/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.internal.net.rdma;

import java.io.FileDescriptor;

import java.io.FileOutputStream;

import java.io.IOException;

import java.nio.channels.FileChannel;

import java.net.Socket;

import java.net.SocketException;

class RdmaSocketOutputStream extends FileOutputStream

{

    static {

        init();

    }

    private RdmaSocketImpl impl = null;

    private byte temp[] = new byte[1];

    private Socket socket = null;

    RdmaSocketOutputStream(RdmaSocketImpl impl) throws IOException {

        super(impl.getFileDescriptor());

        this.impl = impl;

        socket = impl.getSocket();

    }

    public final FileChannel getChannel() {

        return null;

    }

    /**

     * Writes to the socket.

     * @param fd the FileDescriptor

     * @param b the data to be written

     * @param off the start offset in the data

     * @param len the number of bytes that are written

     * @exception IOException If an I/O error has occurred.

     */

    private native void rdmaSocketWrite0(FileDescriptor fd, byte[] b,

            int off, int len) throws IOException;

    /**

     * Writes to the socket with appropriate locking of the

     * FileDescriptor.

     * @param b the data to be written

     * @param off the start offset in the data

     * @param len the number of bytes that are written

     * @exception IOException If an I/O error has occurred.

     */

    private void rdmaSocketWrite(byte b[], int off, int len)

            throws IOException {

        if (len <= 0 || off < 0 || len > b.length - off) {

            if (len == 0) {

                return;

            }

            throw new ArrayIndexOutOfBoundsException("len == " + len

                    + " off == " + off + " buffer length == " + b.length);

        }

        FileDescriptor fd = impl.acquireFD();

        try {

            rdmaSocketWrite0(fd, b, off, len);

        } catch (SocketException se) {

            if (se instanceof sun.net.ConnectionResetException) {

                impl.setConnectionResetPending();

                se = new SocketException("Connection reset");

            }

            if (impl.isClosedOrPending()) {

                throw new SocketException("Socket closed");

            } else {

                throw se;

            }

        } finally {

            impl.releaseFD();

        }

    }

    /**

     * Writes a byte to the socket.

     * @param b the data to be written

     * @exception IOException If an I/O error has occurred.

     */

    public void write(int b) throws IOException {

        temp[0] = (byte)b;

        rdmaSocketWrite(temp, 0, 1);

    }

    /**

     * Writes the contents of the buffer <i>b</i> to the socket.

     * @param b the data to be written

     * @exception SocketException If an I/O error has occurred.

     */

    public void write(byte b[]) throws IOException {

        rdmaSocketWrite(b, 0, b.length);

    }

    /**

     * Writes <i>length</i> bytes from buffer <i>b</i> starting at

     * offset <i>len</i>.

     * @param b the data to be written

     * @param off the start offset in the data

     * @param len the number of bytes that are written

     * @exception SocketException If an I/O error has occurred.

     */

    public void write(byte b[], int off, int len) throws IOException {

        rdmaSocketWrite(b, off, len);

    }

    /**

     * Closes the stream.

     */

    private boolean closing = false;

    public void close() throws IOException {

        if (closing)

            return;

        closing = true;

        if (socket != null) {

            if (!socket.isClosed())

                socket.close();

        } else

            impl.close();

        closing = false;

    }

    /**

     * Perform class load-time initializations.

     */

    private static native void init();

}