1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8164900
* @summary Test FileChannel write with DirectIO
* @library .. /test/lib
* @build DirectIOTest
* @run main/othervm WriteDirect
*/
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.nio.file.Files;
import java.nio.file.FileStore;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import com.sun.nio.file.ExtendedOpenOption;
public class WriteDirect {
private static int charsPerGroup = -1;
private static int alignment = -1;
private static boolean initTests() throws Exception {
Path p = DirectIOTest.createTempFile();
if (!DirectIOTest.isDirectIOSupportedByFS(p)) {
Files.delete(p);
return false;
}
try {
FileStore fs = Files.getFileStore(p);
alignment = (int)fs.getBlockSize();
charsPerGroup = alignment;
} finally {
Files.delete(p);
}
return true;
}
public static void main(String[] args) throws Exception {
if (initTests()) {
testWithNotAlignedBuffer();
testWithNotAlignedBufferOffset();
testWithArrayOfBuffer();
}
}
static void testWithNotAlignedBuffer() throws Exception {
Path p = DirectIOTest.createTempFile();
try (FileChannel fc = FileChannel.open(p,
StandardOpenOption.WRITE, StandardOpenOption.DELETE_ON_CLOSE,
ExtendedOpenOption.DIRECT)) {
int bufferSize = charsPerGroup - 1;
ByteBuffer src = ByteBuffer.allocate(bufferSize);
try {
fc.write(src);
throw new RuntimeException("Expected exception not thrown");
} catch (IOException e) {
if (!e.getMessage().contains("Number of remaining bytes ("
+ bufferSize + ") is not a multiple of the block size ("
+ alignment + ")"))
throw new Exception("Write failure");
}
}
}
private static void testWithNotAlignedBufferOffset() throws Exception {
int bufferSize = charsPerGroup * 2;
int pos = alignment - 1;
Path p = DirectIOTest.createTempFile();
try (FileChannel fc = FileChannel.open(p,
StandardOpenOption.WRITE, StandardOpenOption.DELETE_ON_CLOSE,
ExtendedOpenOption.DIRECT)) {
ByteBuffer block = ByteBuffer.allocateDirect(bufferSize);
block.position(pos);
block.limit(bufferSize - 1);
try {
fc.write(block);
throw new RuntimeException("Expected exception not thrown");
} catch (IOException e) {
if (!e.getMessage().contains("Current location of the bytebuffer "
+ "(" + pos + ") is not a multiple of the block size ("
+ alignment + ")"))
throw new Exception("Write test failed");
}
}
}
static void testWithArrayOfBuffer() throws Exception {
Path p = DirectIOTest.createTempFile();
ByteBuffer[] srcs = new ByteBuffer[4];
try (FileChannel fc = FileChannel.open(p,
StandardOpenOption.WRITE, ExtendedOpenOption.DIRECT)) {
for (int i = 0; i < 4; i++) {
srcs[i] = ByteBuffer.allocateDirect(charsPerGroup + alignment - 1)
.alignedSlice(alignment);
for (int j = 0; j < charsPerGroup; j++) {
srcs[i].put((byte)i);
}
srcs[i].flip();
}
fc.write(srcs, 1, 2);
}
try (FileChannel fc = FileChannel.open(p,
StandardOpenOption.READ, StandardOpenOption.DELETE_ON_CLOSE)) {
ByteBuffer bb = ByteBuffer.allocateDirect(charsPerGroup * 2);
fc.read(bb);
bb.flip();
for (int k = 0; k < charsPerGroup; k++) {
if (bb.get() != 1)
throw new RuntimeException("Write failure");
}
for (int m = 0; m < charsPerGroup; m++) {
if (bb.get() != 2)
throw new RuntimeException("Write failure");
}
try {
bb.get();
throw new RuntimeException("Write failure");
} catch (BufferUnderflowException bufe) {
// correct result
}
}
}
}
|
