57115
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/*
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* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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57115
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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.IOException;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.ProtocolFamily;
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import java.net.ServerSocket;
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import java.net.SocketAddress;
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import java.net.SocketOption;
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import java.net.StandardSocketOptions;
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import java.net.StandardProtocolFamily;
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import java.nio.channels.AlreadyBoundException;
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import java.nio.channels.AsynchronousCloseException;
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import java.nio.channels.ClosedChannelException;
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import java.nio.channels.NotYetBoundException;
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import java.nio.channels.SelectionKey;
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import java.nio.channels.ServerSocketChannel;
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import java.nio.channels.SocketChannel;
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import java.nio.channels.UnsupportedAddressTypeException;
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import java.nio.channels.spi.SelectorProvider;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.Objects;
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import java.util.Set;
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import java.util.concurrent.locks.ReentrantLock;
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import sun.nio.ch.IOStatus;
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import sun.nio.ch.IOUtil;
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import sun.nio.ch.NativeThread;
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import sun.nio.ch.Net;
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import sun.nio.ch.SelChImpl;
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import sun.nio.ch.SelectionKeyImpl;
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import sun.net.ext.RdmaSocketOptions;
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import static java.net.StandardProtocolFamily.INET;
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import static java.net.StandardProtocolFamily.INET6;
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public class RdmaServerSocketChannelImpl
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extends ServerSocketChannel
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implements SelChImpl
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{
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//The protocol family of the socket
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private final ProtocolFamily family;
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private static RdmaSocketDispatcher nd;
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private final FileDescriptor fd;
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private final int fdVal;
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private final ReentrantLock acceptLock = new ReentrantLock();
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private final Object stateLock = new Object();
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private static final int ST_INUSE = 0;
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private static final int ST_CLOSING = 1;
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private static final int ST_KILLPENDING = 2;
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private static final int ST_KILLED = 3;
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private int state;
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private long thread;
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private InetSocketAddress localAddress;
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private boolean isReuseAddress;
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private ServerSocket socket;
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private static final UnsupportedOperationException unsupported;
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private static final SelectorProvider checkSupported(SelectorProvider sp) {
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if (unsupported != null)
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throw new UnsupportedOperationException(unsupported.getMessage(), unsupported);
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else
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return sp;
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}
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RdmaServerSocketChannelImpl(SelectorProvider sp, ProtocolFamily family)
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throws IOException {
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super(checkSupported(sp));
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Objects.requireNonNull(family, "'family' is null");
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if (!(family == INET || family == INET6)) {
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throw new UnsupportedOperationException(
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"Protocol family not supported");
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}
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if (family == INET6) {
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if (!Net.isIPv6Available()) {
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throw new UnsupportedOperationException(
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"IPv6 not available");
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}
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}
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this.family = family;
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this.fd = RdmaNet.serverSocket(family, true);
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this.fdVal = IOUtil.fdVal(fd);
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}
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private void ensureOpen() throws ClosedChannelException {
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if (!isOpen())
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throw new ClosedChannelException();
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}
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@Override
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public ServerSocket socket() {
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synchronized (stateLock) {
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if (socket == null)
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socket = RdmaServerSocketAdaptor.create(this);
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return socket;
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}
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}
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@Override
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public SocketAddress getLocalAddress() throws IOException {
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synchronized (stateLock) {
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ensureOpen();
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return (localAddress == null)
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? null
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: Net.getRevealedLocalAddress(localAddress);
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}
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}
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@Override
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public <T> ServerSocketChannel setOption(SocketOption<T> name, T value)
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throws IOException
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{
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Objects.requireNonNull(name);
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if (!supportedOptions().contains(name))
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throw new UnsupportedOperationException("'" + name
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+ "' not supported");
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synchronized (stateLock) {
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ensureOpen();
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if (isBound() && (name == StandardSocketOptions.SO_REUSEADDR))
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throw new UnsupportedOperationException(
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"RDMA server socket channel cannot set the socket option "
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+ name.toString() + " after bind.");
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RdmaNet.setSocketOption(fd, RdmaNet.UNSPEC, name, value);
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return this;
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}
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}
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@Override
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@SuppressWarnings("unchecked")
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public <T> T getOption(SocketOption<T> name)
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throws IOException
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{
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Objects.requireNonNull(name);
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if (!supportedOptions().contains(name))
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throw new UnsupportedOperationException("'" + name
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+ "' not supported");
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synchronized (stateLock) {
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ensureOpen();
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return (T) RdmaNet.getSocketOption(fd, RdmaNet.UNSPEC, name);
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}
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}
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private static class DefaultOptionsHolder {
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static final Set<SocketOption<?>> defaultOptions = defaultOptions();
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private static Set<SocketOption<?>> defaultOptions() {
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HashSet<SocketOption<?>> set = new HashSet<>(2);
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set.add(StandardSocketOptions.SO_RCVBUF);
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set.add(StandardSocketOptions.SO_REUSEADDR);
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if (RdmaNet.isRdmaAvailable()) {
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RdmaSocketOptions rdmaOptions =
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RdmaSocketOptions.getInstance();
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set.addAll(rdmaOptions.options());
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}
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return Collections.unmodifiableSet(set);
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}
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}
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public final Set<SocketOption<?>> supportedOptions() {
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return DefaultOptionsHolder.defaultOptions;
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}
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private final InetSocketAddress anyLocalAddress() throws IOException {
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if (family == INET)
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return new InetSocketAddress(InetAddress.getByName("0.0.0.0"), 0);
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else if (family == INET6)
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return new InetSocketAddress(InetAddress.getByName("::"), 0);
