LCOM1920-T02G10

/*        $NetBSD: time.h,v 1.70 2015/07/31 12:51:32 kamil 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 {

        time_t            tv_sec;                /* seconds */

        suseconds_t        tv_usec;        /* and microseconds */

};

#include <sys/timespec.h>

#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 = (suseconds_t)(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;

}

#define        bintimecmp(bta, btb, cmp)                                        \

        (((bta)->sec == (btb)->sec) ?                                        \

            ((bta)->frac cmp (btb)->frac) :                                \

            ((bta)->sec cmp (btb)->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 = (uint64_t)ts->tv_nsec * (uint64_t)18446744073ULL;

}

static __inline void

bintime2timeval(const struct bintime *bt, struct timeval *tv)

{

        tv->tv_sec = bt->sec;

        tv->tv_usec =

            (suseconds_t)(((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 = (uint64_t)tv->tv_usec * (uint64_t)18446744073709ULL;

}

static __inline struct bintime

ms2bintime(uint64_t ms)

{

        struct bintime bt;

        bt.sec = ms / 1000U;

        bt.frac = (((ms % 1000U) >> 32)/1000U) >> 32;

        return bt;

}

static __inline struct bintime

us2bintime(uint64_t us)

{

        struct bintime bt;

        bt.sec = us / 1000000U;

        bt.frac = (((us % 1000000U) >> 32)/1000000U) >> 32;

        return bt;

}

static __inline struct bintime

ns2bintime(uint64_t ns)

{

        struct bintime bt;

        bt.sec = ns / 1000000000U;

        bt.frac = (((ns % 1000000000U) >> 32)/1000000000U) >> 32;

        return bt;

}

#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.

 * NB: Must match the CLOCK_ constants below.

 */

#define        ITIMER_REAL                0

#define        ITIMER_VIRTUAL                1

#define        ITIMER_PROF                2

#define        ITIMER_MONOTONIC        3

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

#if !defined(__minix)

#define        CLOCK_VIRTUAL        1

#define        CLOCK_PROF        2

#endif /* !defined(__minix) */

#define        CLOCK_MONOTONIC        3

#if defined(_NETBSD_SOURCE)

#define        TIMER_RELTIME        0x0        /* relative timer */

#endif

#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

#ifndef __LIBC12_SOURCE__

#if (_POSIX_C_SOURCE - 0) >= 200112L || \

    defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)

int        getitimer(int, struct itimerval *) __RENAME(__getitimer50);

int        gettimeofday(struct timeval * __restrict, void *__restrict)

    __RENAME(__gettimeofday50);

int        setitimer(int, const struct itimerval * __restrict,

            struct itimerval * __restrict) __RENAME(__setitimer50);

int        utimes(const char *, const struct timeval [2]) __RENAME(__utimes50);

#endif /* _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE || _NETBSD_SOURCE */

#if defined(_NETBSD_SOURCE) || defined(HAVE_NBTOOL_CONFIG_H)

int        adjtime(const struct timeval *, struct timeval *) __RENAME(__adjtime50);

int        futimes(int, const struct timeval [2]) __RENAME(__futimes50);

int        lutimes(const char *, const struct timeval [2]) __RENAME(__lutimes50);

int        settimeofday(const struct timeval * __restrict,

            const void *__restrict) __RENAME(__settimeofday50);

#endif /* _NETBSD_SOURCE */

#endif /* __LIBC12_SOURCE__ */

__END_DECLS

#endif        /* !_STANDALONE */

#endif /* !_KERNEL */

#endif /* !_SYS_TIME_H_ */