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/*
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* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.internal.net.rdma;
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import java.io.FileDescriptor;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.nio.channels.FileChannel;
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import java.net.Socket;
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import java.net.SocketException;
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class RdmaSocketOutputStream extends FileOutputStream
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{
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static {
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init();
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}
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private RdmaSocketImpl impl = null;
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private byte temp[] = new byte[1];
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private Socket socket = null;
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RdmaSocketOutputStream(RdmaSocketImpl impl) throws IOException {
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super(impl.getFileDescriptor());
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this.impl = impl;
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socket = impl.getSocket();
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}
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public final FileChannel getChannel() {
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return null;
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}
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/**
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* Writes to the socket.
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* @param fd the FileDescriptor
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* @param b the data to be written
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* @param off the start offset in the data
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* @param len the number of bytes that are written
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* @exception IOException If an I/O error has occurred.
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*/
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private native void rdmaSocketWrite0(FileDescriptor fd, byte[] b,
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int off, int len) throws IOException;
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/**
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* Writes to the socket with appropriate locking of the
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* FileDescriptor.
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* @param b the data to be written
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* @param off the start offset in the data
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* @param len the number of bytes that are written
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* @exception IOException If an I/O error has occurred.
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*/
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private void rdmaSocketWrite(byte b[], int off, int len)
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throws IOException {
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if (len <= 0 || off < 0 || len > b.length - off) {
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if (len == 0) {
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return;
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}
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throw new ArrayIndexOutOfBoundsException("len == " + len
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+ " off == " + off + " buffer length == " + b.length);
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}
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FileDescriptor fd = impl.acquireFD();
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try {
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rdmaSocketWrite0(fd, b, off, len);
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} catch (SocketException se) {
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if (se instanceof sun.net.ConnectionResetException) {
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impl.setConnectionResetPending();
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se = new SocketException("Connection reset");
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}
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if (impl.isClosedOrPending()) {
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throw new SocketException("Socket closed");
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} else {
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throw se;
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}
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} finally {
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impl.releaseFD();
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}
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}
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/**
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* Writes a byte to the socket.
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* @param b the data to be written
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* @exception IOException If an I/O error has occurred.
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*/
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public void write(int b) throws IOException {
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temp[0] = (byte)b;
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rdmaSocketWrite(temp, 0, 1);
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}
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/**
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* Writes the contents of the buffer <i>b</i> to the socket.
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* @param b the data to be written
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* @exception SocketException If an I/O error has occurred.
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*/
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public void write(byte b[]) throws IOException {
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rdmaSocketWrite(b, 0, b.length);
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}
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/**
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* Writes <i>length</i> bytes from buffer <i>b</i> starting at
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* offset <i>len</i>.
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* @param b the data to be written
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* @param off the start offset in the data
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* @param len the number of bytes that are written
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* @exception SocketException If an I/O error has occurred.
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*/
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public void write(byte b[], int off, int len) throws IOException {
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rdmaSocketWrite(b, off, len);
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}
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/**
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* Closes the stream.
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*/
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private boolean closing = false;
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public void close() throws IOException {
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if (closing)
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return;
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closing = true;
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if (socket != null) {
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if (!socket.isClosed())
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socket.close();
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} else
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impl.close();
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closing = false;
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}
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/**
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* Perform class load-time initializations.
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*/
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private static native void init();
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}
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