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#ifndef _LINUX_TIME_H

#define _LINUX_TIME_H

//# include 

//# include 

# include 

//#include 

extern struct timezone sys_tz;

/* 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	1000000000000000LL

#define TIME_T_MAX	(time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)

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, s64 nsec);

/*

 * timespec_add_safe assumes both values are positive and checks

 * for overflow. It will return TIME_T_MAX if the reutrn would be

 * smaller then either of the arguments.

 */

extern struct timespec timespec_add_safe(const struct timespec lhs,

					 const struct timespec rhs);

static inline struct timespec timespec_add(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;

}

/*

 * 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;

}

#define KTIME_MAX			((s64)~((u64)1 << 63))

#if (BITS_PER_LONG == 64)

# define KTIME_SEC_MAX			(KTIME_MAX / NSEC_PER_SEC)

#else

# define KTIME_SEC_MAX			LONG_MAX

#endif

/*

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

 */

static inline bool timespec_valid(const struct timespec *ts)

{

	/* Dates before 1970 are bogus */

	if (ts->tv_sec < 0)

		return false;

	/* Can't have more nanoseconds then a second */

	if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC)

		return false;

	return true;

}

static inline bool timespec_valid_strict(const struct timespec *ts)

{

	if (!timespec_valid(ts))

		return false;

	/* Disallow values that could overflow ktime_t */

	if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)

		return false;

	return true;

}

extern bool persistent_clock_exist;

static inline bool has_persistent_clock(void)

{

	return persistent_clock_exist;

}

extern void read_persistent_clock(struct timespec *ts);

extern void read_boot_clock(struct timespec *ts);

extern int persistent_clock_is_local;

extern int update_persistent_clock(struct timespec now);

void timekeeping_init(void);

extern int timekeeping_suspended;

unsigned long get_seconds(void);

struct timespec current_kernel_time(void);

struct timespec __current_kernel_time(void); /* does not take xtime_lock */

struct timespec get_monotonic_coarse(void);

void get_xtime_and_monotonic_and_sleep_offset(struct timespec *xtim,

				struct timespec *wtom, struct timespec *sleep);

void timekeeping_inject_sleeptime(struct timespec *delta);

#define CURRENT_TIME		(current_kernel_time())

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

/* Some architectures do not supply their own clocksource.

 * This is mainly the case in architectures that get their

 * inter-tick times by reading the counter on their interval

 * timer. Since these timers wrap every tick, they're not really

 * useful as clocksources. Wrapping them to act like one is possible

 * but not very efficient. So we provide a callout these arches

 * can implement for use with the jiffies clocksource to provide

 * finer then tick granular time.

 */

#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET

extern u32 (*arch_gettimeoffset)(void);

#endif

extern void do_gettimeofday(struct timeval *tv);

extern int do_settimeofday(const struct timespec *tv);

extern int do_sys_settimeofday(const struct timespec *tv,

			       const struct timezone *tz);

#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)

extern long do_utimes(int dfd, const 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 int __getnstimeofday(struct timespec *tv);

extern void getnstimeofday(struct timespec *tv);

extern void getrawmonotonic(struct timespec *ts);

extern void getnstime_raw_and_real(struct timespec *ts_raw,

		struct timespec *ts_real);

extern void getboottime(struct timespec *ts);

extern void monotonic_to_bootbased(struct timespec *ts);

extern void get_monotonic_boottime(struct timespec *ts);

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

extern int timekeeping_valid_for_hres(void);

extern u64 timekeeping_max_deferment(void);

extern int timekeeping_inject_offset(struct timespec *ts);

extern s32 timekeeping_get_tai_offset(void);

extern void timekeeping_set_tai_offset(s32 tai_offset);

extern void timekeeping_clocktai(struct timespec *ts);

struct tms;

extern void do_sys_times(struct tms *);

/*

 * Similar to the struct tm in userspace , but it needs to be here so

 * that the kernel source is self contained.

 */

struct tm {

	/*

	 * the number of seconds after the minute, normally in the range

	 * 0 to 59, but can be up to 60 to allow for leap seconds

	 */

	int tm_sec;

	/* the number of minutes after the hour, in the range 0 to 59*/

	int tm_min;

	/* the number of hours past midnight, in the range 0 to 23 */

	int tm_hour;

	/* the day of the month, in the range 1 to 31 */

	int tm_mday;

	/* the number of months since January, in the range 0 to 11 */

	int tm_mon;

	/* the number of years since 1900 */

	long tm_year;

	/* the number of days since Sunday, in the range 0 to 6 */

	int tm_wday;

	/* the number of days since January 1, in the range 0 to 365 */

	int tm_yday;

};

void time_to_tm(time_t totalsecs, int offset, struct tm *result);

/**

 * 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

 *

 * This must always be inlined because its used from the x86-64 vdso,

 * which cannot call other kernel functions.

 */

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

{

	a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns);

	a->tv_nsec = ns;

}

#endif