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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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 *
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package org.openjdk.bench.valhalla.array.walk;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.CompilerControl;
import org.openjdk.jmh.annotations.Setup;

public class Identity extends WalkBase {

    public interface InterfaceInt {
        public int value();
    }

    public static class IdentityInt implements InterfaceInt {

        public final int value;

        public IdentityInt(int value) {
            this.value = value;
        }

        public int value() {
            return value;
        }

    }


    public static class RefState extends SizeState {
        public IdentityInt[] arr;

        @Setup
        public void setup() {
            arr = new IdentityInt[size];
            int[] a = makeRandomRing(arr.length);
            for (int i = 0; i < a.length; i++) {
                arr[i] = new IdentityInt(a[i]);
            }
        }
    }

    public static class IntState extends SizeState {
        public InterfaceInt[] arr;

        @Setup
        public void setup() {
            arr = new InterfaceInt[size];
            int[] a = makeRandomRing(arr.length);
            for (int i = 0; i < a.length; i++) {
                arr[i] = new IdentityInt(a[i]);
            }
        }
    }

    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    private static int walk_ref(IdentityInt[] values) {
        int steps = 0;
        for (int i = values[0].value(); i != 0; i = values[i].value()) steps++;
        return steps;
    }

    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    private static int walk_int(InterfaceInt[] values) {
        int steps = 0;
        for (int i = values[0].value(); i != 0; i = values[i].value()) steps++;
        return steps;
    }

    @Benchmark
    public int walk_ref_as_ref(RefState st) {
        return walk_ref(st.arr);
    }

    @Benchmark
    public int walk_int_as_int(IntState st) {
        return walk_int(st.arr);
    }

}
