forked from Imagelibrary/rtems
6695d02bf0
This change is based on the following FreeBSD commit: "Make timespecadd(3) and friends public The timespecadd(3) family of macros were imported from NetBSD back in r35029. However, they were initially guarded by #ifdef _KERNEL. In the meantime, we have grown at least 28 syscalls that use timespecs in some way, leading many programs both inside and outside of the base system to redefine those macros. It's better just to make the definitions public. Our kernel currently defines two-argument versions of timespecadd and timespecsub. NetBSD, OpenBSD, and FreeDesktop.org's libbsd, however, define three-argument versions. Solaris also defines a three-argument version, but only in its kernel. This revision changes our definition to match the common three-argument version. Bump _FreeBSD_version due to the breaking KPI change. Discussed with: cem, jilles, ian, bde Differential Revision: https://reviews.freebsd.org/D14725" To make the change public (outside #ifdef _KERNEL) it must be integrated in Newlib. Update #3472.
175 lines
6.0 KiB
C
175 lines
6.0 KiB
C
/*-
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* Copyright (c) 2016 embedded brains GmbH
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if !defined(_SYS_TIME_H_) || !defined(_KERNEL)
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#error "must be included via <sys/time.h> in kernel space"
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#endif
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#include <machine/_timecounter.h>
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/* Operations on timespecs */
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#define timespecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
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#define timespecisset(tvp) ((tvp)->tv_sec || (tvp)->tv_nsec)
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#define timespeccmp(tvp, uvp, cmp) \
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(((tvp)->tv_sec == (uvp)->tv_sec) ? \
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((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
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((tvp)->tv_sec cmp (uvp)->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 (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 (0)
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/* Operations on timevals. */
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#define timevalclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
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#define timevalisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
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#define timevalcmp(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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/* timevaladd and timevalsub are not inlined */
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/*
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* Kernel to clock driver interface.
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*/
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void inittodr(time_t base);
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void resettodr(void);
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#define time_second _Timecounter_Time_second
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#define time_uptime _Timecounter_Time_uptime
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extern struct timeval boottime;
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extern struct bintime tc_tick_bt;
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extern sbintime_t tc_tick_sbt;
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extern struct bintime tick_bt;
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extern sbintime_t tick_sbt;
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extern int tc_precexp;
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extern int tc_timepercentage;
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extern struct bintime bt_timethreshold;
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extern struct bintime bt_tickthreshold;
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extern sbintime_t sbt_timethreshold;
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extern sbintime_t sbt_tickthreshold;
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/*
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* Functions for looking at our clock: [get]{bin,nano,micro}[up]time()
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*
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* Functions without the "get" prefix returns the best timestamp
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* we can produce in the given format.
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*
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* "bin" == struct bintime == seconds + 64 bit fraction of seconds.
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* "nano" == struct timespec == seconds + nanoseconds.
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* "micro" == struct timeval == seconds + microseconds.
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*
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* Functions containing "up" returns time relative to boot and
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* should be used for calculating time intervals.
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*
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* Functions without "up" returns UTC time.
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*
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* Functions with the "get" prefix returns a less precise result
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* much faster than the functions without "get" prefix and should
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* be used where a precision of 1/hz seconds is acceptable or where
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* performance is priority. (NB: "precision", _not_ "resolution" !)
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*/
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#define binuptime(_bt) _Timecounter_Binuptime(_bt)
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#define nanouptime(_tsp) _Timecounter_Nanouptime(_tsp)
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#define microuptime(_tvp) _Timecounter_Microuptime(_tvp)
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static __inline sbintime_t
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sbinuptime(void)
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{
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struct bintime _bt;
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binuptime(&_bt);
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return (bttosbt(_bt));
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}
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#define bintime(_bt) _Timecounter_Bintime(_bt)
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#define nanotime(_tsp) _Timecounter_Nanotime(_tsp)
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#define microtime(_tvp) _Timecounter_Microtime(_tvp)
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#define getbinuptime(_bt) _Timecounter_Getbinuptime(_bt)
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#define getnanouptime(_tsp) _Timecounter_Getnanouptime(_tsp)
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#define getmicrouptime(_tvp) _Timecounter_Getmicrouptime(_tvp)
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static __inline sbintime_t
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getsbinuptime(void)
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{
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struct bintime _bt;
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getbinuptime(&_bt);
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return (bttosbt(_bt));
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}
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#define getbintime(_bt) _Timecounter_Getbintime(_bt)
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#define getnanotime(_tsp) _Timecounter_Getnanotime(_tsp)
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#define getmicrotime(_tvp) _Timecounter_Getmicrotime(_tvp)
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#define getboottime(_tvp) _Timecounter_Getboottime(_tvp)
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#define getboottimebin(_bt) _Timecounter_Getboottimebin(_bt)
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/* Other functions */
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int itimerdecr(struct itimerval *itp, int usec);
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int itimerfix(struct timeval *tv);
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int ppsratecheck(struct timeval *, int *, int);
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int ratecheck(struct timeval *, const struct timeval *);
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void timevaladd(struct timeval *t1, const struct timeval *t2);
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void timevalsub(struct timeval *t1, const struct timeval *t2);
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int tvtohz(struct timeval *tv);
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#define TC_DEFAULTPERC 5
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#define BT2FREQ(bt) \
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(((uint64_t)0x8000000000000000 + ((bt)->frac >> 2)) / \
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((bt)->frac >> 1))
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#define SBT2FREQ(sbt) ((SBT_1S + ((sbt) >> 1)) / (sbt))
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#define FREQ2BT(freq, bt) \
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{ \
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(bt)->sec = 0; \
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(bt)->frac = ((uint64_t)0x8000000000000000 / (freq)) << 1; \
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}
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#define TIMESEL(sbt, sbt2) \
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(((sbt2) >= sbt_timethreshold) ? \
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((*(sbt) = getsbinuptime()), 1) : ((*(sbt) = sbinuptime()), 0))
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