mirror of git://gcc.gnu.org/git/gcc.git
122 lines
4.0 KiB
Java
122 lines
4.0 KiB
Java
/* SelectorProviderImpl.java --
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Copyright (C) 2002, 2003 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.nio;
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import gnu.classpath.SystemProperties;
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import java.io.IOException;
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import java.nio.channels.DatagramChannel;
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import java.nio.channels.Pipe;
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import java.nio.channels.ServerSocketChannel;
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import java.nio.channels.SocketChannel;
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import java.nio.channels.spi.AbstractSelector;
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import java.nio.channels.spi.SelectorProvider;
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public class SelectorProviderImpl extends SelectorProvider
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{
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private static final String SELECTOR_IMPL_KQUEUE = "kqueue";
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private static final String SELECTOR_IMPL_EPOLL = "epoll";
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private static final String SELECTOR_IMPL = "gnu.java.nio.selectorImpl";
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private static boolean epoll_failed = false;
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public SelectorProviderImpl ()
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{
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}
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public DatagramChannel openDatagramChannel ()
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throws IOException
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{
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return new DatagramChannelImpl (this);
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}
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public Pipe openPipe ()
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throws IOException
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{
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return new PipeImpl (this);
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}
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public AbstractSelector openSelector ()
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throws IOException
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{
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String selectorImpl = "default";
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if (KqueueSelectorImpl.kqueue_supported())
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selectorImpl = SELECTOR_IMPL_KQUEUE;
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if (EpollSelectorImpl.epoll_supported() && !epoll_failed)
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selectorImpl = SELECTOR_IMPL_EPOLL;
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selectorImpl = SystemProperties.getProperty(SELECTOR_IMPL, selectorImpl);
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if (selectorImpl.equals(SELECTOR_IMPL_KQUEUE))
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return new KqueueSelectorImpl(this);
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if (selectorImpl.equals(SELECTOR_IMPL_EPOLL))
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{
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// We jump through these hoops because even though epoll may look
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// like it's available (sys/epoll.h exists, and you can link against
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// all the epoll functions) it may not be available in the kernel
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// (especially 2.4 kernels), meaning you will get ENOSYS at run time.
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//
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// Madness!
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try
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{
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return new EpollSelectorImpl(this);
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}
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catch (InternalError e)
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{
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// epoll_create throws this on ENOSYS.
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epoll_failed = true;
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}
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}
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return new SelectorImpl (this);
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}
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public ServerSocketChannel openServerSocketChannel ()
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throws IOException
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{
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return new ServerSocketChannelImpl (this);
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}
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public SocketChannel openSocketChannel ()
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throws IOException
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{
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return new SocketChannelImpl (this);
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}
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}
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