forked from mirrors/linux
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
181 lines
4.6 KiB
C
181 lines
4.6 KiB
C
#ifndef _LINUX_TIME_H
|
|
#define _LINUX_TIME_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
#ifdef __KERNEL__
|
|
#include <linux/seqlock.h>
|
|
#endif
|
|
|
|
#ifndef _STRUCT_TIMESPEC
|
|
#define _STRUCT_TIMESPEC
|
|
struct timespec {
|
|
time_t tv_sec; /* seconds */
|
|
long tv_nsec; /* nanoseconds */
|
|
};
|
|
#endif /* _STRUCT_TIMESPEC */
|
|
|
|
struct timeval {
|
|
time_t tv_sec; /* seconds */
|
|
suseconds_t tv_usec; /* microseconds */
|
|
};
|
|
|
|
struct timezone {
|
|
int tz_minuteswest; /* minutes west of Greenwich */
|
|
int tz_dsttime; /* type of dst correction */
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* Parameters used to convert the timespec values */
|
|
#ifndef USEC_PER_SEC
|
|
#define USEC_PER_SEC (1000000L)
|
|
#endif
|
|
|
|
#ifndef NSEC_PER_SEC
|
|
#define NSEC_PER_SEC (1000000000L)
|
|
#endif
|
|
|
|
#ifndef NSEC_PER_USEC
|
|
#define NSEC_PER_USEC (1000L)
|
|
#endif
|
|
|
|
static __inline__ int timespec_equal(struct timespec *a, struct timespec *b)
|
|
{
|
|
return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
|
|
}
|
|
|
|
/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
|
|
* Assumes input in normal date format, i.e. 1980-12-31 23:59:59
|
|
* => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
|
|
*
|
|
* [For the Julian calendar (which was used in Russia before 1917,
|
|
* Britain & colonies before 1752, anywhere else before 1582,
|
|
* and is still in use by some communities) leave out the
|
|
* -year/100+year/400 terms, and add 10.]
|
|
*
|
|
* This algorithm was first published by Gauss (I think).
|
|
*
|
|
* WARNING: this function will overflow on 2106-02-07 06:28:16 on
|
|
* machines were long is 32-bit! (However, as time_t is signed, we
|
|
* will already get problems at other places on 2038-01-19 03:14:08)
|
|
*/
|
|
static inline unsigned long
|
|
mktime (unsigned int year, unsigned int mon,
|
|
unsigned int day, unsigned int hour,
|
|
unsigned int min, unsigned int sec)
|
|
{
|
|
if (0 >= (int) (mon -= 2)) { /* 1..12 -> 11,12,1..10 */
|
|
mon += 12; /* Puts Feb last since it has leap day */
|
|
year -= 1;
|
|
}
|
|
|
|
return (((
|
|
(unsigned long) (year/4 - year/100 + year/400 + 367*mon/12 + day) +
|
|
year*365 - 719499
|
|
)*24 + hour /* now have hours */
|
|
)*60 + min /* now have minutes */
|
|
)*60 + sec; /* finally seconds */
|
|
}
|
|
|
|
extern struct timespec xtime;
|
|
extern struct timespec wall_to_monotonic;
|
|
extern seqlock_t xtime_lock;
|
|
|
|
static inline unsigned long get_seconds(void)
|
|
{
|
|
return xtime.tv_sec;
|
|
}
|
|
|
|
struct timespec current_kernel_time(void);
|
|
|
|
#define CURRENT_TIME (current_kernel_time())
|
|
#define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
|
|
|
|
extern void do_gettimeofday(struct timeval *tv);
|
|
extern int do_settimeofday(struct timespec *tv);
|
|
extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
|
|
extern void clock_was_set(void); // call when ever the clock is set
|
|
extern int do_posix_clock_monotonic_gettime(struct timespec *tp);
|
|
extern long do_nanosleep(struct timespec *t);
|
|
extern long do_utimes(char __user * filename, struct timeval * times);
|
|
struct itimerval;
|
|
extern int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue);
|
|
extern int do_getitimer(int which, struct itimerval *value);
|
|
extern void getnstimeofday (struct timespec *tv);
|
|
|
|
extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
|
|
|
|
static inline void
|
|
set_normalized_timespec (struct timespec *ts, time_t sec, long nsec)
|
|
{
|
|
while (nsec > NSEC_PER_SEC) {
|
|
nsec -= NSEC_PER_SEC;
|
|
++sec;
|
|
}
|
|
while (nsec < 0) {
|
|
nsec += NSEC_PER_SEC;
|
|
--sec;
|
|
}
|
|
ts->tv_sec = sec;
|
|
ts->tv_nsec = nsec;
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#define NFDBITS __NFDBITS
|
|
|
|
#define FD_SETSIZE __FD_SETSIZE
|
|
#define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
|
|
#define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
|
|
#define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
|
|
#define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
|
|
|
|
/*
|
|
* Names of the interval timers, and structure
|
|
* defining a timer setting.
|
|
*/
|
|
#define ITIMER_REAL 0
|
|
#define ITIMER_VIRTUAL 1
|
|
#define ITIMER_PROF 2
|
|
|
|
struct itimerspec {
|
|
struct timespec it_interval; /* timer period */
|
|
struct timespec it_value; /* timer expiration */
|
|
};
|
|
|
|
struct itimerval {
|
|
struct timeval it_interval; /* timer interval */
|
|
struct timeval it_value; /* current value */
|
|
};
|
|
|
|
|
|
/*
|
|
* The IDs of the various system clocks (for POSIX.1b interval timers).
|
|
*/
|
|
#define CLOCK_REALTIME 0
|
|
#define CLOCK_MONOTONIC 1
|
|
#define CLOCK_PROCESS_CPUTIME_ID 2
|
|
#define CLOCK_THREAD_CPUTIME_ID 3
|
|
#define CLOCK_REALTIME_HR 4
|
|
#define CLOCK_MONOTONIC_HR 5
|
|
|
|
/*
|
|
* The IDs of various hardware clocks
|
|
*/
|
|
|
|
|
|
#define CLOCK_SGI_CYCLE 10
|
|
#define MAX_CLOCKS 16
|
|
#define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC | \
|
|
CLOCK_REALTIME_HR | CLOCK_MONOTONIC_HR)
|
|
#define CLOCKS_MONO (CLOCK_MONOTONIC & CLOCK_MONOTONIC_HR)
|
|
|
|
/*
|
|
* The various flags for setting POSIX.1b interval timers.
|
|
*/
|
|
|
|
#define TIMER_ABSTIME 0x01
|
|
|
|
|
|
#endif
|