| /* |
| * Copyright (c) 2000, 2013, 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.*; |
| |
| /** |
| * Allows different platforms to call different native methods |
| * for read and write operations. |
| */ |
| |
| abstract class NativeDispatcher |
| { |
| |
| abstract int read(FileDescriptor fd, long address, int len) |
| throws IOException; |
| |
| /** |
| * Returns {@code true} if pread/pwrite needs to be synchronized with |
| * position sensitive methods. |
| */ |
| boolean needsPositionLock() { |
| return false; |
| } |
| |
| int pread(FileDescriptor fd, long address, int len, long position) |
| throws IOException |
| { |
| throw new IOException("Operation Unsupported"); |
| } |
| |
| abstract long readv(FileDescriptor fd, long address, int len) |
| throws IOException; |
| |
| abstract int write(FileDescriptor fd, long address, int len) |
| throws IOException; |
| |
| int pwrite(FileDescriptor fd, long address, int len, long position) |
| throws IOException |
| { |
| throw new IOException("Operation Unsupported"); |
| } |
| |
| abstract long writev(FileDescriptor fd, long address, int len) |
| throws IOException; |
| |
| abstract void close(FileDescriptor fd) throws IOException; |
| |
| // Prepare the given fd for closing by duping it to a known internal fd |
| // that's already closed. This is necessary on some operating systems |
| // (Solaris and Linux) to prevent fd recycling. |
| // |
| void preClose(FileDescriptor fd) throws IOException { |
| // Do nothing by default; this is only needed on Unix |
| } |
| |
| } |