Query to find locked objects in Oracle

SELECT c.owner
, c.object_name
, c.object_type
, b.SID
, b.serial#
, b.status
, b.osuser
, b.machine
, b.program
, b.module
, b.action
FROM v$locked_object a
, v$session b
, dba_objects c
WHERE b.SID = a.session_id
AND a.object_id = c.object_id
ORDER BY module;