1 /*
2 * Copyright (c) 2019, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 import jdk.incubator.foreign.MemoryHandles;
26 import jdk.incubator.foreign.MemoryLayout;
27 import jdk.incubator.foreign.MemoryLayouts;
28 import jdk.incubator.foreign.MemorySegment;
29
30 import java.lang.invoke.VarHandle;
31
32 import org.testng.annotations.*;
33 import static org.testng.Assert.*;
34
35 /*
36 * @test
37 * @run testng/othervm -Xverify:all TestSlices
38 */
39 public class TestSlices {
40
41 static MemoryLayout LAYOUT = MemoryLayout.ofSequence(2,
42 MemoryLayout.ofSequence(5, MemoryLayouts.JAVA_INT));
43
44 static VarHandle VH_ALL = LAYOUT.varHandle(int.class,
45 MemoryLayout.PathElement.sequenceElement(), MemoryLayout.PathElement.sequenceElement());
46
47 static VarHandle VH_INT = MemoryLayouts.JAVA_INT.varHandle(int.class);
48
49 @Test(dataProvider = "slices")
50 public void testSlices(VarHandle handle, int lo, int hi, int[] values) {
51 try (MemorySegment segment = MemorySegment.allocateNative(LAYOUT)) {
52 //init
53 for (long i = 0 ; i < 2 ; i++) {
54 for (long j = 0 ; j < 5 ; j++) {
55 VH_ALL.set(segment.baseAddress(), i, j, (int)j + 1 + ((int)i * 5));
56 }
57 }
58
59 checkSlice(segment, handle, lo, hi, values);
60 }
61 }
62
63 static void checkSlice(MemorySegment segment, VarHandle handle, long i_max, long j_max, int... values) {
64 int index = 0;
65 for (long i = 0 ; i < i_max ; i++) {
66 for (long j = 0 ; j < j_max ; j++) {
67 int x = (int) handle.get(segment.baseAddress(), i, j);
68 assertEquals(x, values[index++]);
69 }
70 }
71 assertEquals(index, values.length);
72 }
73
74 @DataProvider(name = "slices")
75 static Object[][] slices() {
76 return new Object[][] {
77 // x
78 { VH_ALL, 2, 5, new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 } },
79 // x[0::2]
80 { LAYOUT.varHandle(int.class, MemoryLayout.PathElement.sequenceElement(),
81 MemoryLayout.PathElement.sequenceElement(0, 2)), 2, 3, new int[] { 1, 3, 5, 6, 8, 10 } },
82 { MemoryHandles.withStride(MemoryHandles.withStride(VH_INT, 8), 20), 2, 3, new int[] { 1, 3, 5, 6, 8, 10 } },
83 // x[1::2]
84 { LAYOUT.varHandle(int.class, MemoryLayout.PathElement.sequenceElement(),
85 MemoryLayout.PathElement.sequenceElement(1, 2)), 2, 2, new int[] { 2, 4, 7, 9 } },
86 { MemoryHandles.withOffset(MemoryHandles.withStride(MemoryHandles.withStride(VH_INT, 8), 20), 4), 2, 2, new int[] { 2, 4, 7, 9 } },
87 // x[4::-2]
88 { LAYOUT.varHandle(int.class, MemoryLayout.PathElement.sequenceElement(),
89 MemoryLayout.PathElement.sequenceElement(4, -2)), 2, 3, new int[] { 5, 3, 1, 10, 8, 6 } },
90 { MemoryHandles.withOffset(MemoryHandles.withStride(MemoryHandles.withStride(VH_INT, -8), 20), 16), 2, 3, new int[] { 5, 3, 1, 10, 8, 6 } },
91 // x[3::-2]
92 { LAYOUT.varHandle(int.class, MemoryLayout.PathElement.sequenceElement(),
93 MemoryLayout.PathElement.sequenceElement(3, -2)), 2, 2, new int[] { 4, 2, 9, 7 } },
94 { MemoryHandles.withOffset(MemoryHandles.withStride(MemoryHandles.withStride(VH_INT, -8), 20), 12), 2, 2, new int[] { 4, 2, 9, 7 } },
95 };
96 }
97 }