src/main/java/org/apache/datasketches/memory/JDK7Compatible.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.datasketches.memory;

final class JDK7Compatible {

  private JDK7Compatible() {}

  static long getAndAddLong(final Object obj, final long address, final long increment) {
    long retVal;
    do {
      retVal = UnsafeUtil.unsafe.getLongVolatile(obj, address);
    } while (!UnsafeUtil.unsafe.compareAndSwapLong(obj, address, retVal, retVal + increment));

    return retVal;
  }

  static long getAndSetLong(final Object obj, final long address, final long value) {
    long retVal;
    do {
      retVal = UnsafeUtil.unsafe.getLongVolatile(obj, address);
    } while (!UnsafeUtil.unsafe.compareAndSwapLong(obj, address, retVal, value));

    return retVal;
  }
}