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/*
 * Copyright (C) 2012 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.google.common.cache;

import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Supplier;
import java.util.concurrent.atomic.AtomicLong;

/**
 *  Source of {@link LongAddable} objects that deals with GWT, Unsafe, and all
 *  that.
 *
 *  @author Louis Wasserman
 *
 * @deprecated The Google Guava Core Libraries are deprecated and will not be part of the AEM SDK after April 2023
 */
@GwtCompatible(emulated = true)
@Deprecated(since = "2022-12-01")
final class LongAddables {

    private static final Supplier SUPPLIER;

    static {
        Supplier supplier;
        try {
            new LongAdder();
            supplier = new Supplier() {

                @Override
                public LongAddable get() {
                    return new LongAdder();
                }
            };
        } catch (Throwable t) {
            // we really want to catch *everything*
            supplier = new Supplier() {

                @Override
                public LongAddable get() {
                    return new PureJavaLongAddable();
                }
            };
        }
        SUPPLIER = supplier;
    }

    public static LongAddable create() {
        return SUPPLIER.get();
    }

    // @deprecated The Google Guava Core Libraries are deprecated and will not be part of the AEM SDK after April 2023
    @Deprecated(since = "2022-12-01")
    private static final class PureJavaLongAddable extends AtomicLong implements LongAddable {

        @Override
        public void increment() {
            getAndIncrement();
        }

        @Override
        public void add(long x) {
            getAndAdd(x);
        }

        @Override
        public long sum() {
            return get();
        }
    }
}