1/*
2 * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.  Oracle designates this
9 * particular file as subject to the "Classpath" exception as provided
10 * by Oracle in the LICENSE file that accompanied this code.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
23 * or visit www.oracle.com if you need additional information or have any
24 * questions.
25 */
26
27package sun.nio.ch;
28
29import java.nio.channels.*;
30import java.nio.channels.spi.AsynchronousChannelProvider;
31import java.util.concurrent.ExecutorService;
32import java.util.concurrent.ThreadFactory;
33import java.io.IOException;
34
35public class AixAsynchronousChannelProvider
36    extends AsynchronousChannelProvider
37{
38    private static volatile AixPollPort defaultPort;
39
40    private AixPollPort defaultEventPort() throws IOException {
41        if (defaultPort == null) {
42            synchronized (AixAsynchronousChannelProvider.class) {
43                if (defaultPort == null) {
44                    defaultPort = new AixPollPort(this, ThreadPool.getDefault()).start();
45                }
46            }
47        }
48        return defaultPort;
49    }
50
51    public AixAsynchronousChannelProvider() {
52    }
53
54    @Override
55    public AsynchronousChannelGroup openAsynchronousChannelGroup(int nThreads, ThreadFactory factory)
56        throws IOException
57    {
58        return new AixPollPort(this, ThreadPool.create(nThreads, factory)).start();
59    }
60
61    @Override
62    public AsynchronousChannelGroup openAsynchronousChannelGroup(ExecutorService executor, int initialSize)
63        throws IOException
64    {
65        return new AixPollPort(this, ThreadPool.wrap(executor, initialSize)).start();
66    }
67
68    private Port toPort(AsynchronousChannelGroup group) throws IOException {
69        if (group == null) {
70            return defaultEventPort();
71        } else {
72            if (!(group instanceof AixPollPort))
73                throw new IllegalChannelGroupException();
74            return (Port)group;
75        }
76    }
77
78    @Override
79    public AsynchronousServerSocketChannel openAsynchronousServerSocketChannel(AsynchronousChannelGroup group)
80        throws IOException
81    {
82        return new UnixAsynchronousServerSocketChannelImpl(toPort(group));
83    }
84
85    @Override
86    public AsynchronousSocketChannel openAsynchronousSocketChannel(AsynchronousChannelGroup group)
87        throws IOException
88    {
89        return new UnixAsynchronousSocketChannelImpl(toPort(group));
90    }
91}
92