Timer test

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

int counter = 0;

void handler (int sig)
{
    counter++;
}

int main ()
{
    printf ("Start\n");
    struct sigaction sa;
    sa.sa_handler = handler;
    sa.sa_flags = 0;
    sigemptyset (&sa.sa_mask);
    sigaction (SIGPROF, &sa, NULL);

    struct itimerval val;
    struct itimerval val_old;
    val.it_interval.tv_sec  = 0;
    val.it_interval.tv_usec = 100;

    val.it_value.tv_sec  = 0;
    val.it_value.tv_usec = 100;

    struct timeval time;
    gettimeofday(&time, 0);
    time_t start = time.tv_sec;
    time_t cur = start;

    setitimer (2, &val, NULL);

    do
    {
        gettimeofday(&time, 0);
        cur = time.tv_sec;
    }
    while (cur < start+15);

    val.it_value.tv_sec  = 0;
    val.it_value.tv_usec = 0;
    setitimer (2, &val, &val_old);

    printf ("%i\n", counter);
    printf ("%li %li %li %li\n",
            val_old.it_interval.tv_sec,
            val_old.it_interval.tv_usec,
            val_old.it_value.tv_sec,
            val_old.it_value.tv_usec);

    return 0;
}