none/tests/freebsd/452275.c

   1 #include <fcntl.h>
   2 #include <signal.h>
   3 #include <stdio.h>
   4 #include <sys/time.h>
   5 #include <unistd.h>
   6
   7 volatile int ticks = 0;
   8 struct itimerval timert;
   9 struct sigaction timer_action;
  10
  11
  12 void handle_vtalrm(int sig) {
  13   ticks++;
  14 }
  15
  16 void setup_timer() {
  17   timer_action.sa_handler = handle_vtalrm;
  18   sigemptyset(&timer_action.sa_mask);
  19   timer_action.sa_flags = SA_RESTART;
  20
  21   sigaction(SIGVTALRM, &timer_action, NULL);
  22
  23   timert.it_interval.tv_sec = timert.it_value.tv_sec = 0;
  24   timert.it_interval.tv_usec = timert.it_value.tv_usec = 100;
  25   setitimer(ITIMER_VIRTUAL, &timert, NULL);
  26 }
  27
  28 int main(int argc, char *argv[]) {
  29   setup_timer();
  30   while (ticks < 100) {
  31     write(2, " ", 1);
  32   }
  33 }