| 2,87 → 2,444 |
|---|
| Written by Geoffrey Noer <noer@cygnus.com> |
| Public domain; no rights reserved. */ |
| |
| /*- |
| * Copyright (c) 1982, 1986, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * @(#)time.h 8.5 (Berkeley) 5/4/95 |
| * $FreeBSD$ |
| */ |
| |
| #ifndef _SYS_TIME_H_ |
| #define _SYS_TIME_H_ |
| |
| #include <_ansi.h> |
| #include <sys/cdefs.h> |
| #include <sys/_timeval.h> |
| #include <sys/types.h> |
| #include <sys/timespec.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #if __BSD_VISIBLE |
| #include <sys/select.h> |
| #endif |
| |
| #ifndef _TIMEVAL_DEFINED |
| #define _TIMEVAL_DEFINED |
| struct timeval { |
| time_t tv_sec; |
| suseconds_t tv_usec; |
| struct timezone { |
| int tz_minuteswest; /* minutes west of Greenwich */ |
| int tz_dsttime; /* type of dst correction */ |
| }; |
| #define DST_NONE 0 /* not on dst */ |
| #define DST_USA 1 /* USA style dst */ |
| #define DST_AUST 2 /* Australian style dst */ |
| #define DST_WET 3 /* Western European dst */ |
| #define DST_MET 4 /* Middle European dst */ |
| #define DST_EET 5 /* Eastern European dst */ |
| #define DST_CAN 6 /* Canada */ |
| |
| /* BSD time macros used by RTEMS code */ |
| #if defined (__rtems__) || defined (__CYGWIN__) |
| #if __BSD_VISIBLE |
| struct bintime { |
| time_t sec; |
| uint64_t frac; |
| }; |
| |
| /* Convenience macros for operations on timevals. |
| NOTE: `timercmp' does not work for >= or <=. */ |
| #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) |
| #define timerclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0) |
| #define timercmp(a, b, CMP) \ |
| (((a)->tv_sec == (b)->tv_sec) ? \ |
| ((a)->tv_usec CMP (b)->tv_usec) : \ |
| ((a)->tv_sec CMP (b)->tv_sec)) |
| #define timeradd(a, b, result) \ |
| static __inline void |
| bintime_addx(struct bintime *_bt, uint64_t _x) |
| { |
| uint64_t _u; |
| |
| _u = _bt->frac; |
| _bt->frac += _x; |
| if (_u > _bt->frac) |
| _bt->sec++; |
| } |
| |
| static __inline void |
| bintime_add(struct bintime *_bt, const struct bintime *_bt2) |
| { |
| uint64_t _u; |
| |
| _u = _bt->frac; |
| _bt->frac += _bt2->frac; |
| if (_u > _bt->frac) |
| _bt->sec++; |
| _bt->sec += _bt2->sec; |
| } |
| |
| static __inline void |
| bintime_sub(struct bintime *_bt, const struct bintime *_bt2) |
| { |
| uint64_t _u; |
| |
| _u = _bt->frac; |
| _bt->frac -= _bt2->frac; |
| if (_u < _bt->frac) |
| _bt->sec--; |
| _bt->sec -= _bt2->sec; |
| } |
| |
| static __inline void |
| bintime_mul(struct bintime *_bt, u_int _x) |
| { |
| uint64_t _p1, _p2; |
| |
| _p1 = (_bt->frac & 0xffffffffull) * _x; |
| _p2 = (_bt->frac >> 32) * _x + (_p1 >> 32); |
| _bt->sec *= _x; |
| _bt->sec += (_p2 >> 32); |
| _bt->frac = (_p2 << 32) | (_p1 & 0xffffffffull); |
| } |
| |
| static __inline void |
| bintime_shift(struct bintime *_bt, int _exp) |
| { |
| |
| if (_exp > 0) { |
| _bt->sec <<= _exp; |
| _bt->sec |= _bt->frac >> (64 - _exp); |
| _bt->frac <<= _exp; |
| } else if (_exp < 0) { |
| _bt->frac >>= -_exp; |
| _bt->frac |= (uint64_t)_bt->sec << (64 + _exp); |
| _bt->sec >>= -_exp; |
| } |
| } |
| |
| #define bintime_clear(a) ((a)->sec = (a)->frac = 0) |
| #define bintime_isset(a) ((a)->sec || (a)->frac) |
| #define bintime_cmp(a, b, cmp) \ |
| (((a)->sec == (b)->sec) ? \ |
| ((a)->frac cmp (b)->frac) : \ |
| ((a)->sec cmp (b)->sec)) |
| |
| #define SBT_1S ((sbintime_t)1 << 32) |