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else
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throw new UnsupportedAddressTypeException();
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}
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@Override
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public ServerSocketChannel bind(SocketAddress local, int backlog)
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throws IOException {
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synchronized (stateLock) {
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ensureOpen();
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if (localAddress != null)
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throw new AlreadyBoundException();
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InetSocketAddress isa = (local == null)
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? anyLocalAddress()
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: RdmaNet.checkAddress(local, family);
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SecurityManager sm = System.getSecurityManager();
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if (sm != null)
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sm.checkListen(isa.getPort());
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RdmaNet.bind(family, fd, isa.getAddress(), isa.getPort());
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RdmaNet.listen(fd, backlog < 1 ? 50 : backlog);
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localAddress = RdmaNet.localAddress(fd);
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}
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return this;
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}
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private void begin(boolean blocking) throws ClosedChannelException {
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if (blocking)
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begin();
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synchronized (stateLock) {
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ensureOpen();
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if (localAddress == null)
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throw new NotYetBoundException();
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if (blocking)
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thread = NativeThread.current();
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}
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}
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private void end(boolean blocking, boolean completed)
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throws AsynchronousCloseException {
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if (blocking) {
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synchronized (stateLock) {
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thread = 0;
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if (state == ST_CLOSING) {
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stateLock.notifyAll();
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}
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}
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end(completed);
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}
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}
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@Override
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public SocketChannel accept() throws IOException {
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acceptLock.lock();
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try {
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int n = 0;
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FileDescriptor newfd = new FileDescriptor();
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InetSocketAddress[] isaa = new InetSocketAddress[1];
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boolean blocking = isBlocking();
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try {
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begin(blocking);
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do {
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if (blocking) {
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do {
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n = checkAccept(this.fd);
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} while ((n == 0 || n == IOStatus.INTERRUPTED)
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&& isOpen());
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}
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n = accept(this.fd, newfd, isaa);
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} while (n == IOStatus.INTERRUPTED && isOpen());
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} finally {
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end(blocking, n > 0);
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assert IOStatus.check(n);
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}
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if (n < 1)
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return null;
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// newly accepted socket is initially in blocking mode
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RdmaNet.configureBlocking(newfd, true);
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InetSocketAddress isa = isaa[0];
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SocketChannel sc = new RdmaSocketChannelImpl(provider(),
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newfd, isa);
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// check permitted to accept connections from the remote address
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SecurityManager sm = System.getSecurityManager();
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if (sm != null) {
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try {
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sm.checkAccept(isa.getAddress().getHostAddress(),
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isa.getPort());
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} catch (SecurityException x) {
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sc.close();
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throw x;
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}
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}
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return sc;
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} finally {
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acceptLock.unlock();
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}
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}
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@Override
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protected void implConfigureBlocking(boolean block) throws IOException {
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acceptLock.lock();
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try {
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synchronized (stateLock) {
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ensureOpen();
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RdmaNet.configureBlocking(fd, block);
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}
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} finally {
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acceptLock.unlock();
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}
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}
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@Override
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protected void implCloseSelectableChannel() throws IOException {
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assert !isOpen();
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boolean interrupted = false;
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boolean blocking;
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// set state to ST_CLOSING
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synchronized (stateLock) {
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assert state < ST_CLOSING;
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state = ST_CLOSING;
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blocking = isBlocking();
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}
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// wait for any outstanding accept to complete
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if (blocking) {
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synchronized (stateLock) {
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assert state == ST_CLOSING;
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long th = thread;
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if (th != 0) {
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nd.preClose(fd);
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NativeThread.signal(th);
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// wait for accept operation to end
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while (thread != 0) {
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try {
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stateLock.wait();
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} catch (InterruptedException e) {
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interrupted = true;
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}
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}
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}
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}
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} else {
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// non-blocking mode: wait for accept to complete
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acceptLock.lock();
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acceptLock.unlock();
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}
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// set state to ST_KILLPENDING
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synchronized (stateLock) {
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assert state == ST_CLOSING;
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state = ST_KILLPENDING;
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}
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// close socket if not registered with Selector
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if (!isRegistered())
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kill();
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// restore interrupt status
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if (interrupted)
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Thread.currentThread().interrupt();
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}
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@Override
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public void kill() throws IOException {
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synchronized (stateLock) {
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if (state == ST_KILLPENDING) {
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state = ST_KILLED;
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nd.close(fd);
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}
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}
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}
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boolean isBound() {
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synchronized (stateLock) {
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return localAddress != null;
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}
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}
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InetSocketAddress localAddress() {
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synchronized (stateLock) {
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return localAddress;
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}
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}
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/**
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* Poll this channel's socket for a new connection up to the given timeout.
