demos/itimer.res

   1  int do_setitimer(int which, struct itimerval *value,
   2                  struct itimerval *ovalue)
   3 {
   4    unsigned long expire;
   5    cputime_t cputime;
   6    int k;
   7    if (ovalue && (k = do_getitimer(which, ovalue)) < 0)
   8      return k;
   9    switch (which) {
  10      case ITIMER_VIRTUAL:
  11        cputime = timeval_to_cputime(&value->it_value);
  12       if (cputime_gt(cputime, cputime_zero))
  13          cputime = cputime_add(cputime,
  14                                        jiffies_to_cputime(1));
  15        current->it_virt_value = cputime;
  16        cputime = timeval_to_cputime(&value->it_interval);
  17        current->it_virt_incr = cputime;
  18        break;
  19      case ITIMER_PROF:
  20        cputime = timeval_to_cputime(&value->it_value);
  21         if (cputime_gt(cputime, cputime_zero))
  22           cputime = cputime_add(cputime,
  23                                         jiffies_to_cputime(1));
  24          current->it_prof_value = cputime;
  25          cputime = timeval_to_cputime(&value->it_interval);
  26          current->it_prof_incr = cputime;
  27          break;
  28        default:
  29          return -EINVAL;
  30    }
  31    return 0;
  32 }