116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/*
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* Copyright (c) 1986 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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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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/*
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* Structure defined by POSIX.4 to be like a timeval but with nanoseconds
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* instead of microseconds. Silly on a PDP-11 but keeping the names the
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* same makes life simpler than changing the names.
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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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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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/*
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* Operations on timevals.
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*
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* NB: timercmp does not work for >= or <=.
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*/
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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 cmp (uvp)->tv_sec || \
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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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#define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
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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 k_itimerval {
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long it_interval; /* timer interval */
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long it_value; /* current value */
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};
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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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#ifdef KERNEL
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/*
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* Round up a proposed time value to a minimal resolution of the clock.
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*/
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int itimerfix (struct timeval *tv);
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/*
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* Add and subtract routines for timevals.
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*/
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void timevaladd (struct timeval *t1, struct timeval *t2);
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void timevalsub (struct timeval *t1, struct timeval *t2);
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/*
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* Compute number of hz until specified time.
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*/
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int hzto (struct timeval *tv);
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#else
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#include <time.h>
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int gettimeofday (struct timeval *tv, struct timezone *tz);
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int utimes (const char *filename, const struct timeval times[2]);
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int getitimer (int which, struct itimerval *curr_value);
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int setitimer (int which, const struct itimerval *new_value,
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struct itimerval *old_value);
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int getpriority (int which, int who);
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int setpriority (int which, int who, int prio);
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char *tztab (int zone, int dst);
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#endif
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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 stathz; /* statistics clock frequency */
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int profhz; /* profiling clock frequency */
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};
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extern unsigned int msec();
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#endif /* !_SYS_TIME_H_ */
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