content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * 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
   *
   * https://opensource.org/licenses/Apache-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.tencent.angel.utils;
  
  import java.util.concurrent.atomic.AtomicInteger;
  
  /**
   * A simple atomic counter.
   */
  public class PositiveAtomicCounter {
    private final AtomicInteger atom;
    private static final int mask = 0x7FFFFFFF;
  
    public PositiveAtomicCounter() {
      atom = new AtomicInteger(0);
    }
  
    public final int incrementAndGet() {
      final int rt = atom.incrementAndGet();
      return rt & mask;
    }
  
    public int intValue() {
      return atom.intValue();
    }
  }