counter.h revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.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 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/sys/sys/counter.h 330897 2018-03-14 03:19:51Z eadler $
29 */
30
31#ifndef __SYS_COUNTER_H__
32#define __SYS_COUNTER_H__
33
34typedef uint64_t *counter_u64_t;
35
36#ifdef _KERNEL
37#include <machine/counter.h>
38
39counter_u64_t	counter_u64_alloc(int);
40void		counter_u64_free(counter_u64_t);
41
42void		counter_u64_zero(counter_u64_t);
43uint64_t	counter_u64_fetch(counter_u64_t);
44
45#define	COUNTER_ARRAY_ALLOC(a, n, wait)	do {			\
46	for (int i = 0; i < (n); i++)				\
47		(a)[i] = counter_u64_alloc(wait);		\
48} while (0)
49
50#define	COUNTER_ARRAY_FREE(a, n)	do {			\
51	for (int i = 0; i < (n); i++)				\
52		counter_u64_free((a)[i]);			\
53} while (0)
54
55#define	COUNTER_ARRAY_COPY(a, dstp, n)	do {			\
56	for (int i = 0; i < (n); i++)				\
57		((uint64_t *)(dstp))[i] = counter_u64_fetch((a)[i]);\
58} while (0)
59
60#define	COUNTER_ARRAY_ZERO(a, n)	do {			\
61	for (int i = 0; i < (n); i++)				\
62		counter_u64_zero((a)[i]);			\
63} while (0)
64#endif	/* _KERNEL */
65#endif	/* ! __SYS_COUNTER_H__ */
66