forked from KolibriOS/kolibrios
ddk: update
git-svn-id: svn://kolibrios.org@4065 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
270
drivers/include/linux/time.h
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270
drivers/include/linux/time.h
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#ifndef _LINUX_TIME_H
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#define _LINUX_TIME_H
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//# include <linux/cache.h>
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//# include <linux/seqlock.h>
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# include <linux/math64.h>
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//#include <uapi/linux/time.h>
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extern struct timezone sys_tz;
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/* Parameters used to convert the timespec values: */
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#define MSEC_PER_SEC 1000L
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#define USEC_PER_MSEC 1000L
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#define NSEC_PER_USEC 1000L
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#define NSEC_PER_MSEC 1000000L
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#define USEC_PER_SEC 1000000L
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#define NSEC_PER_SEC 1000000000L
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#define FSEC_PER_SEC 1000000000000000LL
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#define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
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static inline int timespec_equal(const struct timespec *a,
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const struct timespec *b)
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{
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return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
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}
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/*
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* lhs < rhs: return <0
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* lhs == rhs: return 0
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* lhs > rhs: return >0
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*/
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static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs)
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{
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if (lhs->tv_sec < rhs->tv_sec)
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return -1;
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if (lhs->tv_sec > rhs->tv_sec)
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return 1;
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return lhs->tv_nsec - rhs->tv_nsec;
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}
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static inline int timeval_compare(const struct timeval *lhs, const struct timeval *rhs)
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{
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if (lhs->tv_sec < rhs->tv_sec)
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return -1;
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if (lhs->tv_sec > rhs->tv_sec)
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return 1;
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return lhs->tv_usec - rhs->tv_usec;
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}
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extern unsigned long mktime(const unsigned int year, const unsigned int mon,
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const unsigned int day, const unsigned int hour,
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const unsigned int min, const unsigned int sec);
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extern void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec);
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/*
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* timespec_add_safe assumes both values are positive and checks
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* for overflow. It will return TIME_T_MAX if the reutrn would be
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* smaller then either of the arguments.
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*/
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extern struct timespec timespec_add_safe(const struct timespec lhs,
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const struct timespec rhs);
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static inline struct timespec timespec_add(struct timespec lhs,
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struct timespec rhs)
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{
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struct timespec ts_delta;
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set_normalized_timespec(&ts_delta, lhs.tv_sec + rhs.tv_sec,
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lhs.tv_nsec + rhs.tv_nsec);
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return ts_delta;
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}
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/*
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* sub = lhs - rhs, in normalized form
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*/
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static inline struct timespec timespec_sub(struct timespec lhs,
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struct timespec rhs)
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{
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struct timespec ts_delta;
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set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec,
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lhs.tv_nsec - rhs.tv_nsec);
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return ts_delta;
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}
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#define KTIME_MAX ((s64)~((u64)1 << 63))
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#if (BITS_PER_LONG == 64)
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# define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
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#else
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# define KTIME_SEC_MAX LONG_MAX
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#endif
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/*
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* Returns true if the timespec is norm, false if denorm:
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*/
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static inline bool timespec_valid(const struct timespec *ts)
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{
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/* Dates before 1970 are bogus */
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if (ts->tv_sec < 0)
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return false;
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/* Can't have more nanoseconds then a second */
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if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC)
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return false;
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return true;
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}
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static inline bool timespec_valid_strict(const struct timespec *ts)
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{
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if (!timespec_valid(ts))
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return false;
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/* Disallow values that could overflow ktime_t */
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if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
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return false;
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return true;
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}
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extern bool persistent_clock_exist;
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static inline bool has_persistent_clock(void)
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{
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return persistent_clock_exist;
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}
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extern void read_persistent_clock(struct timespec *ts);
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extern void read_boot_clock(struct timespec *ts);
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extern int persistent_clock_is_local;
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extern int update_persistent_clock(struct timespec now);
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void timekeeping_init(void);
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extern int timekeeping_suspended;
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unsigned long get_seconds(void);
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struct timespec current_kernel_time(void);
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struct timespec __current_kernel_time(void); /* does not take xtime_lock */
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struct timespec get_monotonic_coarse(void);
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void get_xtime_and_monotonic_and_sleep_offset(struct timespec *xtim,
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struct timespec *wtom, struct timespec *sleep);
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void timekeeping_inject_sleeptime(struct timespec *delta);
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#define CURRENT_TIME (current_kernel_time())
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#define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 })
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/* Some architectures do not supply their own clocksource.
