code pickup_lfork(PhilsPtr self,
  TaskPtr current_task)
{
    if (self->left_fork->owner == NULL) {
        self->left_fork->owner = self;
        self->next = pickup_rfork;
        goto scheduler(self, current_task);
    } else {
        self->next = hungry1;
        goto scheduler(self, current_task);
}