/*
 * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * 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
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */
package org.openjdk.bench.java.lang.ref;

import java.lang.ref.Cleaner;
import java.lang.ref.Cleaner.Cleanable;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole;

@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
@BenchmarkMode(Mode.AverageTime)
@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Fork(value = 3, jvmArgs = {"-Xmx256m", "-Xms256m", "-XX:+AlwaysPreTouch"})
public class CleanerChurn {

    @Param({"128", "256", "512", "1024", "2048"})
    int recipFreq;

    @Benchmark
    public Object test() {
        boolean register = ThreadLocalRandom.current().nextInt(recipFreq) == 0;
        return new Target(register);
    }

    static class Target {
        private static final Cleaner CLEANER = Cleaner.create();
        public Target(boolean register) {
            if (register) {
                CLEANER.register(this, () -> {});
            }
        }
    }

}
