OpenBSD-4.6/usr.bin/top/loadavg.h

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/*	$OpenBSD: loadavg.h,v 1.3 2002/07/15 17:20:36 deraadt Exp $	*/

/*
 *  Top users/processes display for Unix
 *  Version 3
 *
 * Copyright (c) 1984, 1989, William LeFebvre, Rice University
 * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
 *
 * 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 ``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 HIS EMPLOYER 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.
 */

/*
 *  Top - a top users display for Berkeley Unix
 *
 *  Defines required to access load average figures.
 *
 *  This include file sets up everything we need to access the load average
 *  values in the kernel in a machine independent way.  First, it sets the
 *  typedef "load_avg" to be either double or long (depending on what is
 *  needed), then it defines these macros appropriately:
 *
 *	loaddouble(la) - convert load_avg to double.
 *	intload(i)     - convert integer to load_avg.
 */

/*
 * We assume that if FSCALE is defined, then avenrun and ccpu are type long.
 * If your machine is an exception (mips, perhaps?) then make adjustments
 * here.
 *
 * Defined types:  load_avg for load averages, pctcpu for cpu percentages.
 */
#if defined(mips) && !defined(__OpenBSD__)
# include <sys/fixpoint.h>
# if defined(FBITS) && !defined(FSCALE)
#  define FSCALE (1 << FBITS)	/* mips */
# endif
#endif

#ifdef FSCALE
# define FIXED_LOADAVG FSCALE
# define FIXED_PCTCPU FSCALE
#endif

#ifdef ibm032
# undef FIXED_LOADAVG
# undef FIXED_PCTCPU
# define FIXED_PCTCPU PCT_SCALE
#endif


#ifdef FIXED_PCTCPU
  typedef long pctcpu;
# define pctdouble(p) ((double)(p) / FIXED_PCTCPU)
#else
typedef double pctcpu;
# define pctdouble(p) (p)
#endif

#ifdef FIXED_LOADAVG
  typedef long load_avg;
# define loaddouble(la) ((double)(la) / FIXED_LOADAVG)
# define intload(i) ((int)((i) * FIXED_LOADAVG))
#else
  typedef double load_avg;
# define loaddouble(la) (la)
# define intload(i) ((double)(i))
#endif