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
21  * questions.
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 ValueOopNullFreeNonAtomic extends ReadBase {
35 
36     public static class IdentityInt {
37         public final int value;
38         public IdentityInt(int value) {
39             this.value = value;
40         }
41         public int value() {
42             return value;
43         }
44     }
45 
46     public interface InterfaceOop {
47         public IdentityInt value();
48     }
49 
50     @LooselyConsistentValue
51     public static value class ValueRef implements InterfaceOop {
52 
53         public final IdentityInt value;
54 
55         public ValueRef(IdentityInt value) {
56             this.value = value;
57         }
58 
59         public IdentityInt value() {
60             return value;
61         }
62 
63     }
64 
65     public static class ValState extends SizeState {
66         public ValueRef[] arr;
67 
68         @Setup
69         public void setup() {
70             arr = (ValueRef[]) ValueClass.newNullRestrictedAtomicArray(ValueRef.class, size, new ValueRef(new IdentityInt(0)));
71             for (int i = 0; i < size; i++) {
72                 arr[i] = new ValueRef(new IdentityInt(i));
73             }
74         }
75     }
76 
77     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
78     public void read_val(ValueRef[] src, Blackhole bh) {
79         for (int i = 0; i < src.length; i++) {
80             bh.consume(src[i]);
81         }
82     }
83 
84     @Benchmark
85     public void read(ValState st1, Blackhole bh) {
86         read_val(st1.arr, bh);
87     }
88 
89 }