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99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: clock_subr.h,v 1.7 2000/10/03 13:41:07 tsutsui Exp $
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*
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*
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* This file is the central clearing-house for calendrical issues.
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*
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* In general the kernel does not know about minutes, hours, days, timezones,
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* daylight savings time, leap-years and such. All that is theoretically a
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* matter for userland only.
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*
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* Parts of kernel code does however care: badly designed filesystems store
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* timestamps in local time and RTC chips sometimes track time in a local
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* timezone instead of UTC and so on.
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*
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* All that code should go here for service.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_CLOCK_H_
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#define _SYS_CLOCK_H_
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#ifdef _KERNEL /* No user serviceable parts */
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/*
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* Timezone info from settimeofday(2), usually not used
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*/
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extern int tz_minuteswest;
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extern int tz_dsttime;
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int utc_offset(void);
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/*
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* Structure to hold the values typically reported by time-of-day clocks.
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* This can be passed to the generic conversion functions to be converted
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* to a struct timespec.
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*/
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struct clocktime {
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int year; /* year (4 digit year) */
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int mon; /* month (1 - 12) */
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int day; /* day (1 - 31) */
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int hour; /* hour (0 - 23) */
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int min; /* minute (0 - 59) */
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int sec; /* second (0 - 59) */
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int dow; /* day of week (0 - 6; 0 = Sunday) */
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long nsec; /* nano seconds */
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};
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int clock_ct_to_ts(struct clocktime *, struct timespec *);
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void clock_ts_to_ct(struct timespec *, struct clocktime *);
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void clock_register(device_t, long);
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/*
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* BCD to decimal and decimal to BCD.
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*/
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#define FROMBCD(x) bcd2bin(x)
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#define TOBCD(x) bin2bcd(x)
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/* Some handy constants. */
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#define SECDAY (24 * 60 * 60)
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#define SECYR (SECDAY * 365)
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/* Traditional POSIX base year */
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#define POSIX_BASE_YEAR 1970
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void timespec2fattime(struct timespec *tsp, int utc, u_int16_t *ddp, u_int16_t *dtp, u_int8_t *dhp);
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void fattime2timespec(unsigned dd, unsigned dt, unsigned dh, int utc, struct timespec *tsp);
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#endif /* _KERNEL */
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#endif /* !_SYS_CLOCK_H_ */
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