1 /*
   2  * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.management.counter.perf;
  27 
  28 import sun.management.counter.*;
  29 import java.nio.LongBuffer;
  30 import java.nio.ReadOnlyBufferException;
  31 
  32 public class PerfLongCounter extends AbstractCounter
  33        implements LongCounter {
  34 
  35     LongBuffer lb;
  36 
  37     // package private
  38     PerfLongCounter(String name, Units u, Variability v, int flags,
  39                     LongBuffer lb) {
  40         super(name, u, v, flags);
  41         this.lb = lb;
  42     }
  43 
  44     public Object getValue() {
  45         return new Long(lb.get(0));
  46     }
  47 
  48     /**
  49      * Get the value of this Long performance counter
  50      */
  51     public long longValue() {
  52         return lb.get(0);
  53     }
  54 
  55     /**
  56      * Serialize as a snapshot object.
  57      */
  58     protected Object writeReplace() throws java.io.ObjectStreamException {
  59         return new LongCounterSnapshot(getName(),
  60                                        getUnits(),
  61                                        getVariability(),
  62                                        getFlags(),
  63                                        longValue());
  64     }
  65 
  66     private static final long serialVersionUID = 857711729279242948L;
  67 }