[thirdparty/glibc.git] / time / clocktest.c

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>

volatile int gotit = 0;

static void
alarm_handler (int signal)
{
    gotit = 1;
}


int
main (int argc, char ** argv)
{
  clock_t start, stop;

  if (signal(SIGALRM, alarm_handler) == SIG_ERR)
    {
      perror ("signal");
      exit (1);
    }
  alarm(1);
  start = clock ();
  while (!gotit);
  stop = clock ();

  printf ("%jd clock ticks per second (start=%jd,stop=%jd)\n",
	  (intmax_t) (stop - start), (intmax_t) start, (intmax_t) stop);
  printf ("CLOCKS_PER_SEC=%jd, sysconf(_SC_CLK_TCK)=%ld\n",
	  (intmax_t) CLOCKS_PER_SEC, sysconf(_SC_CLK_TCK));
  return 0;
}
Commit	Line	Data
84724245	1	#include <signal.h>
28f540f4	2	#include <stdio.h>
3e1f480e	3	#include <stdlib.h>
28f540f4	4	#include <time.h>
84724245	5	#include <unistd.h>
28f540f4	6
84724245 RM	7	volatile int gotit = 0;
84724245 RM	8
de149cdb	9	static void
84724245 RM	10	alarm_handler (int signal)
	11	{
	12	gotit = 1;
	13	}
	14
	15
	16	int
	17	main (int argc, char ** argv)
28f540f4	18	{
84724245	19	clock_t start, stop;
28f540f4	20
227d9931	21	if (signal(SIGALRM, alarm_handler) == SIG_ERR)
9eb2730e UD	22	{
	23	perror ("signal");
	24	exit (1);
	25	}
84724245 RM	26	alarm(1);
	27	start = clock ();
	28	while (!gotit);
	29	stop = clock ();
28f540f4	30
fe342f50 L	31	printf ("%jd clock ticks per second (start=%jd,stop=%jd)\n",
fe342f50 L	32	(intmax_t) (stop - start), (intmax_t) start, (intmax_t) stop);
57ada0e7 L	33	printf ("CLOCKS_PER_SEC=%jd, sysconf(_SC_CLK_TCK)=%ld\n",
57ada0e7 L	34	(intmax_t) CLOCKS_PER_SEC, sysconf(_SC_CLK_TCK));
28f540f4 RM	35	return 0;
28f540f4 RM	36	}