1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
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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
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24  */
25 
26 package sun.nio.ch;
27 
28 import dalvik.system.BlockGuard;
29 
30 import java.io.FileDescriptor;
31 import java.io.IOException;
32 
33 class FileDispatcherImpl extends FileDispatcher {
34 
35     // Android-removed: Code to load native libraries, doesn't make sense on Android.
36     /*
37     static {
38         IOUtil.load();
39         init();
40     }
41     */
42 
FileDispatcherImpl()43     FileDispatcherImpl() {
44     }
45 
read(FileDescriptor fd, long address, int len)46     int read(FileDescriptor fd, long address, int len) throws IOException {
47         // Android-added: BlockGuard support.
48         BlockGuard.getThreadPolicy().onReadFromDisk();
49         return read0(fd, address, len);
50     }
51 
pread(FileDescriptor fd, long address, int len, long position)52     int pread(FileDescriptor fd, long address, int len, long position)
53         throws IOException
54     {
55         // Android-added: BlockGuard support.
56         BlockGuard.getThreadPolicy().onReadFromDisk();
57         return pread0(fd, address, len, position);
58     }
59 
readv(FileDescriptor fd, long address, int len)60     long readv(FileDescriptor fd, long address, int len) throws IOException {
61         // Android-added: BlockGuard support.
62         BlockGuard.getThreadPolicy().onReadFromDisk();
63         return readv0(fd, address, len);
64     }
65 
write(FileDescriptor fd, long address, int len)66     int write(FileDescriptor fd, long address, int len) throws IOException {
67         // Android-added: BlockGuard support.
68         BlockGuard.getThreadPolicy().onWriteToDisk();
69         return write0(fd, address, len);
70     }
71 
pwrite(FileDescriptor fd, long address, int len, long position)72     int pwrite(FileDescriptor fd, long address, int len, long position)
73         throws IOException
74     {
75         // Android-added: BlockGuard support.
76         BlockGuard.getThreadPolicy().onWriteToDisk();
77         return pwrite0(fd, address, len, position);
78     }
79 
writev(FileDescriptor fd, long address, int len)80     long writev(FileDescriptor fd, long address, int len)
81         throws IOException
82     {
83         // Android-added: BlockGuard support.
84         BlockGuard.getThreadPolicy().onWriteToDisk();
85         return writev0(fd, address, len);
86     }
87 
force(FileDescriptor fd, boolean metaData)88     int force(FileDescriptor fd, boolean metaData) throws IOException {
89         // Android-added: BlockGuard support.
90         BlockGuard.getThreadPolicy().onWriteToDisk();
91         return force0(fd, metaData);
92     }
93 
truncate(FileDescriptor fd, long size)94     int truncate(FileDescriptor fd, long size) throws IOException {
95         // Android-added: BlockGuard support.
96         BlockGuard.getThreadPolicy().onWriteToDisk();
97         return truncate0(fd, size);
98     }
99 
size(FileDescriptor fd)100     long size(FileDescriptor fd) throws IOException {
101         // Android-added: BlockGuard support.
102         BlockGuard.getThreadPolicy().onReadFromDisk();
103         return size0(fd);
104     }
105 
lock(FileDescriptor fd, boolean blocking, long pos, long size, boolean shared)106     int lock(FileDescriptor fd, boolean blocking, long pos, long size,
107              boolean shared) throws IOException
108     {
109         // Android-added: BlockGuard support.
110         BlockGuard.getThreadPolicy().onWriteToDisk();
111         return lock0(fd, blocking, pos, size, shared);
112     }
113 
release(FileDescriptor fd, long pos, long size)114     void release(FileDescriptor fd, long pos, long size) throws IOException {
115         // Android-added: BlockGuard support.
116         BlockGuard.getThreadPolicy().onWriteToDisk();
117         release0(fd, pos, size);
118     }
119 
close(FileDescriptor fd)120     void close(FileDescriptor fd) throws IOException {
121         close0(fd);
122     }
123 
preClose(FileDescriptor fd)124     void preClose(FileDescriptor fd) throws IOException {
125         preClose0(fd);
126     }
127 
duplicateForMapping(FileDescriptor fd)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 
canTransferToDirectly(java.nio.channels.SelectableChannel sc)134     boolean canTransferToDirectly(java.nio.channels.SelectableChannel sc) {
135         return true;
136     }
137 
transferToDirectlyNeedsPositionLock()138     boolean transferToDirectlyNeedsPositionLock() {
139         return false;
140     }
141 
142     // -- Native methods --
143 
read0(FileDescriptor fd, long address, int len)144     static native int read0(FileDescriptor fd, long address, int len)
145         throws IOException;
146 
pread0(FileDescriptor fd, long address, int len, long position)147     static native int pread0(FileDescriptor fd, long address, int len,
148                              long position) throws IOException;
149 
readv0(FileDescriptor fd, long address, int len)150     static native long readv0(FileDescriptor fd, long address, int len)
151         throws IOException;
152 
write0(FileDescriptor fd, long address, int len)153     static native int write0(FileDescriptor fd, long address, int len)
154         throws IOException;
155 
pwrite0(FileDescriptor fd, long address, int len, long position)156     static native int pwrite0(FileDescriptor fd, long address, int len,
157                              long position) throws IOException;
158 
writev0(FileDescriptor fd, long address, int len)159     static native long writev0(FileDescriptor fd, long address, int len)
160         throws IOException;
161 
force0(FileDescriptor fd, boolean metaData)162     static native int force0(FileDescriptor fd, boolean metaData)
163         throws IOException;
164 
truncate0(FileDescriptor fd, long size)165     static native int truncate0(FileDescriptor fd, long size)
166         throws IOException;
167 
size0(FileDescriptor fd)168     static native long size0(FileDescriptor fd) throws IOException;
169 
lock0(FileDescriptor fd, boolean blocking, long pos, long size, boolean shared)170     static native int lock0(FileDescriptor fd, boolean blocking, long pos,
171                             long size, boolean shared) throws IOException;
172 
release0(FileDescriptor fd, long pos, long size)173     static native void release0(FileDescriptor fd, long pos, long size)
174         throws IOException;
175 
close0(FileDescriptor fd)176     static native void close0(FileDescriptor fd) throws IOException;
177 
preClose0(FileDescriptor fd)178     static native void preClose0(FileDescriptor fd) throws IOException;
179 
closeIntFD(int fd)180     static native void closeIntFD(int fd) throws IOException;
181 
182     // Android-removed: Code to load native libraries, doesn't make sense on Android.
183     // static native void init();
184 
185 }
186