151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* 2519adb2f61bb2bfa6cc993b1ca15cf7022b96697Shubham Ajmera * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. 351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is free software; you can redistribute it and/or modify it 651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * under the terms of the GNU General Public License version 2 only, as 751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * published by the Free Software Foundation. Oracle designates this 851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * particular file as subject to the "Classpath" exception as provided 951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * by Oracle in the LICENSE file that accompanied this code. 1051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is distributed in the hope that it will be useful, but WITHOUT 1251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * version 2 for more details (a copy is included in the LICENSE file that 1551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * accompanied this code). 1651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * You should have received a copy of the GNU General Public License version 1851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2 along with this work; if not, write to the Free Software Foundation, 1951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * or visit www.oracle.com if you need additional information or have any 2351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * questions. 2451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 2551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskipackage sun.nio.ch; 2751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskiimport java.io.*; 2951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/** 3151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Allows different platforms to call different native methods 3251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * for read and write operations. 3351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 3451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskiabstract class NativeDispatcher 3651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski{ 3751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski abstract int read(FileDescriptor fd, long address, int len) 3951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throws IOException; 4051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 4151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 4251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Returns {@code true} if pread/pwrite needs to be synchronized with 4351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * position sensitive methods. 4451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 4551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski boolean needsPositionLock() { 4651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return false; 4751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 4851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 4951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski int pread(FileDescriptor fd, long address, int len, long position) 5051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throws IOException 5151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski { 5251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throw new IOException("Operation Unsupported"); 5351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 5451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski abstract long readv(FileDescriptor fd, long address, int len) 5651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throws IOException; 5751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski abstract int write(FileDescriptor fd, long address, int len) 5951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throws IOException; 6051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski int pwrite(FileDescriptor fd, long address, int len, long position) 6251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throws IOException 6351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski { 6451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throw new IOException("Operation Unsupported"); 6551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 6651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski abstract long writev(FileDescriptor fd, long address, int len) 6851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throws IOException; 6951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 7051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski abstract void close(FileDescriptor fd) throws IOException; 7151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 7251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski // Prepare the given fd for closing by duping it to a known internal fd 7351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski // that's already closed. This is necessary on some operating systems 7451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski // (Solaris and Linux) to prevent fd recycling. 7551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski // 7651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski void preClose(FileDescriptor fd) throws IOException { 7751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski // Do nothing by default; this is only needed on Unix 7851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 7951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 8051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 81