org.wildfly.common.lock.JDKSpecific Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2018 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.wildfly.common.lock;
import java.lang.reflect.Field;
import java.security.AccessController;
import java.security.PrivilegedAction;
import sun.misc.Unsafe;
/**
*/
final class JDKSpecific {
private JDKSpecific() {}
static final Unsafe unsafe;
static {
unsafe = AccessController.doPrivileged(new PrivilegedAction() {
public Unsafe run() {
try {
final Field field = Unsafe.class.getDeclaredField("theUnsafe");
field.setAccessible(true);
return (Unsafe) field.get(null);
} catch (IllegalAccessException e) {
throw new IllegalAccessError(e.getMessage());
} catch (NoSuchFieldException e) {
throw new NoSuchFieldError(e.getMessage());
}
}
});
}
static void onSpinWait() {
// n/a
}
}