Test Code

#include <stdio.h>
#include <sys/timeb.h>

int main() {
   struct timeb t_start, t_end, t_current;
   int t_diff = 0;
   int t_diff2 = 0;
   int loop_counter, incremental = 0;

   ftime(&t_start);
   printf("Start time: %d.%d\n",t_start.time, t_start.millitm);
   ftime(&t_current);
   t_diff= (1000* (t_current.time - t_start.time) + (t_current.millitm - t_start.millitm));
   t_diff2 = t_diff;
   while(t_diff < 1000) {
     ftime(&t_current);
     t_diff= (1000* (t_current.time - t_start.time) + (t_current.millitm - t_start.millitm));
     incremental++;
     if(t_diff2 < t_diff) {
       printf("Executed %d increments in %d milliseconds\n", incremental, t_diff-t_diff2);
       incremental = 0;
       t_diff2 = t_diff;
     }
   }
   ftime(&t_end);
   printf("End time: %d.%d\n",t_end.time, t_end.millitm);
}