267 lines
7.0 KiB
C
267 lines
7.0 KiB
C
#ifndef _SYS_TIME_H_
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#define _SYS_TIME_H_
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#include <sys/featuretest.h>
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#include <sys/types.h>
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/*
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* Structure returned by gettimeofday(2) system call,
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* and used in other calls.
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*/
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struct timeval {
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time_t tv_sec; /* seconds */
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suseconds_t tv_usec; /* and microseconds */
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};
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/*
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* Structure defined by POSIX.1b to be like a timeval.
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*/
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struct timespec {
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time_t tv_sec; /* seconds */
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long tv_nsec; /* and nanoseconds */
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};
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#if defined(_NETBSD_SOURCE)
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#define TIMEVAL_TO_TIMESPEC(tv, ts) do { \
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(ts)->tv_sec = (tv)->tv_sec; \
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(ts)->tv_nsec = (tv)->tv_usec * 1000; \
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} while (/*CONSTCOND*/0)
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#define TIMESPEC_TO_TIMEVAL(tv, ts) do { \
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(tv)->tv_sec = (ts)->tv_sec; \
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(tv)->tv_usec = (suseconds_t)(ts)->tv_nsec / 1000; \
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} while (/*CONSTCOND*/0)
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/*
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* Note: timezone is obsolete. All timezone handling is now in
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* userland. Its just here for back compatibility.
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*/
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struct timezone {
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int tz_minuteswest; /* minutes west of Greenwich */
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int tz_dsttime; /* type of dst correction */
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};
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/* Operations on timevals. */
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#define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0L
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#define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
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#define timercmp(tvp, uvp, cmp) \
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(((tvp)->tv_sec == (uvp)->tv_sec) ? \
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((tvp)->tv_usec cmp (uvp)->tv_usec) : \
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((tvp)->tv_sec cmp (uvp)->tv_sec))
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#define timeradd(tvp, uvp, vvp) \
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do { \
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(vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
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(vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
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if ((vvp)->tv_usec >= 1000000) { \
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(vvp)->tv_sec++; \
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(vvp)->tv_usec -= 1000000; \
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} \
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} while (/* CONSTCOND */ 0)
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#define timersub(tvp, uvp, vvp) \
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do { \
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(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
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(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
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if ((vvp)->tv_usec < 0) { \
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(vvp)->tv_sec--; \
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(vvp)->tv_usec += 1000000; \
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} \
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} while (/* CONSTCOND */ 0)
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/*
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* hide bintime for _STANDALONE because this header is used for hpcboot.exe,
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* which is built with compilers which don't recognize LL suffix.
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* http://mail-index.NetBSD.org/tech-userlevel/2008/02/27/msg000181.html
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*/
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#if !defined(_STANDALONE)
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struct bintime {
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time_t sec;
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uint64_t frac;
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};
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static __inline void
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bintime_addx(struct bintime *bt, uint64_t x)
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{
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uint64_t u;
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u = bt->frac;
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bt->frac += x;
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if (u > bt->frac)
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bt->sec++;
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}
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static __inline void
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bintime_add(struct bintime *bt, const struct bintime *bt2)
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{
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uint64_t u;
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u = bt->frac;
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bt->frac += bt2->frac;
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if (u > bt->frac)
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bt->sec++;
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bt->sec += bt2->sec;
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}
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static __inline void
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bintime_sub(struct bintime *bt, const struct bintime *bt2)
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{
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uint64_t u;
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u = bt->frac;
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bt->frac -= bt2->frac;
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if (u < bt->frac)
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bt->sec--;
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bt->sec -= bt2->sec;
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}
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/*-
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* Background information:
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*
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* When converting between timestamps on parallel timescales of differing
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* resolutions it is historical and scientific practice to round down rather
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* than doing 4/5 rounding.
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*
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* The date changes at midnight, not at noon.
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*
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* Even at 15:59:59.999999999 it's not four'o'clock.
