1 /*
   2  * Copyright (c) 2001, 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 rdma.ch;
  27 
  28 import java.io.IOException;
  29 import java.nio.channels.*;
  30 import java.nio.channels.spi.*;
  31 import sun.nio.ch.SelectorProviderImpl;
  32 import java.security.AccessController;
  33 import java.security.PrivilegedAction;
  34 
  35 public class RdmaPollSelectorProvider
  36     extends SelectorProviderImpl
  37 {
  38     private static final Object lock = new Object();
  39     private static SelectorProvider provider = null;
  40 
  41     public static SelectorProvider provider() {
  42         synchronized (lock) {
  43             if (provider != null)
  44                 return provider;
  45             return AccessController.doPrivileged(
  46                 new PrivilegedAction<>() {
  47                     public SelectorProvider run() {
  48                             provider = new RdmaPollSelectorProvider();
  49                             return provider;
  50                         }
  51                     });
  52         }
  53     }
  54 
  55     public AbstractSelector openSelector() throws IOException {
  56         return new RdmaPollSelectorImpl(this);
  57     }
  58 
  59     public SocketChannel openSocketChannel() throws IOException {
  60         return new RdmaSocketChannelImpl(this);
  61     }
  62 
  63     public ServerSocketChannel openServerSocketChannel() throws IOException {
  64         return new RdmaServerSocketChannelImpl(this);
  65     }
  66 }