| /* |
| * Copyright (c) 2007, 2016, 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.FileDescriptor; |
| import java.io.IOException; |
| import java.nio.channels.SelectableChannel; |
| |
| abstract class FileDispatcher extends NativeDispatcher { |
| |
| public static final int NO_LOCK = -1; // Failed to lock |
| public static final int LOCKED = 0; // Obtained requested lock |
| public static final int RET_EX_LOCK = 1; // Obtained exclusive lock |
| public static final int INTERRUPTED = 2; // Request interrupted |
| |
| abstract int force(FileDescriptor fd, boolean metaData) throws IOException; |
| |
| abstract int truncate(FileDescriptor fd, long size) throws IOException; |
| |
| abstract int allocate(FileDescriptor fd, long size) throws IOException; |
| |
| abstract long size(FileDescriptor fd) throws IOException; |
| |
| abstract int lock(FileDescriptor fd, boolean blocking, long pos, long size, |
| boolean shared) throws IOException; |
| |
| abstract void release(FileDescriptor fd, long pos, long size) |
| throws IOException; |
| |
| /** |
| * Returns a dup of fd if a file descriptor is required for |
| * memory-mapping operations, otherwise returns an invalid |
| * FileDescriptor (meaning a newly allocated FileDescriptor) |
| */ |
| abstract FileDescriptor duplicateForMapping(FileDescriptor fd) |
| throws IOException; |
| |
| abstract boolean canTransferToDirectly(SelectableChannel sc); |
| |
| abstract boolean transferToDirectlyNeedsPositionLock(); |
| } |