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What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

// $Header: /home/cvs/jakarta-jmeter/src/jorphan/org/apache/jorphan/timer/,v 1.4 2004/02/11 23:57:23 sebb Exp $
 * Copyright 2002-2004 The Apache Software Foundation.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.jorphan.timer;

 * A package-private implementation of {@link ITimer} based around native
 * getTime method. It will work on any platform for which a JNI
 * implementation of "hrtlib" library is available.

* * {@link TimerFactory} acts as the Factory for this class.

* * MT-safety: an instance of this class is safe to be used within the same * thread only. * * @author Vlad Roubtsov * @author Originally published in JavaWorld * @version $Revision: 1.4 $ */ final class HRTimer extends AbstractTimer { private static final String HRTIMER_LIB = "hrtlib"; static { try { System.loadLibrary (HRTIMER_LIB); } catch (UnsatisfiedLinkError e) { System.out.println ("native lib '" + HRTIMER_LIB + "' not found in 'java.library.path': " + System.getProperty ("java.library.path")); throw e; // re-throw } } /* * This is supposed to return a fractional count of milliseconds elapsed * since some indeterminate moment in the past. The exact starting point * is not relevant because this timer class reports time differences only. * * JNI code in HRTIMER_LIB library is supposed to implement this. */ private static native double getTime (); protected double getCurrentTime() { return getTime(); } }

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