD_VISIBLE
#define CPUCLOCK_WHICH_PID 0
#define CPUCLOCK_WHICH_TID 1
#endif
#ifdef _KERNEL
/*
* Kernel to clock driver interface.
*/
void resettodr(void);
extern volatile time_t time_second;
extern volatile time_t time_uptime;
extern struct bintime boottimebin;
extern struct bintime tc_tick_bt;
extern sbintime_t tc_tick_sbt;
extern sbintime_t tick_sbt;
extern int tc_precexp;
extern int tc_timepercentage;
extern struct bintime bt_timethreshold;
extern struct bintime bt_tickthreshold;
extern sbintime_t sbt_timethreshold;
extern sbintime_t sbt_tickthreshold;
/*
* 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 UTC 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" !)
*/
static __inline sbintime_t
sbinuptime(void)
{
}
static __inline sbintime_t
getsbinuptime(void)
{
getbinuptime(&_bt);
}
/* Other functions */
int ppsratecheck(struct timeval *, int *, int);
#define TC_DEFAULTPERC 5
{ \
}
(((sbt2) >= sbt_timethreshold) ? \
#else /* !_KERNEL */
#include <time.h>
#if __BSD_VISIBLE
#endif
#if __XSI_VISIBLE
#endif
#endif /* !_KERNEL */
#endif /* !_SYS_TIME_H_ */