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8187443: Forest Consolidation: Move files to unified layout
Reviewed-by: darcy, ihse
This commit is contained in:
Erik Joelsson
parent
270fe13182
commit
3789983e89
56923 changed files with 3 additions and 15727 deletions
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@ -0,0 +1,363 @@
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/*
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* Copyright (c) 2008, 2013, 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 sun.nio.ch;
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import java.nio.channels.*;
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import java.util.concurrent.*;
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import java.io.IOException;
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import java.io.FileDescriptor;
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import java.net.InetSocketAddress;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.security.AccessControlContext;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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/**
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* Unix implementation of AsynchronousServerSocketChannel
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*/
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class UnixAsynchronousServerSocketChannelImpl
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extends AsynchronousServerSocketChannelImpl
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implements Port.PollableChannel
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{
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private static final NativeDispatcher nd = new SocketDispatcher();
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private final Port port;
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private final int fdVal;
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// flag to indicate an accept is outstanding
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private final AtomicBoolean accepting = new AtomicBoolean();
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private void enableAccept() {
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accepting.set(false);
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}
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// used to ensure that the context for an asynchronous accept is visible
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// the pooled thread that handles the I/O event
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private final Object updateLock = new Object();
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// pending accept
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private boolean acceptPending;
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private CompletionHandler<AsynchronousSocketChannel,Object> acceptHandler;
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private Object acceptAttachment;
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private PendingFuture<AsynchronousSocketChannel,Object> acceptFuture;
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// context for permission check when security manager set
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private AccessControlContext acceptAcc;
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UnixAsynchronousServerSocketChannelImpl(Port port)
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throws IOException
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{
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super(port);
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try {
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IOUtil.configureBlocking(fd, false);
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} catch (IOException x) {
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nd.close(fd); // prevent leak
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throw x;
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}
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this.port = port;
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this.fdVal = IOUtil.fdVal(fd);
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// add mapping from file descriptor to this channel
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port.register(fdVal, this);
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}
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@Override
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void implClose() throws IOException {
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// remove the mapping
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port.unregister(fdVal);
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// close file descriptor
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nd.close(fd);
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// if there is a pending accept then complete it
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CompletionHandler<AsynchronousSocketChannel,Object> handler;
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Object att;
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PendingFuture<AsynchronousSocketChannel,Object> future;
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synchronized (updateLock) {
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if (!acceptPending)
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return; // no pending accept
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acceptPending = false;
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handler = acceptHandler;
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att = acceptAttachment;
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future = acceptFuture;
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}
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// discard the stack trace as otherwise it may appear that implClose
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// has thrown the exception.
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AsynchronousCloseException x = new AsynchronousCloseException();
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x.setStackTrace(new StackTraceElement[0]);
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if (handler == null) {
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future.setFailure(x);
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} else {
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// invoke by submitting task rather than directly
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Invoker.invokeIndirectly(this, handler, att, null, x);
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}
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}
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@Override
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public AsynchronousChannelGroupImpl group() {
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return port;
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}
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/**
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* Invoked by event handling thread when listener socket is polled
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*/
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@Override
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public void onEvent(int events, boolean mayInvokeDirect) {
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synchronized (updateLock) {
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if (!acceptPending)
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return; // may have been grabbed by asynchronous close
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acceptPending = false;
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}
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// attempt to accept connection
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FileDescriptor newfd = new FileDescriptor();
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InetSocketAddress[] isaa = new InetSocketAddress[1];
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Throwable exc = null;
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try {
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begin();
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int n = accept(this.fd, newfd, isaa);
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// spurious wakeup, is this possible?
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if (n == IOStatus.UNAVAILABLE) {
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synchronized (updateLock) {
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acceptPending = true;
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}
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port.startPoll(fdVal, Net.POLLIN);
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return;
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}
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} catch (Throwable x) {
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if (x instanceof ClosedChannelException)
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x = new AsynchronousCloseException();
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exc = x;
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} finally {
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end();
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}
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// Connection accepted so finish it when not holding locks.
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AsynchronousSocketChannel child = null;
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if (exc == null) {
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try {
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child = finishAccept(newfd, isaa[0], acceptAcc);
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} catch (Throwable x) {
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if (!(x instanceof IOException) && !(x instanceof SecurityException))
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x = new IOException(x);
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exc = x;
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}
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}
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// copy field befores accept is re-renabled
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CompletionHandler<AsynchronousSocketChannel,Object> handler = acceptHandler;
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Object att = acceptAttachment;
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PendingFuture<AsynchronousSocketChannel,Object> future = acceptFuture;
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// re-enable accepting and invoke handler
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enableAccept();
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if (handler == null) {
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future.setResult(child, exc);
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// if an async cancel has already cancelled the operation then
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// close the new channel so as to free resources
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if (child != null && future.isCancelled()) {
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try {
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child.close();
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} catch (IOException ignore) { }
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}
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} else {
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Invoker.invoke(this, handler, att, child, exc);
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}
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}
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/**
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* Completes the accept by creating the AsynchronousSocketChannel for
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* the given file descriptor and remote address. If this method completes
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* with an IOException or SecurityException then the channel/file descriptor
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* will be closed.
