/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef __SYS_COUNTER_H__ #define __SYS_COUNTER_H__ typedef uint64_t *counter_u64_t; #ifdef _KERNEL #include <machine/counter.h> counter_u64_t counter_u64_alloc(int); void counter_u64_free(counter_u64_t); void counter_u64_zero(counter_u64_t); uint64_t counter_u64_fetch(counter_u64_t); #define COUNTER_ARRAY_ALLOC(a, n, wait) do { \ for (int i = 0; i < (n); i++) \ (a)[i] = counter_u64_alloc(wait); \ } while (0) #define COUNTER_ARRAY_FREE(a, n) do { \ for (int i = 0; i < (n); i++) \ counter_u64_free((a)[i]); \ } while (0) #define COUNTER_ARRAY_COPY(a, dstp, n) do { \ for (int i = 0; i < (n); i++) \ ((uint64_t *)(dstp))[i] = counter_u64_fetch((a)[i]);\ } while (0) #define COUNTER_ARRAY_ZERO(a, n) do { \ for (int i = 0; i < (n); i++) \ counter_u64_zero((a)[i]); \ } while (0) /* * counter(9) based rate checking. */ struct counter_rate { counter_u64_t cr_rate; /* Events since last second */ volatile int cr_lock; /* Lock to clean the struct */ int cr_ticks; /* Ticks on last clean */ int cr_over; /* Over limit since cr_ticks? */ }; int64_t counter_ratecheck(struct counter_rate *, int64_t); #endif /* _KERNEL */ #endif /* ! __SYS_COUNTER_H__ */ |