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398 |
* @return {@code true} if there is a connection to accept
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399 |
*/
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400 |
boolean pollAccept(long timeout) throws IOException {
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401 |
assert Thread.holdsLock(blockingLock()) && isBlocking();
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acceptLock.lock();
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403 |
try {
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boolean polled = false;
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405 |
try {
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406 |
begin(true);
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407 |
int events = RdmaNet.poll(fd, Net.POLLIN, timeout);
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408 |
polled = (events != 0);
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409 |
} finally {
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410 |
end(true, polled);
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411 |
}
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412 |
return polled;
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413 |
} finally {
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414 |
acceptLock.unlock();
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415 |
}
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416 |
}
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417 |
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418 |
public boolean translateReadyOps(int ops, int initialOps,
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419 |
SelectionKeyImpl ski) {
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420 |
int intOps = ski.nioInterestOps();
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421 |
int oldOps = ski.nioReadyOps();
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422 |
int newOps = initialOps;
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423 |
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424 |
if ((ops & Net.POLLNVAL) != 0) {
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return false;
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426 |
}
|
|
427 |
|
|
428 |
if ((ops & (Net.POLLERR | Net.POLLHUP)) != 0) {
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|
429 |
newOps = intOps;
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|
430 |
ski.nioReadyOps(newOps);
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431 |
return (newOps & ~oldOps) != 0;
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432 |
}
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|
433 |
|
|
434 |
if (((ops & Net.POLLIN) != 0) &&
|
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435 |
((intOps & SelectionKey.OP_ACCEPT) != 0))
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|
436 |
newOps |= SelectionKey.OP_ACCEPT;
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|
437 |
|
|
438 |
ski.nioReadyOps(newOps);
|
|
439 |
return (newOps & ~oldOps) != 0;
|
|
440 |
}
|
|
441 |
|
|
442 |
public boolean translateAndUpdateReadyOps(int ops, SelectionKeyImpl ski) {
|
|
443 |
return translateReadyOps(ops, ski.nioReadyOps(), ski);
|
|
444 |
}
|
|
445 |
|
|
446 |
public boolean translateAndSetReadyOps(int ops, SelectionKeyImpl ski) {
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|
447 |
return translateReadyOps(ops, 0, ski);
|
|
448 |
}
|
|
449 |
|
|
450 |
public int translateInterestOps(int ops) {
|
|
451 |
int newOps = 0;
|
|
452 |
if ((ops & SelectionKey.OP_ACCEPT) != 0)
|
|
453 |
newOps |= Net.POLLIN;
|
|
454 |
return newOps;
|
|
455 |
}
|
|
456 |
|
|
457 |
public FileDescriptor getFD() {
|
|
458 |
return fd;
|
|
459 |
}
|
|
460 |
|
|
461 |
public int getFDVal() {
|
|
462 |
return fdVal;
|
|
463 |
}
|
|
464 |
|
|
465 |
public String toString() {
|
|
466 |
StringBuilder sb = new StringBuilder();
|
|
467 |
sb.append(this.getClass().getName());
|
|
468 |
sb.append('[');
|
|
469 |
if (!isOpen()) {
|
|
470 |
sb.append("closed");
|
|
471 |
} else {
|
|
472 |
synchronized (stateLock) {
|
|
473 |
InetSocketAddress addr = localAddress;
|
|
474 |
if (addr == null) {
|
|
475 |
sb.append("unbound");
|
|
476 |
} else {
|
|
477 |
sb.append(Net.getRevealedLocalAddressAsString(addr));
|
|
478 |
}
|
|
479 |
}
|
|
480 |
}
|
|
481 |
sb.append(']');
|
|
482 |
return sb.toString();
|
|
483 |
}
|
|
484 |
|
|
485 |
private int accept(FileDescriptor ssfd, FileDescriptor newfd,
|
|
486 |
InetSocketAddress[] isaa) throws IOException {
|
|
487 |
return accept0(ssfd, newfd, isaa);
|
|
488 |
}
|
|
489 |
|
|
490 |
// -- Native methods --
|
|
491 |
private static native int checkAccept(FileDescriptor fd)
|
|
492 |
throws IOException;
|
|
493 |
|
|
494 |
private native int accept0(FileDescriptor ssfd, FileDescriptor newfd,
|
|
495 |
InetSocketAddress[] isaa) throws IOException;
|
|
496 |
|
|
497 |
private static native void initIDs()throws UnsupportedOperationException;
|
|
498 |
|
|
499 |
static {
|
|
500 |
IOUtil.load();
|
|
501 |
System.loadLibrary("extnet");
|
|
502 |
UnsupportedOperationException uoe = null;
|
|
503 |
try {
|
|
504 |
initIDs();
|
|
505 |
} catch (UnsupportedOperationException e) {
|
|
506 |
uoe = e;
|
|
507 |
}
|
|
508 |
unsupported = uoe;
|
|
509 |
nd = new RdmaSocketDispatcher();
|
|
510 |
}
|
|
511 |
}
|