From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../java/nio/channels/spi/AbstractSelector.java | 167 +++++++++++++++++++++ 1 file changed, 167 insertions(+) create mode 100644 libjava/classpath/java/nio/channels/spi/AbstractSelector.java (limited to 'libjava/classpath/java/nio/channels/spi/AbstractSelector.java') diff --git a/libjava/classpath/java/nio/channels/spi/AbstractSelector.java b/libjava/classpath/java/nio/channels/spi/AbstractSelector.java new file mode 100644 index 000000000..b67d4aecc --- /dev/null +++ b/libjava/classpath/java/nio/channels/spi/AbstractSelector.java @@ -0,0 +1,167 @@ +/* AbstractSelector.java -- + Copyright (C) 2002, 2003, 2004, 2005 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 java.nio.channels.spi; + +import java.io.IOException; +import java.nio.channels.ClosedSelectorException; +import java.nio.channels.SelectionKey; +import java.nio.channels.Selector; +import java.util.HashSet; +import java.util.Set; + + +public abstract class AbstractSelector extends Selector +{ + private boolean closed; + private SelectorProvider provider; + private HashSet cancelledKeys; + + /** + * Initializes the slector. + * + * @param provider the provider that created this selector + */ + protected AbstractSelector(SelectorProvider provider) + { + this.provider = provider; + this.cancelledKeys = new HashSet(); + } + + /** + * Closes the channel. + * + * @exception IOException If an error occurs + */ + public final synchronized void close() throws IOException + { + if (closed) + return; + + implCloseSelector(); + closed = true; + } + + /** + * Tells whether this channel is open or not. + * + * @return true if channel is open, false otherwise. + */ + public final boolean isOpen() + { + return ! closed; + } + + /** + * Marks the beginning of an I/O operation that might block indefinitely. + */ + protected final void begin() + { + } + + /** + * Marks the end of an I/O operation that might block indefinitely. + */ + protected final void end() + { + } + + /** + * Returns the provider for this selector object. + * + * @return the SelectorProvider object that created this seletor + */ + public final SelectorProvider provider() + { + return provider; + } + + /** + * Returns the cancelled keys set. + * + * @return the cancelled keys set + */ + protected final Set cancelledKeys() + { + if (! isOpen()) + throw new ClosedSelectorException(); + + return cancelledKeys; + } + + /** + * Cancels a selection key. + */ + + // This method is only called by AbstractSelectionKey.cancel(). + final void cancelKey(AbstractSelectionKey key) + { + synchronized (cancelledKeys) + { + cancelledKeys.add(key); + } + } + + /** + * Closes the channel. + * + * @exception IOException if an error occurs + */ + protected abstract void implCloseSelector() throws IOException; + + /** + * Registers a channel for the selection process. + * + * @param ch the channel register + * @param ops the interested operations + * @param att an attachement to the selection key + * + * @return the registered selection key + */ + protected abstract SelectionKey register(AbstractSelectableChannel ch, + int ops, Object att); + + /** + * Deregisters the given selection key. + * + * @param key the key to deregister + */ + protected final void deregister(AbstractSelectionKey key) + { + ((AbstractSelectableChannel) key.channel()).removeSelectionKey(key); + } +} -- cgit v1.2.3