src/java.base/windows/classes/sun/nio/ch/SinkChannelImpl.java
author alanb
Tue, 06 Feb 2018 16:04:46 +0000
changeset 48750 ffbb784a8873
parent 47216 71c04702a3d5
child 49493 814bd31f8da0
permissions -rw-r--r--
8196787: (ch) Moving network channels to use j.u.c locks Reviewed-by: prappo, rriggs
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/*
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 * Copyright (c) 2002, 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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/*
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 */
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package sun.nio.ch;
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import java.io.IOException;
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import java.io.FileDescriptor;
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import java.nio.ByteBuffer;
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import java.nio.channels.*;
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import java.nio.channels.spi.*;
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/**
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 * Pipe.SinkChannel implementation based on socket connection.
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 */
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class SinkChannelImpl
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    extends Pipe.SinkChannel
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    implements SelChImpl
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{
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    // The SocketChannel assoicated with this pipe
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    final SocketChannel sc;
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    public FileDescriptor getFD() {
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        return ((SocketChannelImpl)sc).getFD();
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    }
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    public int getFDVal() {
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        return ((SocketChannelImpl)sc).getFDVal();
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    }
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    SinkChannelImpl(SelectorProvider sp, SocketChannel sc) {
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        super(sp);
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        this.sc = sc;
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    }
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    protected void implCloseSelectableChannel() throws IOException {
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        if (!isRegistered())
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            kill();
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    }
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    public void kill() throws IOException {
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        sc.close();
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    }
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    protected void implConfigureBlocking(boolean block) throws IOException {
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        sc.configureBlocking(block);
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    }
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    public boolean translateReadyOps(int ops, int initialOps,
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                                     SelectionKeyImpl sk) {
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        int intOps = sk.nioInterestOps(); // Do this just once, it synchronizes
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        int oldOps = sk.nioReadyOps();
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        int newOps = initialOps;
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        if ((ops & Net.POLLNVAL) != 0)
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            throw new Error("POLLNVAL detected");
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        if ((ops & (Net.POLLERR | Net.POLLHUP)) != 0) {
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            newOps = intOps;
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            sk.nioReadyOps(newOps);
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            return (newOps & ~oldOps) != 0;
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        }
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        if (((ops & Net.POLLOUT) != 0) &&
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            ((intOps & SelectionKey.OP_WRITE) != 0))
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            newOps |= SelectionKey.OP_WRITE;
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        sk.nioReadyOps(newOps);
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        return (newOps & ~oldOps) != 0;
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    }
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    public boolean translateAndUpdateReadyOps(int ops, SelectionKeyImpl sk) {
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        return translateReadyOps(ops, sk.nioReadyOps(), sk);
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    }
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    public boolean translateAndSetReadyOps(int ops, SelectionKeyImpl sk) {
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        return translateReadyOps(ops, 0, sk);
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    }
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    public void translateAndSetInterestOps(int ops, SelectionKeyImpl sk) {
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        if ((ops & SelectionKey.OP_WRITE) != 0)
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            ops = Net.POLLOUT;
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        sk.selector.putEventOps(sk, ops);
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    }
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    public int write(ByteBuffer src) throws IOException {
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        try {
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            return sc.write(src);
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        } catch (AsynchronousCloseException x) {
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            close();
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            throw x;
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        }
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    }
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    public long write(ByteBuffer[] srcs) throws IOException {
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        try {
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            return sc.write(srcs);
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        } catch (AsynchronousCloseException x) {
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            close();
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            throw x;
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        }
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    }
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    public long write(ByteBuffer[] srcs, int offset, int length)
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        throws IOException
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    {
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        if ((offset < 0) || (length < 0) || (offset > srcs.length - length))
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           throw new IndexOutOfBoundsException();
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        try {
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            return write(Util.subsequence(srcs, offset, length));
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        } catch (AsynchronousCloseException x) {
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            close();
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            throw x;
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        }
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    }
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}