/*
 * 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
 * $FreeBSD: src/sys/sys/time.h,v 1.42 1999/12/29 04:24:48 peter Exp $
 */

#ifndef _SYS_TIME_H_
#define _SYS_TIME_H_

#ifdef _KERNEL
#include <sys/types.h>
#include <machine/clock.h>
#else
#include <machine/stdint.h>
#endif

#include <sys/_clock_id.h>
#include <sys/_timespec.h>
#include <sys/_timeval.h>
#include <sys/select.h>

#define TIMEVAL_TO_TIMESPEC(tv, ts)                                     \
        do {                                                            \
                (ts)->tv_sec = (tv)->tv_sec;                            \
                (ts)->tv_nsec = (tv)->tv_usec * 1000;                   \
        } while (0)
#define TIMESPEC_TO_TIMEVAL(tv, ts)                                     \
        do {                                                            \
                (tv)->tv_sec = (ts)->tv_sec;                            \
                (tv)->tv_usec = (ts)->tv_nsec / 1000;                   \
        } while (0)

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 */

/* Operations on timespecs */
#define timespecclear(tvp)      ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
#define timespecisset(tvp)      ((tvp)->tv_sec || (tvp)->tv_nsec)
#define timespeccmp(tvp, uvp, cmp)                                      \
        (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
            ((tvp)->tv_nsec cmp (uvp)->tv_nsec) :                       \
            ((tvp)->tv_sec cmp (uvp)->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 (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 (0)

/* Operations on timevals. */
#define timevalclear(tvp)               ((tvp)->tv_sec = (tvp)->tv_usec = 0)
#define timevalisset(tvp)               ((tvp)->tv_sec || (tvp)->tv_usec)
#define timevalcmp(tvp, uvp, cmp)                                       \
        (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
            ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
            ((tvp)->tv_sec cmp (uvp)->tv_sec))

/* timevaladd and timevalsub are not inlined */

#ifndef _KERNEL                 /* NetBSD/OpenBSD compatible interfaces */

#define timerclear(tvp)         ((tvp)->tv_sec = (tvp)->tv_usec = 0)
#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 (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 (0)

#endif /* !_KERNEL */

/*
 * 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     tickadj;        /* clock skew rate for adjtime() */
        int     stathz;         /* statistics clock frequency */
        int     profhz;         /* profiling clock frequency */
};

#ifdef _KERNEL

extern time_t   time_second;            /* simple time_t (can step) */
extern time_t   time_uptime;            /* monotonic simple uptime / seconds */
extern int64_t  ntp_tick_permanent;
extern int64_t  ntp_tick_acc;
extern int64_t  ntp_delta;
extern int64_t  ntp_big_delta;
extern int32_t  ntp_tick_delta;
extern int32_t  ntp_default_tick_delta;
extern time_t   ntp_leap_second;
extern int      ntp_leap_insert;

void    initclocks_pcpu(void);
void    getmicrouptime(struct timeval *tv);
void    getmicrotime(struct timeval *tv);
void    getnanouptime(struct timespec *tv);
void    getnanotime(struct timespec *tv);
int     itimerdecr(struct itimerval *itp, int usec);
int     itimerfix(struct timeval *tv);
int     itimespecfix(struct timespec *ts);
int     ppsratecheck(struct timeval *, int *, int usec);
int     ratecheck(struct timeval *, const struct timeval *);
void    microuptime(struct timeval *tv);
void    microtime(struct timeval *tv);
void    nanouptime(struct timespec *ts);
void    nanotime(struct timespec *ts);
time_t  get_approximate_time_t(void);
void    set_timeofday(struct timespec *ts);
void    kern_adjtime(int64_t, int64_t *);
void    kern_reladjtime(int64_t);
void    timevaladd(struct timeval *, const struct timeval *);
void    timevalsub(struct timeval *, const struct timeval *);
int     tvtohz_high(struct timeval *);
int     tvtohz_low(struct timeval *);
int     tstohz_high(struct timespec *);
int     tstohz_low(struct timespec *);
int     tsc_test_target(int64_t target);
void    tsc_delay(int ns);
int     clock_nanosleep1(clockid_t clock_id, int flags,
                struct timespec *rqt, struct timespec *rmt);
int     nanosleep1(struct timespec *rqt, struct timespec *rmt);

void    timespec2fattime(const struct timespec *tsp, int utc, uint16_t *ddp,
                uint16_t *dtp, uint8_t *dhp);
void    fattime2timespec(unsigned dd, unsigned dt, unsigned dh, int utc,
                struct timespec *tsp);

tsc_uclock_t tsc_get_target(int ns);

#else /* !_KERNEL */

#include <time.h>
#include <sys/cdefs.h>

#endif /* _KERNEL */

__BEGIN_DECLS

#if __BSD_VISIBLE
int     adjtime(const struct timeval *, struct timeval *);
int     futimes(int, const struct timeval *);
int     futimesat(int fd, const char *path, const struct timeval times[2]);
int     lutimes(const char *, const struct timeval *);
int     settimeofday(const struct timeval *, const struct timezone *);

#define HAVE_FUTIMESAT  1

#endif

#if __XSI_VISIBLE
int     getitimer(int, struct itimerval *);
int     gettimeofday(struct timeval * __restrict, struct timezone * __restrict);
int     setitimer(int, const struct itimerval * __restrict,
            struct itimerval * __restrict);
int     utimes(const char *, const struct timeval *);
#endif

__END_DECLS

#endif /* !_SYS_TIME_H_ */