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* This is mainly the case in architectures that get their
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* inter-tick times by reading the counter on their interval
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* timer. Since these timers wrap every tick, they're not really
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* useful as clocksources. Wrapping them to act like one is possible
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* but not very efficient. So we provide a callout these arches
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* can implement for use with the jiffies clocksource to provide
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* finer then tick granular time.
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*/
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#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
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extern u32 (*arch_gettimeoffset)(void);
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#endif
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extern void do_gettimeofday(struct timeval *tv);
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extern int do_settimeofday(const struct timespec *tv);
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extern int do_sys_settimeofday(const struct timespec *tv,
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const struct timezone *tz);
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#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
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extern long do_utimes(int dfd, const char __user *filename, struct timespec *times, int flags);
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struct itimerval;
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extern int do_setitimer(int which, struct itimerval *value,
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struct itimerval *ovalue);
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extern unsigned int alarm_setitimer(unsigned int seconds);
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extern int do_getitimer(int which, struct itimerval *value);
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extern int __getnstimeofday(struct timespec *tv);
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extern void getnstimeofday(struct timespec *tv);
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extern void getrawmonotonic(struct timespec *ts);
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extern void getnstime_raw_and_real(struct timespec *ts_raw,
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struct timespec *ts_real);
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extern void getboottime(struct timespec *ts);
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extern void monotonic_to_bootbased(struct timespec *ts);
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extern void get_monotonic_boottime(struct timespec *ts);
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extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
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extern int timekeeping_valid_for_hres(void);
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extern u64 timekeeping_max_deferment(void);
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extern int timekeeping_inject_offset(struct timespec *ts);
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extern s32 timekeeping_get_tai_offset(void);
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extern void timekeeping_set_tai_offset(s32 tai_offset);
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extern void timekeeping_clocktai(struct timespec *ts);
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struct tms;
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extern void do_sys_times(struct tms *);
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/*
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* Similar to the struct tm in userspace <time.h>, but it needs to be here so
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* that the kernel source is self contained.
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*/
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struct tm {
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/*
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* the number of seconds after the minute, normally in the range
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* 0 to 59, but can be up to 60 to allow for leap seconds
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*/
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int tm_sec;
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/* the number of minutes after the hour, in the range 0 to 59*/
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int tm_min;
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/* the number of hours past midnight, in the range 0 to 23 */
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int tm_hour;
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/* the day of the month, in the range 1 to 31 */
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int tm_mday;
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/* the number of months since January, in the range 0 to 11 */
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int tm_mon;
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/* the number of years since 1900 */
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long tm_year;
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/* the number of days since Sunday, in the range 0 to 6 */
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int tm_wday;
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/* the number of days since January 1, in the range 0 to 365 */
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int tm_yday;
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};
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void time_to_tm(time_t totalsecs, int offset, struct tm *result);
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/**
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* timespec_to_ns - Convert timespec to nanoseconds
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* @ts: pointer to the timespec variable to be converted
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*
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* Returns the scalar nanosecond representation of the timespec
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* parameter.
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*/
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static inline s64 timespec_to_ns(const struct timespec *ts)
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{
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return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
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}
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/**
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* timeval_to_ns - Convert timeval to nanoseconds
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* @ts: pointer to the timeval variable to be converted
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*
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* Returns the scalar nanosecond representation of the timeval
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* parameter.
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*/
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static inline s64 timeval_to_ns(const struct timeval *tv)
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{
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return ((s64) tv->tv_sec * NSEC_PER_SEC) +
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tv->tv_usec * NSEC_PER_USEC;
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}
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/**
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* ns_to_timespec - Convert nanoseconds to timespec
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* @nsec: the nanoseconds value to be converted
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*
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* Returns the timespec representation of the nsec parameter.
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*/
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extern struct timespec ns_to_timespec(const s64 nsec);
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/**
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* ns_to_timeval - Convert nanoseconds to timeval
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* @nsec: the nanoseconds value to be converted
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*
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* Returns the timeval representation of the nsec parameter.
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*/
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extern struct timeval ns_to_timeval(const s64 nsec);
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/**
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* timespec_add_ns - Adds nanoseconds to a timespec
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* @a: pointer to timespec to be incremented
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* @ns: unsigned nanoseconds value to be added
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*
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* This must always be inlined because its used from the x86-64 vdso,
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* which cannot call other kernel functions.
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*/
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static __always_inline void timespec_add_ns(struct timespec *a, u64 ns)
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{
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a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns);
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a->tv_nsec = ns;
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}
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#endif
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