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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _LINUX_TIME_H
- #define _LINUX_TIME_H
- # include <linux/cache.h>
- # include <linux/math64.h>
- # include <linux/time64.h>
- extern struct timezone sys_tz;
- int get_timespec64(struct timespec64 *ts,
- const struct __kernel_timespec __user *uts);
- int put_timespec64(const struct timespec64 *ts,
- struct __kernel_timespec __user *uts);
- int get_itimerspec64(struct itimerspec64 *it,
- const struct __kernel_itimerspec __user *uit);
- int put_itimerspec64(const struct itimerspec64 *it,
- struct __kernel_itimerspec __user *uit);
- extern time64_t mktime64(const unsigned int year, const unsigned int mon,
- const unsigned int day, const unsigned int hour,
- const unsigned int min, const unsigned int sec);
- #ifdef CONFIG_POSIX_TIMERS
- extern void clear_itimer(void);
- #else
- static inline void clear_itimer(void) {}
- #endif
- extern long do_utimes(int dfd, const char __user *filename, struct timespec64 *times, int flags);
- /*
- * Similar to the struct tm in userspace <time.h>, 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 time64_to_tm(time64_t totalsecs, int offset, struct tm *result);
- # include <linux/time32.h>
- static inline bool itimerspec64_valid(const struct itimerspec64 *its)
- {
- if (!timespec64_valid(&(its->it_interval)) ||
- !timespec64_valid(&(its->it_value)))
- return false;
- return true;
- }
- /**
- * time_after32 - compare two 32-bit relative times
- * @a: the time which may be after @b
- * @b: the time which may be before @a
- *
- * time_after32(a, b) returns true if the time @a is after time @b.
- * time_before32(b, a) returns true if the time @b is before time @a.
- *
- * Similar to time_after(), compare two 32-bit timestamps for relative
- * times. This is useful for comparing 32-bit seconds values that can't
- * be converted to 64-bit values (e.g. due to disk format or wire protocol
- * issues) when it is known that the times are less than 68 years apart.
- */
- #define time_after32(a, b) ((s32)((u32)(b) - (u32)(a)) < 0)
- #define time_before32(b, a) time_after32(a, b)
- /**
- * time_between32 - check if a 32-bit timestamp is within a given time range
- * @t: the time which may be within [l,h]
- * @l: the lower bound of the range
- * @h: the higher bound of the range
- *
- * time_before32(t, l, h) returns true if @l <= @t <= @h. All operands are
- * treated as 32-bit integers.
- *
- * Equivalent to !(time_before32(@t, @l) || time_after32(@t, @h)).
- */
- #define time_between32(t, l, h) ((u32)(h) - (u32)(l) >= (u32)(t) - (u32)(l))
- # include <vdso/time.h>
- #endif
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