sub event_handler {
   my $thread_sub = sub { my $event = SOD::EventCooker->new(shift);
                          if (exists $p_ids{$res->{$_}->{'ev_p_id'}}) {
                             # do something
                          }
                          else {
                             my $dbh = DBI->connect_cached("DBI:mysql:database=$appdata{DBBASE}", $appdata{DBUSER}, $appdata{DBPASS},
  { RaiseError => 1, AutoCommit => 1 }) || die $dbh->errstr;
                             $event->evaluate($dbh);
                          }
                        };
   my @threads;
   my $dbh = DBI->connect("DBI:mysql:database=$appdata{DBBASE}", $appdata{DBUSER}, $appdata{DBPASS},
                          { RaiseError => 1, AutoCommit => 1 }) || die $dbh->errstr;
   
   while (1) {
      sleep 1;
      last if $tflag; # $tflag is a shared global.
      my $thread_time : shared = time;
      my $res = $dbh->selectall_hashref("SELECT * FROM event WHERE ev_time<=$thread_time", 'ev_time');
      $dbh->do("DELETE FROM event WHERE ev_time<=$thread_time"); 

      map {
         push @threads, threads->new(\$thread_sub->($res->{$_}));
      } sort keys(%$res);
      
      map {
         $_->join;
      } @threads;
      @threads = ();
   }   
}