1 /*
2 * Copyright (c) 2000, 2018, 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(boolean append) {
39 /* append is ignored */
40 }
41
42 FileDispatcherImpl() {
43 }
44
45 int read(FileDescriptor fd, long address, int len) throws IOException {
46 return read0(fd, address, len);
47 }
48
49 int pread(FileDescriptor fd, long address, int len, long position)
50 throws IOException
51 {
52 return pread0(fd, address, len, position);
53 }
54
55 long readv(FileDescriptor fd, long address, int len) throws IOException {
56 return readv0(fd, address, len);
57 }
58
59 int write(FileDescriptor fd, long address, int len) throws IOException {
60 return write0(fd, address, len);
61 }
62
63 int pwrite(FileDescriptor fd, long address, int len, long position)
64 throws IOException
65 {
66 return pwrite0(fd, address, len, position);
67 }
68
69 long writev(FileDescriptor fd, long address, int len)
70 throws IOException
71 {
72 return writev0(fd, address, len);
73 }
74
75 int force(FileDescriptor fd, boolean metaData) throws IOException {
76 return force0(fd, metaData);
77 }
78
79 int truncate(FileDescriptor fd, long size) throws IOException {
80 return truncate0(fd, size);
81 }
82
83 int allocate(FileDescriptor fd, long size) throws IOException {
84 return allocate0(fd, size);
85 }
86
87 long size(FileDescriptor fd) throws IOException {
88 return size0(fd);
89 }
90
91 int lock(FileDescriptor fd, boolean blocking, long pos, long size,
92 boolean shared) throws IOException
93 {
94 return lock0(fd, blocking, pos, size, shared);
95 }
96
97 void release(FileDescriptor fd, long pos, long size) throws IOException {
98 release0(fd, pos, size);
99 }
100
101 void close(FileDescriptor fd) throws IOException {
102 close0(fd);
103 }
104
105 void preClose(FileDescriptor fd) throws IOException {
106 preClose0(fd);
107 }
108
109 FileDescriptor duplicateForMapping(FileDescriptor fd) {
110 // file descriptor not required for mapping operations; okay
111 // to return invalid file descriptor.
112 return new FileDescriptor();
113 }
114
115 boolean canTransferToDirectly(java.nio.channels.SelectableChannel sc) {
116 return true;
117 }
118
119 boolean transferToDirectlyNeedsPositionLock() {
120 return false;
121 }
122
123 // -- Native methods --
124
125 static native int read0(FileDescriptor fd, long address, int len)
126 throws IOException;
127
128 static native int pread0(FileDescriptor fd, long address, int len,
129 long position) throws IOException;
130
131 static native long readv0(FileDescriptor fd, long address, int len)
132 throws IOException;
133
134 static native int write0(FileDescriptor fd, long address, int len)
135 throws IOException;
136
137 static native int pwrite0(FileDescriptor fd, long address, int len,
138 long position) throws IOException;
139
140 static native long writev0(FileDescriptor fd, long address, int len)
141 throws IOException;
142
143 static native int force0(FileDescriptor fd, boolean metaData)
144 throws IOException;
145
146 static native int truncate0(FileDescriptor fd, long size)
147 throws IOException;
148
149 static native int allocate0(FileDescriptor fd, long size)
150 throws IOException;
151
152 static native long size0(FileDescriptor fd) throws IOException;
153
154 static native int lock0(FileDescriptor fd, boolean blocking, long pos,
155 long size, boolean shared) throws IOException;
156
157 static native void release0(FileDescriptor fd, long pos, long size)
158 throws IOException;
159
160 static native void close0(FileDescriptor fd) throws IOException;
161
162 static native void preClose0(FileDescriptor fd) throws IOException;
163
164 static native void closeIntFD(int fd) throws IOException;
165
166 static native void init();
167
168 }