~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/time.h

Version: ~ [ linux-5.11-rc3 ] ~ [ linux-5.10.7 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.89 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.167 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.215 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.251 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.251 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef _LINUX_TIME_H
  3 #define _LINUX_TIME_H
  4 
  5 # include <linux/cache.h>
  6 # include <linux/seqlock.h>
  7 # include <linux/math64.h>
  8 # include <linux/time64.h>
  9 
 10 extern struct timezone sys_tz;
 11 
 12 int get_timespec64(struct timespec64 *ts,
 13                 const struct __kernel_timespec __user *uts);
 14 int put_timespec64(const struct timespec64 *ts,
 15                 struct __kernel_timespec __user *uts);
 16 int get_itimerspec64(struct itimerspec64 *it,
 17                         const struct __kernel_itimerspec __user *uit);
 18 int put_itimerspec64(const struct itimerspec64 *it,
 19                         struct __kernel_itimerspec __user *uit);
 20 
 21 extern time64_t mktime64(const unsigned int year, const unsigned int mon,
 22                         const unsigned int day, const unsigned int hour,
 23                         const unsigned int min, const unsigned int sec);
 24 
 25 /* Some architectures do not supply their own clocksource.
 26  * This is mainly the case in architectures that get their
 27  * inter-tick times by reading the counter on their interval
 28  * timer. Since these timers wrap every tick, they're not really
 29  * useful as clocksources. Wrapping them to act like one is possible
 30  * but not very efficient. So we provide a callout these arches
 31  * can implement for use with the jiffies clocksource to provide
 32  * finer then tick granular time.
 33  */
 34 #ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
 35 extern u32 (*arch_gettimeoffset)(void);
 36 #endif
 37 
 38 #ifdef CONFIG_POSIX_TIMERS
 39 extern void clear_itimer(void);
 40 #else
 41 static inline void clear_itimer(void) {}
 42 #endif
 43 
 44 extern long do_utimes(int dfd, const char __user *filename, struct timespec64 *times, int flags);
 45 
 46 /*
 47  * Similar to the struct tm in userspace <time.h>, but it needs to be here so
 48  * that the kernel source is self contained.
 49  */
 50 struct tm {
 51         /*
 52          * the number of seconds after the minute, normally in the range
 53          * 0 to 59, but can be up to 60 to allow for leap seconds
 54          */
 55         int tm_sec;
 56         /* the number of minutes after the hour, in the range 0 to 59*/
 57         int tm_min;
 58         /* the number of hours past midnight, in the range 0 to 23 */
 59         int tm_hour;
 60         /* the day of the month, in the range 1 to 31 */
 61         int tm_mday;
 62         /* the number of months since January, in the range 0 to 11 */
 63         int tm_mon;
 64         /* the number of years since 1900 */
 65         long tm_year;
 66         /* the number of days since Sunday, in the range 0 to 6 */
 67         int tm_wday;
 68         /* the number of days since January 1, in the range 0 to 365 */
 69         int tm_yday;
 70 };
 71 
 72 void time64_to_tm(time64_t totalsecs, int offset, struct tm *result);
 73 
 74 # include <linux/time32.h>
 75 
 76 static inline bool itimerspec64_valid(const struct itimerspec64 *its)
 77 {
 78         if (!timespec64_valid(&(its->it_interval)) ||
 79                 !timespec64_valid(&(its->it_value)))
 80                 return false;
 81 
 82         return true;
 83 }
 84 
 85 /**
 86  * time_after32 - compare two 32-bit relative times
 87  * @a:  the time which may be after @b
 88  * @b:  the time which may be before @a
 89  *
 90  * time_after32(a, b) returns true if the time @a is after time @b.
 91  * time_before32(b, a) returns true if the time @b is before time @a.
 92  *
 93  * Similar to time_after(), compare two 32-bit timestamps for relative
 94  * times.  This is useful for comparing 32-bit seconds values that can't
 95  * be converted to 64-bit values (e.g. due to disk format or wire protocol
 96  * issues) when it is known that the times are less than 68 years apart.
 97  */
 98 #define time_after32(a, b)      ((s32)((u32)(b) - (u32)(a)) < 0)
 99 #define time_before32(b, a)     time_after32(a, b)
100 
101 /**
102  * time_between32 - check if a 32-bit timestamp is within a given time range
103  * @t:  the time which may be within [l,h]
104  * @l:  the lower bound of the range
105  * @h:  the higher bound of the range
106  *
107  * time_before32(t, l, h) returns true if @l <= @t <= @h. All operands are
108  * treated as 32-bit integers.
109  *
110  * Equivalent to !(time_before32(@t, @l) || time_after32(@t, @h)).
111  */
112 #define time_between32(t, l, h) ((u32)(h) - (u32)(l) >= (u32)(t) - (u32)(l))
113 #endif
114 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp