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/* NetWare can not use this implementation of clock, since it does not

   have times or any similar function.  It provides its own version of

   clock in clib.nlm.  If we can not use clib.nlm, then we must write

   clock in sys/netware.  */

#ifdef CLOCK_PROVIDED

int _dummy_clock = 1;

#else

/*

 * clock.c

 * Original Author:     G. Haley

 *

 * Determines the processor time used by the program since invocation. The time

 * in seconds is the value returned divided by the value of the macro CLK_TCK.

 * If the processor time used is not available, (clock_t) -1 is returned.

 */

/*

FUNCTION

<<clock>>---cumulative processor time

INDEX

        clock

ANSI_SYNOPSIS

        #include <time.h>

        clock_t clock(void);

TRAD_SYNOPSIS

        #include <time.h>

        clock_t clock();

DESCRIPTION

Calculates the best available approximation of the cumulative amount

of time used by your program since it started.  To convert the result

into seconds, divide by the macro <<CLOCKS_PER_SEC>>.

RETURNS

The amount of processor time used so far by your program, in units

defined by the machine-dependent macro <<CLOCKS_PER_SEC>>.  If no

measurement is available, the result is <<-1>>.

PORTABILITY

ANSI C requires <<clock>> and <<CLOCKS_PER_SEC>>.

Supporting OS subroutine required: <<times>>.

*/

#include <time.h>

#include <sys/times.h>

#include <reent.h>

clock_t

clock ()

{

  struct tms tim_s;

  clock_t res;

  if ((res = (clock_t) _times_r (_REENT, &tim_s)) != -1)

    res = (clock_t) (tim_s.tms_utime + tim_s.tms_stime +

                     tim_s.tms_cutime + tim_s.tms_cstime);

  return res;

}

#endif /* CLOCK_PROVIDED */