directmemory-cache/src/main/java/org/apache/directmemory/memory/allocator/UnsafeUtils.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.directmemory.memory.allocator;

import java.lang.reflect.Field;

@SuppressWarnings( "restriction" )
public final class UnsafeUtils
{

    private static final sun.misc.Unsafe UNSAFE;

    static
    {
        sun.misc.Unsafe unsafe;
        try
        {
            Field unsafeField = sun.misc.Unsafe.class.getDeclaredField( "theUnsafe" );
            unsafeField.setAccessible( true );
            unsafe = (sun.misc.Unsafe) unsafeField.get( null );
        }
        catch ( Exception e )
        {
            unsafe = null;
        }

        UNSAFE = unsafe;
    }

    private UnsafeUtils()
    {
    }

    public static sun.misc.Unsafe getUnsafe()
    {
        return UNSAFE;
    }
}