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90 lines
3 KiB
C
90 lines
3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __SYS_COUNTER_H__
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#define __SYS_COUNTER_H__
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typedef uint64_t *counter_u64_t;
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#ifdef _KERNEL
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#include <machine/counter.h>
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counter_u64_t counter_u64_alloc(int);
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void counter_u64_free(counter_u64_t);
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void counter_u64_zero(counter_u64_t);
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uint64_t counter_u64_fetch(counter_u64_t);
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#define COUNTER_ARRAY_ALLOC(a, n, wait) do { \
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for (int _i = 0; _i < (n); _i++) \
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(a)[_i] = counter_u64_alloc(wait); \
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} while (0)
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#define COUNTER_ARRAY_FREE(a, n) do { \
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for (int _i = 0; _i < (n); _i++) \
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counter_u64_free((a)[_i]); \
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} while (0)
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#define COUNTER_ARRAY_COPY(a, dstp, n) do { \
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for (int _i = 0; _i < (n); _i++) \
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((uint64_t *)(dstp))[_i] = counter_u64_fetch((a)[_i]);\
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} while (0)
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#define COUNTER_ARRAY_ZERO(a, n) do { \
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for (int _i = 0; _i < (n); _i++) \
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counter_u64_zero((a)[_i]); \
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} while (0)
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/*
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* counter(9) based rate checking.
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*/
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struct counter_rate {
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counter_u64_t cr_rate; /* Events since last second */
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volatile int cr_lock; /* Lock to clean the struct */
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int cr_ticks; /* Ticks on last clean */
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int cr_over; /* Over limit since cr_ticks? */
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};
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int64_t counter_ratecheck(struct counter_rate *, int64_t);
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#define COUNTER_U64_SYSINIT(c) \
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SYSINIT(c##_counter_sysinit, SI_SUB_COUNTER, \
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SI_ORDER_ANY, counter_u64_sysinit, &c); \
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SYSUNINIT(c##_counter_sysuninit, SI_SUB_COUNTER, \
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SI_ORDER_ANY, counter_u64_sysuninit, &c)
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#define COUNTER_U64_DEFINE_EARLY(c) \
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counter_u64_t __read_mostly c = EARLY_COUNTER; \
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COUNTER_U64_SYSINIT(c)
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void counter_u64_sysinit(void *);
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void counter_u64_sysuninit(void *);
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#endif /* _KERNEL */
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#endif /* ! __SYS_COUNTER_H__ */
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