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91266b96c4
Make the public interface more systematically named. Remove the alternate method, it doesn't do any good, only ruins performance. Add counters to profile the usage of the 8 access functions. Apply the beer-ware to my code. The weird +/- counts are caused by two repocopies behind the scenes: kern/kern_clock.c -> kern/kern_tc.c sys/time.h -> sys/timetc.h (thanks peter!)
223 lines
7.1 KiB
C
223 lines
7.1 KiB
C
/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)time.h 8.5 (Berkeley) 5/4/95
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* $FreeBSD$
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*/
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#ifndef _SYS_TIME_H_
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#define _SYS_TIME_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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long tv_sec; /* seconds */
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long tv_usec; /* and microseconds */
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};
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#ifndef _TIMESPEC_DECLARED
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#define _TIMESPEC_DECLARED
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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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#endif
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#define TIMEVAL_TO_TIMESPEC(tv, ts) \
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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 (0)
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#define TIMESPEC_TO_TIMEVAL(tv, ts) \
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do { \
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(tv)->tv_sec = (ts)->tv_sec; \
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(tv)->tv_usec = (ts)->tv_nsec / 1000; \
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} while (0)
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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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#define DST_NONE 0 /* not on dst */
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#define DST_USA 1 /* USA style dst */
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#define DST_AUST 2 /* Australian style dst */
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#define DST_WET 3 /* Western European dst */
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#define DST_MET 4 /* Middle European dst */
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#define DST_EET 5 /* Eastern European dst */
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#define DST_CAN 6 /* Canada */
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#ifdef _KERNEL
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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(vvp, uvp) \
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do { \
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(vvp)->tv_sec += (uvp)->tv_sec; \
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(vvp)->tv_nsec += (uvp)->tv_nsec; \
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if ((vvp)->tv_nsec >= 1000000000) { \
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(vvp)->tv_sec++; \
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(vvp)->tv_nsec -= 1000000000; \
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} \
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} while (0)
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#define timespecsub(vvp, uvp) \
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do { \
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(vvp)->tv_sec -= (uvp)->tv_sec; \
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(vvp)->tv_nsec -= (uvp)->tv_nsec; \
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if ((vvp)->tv_nsec < 0) { \
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(vvp)->tv_sec--; \
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(vvp)->tv_nsec += 1000000000; \
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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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#endif /* _KERNEL */
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#ifndef _KERNEL /* NetBSD/OpenBSD compatable interfaces */
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#define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
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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 (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 (0)
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#endif
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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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* Getkerninfo clock information structure
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*/
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struct clockinfo {
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int hz; /* clock frequency */
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int tick; /* micro-seconds per hz tick */
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int tickadj; /* clock skew rate for adjtime() */
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int stathz; /* statistics clock frequency */
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int profhz; /* profiling clock frequency */
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};
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/* CLOCK_REALTIME and TIMER_ABSTIME are supposed to be in time.h */
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#ifndef CLOCK_REALTIME
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#define CLOCK_REALTIME 0
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#endif
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#define CLOCK_VIRTUAL 1
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#define CLOCK_PROF 2
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#define TIMER_RELTIME 0x0 /* relative timer */
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#ifndef TIMER_ABSTIME
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#define TIMER_ABSTIME 0x1 /* absolute timer */
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#endif
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#ifdef _KERNEL
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extern time_t time_second;
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void getmicrouptime __P((struct timeval *tv));
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void getmicrotime __P((struct timeval *tv));
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void getnanouptime __P((struct timespec *tv));
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void getnanotime __P((struct timespec *tv));
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int itimerdecr __P((struct itimerval *itp, int usec));
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int itimerfix __P((struct timeval *tv));
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void microuptime __P((struct timeval *tv));
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void microtime __P((struct timeval *tv));
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void nanouptime __P((struct timespec *ts));
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void nanotime __P((struct timespec *ts));
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void timevaladd __P((struct timeval *, struct timeval *));
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void timevalsub __P((struct timeval *, struct timeval *));
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int tvtohz __P((struct timeval *));
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#else /* !_KERNEL */
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#include <time.h>
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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int adjtime __P((const struct timeval *, struct timeval *));
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int futimes __P((int, const struct timeval *));
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int getitimer __P((int, struct itimerval *));
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int gettimeofday __P((struct timeval *, struct timezone *));
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int lutimes __P((const char *, const struct timeval *));
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int setitimer __P((int, const struct itimerval *, struct itimerval *));
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int settimeofday __P((const struct timeval *, const struct timezone *));
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int utimes __P((const char *, const struct timeval *));
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* !_SYS_TIME_H_ */
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