39 lines
1.2 KiB
Java
39 lines
1.2 KiB
Java
/*
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* Copyright 2014 dorkbox, llc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dorkbox.objectPool;
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import java.lang.reflect.Field;
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import java.security.PrivilegedExceptionAction;
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public class GetUnsafe implements PrivilegedExceptionAction<sun.misc.Unsafe> {
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GetUnsafe() {
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}
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@Override
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public sun.misc.Unsafe run() throws Exception {
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Class<sun.misc.Unsafe> unsafeClass = sun.misc.Unsafe.class;
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Field theUnsafe = unsafeClass.getDeclaredField("theUnsafe");
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theUnsafe.setAccessible(true);
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Object unsafeObject = theUnsafe.get(null);
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if (unsafeClass.isInstance(unsafeObject)) {
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return unsafeClass.cast(unsafeObject);
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}
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throw new NoSuchFieldError("the Unsafe");
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}
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}
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