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.
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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(boolean append)43     FileDispatcherImpl(boolean append) {
44         /* append is ignored */
45     }
46 
FileDispatcherImpl()47     FileDispatcherImpl() {
48     }
49 
read(FileDescriptor fd, long address, int len)50     int read(FileDescriptor fd, long address, int len) throws IOException {
51         // Android-added: BlockGuard support.
52         BlockGuard.getThreadPolicy().onReadFromDisk();
53         return read0(fd, address, len);
54     }
55 
pread(FileDescriptor fd, long address, int len, long position)56     int pread(FileDescriptor fd, long address, int len, long position)
57         throws IOException
58     {
59         // Android-added: BlockGuard support.
60         BlockGuard.getThreadPolicy().onReadFromDisk();
61         return pread0(fd, address, len, position);
62     }
63 
readv(FileDescriptor fd, long address, int len)64     long readv(FileDescriptor fd, long address, int len) throws IOException {
65         // Android-added: BlockGuard support.
66         BlockGuard.getThreadPolicy().onReadFromDisk();
67         return readv0(fd, address, len);
68     }
69 
write(FileDescriptor fd, long address, int len)70     int write(FileDescriptor fd, long address, int len) throws IOException {
71         // Android-added: BlockGuard support.
72         BlockGuard.getThreadPolicy().onWriteToDisk();
73         return write0(fd, address, len);
74     }
75 
pwrite(FileDescriptor fd, long address, int len, long position)76     int pwrite(FileDescriptor fd, long address, int len, long position)
77         throws IOException
78     {
79         // Android-added: BlockGuard support.
80         BlockGuard.getThreadPolicy().onWriteToDisk();
81         return pwrite0(fd, address, len, position);
82     }
83 
writev(FileDescriptor fd, long address, int len)84     long writev(FileDescriptor fd, long address, int len)
85         throws IOException
86     {
87         // Android-added: BlockGuard support.
88         BlockGuard.getThreadPolicy().onWriteToDisk();
89         return writev0(fd, address, len);
90     }
91 
force(FileDescriptor fd, boolean metaData)92     int force(FileDescriptor fd, boolean metaData) throws IOException {
93         // Android-added: BlockGuard support.
94         BlockGuard.getThreadPolicy().onWriteToDisk();
95         return force0(fd, metaData);
96     }
97 
truncate(FileDescriptor fd, long size)98     int truncate(FileDescriptor fd, long size) throws IOException {
99         // Android-added: BlockGuard support.
100         BlockGuard.getThreadPolicy().onWriteToDisk();
101         return truncate0(fd, size);
102     }
103 
size(FileDescriptor fd)104     long size(FileDescriptor fd) throws IOException {
105         // Android-added: BlockGuard support.
106         BlockGuard.getThreadPolicy().onReadFromDisk();
107         return size0(fd);
108     }
109 
lock(FileDescriptor fd, boolean blocking, long pos, long size, boolean shared)110     int lock(FileDescriptor fd, boolean blocking, long pos, long size,
111              boolean shared) throws IOException
112     {
113         // Android-added: BlockGuard support.
114         BlockGuard.getThreadPolicy().onWriteToDisk();
115         return lock0(fd, blocking, pos, size, shared);
116     }
117 
release(FileDescriptor fd, long pos, long size)118     void release(FileDescriptor fd, long pos, long size) throws IOException {
119         // Android-added: BlockGuard support.
120         BlockGuard.getThreadPolicy().onWriteToDisk();
121         release0(fd, pos, size);
122     }
123 
close(FileDescriptor fd)124     void close(FileDescriptor fd) throws IOException {
125         close0(fd);
126     }
127 
preClose(FileDescriptor fd)128     void preClose(FileDescriptor fd) throws IOException {
129         preClose0(fd);
130     }
131 
duplicateForMapping(FileDescriptor fd)132     FileDescriptor duplicateForMapping(FileDescriptor fd) {
133         // file descriptor not required for mapping operations; okay
134         // to return invalid file descriptor.
135         return new FileDescriptor();
136     }
137 
canTransferToDirectly(java.nio.channels.SelectableChannel sc)138     boolean canTransferToDirectly(java.nio.channels.SelectableChannel sc) {
139         return true;
140     }
141 
transferToDirectlyNeedsPositionLock()142     boolean transferToDirectlyNeedsPositionLock() {
143         return false;
144     }
145 
146     // -- Native methods --
147 
read0(FileDescriptor fd, long address, int len)148     static native int read0(FileDescriptor fd, long address, int len)
149         throws IOException;
150 
pread0(FileDescriptor fd, long address, int len, long position)151     static native int pread0(FileDescriptor fd, long address, int len,
152                              long position) throws IOException;
153 
readv0(FileDescriptor fd, long address, int len)154     static native long readv0(FileDescriptor fd, long address, int len)
155         throws IOException;
156 
write0(FileDescriptor fd, long address, int len)157     static native int write0(FileDescriptor fd, long address, int len)
158         throws IOException;
159 
pwrite0(FileDescriptor fd, long address, int len, long position)160     static native int pwrite0(FileDescriptor fd, long address, int len,
161                              long position) throws IOException;
162 
writev0(FileDescriptor fd, long address, int len)163     static native long writev0(FileDescriptor fd, long address, int len)
164         throws IOException;
165 
force0(FileDescriptor fd, boolean metaData)166     static native int force0(FileDescriptor fd, boolean metaData)
167         throws IOException;
168 
truncate0(FileDescriptor fd, long size)169     static native int truncate0(FileDescriptor fd, long size)
170         throws IOException;
171 
size0(FileDescriptor fd)172     static native long size0(FileDescriptor fd) throws IOException;
173 
lock0(FileDescriptor fd, boolean blocking, long pos, long size, boolean shared)174     static native int lock0(FileDescriptor fd, boolean blocking, long pos,
175                             long size, boolean shared) throws IOException;
176 
release0(FileDescriptor fd, long pos, long size)177     static native void release0(FileDescriptor fd, long pos, long size)
178         throws IOException;
179 
close0(FileDescriptor fd)180     static native void close0(FileDescriptor fd) throws IOException;
181 
preClose0(FileDescriptor fd)182     static native void preClose0(FileDescriptor fd) throws IOException;
183 
closeIntFD(int fd)184     static native void closeIntFD(int fd) throws IOException;
185 
186     // Android-removed: Code to load native libraries, doesn't make sense on Android.
187     // static native void init();
188 
189 }
190