ByteArrayCriticalLocker.java

/*
 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package nsk.share.gc.lock.jni;

import nsk.share.gc.lock.CriticalSectionObjectLocker;
import nsk.share.TestFailure;

public class ByteArrayCriticalLocker extends CriticalSectionObjectLocker<byte[]> {
        private native byte criticalNative(long enterTime, long sleepTime);

        static {
                System.loadLibrary("ByteArrayCriticalLocker");
        }

        public ByteArrayCriticalLocker(byte[] obj) {
                super(obj);
        }
        protected void criticalSection(long enterTime, long sleepTime) {
                byte javaHash = hashValue(obj);
                byte nativeHash = criticalNative(enterTime, sleepTime);
                if (nativeHash != 0 && nativeHash != javaHash)
                        throw new TestFailure("Native hash: " + nativeHash + " != Java hash: " + javaHash);
        }


        private byte hashValue(byte[] obj) {
                byte hash = 0;
                for (int i = 0; i < obj.length; ++i)
                        hash ^= obj[i];
                return hash;
        }
}