1/*-
2 * Copyright (c) 2013-2014 Devin Teske <dteske@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#ifndef _DPV_UTIL_H_
30#define _DPV_UTIL_H_
31
32/* Limits */
33#define BUFSIZE_MAX		(2 * 1024 * 1024)
34					/* Buffer size for read(2) input */
35#ifndef MAXPHYS
36#define MAXPHYS			(128 * 1024)
37					/* max raw I/O transfer size */
38#endif
39
40/*
41 * Memory strategry threshold, in pages: if physmem is larger than this,
42 * use a large buffer.
43 */
44#define PHYSPAGES_THRESHOLD	(32 * 1024)
45
46/*
47 * Small (default) buffer size in bytes. It's inefficient for this to be
48 * smaller than MAXPHYS.
49 */
50#define BUFSIZE_SMALL		(MAXPHYS)
51
52/*
53 * Math macros
54 */
55#undef  MIN
56#define MIN(x,y) ((x) < (y) ? (x) : (y))
57#undef  MAX
58#define MAX(x,y) ((x) > (y) ? (x) : (y))
59
60/*
61 * Extra display information
62 */
63#define BYTE_STATUS_SOLO	"%'10lli bytes read @ %'9.1f bytes/sec."
64#define BYTE_STATUS_MANY	(BYTE_STATUS_SOLO " [%i/%i busy/wait]")
65#define LINE_STATUS_SOLO	"%'10lli lines read @ %'9.1f lines/sec."
66#define LINE_STATUS_MANY	(LINE_STATUS_SOLO " [%i/%i busy/wait]")
67
68#endif /* !_DPV_UTIL_H_ */
69