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/_ffcounter.h

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    1 /*-
    2  * Copyright (c) 2011 The University of Melbourne
    3  * All rights reserved.
    4  *
    5  * This software was developed by Julien Ridoux at the University of Melbourne
    6  * under sponsorship from the FreeBSD Foundation.
    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  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: head/sys/sys/_ffcounter.h 227723 2011-11-19 14:10:16Z lstewart $
   30  */
   31 
   32 #ifndef _SYS__FFCOUNTER_H_
   33 #define _SYS__FFCOUNTER_H_
   34 
   35 /*
   36  * The feed-forward clock counter. The fundamental element of a feed-forward
   37  * clock is a wide monotonically increasing counter that accumulates at the same
   38  * rate as the selected timecounter.
   39  */
   40 typedef uint64_t ffcounter;
   41 
   42 #endif /* _SYS__FFCOUNTER_H_ */

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