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*
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* time_second ticks after N.999999999 not after N.4999999999
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*/
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static __inline void
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bintime2timespec(const struct bintime *bt, struct timespec *ts)
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{
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ts->tv_sec = bt->sec;
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ts->tv_nsec =
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(long)(((uint64_t)1000000000 * (uint32_t)(bt->frac >> 32)) >> 32);
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}
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static __inline void
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timespec2bintime(const struct timespec *ts, struct bintime *bt)
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{
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bt->sec = ts->tv_sec;
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/* 18446744073 = int(2^64 / 1000000000) */
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bt->frac = ts->tv_nsec * (uint64_t)18446744073LL;
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}
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static __inline void
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bintime2timeval(const struct bintime *bt, struct timeval *tv)
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{
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tv->tv_sec = bt->sec;
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tv->tv_usec =
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(suseconds_t)(((uint64_t)1000000 * (uint32_t)(bt->frac >> 32)) >> 32);
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}
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static __inline void
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timeval2bintime(const struct timeval *tv, struct bintime *bt)
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{
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bt->sec = tv->tv_sec;
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/* 18446744073709 = int(2^64 / 1000000) */
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bt->frac = tv->tv_usec * (uint64_t)18446744073709LL;
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}
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#endif /* !defined(_STANDALONE) */
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/* Operations on timespecs. */
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#define timespecclear(tsp) (tsp)->tv_sec = (time_t)((tsp)->tv_nsec = 0L)
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#define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec)
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#define timespeccmp(tsp, usp, cmp) \
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(((tsp)->tv_sec == (usp)->tv_sec) ? \
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((tsp)->tv_nsec cmp (usp)->tv_nsec) : \
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((tsp)->tv_sec cmp (usp)->tv_sec))
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#define timespecadd(tsp, usp, vsp) \
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do { \
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(vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \
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(vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \
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if ((vsp)->tv_nsec >= 1000000000L) { \
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(vsp)->tv_sec++; \
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(vsp)->tv_nsec -= 1000000000L; \
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} \
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} while (/* CONSTCOND */ 0)
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#define timespecsub(tsp, usp, vsp) \
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do { \
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(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
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(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
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if ((vsp)->tv_nsec < 0) { \
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(vsp)->tv_sec--; \
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(vsp)->tv_nsec += 1000000000L; \
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} \
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} while (/* CONSTCOND */ 0)
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#define timespec2ns(x) (((uint64_t)(x)->tv_sec) * 1000000000L + (x)->tv_nsec)
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#endif /* _NETBSD_SOURCE */
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/*
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* Names of the interval timers, and structure
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* defining a timer setting.
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*/
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#define ITIMER_REAL 0
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#define ITIMER_VIRTUAL 1
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#define ITIMER_PROF 2
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struct itimerval {
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struct timeval it_interval; /* timer interval */
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struct timeval it_value; /* current value */
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};
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/*
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* Structure defined by POSIX.1b to be like a itimerval, but with
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* timespecs. Used in the timer_*() system calls.
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*/
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struct itimerspec {
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struct timespec it_interval;
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struct timespec it_value;
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};
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#ifndef __minix
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#define CLOCK_REALTIME 0
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#define CLOCK_VIRTUAL 1
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#define CLOCK_PROF 2
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#define CLOCK_MONOTONIC 3
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#endif
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#if defined(_NETBSD_SOURCE)
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#define TIMER_RELTIME 0x0 /* relative timer */
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#endif
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#define TIMER_ABSTIME 0x1 /* absolute timer */
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#ifdef _KERNEL
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#include <sys/timevar.h>
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#else /* !_KERNEL */
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#ifndef _STANDALONE
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#if (_POSIX_C_SOURCE - 0) >= 200112L || \
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(defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
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(_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
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#include <sys/select.h>
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#endif
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#include <sys/cdefs.h>
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#include <time.h>
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__BEGIN_DECLS
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#ifndef __LIBC12_SOURCE__
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#if (_POSIX_C_SOURCE - 0) >= 200112L || \
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defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
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int getitimer(int, struct itimerval *) __RENAME(__getitimer50);
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int gettimeofday(struct timeval * __restrict, void *__restrict);
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int setitimer(int, const struct itimerval * __restrict,
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struct itimerval * __restrict) __RENAME(__setitimer50);
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#endif /* _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE || _NETBSD_SOURCE */
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#if defined(_NETBSD_SOURCE) || defined(HAVE_NBTOOL_CONFIG_H)
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#ifndef __minix
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int adjtime(const struct timeval *, struct timeval *) __RENAME(__adjtime50);
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int futimes(int, const struct timeval [2]) __RENAME(__futimes50);
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int lutimes(const char *, const struct timeval [2]) __RENAME(__lutimes50);
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#endif /* !__minix */
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int settimeofday(const struct timeval * __restrict,
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const void *__restrict) __RENAME(__settimeofday50);
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#endif /* _NETBSD_SOURCE */
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#endif /* __LIBC12_SOURCE__ */
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__END_DECLS
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#endif /* !_STANDALONE */
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#endif /* !_KERNEL */
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#endif /* !_SYS_TIME_H_ */
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