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Annotation of src/usr.bin/top/loadavg.h, Revision 1.1

1.1     ! downsj      1: /*     $OpenBSD$       */
        !             2:
        !             3: /*
        !             4:  *  Top - a top users display for Berkeley Unix
        !             5:  *
        !             6:  *  Defines required to access load average figures.
        !             7:  *
        !             8:  *  This include file sets up everything we need to access the load average
        !             9:  *  values in the kernel in a machine independent way.  First, it sets the
        !            10:  *  typedef "load_avg" to be either double or long (depending on what is
        !            11:  *  needed), then it defines these macros appropriately:
        !            12:  *
        !            13:  *     loaddouble(la) - convert load_avg to double.
        !            14:  *     intload(i)     - convert integer to load_avg.
        !            15:  */
        !            16:
        !            17: /*
        !            18:  * We assume that if FSCALE is defined, then avenrun and ccpu are type long.
        !            19:  * If your machine is an exception (mips, perhaps?) then make adjustments
        !            20:  * here.
        !            21:  *
        !            22:  * Defined types:  load_avg for load averages, pctcpu for cpu percentages.
        !            23:  */
        !            24: #if defined(mips) && !defined(NetBSD)
        !            25: # include <sys/fixpoint.h>
        !            26: # if defined(FBITS) && !defined(FSCALE)
        !            27: #  define FSCALE (1 << FBITS)  /* mips */
        !            28: # endif
        !            29: #endif
        !            30:
        !            31: #ifdef FSCALE
        !            32: # define FIXED_LOADAVG FSCALE
        !            33: # define FIXED_PCTCPU FSCALE
        !            34: #endif
        !            35:
        !            36: #ifdef ibm032
        !            37: # undef FIXED_LOADAVG
        !            38: # undef FIXED_PCTCPU
        !            39: # define FIXED_PCTCPU PCT_SCALE
        !            40: #endif
        !            41:
        !            42:
        !            43: #ifdef FIXED_PCTCPU
        !            44:   typedef long pctcpu;
        !            45: # define pctdouble(p) ((double)(p) / FIXED_PCTCPU)
        !            46: #else
        !            47: typedef double pctcpu;
        !            48: # define pctdouble(p) (p)
        !            49: #endif
        !            50:
        !            51: #ifdef FIXED_LOADAVG
        !            52:   typedef long load_avg;
        !            53: # define loaddouble(la) ((double)(la) / FIXED_LOADAVG)
        !            54: # define intload(i) ((int)((i) * FIXED_LOADAVG))
        !            55: #else
        !            56:   typedef double load_avg;
        !            57: # define loaddouble(la) (la)
        !            58: # define intload(i) ((double)(i))
        !            59: #endif