UnsafeAccessor.java

/*
 * Copyright (C) 2012 Facebook, Inc.
 *
 * 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.facebook.memory;

import sun.misc.Unsafe;

import java.lang.reflect.Field;

public class UnsafeAccessor {
  private static Unsafe UNSAFE = null;

  static {
    try {
      Field field = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");
      field.setAccessible(true);
      UnsafeAccessor.UNSAFE = (sun.misc.Unsafe) field.get(null);
    } catch (Exception e) {
      throw new AssertionError(e);
    }
  }

  public static Unsafe get() {
    return UnsafeAccessor.UNSAFE;
  }
}