Mirror of the BLOAT repository
https://www.cs.purdue.edu/homes/hosking/bloat/
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76 lines
2.1 KiB
76 lines
2.1 KiB
/**
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* All files in the distribution of BLOAT (Bytecode Level Optimization and
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* Analysis tool for Java(tm)) are Copyright 1997-2001 by the Purdue
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* Research Foundation of Purdue University. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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package EDU.purdue.cs.bloat.benchmark;
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/**
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* This class allows Java to access the information obtained by the UNIX system
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* call <tt>times</tt>.
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*/
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public class Times {
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static {
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// Load native code from libbenchmark.so
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System.loadLibrary("times");
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}
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static float userTime;
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static float systemTime;
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/**
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* Takes a "snapshot" of the system. Reads various items from the result of
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* <tt>times</tt>.
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*
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* @return <tt>true</tt> if everything is successful
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*/
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public static native boolean snapshot();
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/**
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* Returns the user time used by this process in seconds.
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*/
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public static float userTime() {
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return (Times.userTime);
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}
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/**
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* Returns the system time used by this process in seconds.
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*/
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public static float systemTime() {
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return (Times.systemTime);
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}
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/**
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* Test program.
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*/
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public static void main(final String[] args) throws Exception {
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System.out.println("Starting Test");
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if (Times.snapshot() == false) {
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System.err.println("Error during snapshot");
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System.exit(1);
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}
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System.out.println("System time: " + Times.systemTime());
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System.out.println("User time: " + Times.userTime());
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System.out.println("Ending Test");
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}
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}
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