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      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
     77 typedef 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