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/counter.h

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    1 /*-
    2  * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/11.1/sys/sys/counter.h 256514 2013-10-15 10:05:37Z glebius $
   27  */
   28 
   29 #ifndef __SYS_COUNTER_H__
   30 #define __SYS_COUNTER_H__
   31 
   32 typedef uint64_t *counter_u64_t;
   33 
   34 #ifdef _KERNEL
   35 #include <machine/counter.h>
   36 
   37 counter_u64_t   counter_u64_alloc(int);
   38 void            counter_u64_free(counter_u64_t);
   39 
   40 void            counter_u64_zero(counter_u64_t);
   41 uint64_t        counter_u64_fetch(counter_u64_t);
   42 
   43 #define COUNTER_ARRAY_ALLOC(a, n, wait) do {                    \
   44         for (int i = 0; i < (n); i++)                           \
   45                 (a)[i] = counter_u64_alloc(wait);               \
   46 } while (0)
   47 
   48 #define COUNTER_ARRAY_FREE(a, n)        do {                    \
   49         for (int i = 0; i < (n); i++)                           \
   50                 counter_u64_free((a)[i]);                       \
   51 } while (0)
   52 
   53 #define COUNTER_ARRAY_COPY(a, dstp, n)  do {                    \
   54         for (int i = 0; i < (n); i++)                           \
   55                 ((uint64_t *)(dstp))[i] = counter_u64_fetch((a)[i]);\
   56 } while (0)
   57 
   58 #define COUNTER_ARRAY_ZERO(a, n)        do {                    \
   59         for (int i = 0; i < (n); i++)                           \
   60                 counter_u64_zero((a)[i]);                       \
   61 } while (0)
   62 #endif  /* _KERNEL */
   63 #endif  /* ! __SYS_COUNTER_H__ */

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