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  • /*
     *	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.
     */
    
    #ifndef _LOADAVG_H_
    #define _LOADAVG_H_
    
    /*
     * 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(NetBSD) && !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
    
    #if __FreeBSD__ == 9
    typedef __uint32_t load_avg;
    #else
    typedef fixpt_t load_avg;
    
    #endif							/* __FreeBSD__ == 9 */
    
    
    #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
    
    
    #endif							/* _LOADAVG_H_ */