/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
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 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
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 */
package com.sun.appserv.management.util.misc;


/**
    Central registry of timing values. Not intended for threaded use.
 */
public final class TimingDelta
{
    private long  mLastNanos;
    
        public
    TimingDelta()
    {
        mLastNanos    = System.nanoTime();
    }
    
    /**
        @deprecated use elapsedNanos
     */
        public long
    elapsed()
    {
       return elapsedNanos();
    }
    
        public long
    elapsedNanos()
    {
        final long now = System.nanoTime();
        final long elapsed = now - mLastNanos;
        mLastNanos  = now;
        return elapsed;
    }
    
        public long
    elapsedMicros()
    {
        return elapsed() / 1000;
    }
    
        public long
    elapsedMillis()
    {
        return elapsed() / (1000 * 1000);
    }
}