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*/
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private AsynchronousSocketChannel finishAccept(FileDescriptor newfd,
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final InetSocketAddress remote,
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AccessControlContext acc)
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throws IOException, SecurityException
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{
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AsynchronousSocketChannel ch = null;
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try {
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ch = new UnixAsynchronousSocketChannelImpl(port, newfd, remote);
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} catch (IOException x) {
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nd.close(newfd);
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throw x;
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}
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// permission check must always be in initiator's context
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try {
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if (acc != null) {
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AccessController.doPrivileged(new PrivilegedAction<>() {
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public Void run() {
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SecurityManager sm = System.getSecurityManager();
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if (sm != null) {
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sm.checkAccept(remote.getAddress().getHostAddress(),
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remote.getPort());
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}
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return null;
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}
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}, acc);
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} else {
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SecurityManager sm = System.getSecurityManager();
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if (sm != null) {
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sm.checkAccept(remote.getAddress().getHostAddress(),
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remote.getPort());
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}
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}
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} catch (SecurityException x) {
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try {
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ch.close();
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} catch (Throwable suppressed) {
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x.addSuppressed(suppressed);
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}
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throw x;
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}
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return ch;
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}
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@Override
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Future<AsynchronousSocketChannel> implAccept(Object att,
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CompletionHandler<AsynchronousSocketChannel,Object> handler)
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{
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// complete immediately if channel is closed
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if (!isOpen()) {
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Throwable e = new ClosedChannelException();
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if (handler == null) {
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return CompletedFuture.withFailure(e);
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} else {
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Invoker.invoke(this, handler, att, null, e);
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return null;
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}
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}
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if (localAddress == null)
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throw new NotYetBoundException();
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// cancel was invoked with pending accept so connection may have been
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// dropped.
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if (isAcceptKilled())
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throw new RuntimeException("Accept not allowed due cancellation");
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// check and set flag to prevent concurrent accepting
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if (!accepting.compareAndSet(false, true))
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throw new AcceptPendingException();
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// attempt accept
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FileDescriptor newfd = new FileDescriptor();
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InetSocketAddress[] isaa = new InetSocketAddress[1];
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Throwable exc = null;
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try {
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begin();
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int n = accept(this.fd, newfd, isaa);
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if (n == IOStatus.UNAVAILABLE) {
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// need calling context when there is security manager as
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// permission check may be done in a different thread without
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// any application call frames on the stack
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PendingFuture<AsynchronousSocketChannel,Object> result = null;
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synchronized (updateLock) {
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if (handler == null) {
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this.acceptHandler = null;
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result = new PendingFuture<>(this);
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this.acceptFuture = result;
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} else {
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this.acceptHandler = handler;
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this.acceptAttachment = att;
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}
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this.acceptAcc = (System.getSecurityManager() == null) ?
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null : AccessController.getContext();
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this.acceptPending = true;
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}
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// register for connections
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port.startPoll(fdVal, Net.POLLIN);
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return result;
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}
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} catch (Throwable x) {
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// accept failed
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if (x instanceof ClosedChannelException)
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x = new AsynchronousCloseException();
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exc = x;
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} finally {
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end();
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}
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AsynchronousSocketChannel child = null;
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if (exc == null) {
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// connection accepted immediately
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try {
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child = finishAccept(newfd, isaa[0], null);
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} catch (Throwable x) {
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exc = x;
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}
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}
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// re-enable accepting before invoking handler
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enableAccept();
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if (handler == null) {
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return CompletedFuture.withResult(child, exc);
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} else {
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Invoker.invokeIndirectly(this, handler, att, child, exc);
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return null;
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}
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}
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/**
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* Accept a connection on a socket.
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*
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* @implNote Wrap native call to allow instrumentation.
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*/
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private int accept(FileDescriptor ssfd, FileDescriptor newfd,
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InetSocketAddress[] isaa)
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throws IOException
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{
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return accept0(ssfd, newfd, isaa);
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}
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// -- Native methods --
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private static native void initIDs();
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// Accepts a new connection, setting the given file descriptor to refer to
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// the new socket and setting isaa[0] to the socket's remote address.
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// Returns 1 on success, or IOStatus.UNAVAILABLE.
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//
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private native int accept0(FileDescriptor ssfd, FileDescriptor newfd,
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InetSocketAddress[] isaa)
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throws IOException;
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static {
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IOUtil.load();
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initIDs();
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}
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}
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