Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright Terracotta, 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.
 */

import sun.misc.Unsafe;
import java.lang.reflect.Field;
import java.security.PrivilegedExceptionAction;

public class Main {
    static Unsafe getSMU() {
        try {
            return sun.misc.Unsafe.getUnsafe();
        } catch (SecurityException tryReflectionInstead) {
            // ignore
        }
        try {
            return java.security.AccessController.doPrivileged((PrivilegedExceptionAction<Unsafe>) () -> {
                Class<sun.misc.Unsafe> k = sun.misc.Unsafe.class;
                for (Field f : k.getDeclaredFields()) {
                    f.setAccessible(true);
                    Object x = f.get(null);
                    if (k.isInstance(x))
                        return k.cast(x);
                }
                throw new NoSuchFieldError("the Unsafe");
            });
        } catch (java.security.PrivilegedActionException e) {
            throw new RuntimeException("Could not initialize intrinsics", e.getCause());
        }
    }
}