pid_out = ltt_event_get_long_unsigned(e,element);
element = ltt_field_member(f,1);
pid_in = ltt_event_get_long_unsigned(e,element);
pid_out = ltt_event_get_long_unsigned(e,element);
element = ltt_field_member(f,1);
pid_in = ltt_event_get_long_unsigned(e,element);