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
|
/*
* Copyright (c) 2021, 2023, 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
* @enablePreview
* @run testng/othervm TestSegmentOverlap
*/
import java.io.File;
import java.io.IOException;
import java.lang.foreign.Arena;
import java.nio.channels.FileChannel;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.util.List;
import java.util.function.Supplier;
import java.lang.foreign.MemorySegment;
import org.testng.annotations.Test;
import org.testng.annotations.DataProvider;
import static java.lang.System.out;
import static org.testng.Assert.*;
public class TestSegmentOverlap {
static Path tempPath;
static {
try {
File file = File.createTempFile("buffer", "txt");
file.deleteOnExit();
tempPath = file.toPath();
Files.write(file.toPath(), new byte[16], StandardOpenOption.WRITE);
} catch (IOException ex) {
throw new ExceptionInInitializerError(ex);
}
}
@DataProvider(name = "segmentFactories")
public Object[][] segmentFactories() {
List<Supplier<MemorySegment>> l = List.of(
() -> Arena.ofAuto().allocate(16, 1),
() -> {
try (FileChannel fileChannel = FileChannel.open(tempPath, StandardOpenOption.READ, StandardOpenOption.WRITE)) {
return fileChannel.map(FileChannel.MapMode.READ_WRITE, 0L, 16L, Arena.ofAuto());
} catch (IOException e) {
throw new RuntimeException(e);
}
},
() -> MemorySegment.ofArray(new byte[] { 0x00, 0x01, 0x02, 0x03 } ),
() -> MemorySegment.ofArray(new char[] {'a', 'b', 'c', 'd' } ),
() -> MemorySegment.ofArray(new double[] { 1d, 2d, 3d, 4d} ),
() -> MemorySegment.ofArray(new float[] { 1.0f, 2.0f, 3.0f, 4.0f } ),
() -> MemorySegment.ofArray(new int[] { 1, 2, 3, 4 }),
() -> MemorySegment.ofArray(new long[] { 1L, 2L, 3L, 4L } ),
() -> MemorySegment.ofArray(new short[] { 1, 2, 3, 4 } )
);
return l.stream().map(s -> new Object[] { s }).toArray(Object[][]::new);
}
@Test(dataProvider="segmentFactories")
public void testBasic(Supplier<MemorySegment> segmentSupplier) {
var s1 = segmentSupplier.get();
var s2 = segmentSupplier.get();
var sOther = s1.isNative() ? OtherSegmentFactory.HEAP.factory.get()
: OtherSegmentFactory.NATIVE.factory.get();
out.format("testBasic s1:%s, s2:%s, sOther:%s\n", s1, s2, sOther);
assertTrue(s1.asOverlappingSlice(s2).isEmpty());
assertTrue(s2.asOverlappingSlice(s1).isEmpty());
assertTrue(s1.asOverlappingSlice(sOther).isEmpty());
}
@Test(dataProvider="segmentFactories")
public void testIdentical(Supplier<MemorySegment> segmentSupplier) {
var s1 = segmentSupplier.get();
var s2 = s1.asReadOnly();
out.format("testIdentical s1:%s, s2:%s\n", s1, s2);
assertEquals(s1.asOverlappingSlice(s2).get().byteSize(), s1.byteSize());
assertEquals(s1.asOverlappingSlice(s2).get().scope(), s1.scope());
assertEquals(s2.asOverlappingSlice(s1).get().byteSize(), s2.byteSize());
assertEquals(s2.asOverlappingSlice(s1).get().scope(), s2.scope());
if (s1.isNative()) {
assertEquals(s1.asOverlappingSlice(s2).get().address(), s1.address());
assertEquals(s2.asOverlappingSlice(s1).get().address(), s2.address());
}
}
@Test(dataProvider="segmentFactories")
public void testSlices(Supplier<MemorySegment> segmentSupplier) {
MemorySegment s1 = segmentSupplier.get();
MemorySegment s2 = segmentSupplier.get();
for (int offset = 0 ; offset < 4 ; offset++) {
MemorySegment slice = s1.asSlice(offset);
out.format("testSlices s1:%s, s2:%s, slice:%s, offset:%d\n", s1, s2, slice, offset);
assertEquals(s1.asOverlappingSlice(slice).get().byteSize(), s1.byteSize() - offset);
assertEquals(s1.asOverlappingSlice(slice).get().scope(), s1.scope());
assertEquals(slice.asOverlappingSlice(s1).get().byteSize(), slice.byteSize());
assertEquals(slice.asOverlappingSlice(s1).get().scope(), slice.scope());
if (s1.isNative()) {
assertEquals(s1.asOverlappingSlice(slice).get().address(), s1.address() + offset);
assertEquals(slice.asOverlappingSlice(s1).get().address(), slice.address());
}
assertTrue(s2.asOverlappingSlice(slice).isEmpty());
}
}
enum OtherSegmentFactory {
NATIVE(() -> Arena.ofAuto().allocate(16, 1)),
HEAP(() -> MemorySegment.ofArray(new byte[]{16}));
final Supplier<MemorySegment> factory;
OtherSegmentFactory(Supplier<MemorySegment> segmentFactory) {
this.factory = segmentFactory;
}
}
}
|
