1 /*
2 * Copyright (c) 2000, 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 java.io.FileDescriptor;
29 import java.io.IOException;
30
31 class FileDispatcherImpl extends FileDispatcher {
32
33 private int pageSize = -1;
34
35 static {
36 IOUtil.load();
37 init();
38 }
39
40 FileDispatcherImpl() {
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, long position)
48 throws IOException
49 {
50 return pread0(fd, address, len, position);
51 }
52
53 long readv(FileDescriptor fd, long address, int len) throws IOException {
54 return readv0(fd, address, len);
55 }
56
57 int readDirect(FileDescriptor fd, long address, int len) throws IOException {
58 return readDirect0(fd, address, len);
59 }
60
61 int preadDirect(FileDescriptor fd, long address, int len, long position)
62 throws IOException
63 {
64 return preadDirect0(fd, address, len, position);
65 }
66
67 long readvDirect(FileDescriptor fd, long address, int len) throws IOException {
68 return readvDirect0(fd, address, len);
69 }
70
71 int write(FileDescriptor fd, long address, int len) throws IOException {
72 return write0(fd, address, len);
73 }
74
75 int pwrite(FileDescriptor fd, long address, int len, long position)
76 throws IOException
77 {
78 return pwrite0(fd, address, len, position);
79 }
80
81 long writev(FileDescriptor fd, long address, int len)
82 throws IOException
83 {
84 return writev0(fd, address, len);
85 }
86
87 int writeDirect(FileDescriptor fd, long address, int len) throws IOException {
88 return writeDirect0(fd, address, len);
89 }
90
91 int pwriteDirect(FileDescriptor fd, long address, int len, long position)
92 throws IOException
93 {
94 return pwriteDirect0(fd, address, len, position);
95 }
96
97 long writevDirect(FileDescriptor fd, long address, int len)
98 throws IOException
99 {
100 return writevDirect0(fd, address, len);
101 }
102
103 int force(FileDescriptor fd, boolean metaData) throws IOException {
104 return force0(fd, metaData);
105 }
106
107 int truncate(FileDescriptor fd, long size) throws IOException {
108 return truncate0(fd, size);
109 }
110
111 long size(FileDescriptor fd) throws IOException {
112 return size0(fd);
113 }
114
115 int lock(FileDescriptor fd, boolean blocking, long pos, long size,
116 boolean shared) throws IOException
117 {
118 return lock0(fd, blocking, pos, size, shared);
119 }
120
121 void release(FileDescriptor fd, long pos, long size) throws IOException {
122 release0(fd, pos, size);
123 }
124
125 void close(FileDescriptor fd) throws IOException {
126 close0(fd);
127 }
128
129 void preClose(FileDescriptor fd) throws IOException {
130 preClose0(fd);
131 }
132
133 FileDescriptor duplicateForMapping(FileDescriptor fd) {
134 // file descriptor not required for mapping operations; okay
135 // to return invalid file descriptor.
136 return new FileDescriptor();
137 }
138
139 boolean canTransferToDirectly(java.nio.channels.SelectableChannel sc) {
140 return true;
141 }
142
143 boolean transferToDirectlyNeedsPositionLock() {
144 return false;
145 }
146
147 // -- Native methods --
148
149 static native int read0(FileDescriptor fd, long address, int len)
150 throws IOException;
151
152 static native int pread0(FileDescriptor fd, long address, int len,
153 long position) throws IOException;
154
155 static native long readv0(FileDescriptor fd, long address, int len)
156 throws IOException;
157
158 static native int readDirect0(FileDescriptor fd, long address, int len)
159 throws IOException;
160
161 static native int preadDirect0(FileDescriptor fd, long address, int len,
162 long position) throws IOException;
163
164 static native long readvDirect0(FileDescriptor fd, long address, int len)
165 throws IOException;
166
167 static native int write0(FileDescriptor fd, long address, int len)
168 throws IOException;
169
170 static native int pwrite0(FileDescriptor fd, long address, int len,
171 long position) throws IOException;
172
173 static native long writev0(FileDescriptor fd, long address, int len)
174 throws IOException;
175
176 static native int writeDirect0(FileDescriptor fd, long address, int len)
177 throws IOException;
178
179 static native int pwriteDirect0(FileDescriptor fd, long address, int len,
180 long position) throws IOException;
181
182 static native long writevDirect0(FileDescriptor fd, long address, int len)
183 throws IOException;
184
185 static native int force0(FileDescriptor fd, boolean metaData)
186 throws IOException;
187
188 static native int truncate0(FileDescriptor fd, long size)
189 throws IOException;
190
191 static native long size0(FileDescriptor fd) throws IOException;
192
193 static native int lock0(FileDescriptor fd, boolean blocking, long pos,
194 long size, boolean shared) throws IOException;
195
196 static native void release0(FileDescriptor fd, long pos, long size)
197 throws IOException;
198
199 static native void close0(FileDescriptor fd) throws IOException;
200
201 static native void preClose0(FileDescriptor fd) throws IOException;
202
203 static native void closeIntFD(int fd) throws IOException;
204
205 static native void init();
206 }