FinMemoryObject.java

/*
 * Copyright (c) 2005, 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;

import java.io.PrintStream;

/**
 * An object that occupies approximately given number of bytes in memory
 * and also records number of allocated and finalized instances.
 */
public class FinMemoryObject extends FinMemoryObject1 {
        private static int finalizedCount;

        public FinMemoryObject(int size) {
                super(size);
        }

        protected void finalize() {
                synchronized (FinMemoryObject.class) {
                        ++finalizedCount;
                }
        }

        /**
         * Returns the number of finalized FinMemoryObjects.
         */
        public static int getFinalizedCount() {
                return finalizedCount;
        }

        /**
         * Returns the number of live FinMemoryObjects (allocated but not finalized).
         */
        public static int getLiveCount() {
                return allocatedCount - finalizedCount;
        }

        public static void dumpStatistics(PrintStream out) {
                Algorithms.tryToPrintln(out, "Object count: " + getLiveCount());
        }

        public static void dumpStatistics() {
                dumpStatistics(System.out);
        }

        public static boolean isAllFinalized() {
                return getLiveCount() == 0;
        }
}