* @see java.lang.AutoCloseable#close()
     */
    @Override
    void close () throws CIFSException;


    /**
     * @return whether the FD is open and valid
     */
    boolean isOpen ();


    /**
     * @return whether the FD was previously open but became invalid
     */
    boolean isStale ();


    /**
     * @param type
     * @return unwrapped instance
     */

        boolean wasOpen = isOpen();
        this.open = false;
        if ( this.input != null ) {
            this.input.close();
            this.input = null;
        }

        if ( this.output != null ) {
            this.output.close();
            this.output = null;
        }

        try {
            if ( wasOpen ) {
                this.handle.close();

    public void write( byte[] b ) throws IOException {
        write( b, 0, b.length );
    }

    public boolean isOpen()
    {
        return file.isOpen();
    }
    void ensureOpen() throws IOException {
        // ensure file is open
        if( file.isOpen() == false ) {
            file.open( openFlags, access | SmbConstants.FILE_WRITE_DATA, SmbFile.ATTR_NORMAL, 0 );
            if( append ) {

                    int off,
                    int length,
                    boolean isDirect) throws IOException {
        if (out != null && out.isOpen() == false)
            throw new IOException("DCERPC pipe is no longer open");

        if (in == null)
            in = (SmbFileInputStream)pipe.getNamedPipeInputStream();
        if (out == null)

        this.handle = handle;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.SmbFileOutputStream#isOpen()
     */
    @Override
    public boolean isOpen () {
        return this.handle.isOpen();
    }


    @Override
    protected synchronized SmbTreeHandleImpl ensureTreeConnected () throws CIFSException {
        return this.handle.ensureTreeConnected();

    }


    /**
     * @return whether the stream is open
     */
    public boolean isOpen () {
        return this.handle != null && this.handle.isValid();
    }


    protected synchronized SmbFileHandleImpl ensureOpen () throws CIFSException {
        if ( !isOpen() ) {
            // one extra acquire to keep this open till the stream is released

    public int read( byte b[], int off, int len ) throws SmbException {
        if( len <= 0 ) {
            return 0;
        }
        long start = fp;

        // ensure file is open
        if( file.isOpen() == false ) {
            file.open( openFlags, 0, SmbFile.ATTR_NORMAL, options );
        }

        int r, n;
        SmbComReadAndXResponse response = new SmbComReadAndXResponse( b, off );
        do {

     */
    int connectionState;
    int tid;

    String share;
    String service = "?????";
    String service0;
    SmbSession session;
    boolean inDfs, inDomainDfs;
    int tree_num; // used by SmbFile.isOpen

    SmbTree( SmbSession session, String share, String service ) {
        this.session = session;
        this.share = share.toUpperCase();
        if( service != null && service.startsWith( "??" ) == false ) {

    private volatile int tid = -1;
    private volatile String service = "?????";
    private volatile boolean inDfs, inDomainDfs;
    private volatile long treeNum; // used by SmbFile.isOpen

    private final AtomicLong usageCount = new AtomicLong(0);
    private final AtomicBoolean sessionAcquired = new AtomicBoolean(true);

    private final boolean traceResource;

        }

        return f;
    }
    void open( int flags, int access, int attrs, int options ) throws SmbException {
        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;