return this.session.acquire();
    }


    /**
     * @return the tid
     */
    public int getTid () {
        return this.tid;
    }


    /**
     * @return the tree_num (monotonically increasing counter to track reconnects)
     */
    public long getTreeNum () {
        return this.treeNum;
    }


    /**
     * {@inheritDoc}
     *

        if( isOpen() ) {
            return;
        }
        fid = open0( flags, access, attrs, options );
        opened = true;
        tree_num = tree.tree_num;
    }
    boolean isOpen() {
        boolean ans = opened && isConnected() && tree_num == tree.tree_num;
        return ans;
    }
    void close( int f, long lastWriteTime ) throws SmbException {

        if( log.level >= 3 )