37 lines
625 B
C
37 lines
625 B
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 ("%ld clock ticks per second (start=%ld,stop=%ld)\n",
|
|
stop - start, start, stop);
|
|
printf ("CLOCKS_PER_SEC=%ld, sysconf(_SC_CLK_TCK)=%ld\n",
|
|
CLOCKS_PER_SEC, sysconf(_SC_CLK_TCK));
|
|
return 0;
|
|
}
|