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 java.io.*;

       29 

       30 class FileDispatcherImpl extends FileDispatcher

       31 {

       32 

       33     static {

       34         Util.load();

       35         init();

       36     }

       37 

       38     FileDispatcherImpl(boolean append) {

       39         /* append is ignored */

       40     }

       41 

       42     FileDispatcherImpl() {

       43     }

       44 

       45     int read(FileDescriptor fd, long address, int len) throws IOException {

       46         return read0(fd, address, len);

       47     }

       48 

       49     int pread(FileDescriptor fd, long address, int len,

       50                              long position, Object lock) throws IOException {

       51         return pread0(fd, address, len, position);

       52     }

       53 

       54     long readv(FileDescriptor fd, long address, int len) throws IOException {

       55         return readv0(fd, address, len);

       56     }

       57 

       58     int write(FileDescriptor fd, long address, int len) throws IOException {

       59         return write0(fd, address, len);

       60     }

       61 

       62     int pwrite(FileDescriptor fd, long address, int len,

       63                              long position, Object lock) throws IOException

       64     {

       65         return pwrite0(fd, address, len, position);

       66     }

       67 

       68     long writev(FileDescriptor fd, long address, int len)

       69         throws IOException

       70     {

       71         return writev0(fd, address, len);

       72     }

       73 

       74     int force(FileDescriptor fd, boolean metaData) throws IOException {

       75         return force0(fd, metaData);

       76     }

       77 

       78     int truncate(FileDescriptor fd, long size) throws IOException {

       79         return truncate0(fd, size);

       80     }

       81 

       82     long size(FileDescriptor fd) throws IOException {

       83         return size0(fd);

       84     }

       85 

       86     int lock(FileDescriptor fd, boolean blocking, long pos, long size,

       87              boolean shared) throws IOException

       88     {

       89         return lock0(fd, blocking, pos, size, shared);

       90     }

       91 

       92     void release(FileDescriptor fd, long pos, long size) throws IOException {

       93         release0(fd, pos, size);

       94     }

       95 

       96     void close(FileDescriptor fd) throws IOException {

       97         close0(fd);

       98     }

       99 

      100     void preClose(FileDescriptor fd) throws IOException {

      101         preClose0(fd);

      102     }

      103 

      104     FileDescriptor duplicateForMapping(FileDescriptor fd) {

      105         // file descriptor not required for mapping operations; okay

      106         // to return invalid file descriptor.

      107         return new FileDescriptor();

      108     }

      109 

      110     // -- Native methods --

      111 

      112     static native int read0(FileDescriptor fd, long address, int len)

      113         throws IOException;

      114 

      115     static native int pread0(FileDescriptor fd, long address, int len,

      116                              long position) throws IOException;

      117 

      118     static native long readv0(FileDescriptor fd, long address, int len)

      119         throws IOException;

      120 

      121     static native int write0(FileDescriptor fd, long address, int len)

      122         throws IOException;

      123 

      124     static native int pwrite0(FileDescriptor fd, long address, int len,

      125                              long position) throws IOException;

      126 

      127     static native long writev0(FileDescriptor fd, long address, int len)

      128         throws IOException;

      129 

      130     static native int force0(FileDescriptor fd, boolean metaData)

      131         throws IOException;

      132 

      133     static native int truncate0(FileDescriptor fd, long size)

      134         throws IOException;

      135 

      136     static native long size0(FileDescriptor fd) throws IOException;

      137 

      138     static native int lock0(FileDescriptor fd, boolean blocking, long pos,

      139                             long size, boolean shared) throws IOException;

      140 

      141     static native void release0(FileDescriptor fd, long pos, long size)

      142         throws IOException;

      143 

      144     static native void close0(FileDescriptor fd) throws IOException;

      145 

      146     static native void preClose0(FileDescriptor fd) throws IOException;

      147 

      148     static native void closeIntFD(int fd) throws IOException;

      149 

      150     static native void init();

      151 

      152 }