--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/nio/channels/InterruptibleChannel.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2001 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ */
+
+package java.nio.channels;
+
+import java.io.IOException;
+
+
+/**
+ * A channel that can be asynchronously closed and interrupted.
+ *
+ * <p> A channel that implements this interface is <i>asynchronously
+ * closeable:</i> If a thread is blocked in an I/O operation on an
+ * interruptible channel then another thread may invoke the channel's {@link
+ * #close close} method.  This will cause the blocked thread to receive an
+ * {@link AsynchronousCloseException}.
+ *
+ * <p> A channel that implements this interface is also <i>interruptible:</i>
+ * If a thread is blocked in an I/O operation on an interruptible channel then
+ * another thread may invoke the blocked thread's {@link Thread#interrupt()
+ * interrupt} method.  This will cause the channel to be closed, the blocked
+ * thread to receive a {@link ClosedByInterruptException}, and the blocked
+ * thread's interrupt status to be set.
+ *
+ * <p> If a thread's interrupt status is already set and it invokes a blocking
+ * I/O operation upon a channel then the channel will be closed and the thread
+ * will immediately receive a {@link ClosedByInterruptException}; its interrupt
+ * status will remain set.
+ *
+ * <p> A channel supports asynchronous closing and interruption if, and only
+ * if, it implements this interface.  This can be tested at runtime, if
+ * necessary, via the <tt>instanceof</tt> operator.
+ *
+ *
+ * @author Mark Reinhold
+ * @author JSR-51 Expert Group
+ * @since 1.4
+ */
+
+public interface InterruptibleChannel
+    extends Channel
+{
+
+    /**
+     * Closes this channel.
+     *
+     * <p> Any thread currently blocked in an I/O operation upon this channel
+     * will receive an {@link AsynchronousCloseException}.
+     *
+     * <p> This method otherwise behaves exactly as specified by the {@link
+     * Channel#close Channel} interface.  </p>
+     *
+     * @throws  IOException  If an I/O error occurs
+     */
+    public void close() throws IOException;
+
+}