1 /*
 2  * Copyright (c) 2025, 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
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22  */
23 package org.openjdk.bench.valhalla.array.read;
24 
25 import jdk.internal.value.ValueClass;
26 import jdk.internal.vm.annotation.LooselyConsistentValue;
27 import org.openjdk.jmh.annotations.Benchmark;
28 import org.openjdk.jmh.annotations.CompilerControl;
29 import org.openjdk.jmh.annotations.Fork;
30 import org.openjdk.jmh.annotations.Setup;
31 import org.openjdk.jmh.infra.Blackhole;
32 
33 @Fork(value = 3, jvmArgsAppend = {"--enable-preview", "--add-exports", "java.base/jdk.internal.value=ALL-UNNAMED"})
34 public class Value032NullFreeNonAtomic extends ReadBase {
35 
36     public interface InterfaceInt {
37         public int value();
38     }
39 
40     @LooselyConsistentValue
41     public static value class ValueInt implements InterfaceInt {
42 
43         public final int value;
44 
45         public ValueInt(int value) {
46             this.value = value;
47         }
48 
49         public int value() {
50             return value;
51         }
52 
53     }
54 
55     public static class ValState extends SizeState {
56         public ValueInt[] arr;
57 
58         @Setup
59         public void setup() {
60             arr = (ValueInt[]) ValueClass.newNullRestrictedNonAtomicArray(ValueInt.class, size, new ValueInt(0));
61             for (int i = 0; i < size; i++) {
62                 arr[i] = new ValueInt(i);
63             }
64         }
65     }
66 
67     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
68     public void read_val(ValueInt[] src, Blackhole bh) {
69         for (int i = 0; i < src.length; i++) {
70             bh.consume(src[i]);
71         }
72     }
73 
74     @Benchmark
75     public void read(ValState st1, Blackhole bh) {
76         read_val(st1.arr, bh);
77     }
78 
79 }