int function ( ) { return locks . length ; }
gets concurrency level . concode_field_sep Lock[] locks concode_field_sep Lock getLock concode_elem_sep Lock getLock concode_elem_sep Lock getLock concode_elem_sep void unlock concode_elem_sep void unlock concode_elem_sep void unlock concode_elem_sep void lock concode_elem_sep void lock concode_elem_sep void lock