1 /*

     2  * Copyright (c) 2018, 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 package jdk.internal.net.rdma;

    27 

    28 import java.io.IOException;

    29 import java.net.ProtocolFamily;

    30 import java.nio.channels.DatagramChannel;

    31 import java.nio.channels.Pipe;

    32 import java.nio.channels.ServerSocketChannel;

    33 import java.nio.channels.SocketChannel;

    34 import java.nio.channels.spi.AbstractSelector;

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

    36 import sun.nio.ch.SelectorProviderImpl;

    37 import java.security.AccessController;

    38 import java.security.PrivilegedAction;

    39 

    40 public class RdmaPollSelectorProvider

    41     extends SelectorProvider

    42 {

    43     private static final Object lock = new Object();

    44     private static SelectorProvider provider = null;

    45 

    46     public static SelectorProvider provider() {

    47         synchronized (lock) {

    48             if (provider != null)

    49                 return provider;

    50             return AccessController.doPrivileged(

    51                 new PrivilegedAction<>() {

    52                     public SelectorProvider run() {

    53                             provider = new RdmaPollSelectorProvider();

    54                             return provider;

    55                         }

    56                     });

    57         }

    58     }

    59 

    60     public AbstractSelector openSelector() throws IOException {

    61         return new RdmaPollSelectorImpl(this);

    62     }

    63 

    64     public SocketChannel openSocketChannel()

    65             throws IOException {

    66         throw new UnsupportedOperationException();

    67     }

    68 

    69     public SocketChannel openSocketChannel(ProtocolFamily family)

    70             throws IOException {

    71         return new RdmaSocketChannelImpl(this, family);

    72     }

    73 

    74     public ServerSocketChannel openServerSocketChannel()

    75             throws IOException {

    76         throw new UnsupportedOperationException();

    77     }

    78 

    79     public ServerSocketChannel openServerSocketChannel(ProtocolFamily family)

    80             throws IOException {

    81         return new RdmaServerSocketChannelImpl(this, family);

    82     }

    83 

    84     public DatagramChannel openDatagramChannel()

    85             throws IOException {

    86         throw new UnsupportedOperationException();

    87     }

    88 

    89     public DatagramChannel openDatagramChannel(ProtocolFamily family)

    90             throws IOException {

    91         throw new UnsupportedOperationException();

    92     }

    93 

    94     public Pipe openPipe() throws IOException {

    95         throw new UnsupportedOperationException();

    96     }

    97 }