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+/* EpollSelectionKeyImpl.java -- selection key for the epoll selector.
+ Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.java.nio;
+
+import java.io.IOException;
+import java.nio.channels.CancelledKeyException;
+import java.nio.channels.SelectableChannel;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.Selector;
+import java.nio.channels.spi.AbstractSelectionKey;
+
+/**
+ * @author Casey Marshall (csm@gnu.org)
+ */
+public class EpollSelectionKeyImpl extends AbstractSelectionKey
+{
+ final int fd;
+ private final EpollSelectorImpl selector;
+ private final SelectableChannel channel;
+ int interestOps;
+ int selectedOps;
+ int key;
+ boolean valid;
+ boolean cancelled;
+
+ EpollSelectionKeyImpl(EpollSelectorImpl selector,
+ SelectableChannel channel, int fd)
+ {
+ this.selector = selector;
+ this.channel = channel;
+ this.fd = fd;
+ }
+
+ /* (non-Javadoc)
+ * @see java.nio.channels.SelectionKey#channel()
+ */
+ public SelectableChannel channel()
+ {
+ return channel;
+ }
+
+ /* (non-Javadoc)
+ * @see java.nio.channels.SelectionKey#interestOps()
+ */
+ public int interestOps()
+ {
+ return interestOps;
+ }
+
+ /* (non-Javadoc)
+ * @see java.nio.channels.SelectionKey#interestOps(int)
+ */
+ public SelectionKey interestOps(int ops)
+ {
+ if (cancelled)
+ throw new CancelledKeyException();
+ if ((ops & ~(channel.validOps())) != 0)
+ throw new IllegalArgumentException("unsupported channel ops");
+ try
+ {
+ selector.epoll_modify(this, ops);
+ interestOps = ops;
+ }
+ catch (IOException ioe)
+ {
+ throw new IllegalArgumentException(ioe);
+ }
+ return this;
+ }
+
+ /* (non-Javadoc)
+ * @see java.nio.channels.SelectionKey#readyOps()
+ */
+ public int readyOps()
+ {
+ return selectedOps;
+ }
+
+ /* (non-Javadoc)
+ * @see java.nio.channels.SelectionKey#selector()
+ */
+ public Selector selector()
+ {
+ return selector;
+ }
+}