Current File : //usr/src/linux-headers-5.15.0-125-generic/include/linux/time.h
/* 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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