/*-
* 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);
#define COUNTER_U64_SYSINIT(c) \
SYSINIT(c##_counter_sysinit, SI_SUB_COUNTER, \
SI_ORDER_ANY, counter_u64_sysinit, &c); \
SYSUNINIT(c##_counter_sysuninit, SI_SUB_COUNTER, \
SI_ORDER_ANY, counter_u64_sysuninit, &c)
#define COUNTER_U64_DEFINE_EARLY(c) \
counter_u64_t __read_mostly c = EARLY_COUNTER; \
COUNTER_U64_SYSINIT(c)
void counter_u64_sysinit(void *);
void counter_u64_sysuninit(void *);
#endif /* _KERNEL */
#endif /* ! __SYS_COUNTER_H__ */
