1 /*

     2  * Copyright (c) 2002, 2006, Oracle and/or its affiliates. All rights reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.  Oracle designates this

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

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

    10  *

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

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

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

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

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

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

    23  * questions.

    24  */

    25 

    26 /*

    27  */

    28 

    29 package sun.nio.ch;

    30 

    31 import java.io.IOException;

    32 import java.io.FileDescriptor;

    33 import java.nio.ByteBuffer;

    34 import java.nio.channels.*;

    35 import java.nio.channels.spi.*;

    36 

    37 

    38 /**

    39  * Pipe.SinkChannel implementation based on socket connection.

    40  */

    41 

    42 class SinkChannelImpl

    43     extends Pipe.SinkChannel

    44     implements SelChImpl

    45 {

    46     // The SocketChannel assoicated with this pipe

    47     SocketChannel sc;

    48 

    49     public FileDescriptor getFD() {

    50         return ((SocketChannelImpl)sc).getFD();

    51     }

    52 

    53     public int getFDVal() {

    54         return ((SocketChannelImpl)sc).getFDVal();

    55     }

    56 

    57     SinkChannelImpl(SelectorProvider sp, SocketChannel sc) {

    58         super(sp);

    59         this.sc = sc;

    60     }

    61 

    62     protected void implCloseSelectableChannel() throws IOException {

    63         if (!isRegistered())

    64             kill();

    65     }

    66 

    67     public void kill() throws IOException {

    68         sc.close();

    69     }

    70 

    71     protected void implConfigureBlocking(boolean block) throws IOException {

    72         sc.configureBlocking(block);

    73     }

    74 

    75     public boolean translateReadyOps(int ops, int initialOps,

    76                                      SelectionKeyImpl sk) {

    77         int intOps = sk.nioInterestOps(); // Do this just once, it synchronizes

    78         int oldOps = sk.nioReadyOps();

    79         int newOps = initialOps;

    80 

    81         if ((ops & Net.POLLNVAL) != 0)

    82             throw new Error("POLLNVAL detected");

    83 

    84         if ((ops & (Net.POLLERR | Net.POLLHUP)) != 0) {

    85             newOps = intOps;

    86             sk.nioReadyOps(newOps);

    87             return (newOps & ~oldOps) != 0;

    88         }

    89 

    90         if (((ops & Net.POLLOUT) != 0) &&

    91             ((intOps & SelectionKey.OP_WRITE) != 0))

    92             newOps |= SelectionKey.OP_WRITE;

    93 

    94         sk.nioReadyOps(newOps);

    95         return (newOps & ~oldOps) != 0;

    96     }

    97 

    98     public boolean translateAndUpdateReadyOps(int ops, SelectionKeyImpl sk) {

    99         return translateReadyOps(ops, sk.nioReadyOps(), sk);

   100     }

   101 

   102     public boolean translateAndSetReadyOps(int ops, SelectionKeyImpl sk) {

   103         return translateReadyOps(ops, 0, sk);

   104     }

   105 

   106     public void translateAndSetInterestOps(int ops, SelectionKeyImpl sk) {

   107         if ((ops & SelectionKey.OP_WRITE) != 0)

   108             ops = Net.POLLOUT;

   109         sk.selector.putEventOps(sk, ops);

   110     }

   111 

   112     public int write(ByteBuffer src) throws IOException {

   113         try {

   114             return sc.write(src);

   115         } catch (AsynchronousCloseException x) {

   116             close();

   117             throw x;

   118         }

   119     }

   120 

   121     public long write(ByteBuffer[] srcs) throws IOException {

   122         try {

   123             return sc.write(srcs);

   124         } catch (AsynchronousCloseException x) {

   125             close();

   126             throw x;

   127         }

   128     }

   129 

   130     public long write(ByteBuffer[] srcs, int offset, int length)

   131         throws IOException

   132     {

   133         if ((offset < 0) || (length < 0) || (offset > srcs.length - length))

   134            throw new IndexOutOfBoundsException();

   135         try {

   136             return write(Util.subsequence(srcs, offset, length));

   137         } catch (AsynchronousCloseException x) {

   138             close();

   139             throw x;

   140         }

   141     }

   142 }