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.ml.math2.utils;
  
  import java.util.concurrent.ForkJoinPool;
  
  public class ForkJoinUtils {
  
    private static ForkJoinPool pool;
  
    public static ForkJoinPool getPool() {
      if (null == pool) {
        pool = new ForkJoinPool();
      }
  
      return pool;
    }
  
    public static int getNCores() {
      String ncoresStr = System.getenv("NUMBER_OF_CPU_CORES");
      if (ncoresStr == null) {
        return Runtime.getRuntime().availableProcessors();
      } else {
        return Integer.parseInt(ncoresStr);
      }
    }
  }