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/timespec.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1982, 1986, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)time.h      8.5 (Berkeley) 5/4/95
   32  * from: FreeBSD: src/sys/sys/time.h,v 1.43 2000/03/20 14:09:05 phk Exp
   33  *      $FreeBSD$
   34  */
   35 
   36 #ifndef _SYS_TIMESPEC_H_
   37 #define _SYS_TIMESPEC_H_
   38 
   39 #include <sys/cdefs.h>
   40 #include <sys/_timespec.h>
   41 
   42 #if __BSD_VISIBLE
   43 #define TIMEVAL_TO_TIMESPEC(tv, ts)                                     \
   44         do {                                                            \
   45                 (ts)->tv_sec = (tv)->tv_sec;                            \
   46                 (ts)->tv_nsec = (tv)->tv_usec * 1000;                   \
   47         } while (0)
   48 #define TIMESPEC_TO_TIMEVAL(tv, ts)                                     \
   49         do {                                                            \
   50                 (tv)->tv_sec = (ts)->tv_sec;                            \
   51                 (tv)->tv_usec = (ts)->tv_nsec / 1000;                   \
   52         } while (0)
   53 
   54 #endif /* __BSD_VISIBLE */
   55 
   56 /*
   57  * Structure defined by POSIX.1b to be like a itimerval, but with
   58  * timespecs. Used in the timer_*() system calls.
   59  */
   60 struct itimerspec {
   61         struct timespec  it_interval;
   62         struct timespec  it_value;
   63 };
   64 
   65 #endif /* _SYS_TIMESPEC_H_ */

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