| /* |
| * Copyright (c) 2001, 2009, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.nio.ch; |
| |
| import java.io.IOException; |
| import java.nio.channels.*; |
| |
| public class FileLockImpl |
| extends FileLock |
| { |
| private volatile boolean valid = true; |
| |
| FileLockImpl(FileChannel channel, long position, long size, boolean shared) |
| { |
| super(channel, position, size, shared); |
| } |
| |
| FileLockImpl(AsynchronousFileChannel channel, long position, long size, boolean shared) |
| { |
| super(channel, position, size, shared); |
| } |
| |
| public boolean isValid() { |
| return valid; |
| } |
| |
| void invalidate() { |
| assert Thread.holdsLock(this); |
| valid = false; |
| } |
| |
| public synchronized void release() throws IOException { |
| Channel ch = acquiredBy(); |
| if (!ch.isOpen()) |
| throw new ClosedChannelException(); |
| if (valid) { |
| if (ch instanceof FileChannelImpl) |
| ((FileChannelImpl)ch).release(this); |
| else if (ch instanceof AsynchronousFileChannelImpl) |
| ((AsynchronousFileChannelImpl)ch).release(this); |
| else throw new AssertionError(); |
| valid = false; |
| } |
| } |
| } |