| #define SBT_1M (SBT_1S * 60) |
| #define SBT_1MS (SBT_1S / 1000) |
| #define SBT_1US (SBT_1S / 1000000) |
| #define SBT_1NS (SBT_1S / 1000000000) |
| #define SBT_MAX 0x7fffffffffffffffLL |
| |
| static __inline int |
| sbintime_getsec(sbintime_t _sbt) |
| { |
| |
| return (_sbt >> 32); |
| } |
| |
| static __inline sbintime_t |
| bttosbt(const struct bintime _bt) |
| { |
| |
| return (((sbintime_t)_bt.sec << 32) + (_bt.frac >> 32)); |
| } |
| |
| static __inline struct bintime |
| sbttobt(sbintime_t _sbt) |
| { |
| struct bintime _bt; |
| |
| _bt.sec = _sbt >> 32; |
| _bt.frac = _sbt << 32; |
| return (_bt); |
| } |
| |
| /*- |
| * Background information: |
| * |
| * When converting between timestamps on parallel timescales of differing |
| * resolutions it is historical and scientific practice to round down rather |
| * than doing 4/5 rounding. |
| * |
| * The date changes at midnight, not at noon. |
| * |
| * Even at 15:59:59.999999999 it's not four'o'clock. |
| * |
| * time_second ticks after N.999999999 not after N.4999999999 |
| */ |
| |
| static __inline void |
| bintime2timespec(const struct bintime *_bt, struct timespec *_ts) |
| { |
| |
| _ts->tv_sec = _bt->sec; |
| _ts->tv_nsec = ((uint64_t)1000000000 * |
| (uint32_t)(_bt->frac >> 32)) >> 32; |
| } |
| |
| static __inline void |
| timespec2bintime(const struct timespec *_ts, struct bintime *_bt) |
| { |
| |
| _bt->sec = _ts->tv_sec; |
| /* 18446744073 = int(2^64 / 1000000000) */ |
| _bt->frac = _ts->tv_nsec * (uint64_t)18446744073LL; |
| } |
| |
| static __inline void |
| bintime2timeval(const struct bintime *_bt, struct timeval *_tv) |
| { |
| |
| _tv->tv_sec = _bt->sec; |
| _tv->tv_usec = ((uint64_t)1000000 * (uint32_t)(_bt->frac >> 32)) >> 32; |
| } |
| |
| static __inline void |
| timeval2bintime(const struct timeval *_tv, struct bintime *_bt) |
| { |
| |
| _bt->sec = _tv->tv_sec; |
| /* 18446744073709 = int(2^64 / 1000000) */ |
| _bt->frac = _tv->tv_usec * (uint64_t)18446744073709LL; |
| } |
| |
| static __inline struct timespec |
| sbttots(sbintime_t _sbt) |
| { |
| struct timespec _ts; |
| |
| _ts.tv_sec = _sbt >> 32; |
| _ts.tv_nsec = ((uint64_t)1000000000 * (uint32_t)_sbt) >> 32; |
| return (_ts); |
| } |
| |
| static __inline sbintime_t |
| tstosbt(struct timespec _ts) |
| { |
| |
| return (((sbintime_t)_ts.tv_sec << 32) + |
| (_ts.tv_nsec * (((uint64_t)1 << 63) / 500000000) >> 32)); |
| } |
| |
| static __inline struct timeval |
| sbttotv(sbintime_t _sbt) |
| { |
| struct timeval _tv; |
| |
| _tv.tv_sec = _sbt >> 32; |
| _tv.tv_usec = ((uint64_t)1000000 * (uint32_t)_sbt) >> 32; |
| return (_tv); |
| } |
| |
| static __inline sbintime_t |
| tvtosbt(struct timeval _tv) |
| { |
| |
| return (((sbintime_t)_tv.tv_sec << 32) + |
| (_tv.tv_usec * (((uint64_t)1 << 63) / 500000) >> 32)); |
| } |
| #endif /* __BSD_VISIBLE */ |
| |
| #ifdef _KERNEL |
| |
| /* Operations on timespecs */ |
| #define timespecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0) |
| #define timespecisset(tvp) ((tvp)->tv_sec || (tvp)->tv_nsec) |
| #define timespeccmp(tvp, uvp, cmp) \ |
| (((tvp)->tv_sec == (uvp)->tv_sec) ? \ |
| ((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \ |
| ((tvp)->tv_sec cmp (uvp)->tv_sec)) |
| #define timespecadd(vvp, uvp) \ |
| do { \ |
| (result)->tv_sec = (a)->tv_sec + (b)->tv_sec; \ |
| (result)->tv_usec = (a)->tv_usec + (b)->tv_usec; \ |
