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 57