/*-

 * 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.

 * © Portions copyright (c) 2007 Symbian Software Ltd. All rights reserved.

 *	@(#)time.h	8.5 (Berkeley) 5/4/95

 * $FreeBSD: src/sys/sys/time.h,v 1.69 2005/04/02 12:33:27 das Exp $

 */

#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;

}

/*-

 * 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 */

/*

 * 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 */

};

#include <time.h>

#include <sys/cdefs.h>

__BEGIN_DECLS

IMPORT_C int	adjtime(const struct timeval *, struct timeval *);

IMPORT_C int	gettimeofday(struct timeval *, struct timezone *);

int	settimeofday(const struct timeval *, const struct timezone *);

IMPORT_C int	utimes(const char *, const struct timeval *);

__END_DECLS

#endif /* !_SYS_TIME_H_ */