DatagramDispatcher.java revision 74062e1c405d0943159bb52dcacd4df240e60621 
1/*
2 * Copyright (c) 2001, 2009, 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
26package sun.nio.ch;
27
28import dalvik.system.BlockGuard;
29
30import java.io.*;
31import java.net.*;
32
33/**
34 * Allows different platforms to call different native methods
35 * for read and write operations.
36 */
37
38class DatagramDispatcher extends NativeDispatcher
39{
40    static {
41        Util.load();
42    }
43
44    int read(FileDescriptor fd, long address, int len) throws IOException {
45        BlockGuard.getThreadPolicy().onNetwork();
46        return read0(fd, address, len);
47    }
48
49    long readv(FileDescriptor fd, long address, int len) throws IOException {
50        BlockGuard.getThreadPolicy().onNetwork();
51        return readv0(fd, address, len);
52    }
53
54    int write(FileDescriptor fd, long address, int len) throws IOException {
55        BlockGuard.getThreadPolicy().onNetwork();
56        return write0(fd, address, len);
57    }
58
59    long writev(FileDescriptor fd, long address, int len) throws IOException {
60        BlockGuard.getThreadPolicy().onNetwork();
61        return writev0(fd, address, len);
62    }
63
64    void close(FileDescriptor fd) throws IOException {
65        FileDispatcherImpl.close0(fd);
66    }
67
68    void preClose(FileDescriptor fd) throws IOException {
69        FileDispatcherImpl.preClose0(fd);
70    }
71
72    static native int read0(FileDescriptor fd, long address, int len)
73        throws IOException;
74
75    static native long readv0(FileDescriptor fd, long address, int len)
76        throws IOException;
77
78    static native int write0(FileDescriptor fd, long address, int len)
79        throws IOException;
80
81    static native long writev0(FileDescriptor fd, long address, int len)
82        throws IOException;
83}
84