NetBSD-5.0.2/sys/sys/time.h
/* $NetBSD: time.h,v 1.62 2008/07/15 16:18:09 christos Exp $ */
/*
* 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.
* 3. 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
*/
#ifndef _SYS_TIME_H_
#define _SYS_TIME_H_
#include <sys/featuretest.h>
#include <sys/types.h>
/*
* Structure returned by gettimeofday(2) system call,
* and used in other calls.
*/
struct timeval {
long tv_sec; /* seconds */
long tv_usec; /* and microseconds */
};
/*
* Structure defined by POSIX.1b to be like a timeval.
*/
struct timespec {
time_t tv_sec; /* seconds */
long tv_nsec; /* and nanoseconds */
};
#if defined(_NETBSD_SOURCE)
#define TIMEVAL_TO_TIMESPEC(tv, ts) do { \
(ts)->tv_sec = (tv)->tv_sec; \
(ts)->tv_nsec = (tv)->tv_usec * 1000; \
} while (/*CONSTCOND*/0)
#define TIMESPEC_TO_TIMEVAL(tv, ts) do { \
(tv)->tv_sec = (ts)->tv_sec; \
(tv)->tv_usec = (ts)->tv_nsec / 1000; \
} while (/*CONSTCOND*/0)
/*
* Note: timezone is obsolete. All timezone handling is now in
* userland. Its just here for back compatibility.
*/
struct timezone {
int tz_minuteswest; /* minutes west of Greenwich */
int tz_dsttime; /* type of dst correction */
};
/* Operations on timevals. */
#define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0L
#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 (/* CONSTCOND */ 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 (/* CONSTCOND */ 0)
/*
* hide bintime for _STANDALONE because this header is used for hpcboot.exe,
* which is built with compilers which don't recognize LL suffix.
* http://mail-index.NetBSD.org/tech-userlevel/2008/02/27/msg000181.html
*/
#if !defined(_STANDALONE)
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;
}
/*-
* 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 =
(long)(((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 =
(long)(((uint64_t)1000000 * (uint32_t)(bt->frac >> 32)) >> 32);
}
static __inline void
timeval2bintime(const struct timeval *tv, struct bintime *bt)
{
bt->sec = (/* XXX NetBSD not SUS compliant - MUST FIX */time_t)tv->tv_sec;
/* 18446744073709 = int(2^64 / 1000000) */
bt->frac = tv->tv_usec * (uint64_t)18446744073709LL;
}
#endif /* !defined(_STANDALONE) */
/* Operations on timespecs. */
#define timespecclear(tsp) (tsp)->tv_sec = (time_t)((tsp)->tv_nsec = 0L)
#define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec)
#define timespeccmp(tsp, usp, cmp) \
(((tsp)->tv_sec == (usp)->tv_sec) ? \
((tsp)->tv_nsec cmp (usp)->tv_nsec) : \
((tsp)->tv_sec cmp (usp)->tv_sec))
#define timespecadd(tsp, usp, vsp) \
do { \
(vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \
(vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \
if ((vsp)->tv_nsec >= 1000000000L) { \
(vsp)->tv_sec++; \
(vsp)->tv_nsec -= 1000000000L; \
} \
} while (/* CONSTCOND */ 0)
#define timespecsub(tsp, usp, vsp) \
do { \
(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
if ((vsp)->tv_nsec < 0) { \
(vsp)->tv_sec--; \
(vsp)->tv_nsec += 1000000000L; \
} \
} while (/* CONSTCOND */ 0)
#define timespec2ns(x) (((uint64_t)(x)->tv_sec) * 1000000000L + (x)->tv_nsec)
#endif /* _NETBSD_SOURCE */
/*
* 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 */
};
/*
* Structure defined by POSIX.1b to be like a itimerval, but with
* timespecs. Used in the timer_*() system calls.
*/
struct itimerspec {
struct timespec it_interval;
struct timespec it_value;
};
#define CLOCK_REALTIME 0
#define CLOCK_VIRTUAL 1
#define CLOCK_PROF 2
#define CLOCK_MONOTONIC 3
#define TIMER_RELTIME 0x0 /* relative timer */
#define TIMER_ABSTIME 0x1 /* absolute timer */
#ifdef _KERNEL
#include <sys/timevar.h>
#else /* !_KERNEL */
#ifndef _STANDALONE
#if (_POSIX_C_SOURCE - 0) >= 200112L || \
(defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
(_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
#include <sys/select.h>
#endif
#include <sys/cdefs.h>
#include <time.h>
__BEGIN_DECLS
#if (_POSIX_C_SOURCE - 0) >= 200112L || \
defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
int getitimer(int, struct itimerval *);
int gettimeofday(struct timeval * __restrict, void *__restrict);
int setitimer(int, const struct itimerval * __restrict,
struct itimerval * __restrict);
int utimes(const char *, const struct timeval [2]);
#endif /* _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE || _NETBSD_SOURCE */
#if defined(_NETBSD_SOURCE)
int adjtime(const struct timeval *, struct timeval *);
int futimes(int, const struct timeval [2]);
int lutimes(const char *, const struct timeval [2]);
int settimeofday(const struct timeval * __restrict,
const void *__restrict);
#endif /* _NETBSD_SOURCE */
__END_DECLS
#endif /* !_STANDALONE */
#endif /* !_KERNEL */
#endif /* !_SYS_TIME_H_ */