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 WindowsAsynchronousChannelProvider 35 extends AsynchronousChannelProvider 36 { 37 private static volatile Iocp defaultIocp; 38 WindowsAsynchronousChannelProvider()39 public WindowsAsynchronousChannelProvider() { 40 // nothing to do 41 } 42 defaultIocp()43 private Iocp defaultIocp() throws IOException { 44 if (defaultIocp == null) { 45 synchronized (WindowsAsynchronousChannelProvider.class) { 46 if (defaultIocp == null) { 47 // default thread pool may be shared with AsynchronousFileChannels 48 defaultIocp = new Iocp(this, ThreadPool.getDefault()).start(); 49 } 50 } 51 } 52 return defaultIocp; 53 } 54 55 @Override openAsynchronousChannelGroup(int nThreads, ThreadFactory factory)56 public AsynchronousChannelGroup openAsynchronousChannelGroup(int nThreads, ThreadFactory factory) 57 throws IOException 58 { 59 return new Iocp(this, ThreadPool.create(nThreads, factory)).start(); 60 } 61 62 @Override openAsynchronousChannelGroup(ExecutorService executor, int initialSize)63 public AsynchronousChannelGroup openAsynchronousChannelGroup(ExecutorService executor, int initialSize) 64 throws IOException 65 { 66 return new Iocp(this, ThreadPool.wrap(executor, initialSize)).start(); 67 } 68 toIocp(AsynchronousChannelGroup group)69 private Iocp toIocp(AsynchronousChannelGroup group) throws IOException { 70 if (group == null) { 71 return defaultIocp(); 72 } else { 73 if (!(group instanceof Iocp)) 74 throw new IllegalChannelGroupException(); 75 return (Iocp)group; 76 } 77 } 78 79 @Override openAsynchronousServerSocketChannel(AsynchronousChannelGroup group)80 public AsynchronousServerSocketChannel openAsynchronousServerSocketChannel(AsynchronousChannelGroup group) 81 throws IOException 82 { 83 return new WindowsAsynchronousServerSocketChannelImpl(toIocp(group)); 84 } 85 86 @Override openAsynchronousSocketChannel(AsynchronousChannelGroup group)87 public AsynchronousSocketChannel openAsynchronousSocketChannel(AsynchronousChannelGroup group) 88 throws IOException 89 { 90 return new WindowsAsynchronousSocketChannelImpl(toIocp(group)); 91 } 92 } 93