| if ((result)->tv_usec >= 1000000) \ |
| { \ |
| ++(result)->tv_sec; \ |
| (result)->tv_usec -= 1000000; \ |
| (vvp)->tv_sec += (uvp)->tv_sec; \ |
| (vvp)->tv_nsec += (uvp)->tv_nsec; \ |
| if ((vvp)->tv_nsec >= 1000000000) { \ |
| (vvp)->tv_sec++; \ |
| (vvp)->tv_nsec -= 1000000000; \ |
| } \ |
| } while (0) |
| #define timersub(a, b, result) \ |
| #define timespecsub(vvp, uvp) \ |
| do { \ |
| (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ |
| (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ |
| if ((result)->tv_usec < 0) { \ |
| --(result)->tv_sec; \ |
| (result)->tv_usec += 1000000; \ |
| (vvp)->tv_sec -= (uvp)->tv_sec; \ |
| (vvp)->tv_nsec -= (uvp)->tv_nsec; \ |
| if ((vvp)->tv_nsec < 0) { \ |
| (vvp)->tv_sec--; \ |
| (vvp)->tv_nsec += 1000000000; \ |
| } \ |
| } while (0) |
| #endif /* defined (__rtems__) || defined (__CYGWIN__) */ |
| #endif /* !_TIMEVAL_DEFINED */ |
| |
| struct timezone { |
| int tz_minuteswest; |
| int tz_dsttime; |
| }; |
| /* Operations on timevals. */ |
| |
| #ifdef __CYGWIN__ |
| #include <cygwin/sys_time.h> |
| #endif /* __CYGWIN__ */ |
| #define timevalclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0) |
| #define timevalisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) |
| #define timevalcmp(tvp, uvp, cmp) \ |
| (((tvp)->tv_sec == (uvp)->tv_sec) ? \ |
| ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ |
| ((tvp)->tv_sec cmp (uvp)->tv_sec)) |
| |
| /* timevaladd and timevalsub are not inlined */ |
| |
| #endif /* _KERNEL */ |
| |
| /* |
| * Names of the interval timers, and structure |
| * defining a timer setting. |
| */ |
| #define ITIMER_REAL 0 |
| #define ITIMER_VIRTUAL 1 |
| #define ITIMER_PROF 2 |
| |
| struct itimerval { |
| struct timeval it_interval; |
| struct timeval it_value; |
| struct timeval it_interval; /* timer interval */ |
| struct timeval it_value; /* current value */ |
| }; |
| |
| #ifdef _COMPILING_NEWLIB |
| int _EXFUN(_gettimeofday, (struct timeval *__p, void *__tz)); |
| #ifdef _KERNEL |
| |
| /* |
| * Kernel to clock driver interface. |
| */ |
| void inittodr(time_t base); |
| void resettodr(void); |
| |
| extern volatile time_t time_second; |
| extern volatile time_t time_uptime; |
| extern struct bintime boottimebin; |
| extern struct timeval boottime; |
| extern struct bintime tc_tick_bt; |
| extern sbintime_t tc_tick_sbt; |
| extern struct bintime tick_bt; |
| extern sbintime_t tick_sbt; |
| extern int tc_precexp; |
| extern int tc_timepercentage; |
| extern struct bintime bt_timethreshold; |
| extern struct bintime bt_tickthreshold; |
| extern sbintime_t sbt_timethreshold; |
| extern sbintime_t sbt_tickthreshold; |
| |
| /* |
| * Functions for looking at our clock: [get]{bin,nano,micro}[up]time() |
| * |
| * Functions without the "get" prefix returns the best timestamp |
| * we can produce in the given format. |
| * |
| * "bin" == struct bintime == seconds + 64 bit fraction of seconds. |
| * "nano" == struct timespec == seconds + nanoseconds. |
| * "micro" == struct timeval == seconds + microseconds. |
| * |
| * Functions containing "up" returns time relative to boot and |
| * should be used for calculating time intervals. |
| * |
| * Functions without "up" returns UTC time. |
| * |
| * Functions with the "get" prefix returns a less precise result |
| * much faster than the functions without "get" prefix and should |
