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      1 /*
      2  * Copyright (c) 2001, 2013, 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 
     30 import java.io.*;
     31 import java.net.*;
     32 
     33 /**
     34  * Allows different platforms to call different native methods
     35  * for read and write operations.
     36  */
     37 
     38 class DatagramDispatcher extends NativeDispatcher
     39 {
     40     int read(FileDescriptor fd, long address, int len) throws IOException {
     41         BlockGuard.getThreadPolicy().onNetwork();
     42         return read0(fd, address, len);
     43     }
     44 
     45     long readv(FileDescriptor fd, long address, int len) throws IOException {
     46         BlockGuard.getThreadPolicy().onNetwork();
     47         return readv0(fd, address, len);
     48     }
     49 
     50     int write(FileDescriptor fd, long address, int len) throws IOException {
     51         BlockGuard.getThreadPolicy().onNetwork();
     52         return write0(fd, address, len);
     53     }
     54 
     55     long writev(FileDescriptor fd, long address, int len) throws IOException {
     56         BlockGuard.getThreadPolicy().onNetwork();
     57         return writev0(fd, address, len);
     58     }
     59 
     60     void close(FileDescriptor fd) throws IOException {
     61         FileDispatcherImpl.close0(fd);
     62     }
     63 
     64     void preClose(FileDescriptor fd) throws IOException {
     65         FileDispatcherImpl.preClose0(fd);
     66     }
     67 
     68     static native int read0(FileDescriptor fd, long address, int len)
     69         throws IOException;
     70 
     71     static native long readv0(FileDescriptor fd, long address, int len)
     72         throws IOException;
     73 
     74     static native int write0(FileDescriptor fd, long address, int len)
     75         throws IOException;
     76 
     77     static native long writev0(FileDescriptor fd, long address, int len)
     78         throws IOException;
     79 }
     80