#include <assert.h>
#include <sys/time.h>
#include <signal.h>
#include <stdio.h>

long SmartScheduleInterval = 1; /* ms */
long SmartScheduleTime = 0;

static void
SmartScheduleTimer(int sig)
{
    if (sig != 0)
       SmartScheduleTime += SmartScheduleInterval;
}

void
SmartScheduleStartTimer(void)
{
    struct itimerval timer;
    timer.it_interval.tv_sec = 0;
    timer.it_interval.tv_usec = SmartScheduleInterval * 1000;
    timer.it_value.tv_sec = 0;
    timer.it_value.tv_usec = SmartScheduleInterval * 1000;
    setitimer(ITIMER_REAL, &timer, 0);
}

int main()
{
    /* Set up the timer signal function */
    struct sigaction act;
    act.sa_handler = SmartScheduleTimer;
    sigemptyset(&act.sa_mask);
    sigaddset(&act.sa_mask, SIGALRM);
    if (sigaction(SIGALRM, &act, 0) < 0) {
        perror("sigaction failed");
	return -1;
    }

   /* start timer */
   SmartScheduleStartTimer();

   /* Loop forever, doing tests which should always succeed, with lots of signals */
   int x = 0;
   int i = 0;
   while (1) {
     x = i;
     int j = x;
     if (j != i)
       {
          printf("failed: %d isn't equal to %d, apparently\n", i, j);
          break;
       }
     i++;
  }
  return 0;
}