1/*
2 * Copyright (c) 1984 through 2008, William LeFebvre
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 are met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *
16 *     * Neither the name of William LeFebvre nor the names of other
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/*
34 *  Top - a top users display for Berkeley Unix
35 *
36 *  Defines required to access load average figures.
37 *
38 *  This include file sets up everything we need to access the load average
39 *  values in the kernel in a machine independent way.  First, it sets the
40 *  typedef "load_avg" to be either double or long (depending on what is
41 *  needed), then it defines these macros appropriately:
42 *
43 *	loaddouble(la) - convert load_avg to double.
44 *	intload(i)     - convert integer to load_avg.
45 */
46
47/*
48 * We assume that if FSCALE is defined, then avenrun and ccpu are type long.
49 * If your machine is an exception (mips, perhaps?) then make adjustments
50 * here.
51 *
52 * Defined types:  load_avg for load averages, pctcpu for cpu percentages.
53 */
54#if defined(mips) && !defined(NetBSD)
55# include <sys/fixpoint.h>
56# if defined(FBITS) && !defined(FSCALE)
57#  define FSCALE (1 << FBITS)	/* mips */
58# endif
59#endif
60
61#ifdef FSCALE
62# define FIXED_LOADAVG FSCALE
63# define FIXED_PCTCPU FSCALE
64#endif
65
66#ifdef ibm032
67# undef FIXED_LOADAVG
68# undef FIXED_PCTCPU
69# define FIXED_PCTCPU PCT_SCALE
70#endif
71
72
73#ifdef FIXED_PCTCPU
74  typedef long pctcpu;
75# define pctdouble(p) ((double)(p) / FIXED_PCTCPU)
76#else
77typedef double pctcpu;
78# define pctdouble(p) (p)
79#endif
80
81#ifdef FIXED_LOADAVG
82  typedef long load_avg;
83# define loaddouble(la) ((double)(la) / FIXED_LOADAVG)
84# define intload(i) ((int)((i) * FIXED_LOADAVG))
85#else
86  typedef double load_avg;
87# define loaddouble(la) (la)
88# define intload(i) ((double)(i))
89#endif
90