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/*
 * Copyright 2006-2021 the original author or 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 org.springframework.objenesis.instantiator.util;

import java.lang.reflect.Field;

import org.springframework.objenesis.ObjenesisException;

import sun.misc.Unsafe;

/**
 * Helper class basically allowing to get access to {@code sun.misc.Unsafe}
 *
 * @author Henri Tremblay
 */
public final class UnsafeUtils {

   private static final Unsafe unsafe;

   static {
      Field f;
      try {
         f = Unsafe.class.getDeclaredField("theUnsafe");
      } catch (NoSuchFieldException e) {
         throw new ObjenesisException(e);
      }
      f.setAccessible(true);
      try {
         unsafe = (Unsafe) f.get(null);
      } catch (IllegalAccessException e) {
         throw new ObjenesisException(e);
      }
   }

   private UnsafeUtils() {}

   public static Unsafe getUnsafe() {
      return unsafe;
   }
}