evcount.h

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    1 /*      $OpenBSD: evcount.h,v 1.4 2022/11/10 07:05:41 jmatthew Exp $ */
    2 /*
    3  * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
    4  * Copyright (c) 2004 Aaron Campbell <aaron@openbsd.org>
    5  * 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  *
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. The name of the author may not be used to endorse or promote products
   14  *    derived from this software without specific prior written permission.
   15  *
   16  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
   17  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
   18  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
   19  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   20  * EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  */
   27 
   28 #ifndef __SYS_EVCOUNT_H__
   29 #define __SYS_EVCOUNT_H__
   30 
   31 #ifdef _KERNEL
   32 
   33 #include <sys/queue.h>
   34 
   35 struct cpumem;
   36 
   37 struct evcount {
   38         u_int64_t               ec_count;       /* main counter */
   39         int                     ec_id;          /* counter ID */
   40         const char              *ec_name;       /* counter name */
   41         void                    *ec_data;       /* user data */
   42         struct cpumem           *ec_percpu;     /* per-cpu counter */
   43 
   44         TAILQ_ENTRY(evcount)    next;
   45 };
   46 
   47 void evcount_attach(struct evcount *, const char *, void *);
   48 void evcount_detach(struct evcount *);
   49 void evcount_inc(struct evcount *);
   50 void evcount_init_percpu(void);
   51 void evcount_percpu(struct evcount *);
   52 int evcount_sysctl(int *, u_int, void *, size_t *, void *, size_t);
   53 
   54 #endif /* _KERNEL */
   55 
   56 #endif

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

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