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Annotation of 43BSDReno/lib/libU77/dtime_.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  *
                      6:  *     @(#)dtime_.c    5.1     6/7/85
                      7:  */
                      8: 
                      9: /*
                     10:  * Returns the delta time since the last call to dtime.
                     11:  *
                     12:  * calling sequence:
                     13:  *     real time(2)
                     14:  *     call dtime(time)
                     15:  * where:
                     16:  *     the 2 element array time will receive the user and system
                     17:  *     elapsed time since the last call to dtime, or since the start
                     18:  *     of execution.
                     19:  *
                     20:  * This routine can be called as function, and returns the sum of
                     21:  * user and system times. The time_array argument must always be given.
                     22:  *
                     23:  * The resolution for all timing is 1/60 second.
                     24:  */
                     25: 
                     26: #include <sys/types.h>
                     27: #include <sys/times.h>
                     28: 
                     29: struct tb { float usrtime; float systime; };
                     30: 
                     31: time_t dutime=0, dstime=0;
                     32: 
                     33: float
                     34: dtime_(dt) struct tb *dt;
                     35: {      struct tms clock;
                     36: 
                     37:        times(&clock);
                     38:        dt->usrtime = (float)(clock.tms_utime - dutime) / 60.0;
                     39:        dt->systime = (float)(clock.tms_stime - dstime) / 60.0;
                     40:        dutime = clock.tms_utime;
                     41:        dstime = clock.tms_stime;
                     42:        return(dt->usrtime + dt->systime);
                     43: }

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