1 /* 2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.nio.ch; 27 28 import dalvik.system.BlockGuard; 29 import dalvik.system.SocketTagger; 30 31 import java.io.*; 32 import java.net.SocketException; 33 34 class FileDispatcherImpl extends FileDispatcher 35 { 36 37 FileDispatcherImpl(boolean append) { 38 /* append is ignored */ 39 } 40 41 FileDispatcherImpl() { 42 } 43 44 int read(FileDescriptor fd, long address, int len) throws IOException { 45 BlockGuard.getThreadPolicy().onReadFromDisk(); 46 return read0(fd, address, len); 47 } 48 49 int pread(FileDescriptor fd, long address, int len, long position) 50 throws IOException 51 { 52 BlockGuard.getThreadPolicy().onReadFromDisk(); 53 return pread0(fd, address, len, position); 54 } 55 56 long readv(FileDescriptor fd, long address, int len) throws IOException { 57 BlockGuard.getThreadPolicy().onReadFromDisk(); 58 return readv0(fd, address, len); 59 } 60 61 int write(FileDescriptor fd, long address, int len) throws IOException { 62 BlockGuard.getThreadPolicy().onWriteToDisk(); 63 return write0(fd, address, len); 64 } 65 66 int pwrite(FileDescriptor fd, long address, int len, long position) 67 throws IOException 68 { 69 BlockGuard.getThreadPolicy().onWriteToDisk(); 70 return pwrite0(fd, address, len, position); 71 } 72 73 long writev(FileDescriptor fd, long address, int len) 74 throws IOException 75 { 76 BlockGuard.getThreadPolicy().onWriteToDisk(); 77 return writev0(fd, address, len); 78 } 79 80 int force(FileDescriptor fd, boolean metaData) throws IOException { 81 BlockGuard.getThreadPolicy().onWriteToDisk(); 82 return force0(fd, metaData); 83 } 84 85 int truncate(FileDescriptor fd, long size) throws IOException { 86 BlockGuard.getThreadPolicy().onWriteToDisk(); 87 return truncate0(fd, size); 88 } 89 90 long size(FileDescriptor fd) throws IOException { 91 BlockGuard.getThreadPolicy().onReadFromDisk(); 92 return size0(fd); 93 } 94 95 int lock(FileDescriptor fd, boolean blocking, long pos, long size, 96 boolean shared) throws IOException 97 { 98 BlockGuard.getThreadPolicy().onWriteToDisk(); 99 return lock0(fd, blocking, pos, size, shared); 100 } 101 102 void release(FileDescriptor fd, long pos, long size) throws IOException { 103 BlockGuard.getThreadPolicy().onWriteToDisk(); 104 release0(fd, pos, size); 105 } 106 107 void close(FileDescriptor fd) throws IOException { 108 close0(fd); 109 } 110 111 void preClose(FileDescriptor fd) throws IOException { 112 preCloseImpl(fd); 113 } 114 115 static void preCloseImpl(FileDescriptor fd) throws IOException { 116 if (fd.isSocket$()) { 117 // Always untag sockets before the preClose. The file descriptor will describe 118 // a different file (/dev/null) after preClose0. 119 try { 120 SocketTagger.get().untag(fd); 121 } catch (SocketException ignored) { 122 } 123 } 124 125 preClose0(fd); 126 } 127 128 FileDescriptor duplicateForMapping(FileDescriptor fd) { 129 // file descriptor not required for mapping operations; okay 130 // to return invalid file descriptor. 131 return new FileDescriptor(); 132 } 133 134 // -- Native methods -- 135 136 static native int read0(FileDescriptor fd, long address, int len) 137 throws IOException; 138 139 static native int pread0(FileDescriptor fd, long address, int len, 140 long position) throws IOException; 141 142 static native long readv0(FileDescriptor fd, long address, int len) 143 throws IOException; 144 145 static native int write0(FileDescriptor fd, long address, int len) 146 throws IOException; 147 148 static native int pwrite0(FileDescriptor fd, long address, int len, 149 long position) throws IOException; 150 151 static native long writev0(FileDescriptor fd, long address, int len) 152 throws IOException; 153 154 static native int force0(FileDescriptor fd, boolean metaData) 155 throws IOException; 156 157 static native int truncate0(FileDescriptor fd, long size) 158 throws IOException; 159 160 static native long size0(FileDescriptor fd) throws IOException; 161 162 static native int lock0(FileDescriptor fd, boolean blocking, long pos, 163 long size, boolean shared) throws IOException; 164 165 static native void release0(FileDescriptor fd, long pos, long size) 166 throws IOException; 167 168 static native void close0(FileDescriptor fd) throws IOException; 169 170 private static native void preClose0(FileDescriptor fd) throws IOException; 171 172 static native void closeIntFD(int fd) throws IOException; 173 174 } 175
