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.walk;
 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 
 32 @Fork(value = 3, jvmArgsAppend = {"--enable-preview", "--add-exports", "java.base/jdk.internal.value=ALL-UNNAMED"})
 33 public class Value032NullFreeNonAtomic extends WalkBase {
 34 
 35     public interface InterfaceInt {
 36         public int value();
 37     }
 38 
 39     @LooselyConsistentValue
 40     public static value class ValueInt implements InterfaceInt {
 41 
 42         public final int value;
 43 
 44         public ValueInt(int value) {
 45             this.value = value;
 46         }
 47 
 48         public int value() {
 49             return value;
 50         }
 51 
 52     }
 53 
 54     public static class ValState extends SizeState {
 55         public ValueInt[] arr;
 56 
 57         @Setup
 58         public void setup() {
 59             arr = (ValueInt[]) ValueClass.newNullRestrictedNonAtomicArray(ValueInt.class, size, new ValueInt(0));
 60             int[] a = makeRandomRing(arr.length);
 61             for (int i = 0; i < a.length; i++) {
 62                 arr[i] = new ValueInt(a[i]);
 63             }
 64         }
 65     }
 66 
 67     public static class IntState extends SizeState {
 68         public InterfaceInt[] arr;
 69 
 70         @Setup
 71         public void setup() {
 72             arr = new InterfaceInt[size];
 73             int[] a = makeRandomRing(arr.length);
 74             for (int i = 0; i < a.length; i++) {
 75                 arr[i] = new ValueInt(a[i]);
 76             }
 77         }
 78     }
 79 
 80     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 81     private static int walk_val(ValueInt[] values) {
 82         int steps = 0;
 83         for (int i = values[0].value(); i != 0; i = values[i].value()) steps++;
 84         return steps;
 85     }
 86 
 87     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 88     private static int walk_int(InterfaceInt[] values) {
 89         int steps = 0;
 90         for (int i = values[0].value(); i != 0; i = values[i].value()) steps++;
 91         return steps;
 92     }
 93 
 94     @Benchmark
 95     public int walk_val_as_val(ValState st) {
 96         return walk_val(st.arr);
 97     }
 98 
 99     @Benchmark
100     public int walk_int_as_int(IntState st) {
101         return walk_int(st.arr);
102     }
103 
104 }