| * be used where a precision of 1/hz seconds is acceptable or where |
| * performance is priority. (NB: "precision", _not_ "resolution" !) |
| */ |
| |
| void binuptime(struct bintime *bt); |
| void nanouptime(struct timespec *tsp); |
| void microuptime(struct timeval *tvp); |
| |
| static __inline sbintime_t |
| sbinuptime(void) |
| { |
| struct bintime _bt; |
| |
| binuptime(&_bt); |
| return (bttosbt(_bt)); |
| } |
| |
| void bintime(struct bintime *bt); |
| void nanotime(struct timespec *tsp); |
| void microtime(struct timeval *tvp); |
| |
| void getbinuptime(struct bintime *bt); |
| void getnanouptime(struct timespec *tsp); |
| void getmicrouptime(struct timeval *tvp); |
| |
| static __inline sbintime_t |
| getsbinuptime(void) |
| { |
| struct bintime _bt; |
| |
| getbinuptime(&_bt); |
| return (bttosbt(_bt)); |
| } |
| |
| void getbintime(struct bintime *bt); |
| void getnanotime(struct timespec *tsp); |
| void getmicrotime(struct timeval *tvp); |
| |
| /* Other functions */ |
| int itimerdecr(struct itimerval *itp, int usec); |
| int itimerfix(struct timeval *tv); |
| int ppsratecheck(struct timeval *, int *, int); |
| int ratecheck(struct timeval *, const struct timeval *); |
| void timevaladd(struct timeval *t1, const struct timeval *t2); |
| void timevalsub(struct timeval *t1, const struct timeval *t2); |
| int tvtohz(struct timeval *tv); |
| |
| #define TC_DEFAULTPERC 5 |
| |
| #define BT2FREQ(bt) \ |
| (((uint64_t)0x8000000000000000 + ((bt)->frac >> 2)) / \ |
| ((bt)->frac >> 1)) |
| |
| #define SBT2FREQ(sbt) ((SBT_1S + ((sbt) >> 1)) / (sbt)) |
| |
| #define FREQ2BT(freq, bt) \ |
| { \ |
| (bt)->sec = 0; \ |
| (bt)->frac = ((uint64_t)0x8000000000000000 / (freq)) << 1; \ |
| } |
| |
| #define TIMESEL(sbt, sbt2) \ |
| (((sbt2) >= sbt_timethreshold) ? \ |
| ((*(sbt) = getsbinuptime()), 1) : ((*(sbt) = sbinuptime()), 0)) |
| |
| #else /* !_KERNEL */ |
| #include <time.h> |
| |
| #include <sys/cdefs.h> |
| |
| __BEGIN_DECLS |
| int _EXFUN(setitimer, (int __which, const struct itimerval *__restrict __value, |
| struct itimerval *__restrict __ovalue)); |
| int _EXFUN(utimes, (const char *__path, const struct timeval *__tvp)); |
| |
| #if __BSD_VISIBLE |
| int _EXFUN(adjtime, (const struct timeval *, struct timeval *)); |
| int _EXFUN(futimes, (int, const struct timeval *)); |
| int _EXFUN(futimesat, (int, const char *, const struct timeval [2])); |
| int _EXFUN(lutimes, (const char *, const struct timeval *)); |
| int _EXFUN(settimeofday, (const struct timeval *, const struct timezone *)); |
| #endif |
| |
| #if __XSI_VISIBLE |
| int _EXFUN(getitimer, (int __which, struct itimerval *__value)); |
| int _EXFUN(gettimeofday, (struct timeval *__restrict __p, |
| void *__restrict __tz)); |
| int _EXFUN(settimeofday, (const struct timeval *, const struct timezone *)); |
| int _EXFUN(utimes, (const char *__path, const struct timeval *__tvp)); |
| int _EXFUN(getitimer, (int __which, struct itimerval *__value)); |
| int _EXFUN(setitimer, (int __which, const struct itimerval *__restrict __value, |
| struct itimerval *__restrict __ovalue)); |
| #endif |
| |
| #ifdef __cplusplus |
| } |
| #ifdef _COMPILING_NEWLIB |
| int _EXFUN(_gettimeofday, (struct timeval *__p, void *__tz)); |
| #endif |
| #endif /* _SYS_TIME_H_ */ |
| |
| __END_DECLS |
| |
| #endif /* !_KERNEL */ |
| |
| #endif /* !_SYS_TIME_H_ */ |