code: public void unlock()
    {
        if (tc.isEntryEnabled()) Tr.entry(tc, "unlock");
  
        if (_handle2 != null)
        {
          releaseLock(_handle2);
        }
        if (_handle1 != null)
        {
          releaseLock(_handle1);
        }
  
        _handle2=null;
        _handle1=null;
  
        if (tc.isEntryEnabled()) Tr.exit(tc, "unlock");
    }
docs: Releases the exclusive lock.