The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/clock.h

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    1 /*-
    2  * Copyright (c) 1996 The NetBSD Foundation, Inc.
    3  * All rights reserved.
    4  *
    5  * This code is derived from software contributed to The NetBSD Foundation
    6  * by Gordon W. Ross
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *        This product includes software developed by the NetBSD
   19  *        Foundation, Inc. and its contributors.
   20  * 4. Neither the name of The NetBSD Foundation nor the names of its
   21  *    contributors may be used to endorse or promote products derived
   22  *    from this software without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   25  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   26  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   27  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   32  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   33  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   34  * POSSIBILITY OF SUCH DAMAGE.
   35  *
   36  *      $NetBSD: clock_subr.h,v 1.7 2000/10/03 13:41:07 tsutsui Exp $
   37  *
   38  * $FreeBSD: src/sys/sys/clock.h,v 1.1 2002/04/04 23:39:08 tmm Exp $
   39  */
   40 
   41 #ifndef _SYS_CLOCK_H_
   42 #define _SYS_CLOCK_H_
   43 
   44 /*
   45  * Structure to hold the values typically reported by time-of-day clocks.
   46  * This can be passed to the generic conversion functions to be converted
   47  * to a struct timespec.
   48  */
   49 struct clocktime {
   50         int     year;                   /* year - 1900 */
   51         int     mon;                    /* month (1 - 12) */
   52         int     day;                    /* day (1 - 31) */
   53         int     hour;                   /* hour (0 - 23) */
   54         int     min;                    /* minute (0 - 59) */
   55         int     sec;                    /* second (0 - 59) */
   56         int     dow;                    /* day of week (0 - 6; 0 = Sunday) */
   57         long    nsec;                   /* nano seconds */
   58 };
   59 
   60 int clock_ct_to_ts(struct clocktime *, struct timespec *);
   61 void clock_ts_to_ct(struct timespec *, struct clocktime *);
   62 void clock_register(device_t, long);
   63 
   64 /*
   65  * BCD to decimal and decimal to BCD.
   66  */
   67 #define FROMBCD(x)      (((x) >> 4) * 10 + ((x) & 0xf))
   68 #define TOBCD(x)        (((x) / 10 * 16) + ((x) % 10))
   69 
   70 /* Some handy constants. */
   71 #define SECDAY          (24 * 60 * 60)
   72 #define SECYR           (SECDAY * 365)
   73 
   74 /* Traditional POSIX base year */
   75 #define POSIX_BASE_YEAR 1970
   76 
   77 #endif /* !_SYS_CLOCK_H_ */

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