mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-28 14:31:50 +00:00
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/* 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 (clock_t)<<-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 */
|