1 /* 2 * Copyright (c) 2008, 2010, 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 sun.nio.ch; 27 28 import java.nio.channels.*; 29 import java.nio.channels.spi.AsynchronousChannelProvider; 30 import java.util.concurrent.ExecutorService; 31 import java.util.concurrent.ThreadFactory; 32 import java.io.IOException; 33 34 public class LinuxAsynchronousChannelProvider 35 extends AsynchronousChannelProvider 36 { 37 private static volatile EPollPort defaultPort; 38 defaultEventPort()39 private EPollPort defaultEventPort() throws IOException { 40 if (defaultPort == null) { 41 synchronized (LinuxAsynchronousChannelProvider.class) { 42 if (defaultPort == null) { 43 defaultPort = new EPollPort(this, ThreadPool.getDefault()).start(); 44 } 45 } 46 } 47 return defaultPort; 48 } 49 LinuxAsynchronousChannelProvider()50 public LinuxAsynchronousChannelProvider() { 51 } 52 53 @Override openAsynchronousChannelGroup(int nThreads, ThreadFactory factory)54 public AsynchronousChannelGroup openAsynchronousChannelGroup(int nThreads, ThreadFactory factory) 55 throws IOException 56 { 57 return new EPollPort(this, ThreadPool.create(nThreads, factory)).start(); 58 } 59 60 @Override openAsynchronousChannelGroup(ExecutorService executor, int initialSize)61 public AsynchronousChannelGroup openAsynchronousChannelGroup(ExecutorService executor, int initialSize) 62 throws IOException 63 { 64 return new EPollPort(this, ThreadPool.wrap(executor, initialSize)).start(); 65 } 66 toPort(AsynchronousChannelGroup group)67 private Port toPort(AsynchronousChannelGroup group) throws IOException { 68 if (group == null) { 69 return defaultEventPort(); 70 } else { 71 if (!(group instanceof EPollPort)) 72 throw new IllegalChannelGroupException(); 73 return (Port)group; 74 } 75 } 76 77 @Override openAsynchronousServerSocketChannel(AsynchronousChannelGroup group)78 public AsynchronousServerSocketChannel openAsynchronousServerSocketChannel(AsynchronousChannelGroup group) 79 throws IOException 80 { 81 return new UnixAsynchronousServerSocketChannelImpl(toPort(group)); 82 } 83 84 @Override openAsynchronousSocketChannel(AsynchronousChannelGroup group)85 public AsynchronousSocketChannel openAsynchronousSocketChannel(AsynchronousChannelGroup group) 86 throws IOException 87 { 88 return new UnixAsynchronousSocketChannelImpl(toPort(group)); 89 } 90 } 91