question: public void lockAddress ( final int addr ) { if ( m_lockAddresses . putIfAbsent ( addr , System . currentTimeMillis ( ) ) != null ) { throw new IllegalStateException ( "address already locked, logical: " + addr + ", physical: " + physicalAddress ( addr , true ) ) ; } }
target:  lockAddress adds the address passed to a lock list.  This is for debug only and is not intended to be used generally for the live system.