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#ifndef _LINUX_TIME_H

#define _LINUX_TIME_H

#include <linux/types.h>

#ifdef __KERNEL__

# include <linux/cache.h>

# include <linux/seqlock.h>

#endif

#ifndef _STRUCT_TIMESPEC

#define _STRUCT_TIMESPEC

struct timespec {

        time_t  tv_sec;         /* seconds */

        long    tv_nsec;        /* nanoseconds */

};

#endif

struct timeval {

        time_t          tv_sec;         /* seconds */

        suseconds_t     tv_usec;        /* microseconds */

};

struct timezone {

        int     tz_minuteswest; /* minutes west of Greenwich */

        int     tz_dsttime;     /* type of dst correction */

};

#ifdef __KERNEL__

/* Parameters used to convert the timespec values: */

#define MSEC_PER_SEC    1000L

#define USEC_PER_MSEC   1000L

#define NSEC_PER_USEC   1000L

#define NSEC_PER_MSEC   1000000L

#define USEC_PER_SEC    1000000L

#define NSEC_PER_SEC    1000000000L

#define FSEC_PER_SEC    1000000000000000L

static inline int timespec_equal(const struct timespec *a,

                                 const struct timespec *b)

{

        return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);

}

/*

 * lhs < rhs:  return <0

 * lhs == rhs: return 0

 * lhs > rhs:  return >0

 */

static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs)

{

        if (lhs->tv_sec < rhs->tv_sec)

                return -1;

        if (lhs->tv_sec > rhs->tv_sec)

                return 1;

        return lhs->tv_nsec - rhs->tv_nsec;

}

static inline int timeval_compare(const struct timeval *lhs, const struct timeval *rhs)

{

        if (lhs->tv_sec < rhs->tv_sec)

                return -1;

        if (lhs->tv_sec > rhs->tv_sec)

                return 1;

        return lhs->tv_usec - rhs->tv_usec;

}

extern unsigned long mktime(const unsigned int year, const unsigned int mon,

                            const unsigned int day, const unsigned int hour,

                            const unsigned int min, const unsigned int sec);

extern void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec);

/*

 * sub = lhs - rhs, in normalized form

 */

static inline struct timespec timespec_sub(struct timespec lhs,

                                                struct timespec rhs)

{

        struct timespec ts_delta;

        set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec,

                                lhs.tv_nsec - rhs.tv_nsec);

        return ts_delta;

}

/*

 * Returns true if the timespec is norm, false if denorm:

 */

#define timespec_valid(ts) \

        (((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC))

extern struct timespec xtime;

extern struct timespec wall_to_monotonic;

extern seqlock_t xtime_lock;

extern unsigned long read_persistent_clock(void);

extern int update_persistent_clock(struct timespec now);

extern int no_sync_cmos_clock __read_mostly;

void timekeeping_init(void);

unsigned long get_seconds(void);

struct timespec current_kernel_time(void);

#define CURRENT_TIME            (current_kernel_time())

#define CURRENT_TIME_SEC        ((struct timespec) { get_seconds(), 0 })

extern void do_gettimeofday(struct timeval *tv);

extern int do_settimeofday(struct timespec *tv);

extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);

#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)

extern long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags);

struct itimerval;

extern int do_setitimer(int which, struct itimerval *value,

                        struct itimerval *ovalue);

extern unsigned int alarm_setitimer(unsigned int seconds);

extern int do_getitimer(int which, struct itimerval *value);

extern void getnstimeofday(struct timespec *tv);

extern void getboottime(struct timespec *ts);

extern void monotonic_to_bootbased(struct timespec *ts);

extern struct timespec timespec_trunc(struct timespec t, unsigned gran);

extern int timekeeping_is_continuous(void);

extern void update_wall_time(void);

/**

 * timespec_to_ns - Convert timespec to nanoseconds

 * @ts:         pointer to the timespec variable to be converted

 *

 * Returns the scalar nanosecond representation of the timespec

 * parameter.

 */

static inline s64 timespec_to_ns(const struct timespec *ts)

{

        return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;

}

/**

 * timeval_to_ns - Convert timeval to nanoseconds

 * @ts:         pointer to the timeval variable to be converted

 *

 * Returns the scalar nanosecond representation of the timeval

 * parameter.

 */

static inline s64 timeval_to_ns(const struct timeval *tv)

{

        return ((s64) tv->tv_sec * NSEC_PER_SEC) +

                tv->tv_usec * NSEC_PER_USEC;

}

/**

 * ns_to_timespec - Convert nanoseconds to timespec

 * @nsec:       the nanoseconds value to be converted

 *

 * Returns the timespec representation of the nsec parameter.

 */

extern struct timespec ns_to_timespec(const s64 nsec);

/**

 * ns_to_timeval - Convert nanoseconds to timeval

 * @nsec:       the nanoseconds value to be converted

 *

 * Returns the timeval representation of the nsec parameter.

 */

extern struct timeval ns_to_timeval(const s64 nsec);

/**

 * timespec_add_ns - Adds nanoseconds to a timespec

 * @a:          pointer to timespec to be incremented

 * @ns:         unsigned nanoseconds value to be added

 */

static inline void timespec_add_ns(struct timespec *a, u64 ns)

{

        ns += a->tv_nsec;

        while(unlikely(ns >= NSEC_PER_SEC)) {

                ns -= NSEC_PER_SEC;

                a->tv_sec++;

        }

        a->tv_nsec = ns;

}

#endif /* __KERNEL__ */

#define NFDBITS                 __NFDBITS

#define FD_SETSIZE              __FD_SETSIZE

#define FD_SET(fd,fdsetp)       __FD_SET(fd,fdsetp)

#define FD_CLR(fd,fdsetp)       __FD_CLR(fd,fdsetp)

#define FD_ISSET(fd,fdsetp)     __FD_ISSET(fd,fdsetp)

#define FD_ZERO(fdsetp)         __FD_ZERO(fdsetp)

/*

 * Names of the interval timers, and structure

 * defining a timer setting:

 */

#define ITIMER_REAL             0

#define ITIMER_VIRTUAL          1

#define ITIMER_PROF             2

struct itimerspec {

        struct timespec it_interval;    /* timer period */

        struct timespec it_value;       /* timer expiration */

};

struct itimerval {

        struct timeval it_interval;     /* timer interval */

        struct timeval it_value;        /* current value */

};

/*

 * The IDs of the various system clocks (for POSIX.1b interval timers):

 */

#define CLOCK_REALTIME                  0

#define CLOCK_MONOTONIC                 1

#define CLOCK_PROCESS_CPUTIME_ID        2

#define CLOCK_THREAD_CPUTIME_ID         3

/*

 * The IDs of various hardware clocks:

 */

#define CLOCK_SGI_CYCLE                 10

#define MAX_CLOCKS                      16

#define CLOCKS_MASK                     (CLOCK_REALTIME | CLOCK_MONOTONIC)

#define CLOCKS_MONO                     CLOCK_MONOTONIC

/*

 * The various flags for setting POSIX.1b interval timers:

 */

#define TIMER_ABSTIME                   0x01

#endif