1 /*

     2  * Copyright 2000-2002 Sun Microsystems, Inc.  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.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package sun.nio.ch;

    27 

    28 import java.io.*;

    29 

    30 /**

    31  * Allows different platforms to call different native methods

    32  * for read and write operations.

    33  */

    34 

    35 class FileDispatcher extends NativeDispatcher

    36 {

    37 

    38     static {

    39         Util.load();

    40         init();

    41     }

    42 

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

    44         return read0(fd, address, len);

    45     }

    46 

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

    48                              long position, Object lock) throws IOException {

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

    50     }

    51 

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

    53         return readv0(fd, address, len);

    54     }

    55 

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

    57         return write0(fd, address, len);

    58     }

    59 

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

    61                              long position, Object lock) throws IOException

    62     {

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

    64     }

    65 

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

    67         throws IOException

    68     {

    69         return writev0(fd, address, len);

    70     }

    71 

    72     void close(FileDescriptor fd) throws IOException {

    73         close0(fd);

    74     }

    75 

    76     void preClose(FileDescriptor fd) throws IOException {

    77         preClose0(fd);

    78     }

    79 

    80     // -- Native methods --

    81 

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

    83         throws IOException;

    84 

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

    86                              long position) throws IOException;

    87 

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

    89         throws IOException;

    90 

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

    92         throws IOException;

    93 

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

    95                              long position) throws IOException;

    96 

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

    98         throws IOException;

    99 

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

   101 

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

   103 

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

   105 

   106     static native void init();

   107 

   108 }