time.h
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- /* $NetBSD: time.h,v 1.17 1996/02/01 00:10:36 jtc Exp $ */
- /*
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 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 8.2 (Berkeley) 7/10/94
- */
- #ifndef _SYS_TIME_H_
- #define _SYS_TIME_H_
- #include <sys/types.h>
- /*
- * Structure returned by gettimeofday(2) system call,
- * and used in other calls.
- */
- struct timeval {
- long tv_sec; /* seconds */
- long tv_usec; /* and microseconds */
- };
- /*
- * Structure defined by POSIX.1b to be like a timeval.
- */
- struct timespec {
- time_t tv_sec; /* seconds */
- long tv_nsec; /* and nanoseconds */
- };
- #define TIMEVAL_TO_TIMESPEC(tv, ts) {
- (ts)->tv_sec = (tv)->tv_sec;
- (ts)->tv_nsec = (tv)->tv_usec * 1000;
- }
- #define TIMESPEC_TO_TIMEVAL(tv, ts) {
- (tv)->tv_sec = (ts)->tv_sec;
- (tv)->tv_usec = (ts)->tv_nsec / 1000;
- }
- 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 */
- /* Operations on timevals. */
- #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
- #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
- #define timercmp(tvp, uvp, cmp)
- (((tvp)->tv_sec == (uvp)->tv_sec) ?
- ((tvp)->tv_usec cmp (uvp)->tv_usec) :
- ((tvp)->tv_sec cmp (uvp)->tv_sec))
- #define timeradd(tvp, uvp, vvp)
- do {
- (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;
- (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;
- if ((vvp)->tv_usec >= 1000000) {
- (vvp)->tv_sec++;
- (vvp)->tv_usec -= 1000000;
- }
- } while (0)
- #define timersub(tvp, uvp, vvp)
- do {
- (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;
- (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;
- if ((vvp)->tv_usec < 0) {
- (vvp)->tv_sec--;
- (vvp)->tv_usec += 1000000;
- }
- } while (0)
- /*
- * 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; /* timer interval */
- struct timeval it_value; /* current value */
- };
- /*
- * Getkerninfo clock information structure
- */
- struct clockinfo {
- int hz; /* clock frequency */
- int tick; /* micro-seconds per hz tick */
- int tickadj; /* clock skew rate for adjtime() */
- int stathz; /* statistics clock frequency */
- int profhz; /* profiling clock frequency */
- };
- #ifdef _KERNEL
- int itimerfix __P_((struct timeval *tv));
- int itimerdecr __P_((struct itimerval *itp, int usec));
- void microtime __P_((struct timeval *tv));
- #else /* !_KERNEL */
- #include <time.h>
- #ifndef _POSIX_SOURCE
- #include <sys/cdefs.h>
- __BEGIN_DECLS
- int adjtime __P_((const struct timeval *, struct timeval *));
- int getitimer __P_((int, struct itimerval *));
- int gettimeofday __P_((struct timeval *, struct timezone *));
- int setitimer __P_((int, const struct itimerval *, struct itimerval *));
- int settimeofday __P_((const struct timeval *, const struct timezone *));
- int utimes __P_((const char *, const struct timeval *));
- __END_DECLS
- #endif /* !POSIX */
- #endif /* !_KERNEL */
- #endif /* !_SYS_TIME_H_ */