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 static {
34 IOUtil.load();
35 init();
36 }
37
38 FileDispatcherImpl() {
39 }
40
41 int read(FileDescriptor fd, long address, int len) throws IOException {
42 return read0(fd, address, len);
43 }
44
45 int pread(FileDescriptor fd, long address, int len, long position)
46 throws IOException
47 {
48 return pread0(fd, address, len, position);
49 }
50
51 long readv(FileDescriptor fd, long address, int len) throws IOException {
52 return readv0(fd, address, len);
53 }
54
55 int write(FileDescriptor fd, long address, int len) throws IOException {
56 return write0(fd, address, len);
57 }
58
59 int pwrite(FileDescriptor fd, long address, int len, long position)
60 throws IOException
61 {
62 return pwrite0(fd, address, len, position);
63 }
64
65 long writev(FileDescriptor fd, long address, int len)
66 throws IOException
67 {
68 return writev0(fd, address, len);
69 }
70
71 int force(FileDescriptor fd, boolean metaData) throws IOException {
72 return force0(fd, metaData);
73 }
74
75 int truncate(FileDescriptor fd, long size) throws IOException {
76 return truncate0(fd, size);
77 }
78
79 long size(FileDescriptor fd) throws IOException {
80 return size0(fd);
81 }
82
83 int lock(FileDescriptor fd, boolean blocking, long pos, long size,
84 boolean shared) throws IOException
85 {
86 return lock0(fd, blocking, pos, size, shared);
87 }
88
89 void release(FileDescriptor fd, long pos, long size) throws IOException {
90 release0(fd, pos, size);
91 }
92
93 void close(FileDescriptor fd) throws IOException {
94 close0(fd);
95 }
96
97 void preClose(FileDescriptor fd) throws IOException {
98 preClose0(fd);
99 }
100
101 FileDescriptor duplicateForMapping(FileDescriptor fd) {
102 // file descriptor not required for mapping operations; okay
103 // to return invalid file descriptor.
104 return new FileDescriptor();
105 }
106
107 boolean canTransferToDirectly(java.nio.channels.SelectableChannel sc) {
108 return true;
109 }
110
111 boolean transferToDirectlyNeedsPositionLock() {
112 return false;
113 }
114
115 // -- Native methods --
116
117 static native int read0(FileDescriptor fd, long address, int len)
118 throws IOException;
119
120 static native int pread0(FileDescriptor fd, long address, int len,
121 long position) throws IOException;
122
123 static native long readv0(FileDescriptor fd, long address, int len)
124 throws IOException;
125
126 static native int write0(FileDescriptor fd, long address, int len)
127 throws IOException;
128
129 static native int pwrite0(FileDescriptor fd, long address, int len,
130 long position) throws IOException;
131
132 static native long writev0(FileDescriptor fd, long address, int len)
133 throws IOException;
134
135 static native int force0(FileDescriptor fd, boolean metaData)
136 throws IOException;
137
138 static native int truncate0(FileDescriptor fd, long size)
139 throws IOException;
140
141 static native long size0(FileDescriptor fd) throws IOException;
142
143 static native int lock0(FileDescriptor fd, boolean blocking, long pos,
144 long size, boolean shared) throws IOException;
145
146 static native void release0(FileDescriptor fd, long pos, long size)
147 throws IOException;
148
149 static native void close0(FileDescriptor fd) throws IOException;
150
151 static native void preClose0(FileDescriptor fd) throws IOException;
152
153 static native void closeIntFD(int fd) throws IOException;
154
155 static native void init();
156
157 }