01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package EDU.purdue.cs.bloat.benchmark;
22:
23: /**
24: * This class allows Java to access the information obtained by the UNIX system
25: * call <tt>times</tt>.
26: */
27: public class Times {
28: static {
29: // Load native code from libbenchmark.so
30: System.loadLibrary("times");
31: }
32:
33: static float userTime;
34:
35: static float systemTime;
36:
37: /**
38: * Takes a "snapshot" of the system. Reads various items from the result of
39: * <tt>times</tt>.
40: *
41: * @return <tt>true</tt> if everything is successful
42: */
43: public static native boolean snapshot();
44:
45: /**
46: * Returns the user time used by this process in seconds.
47: */
48: public static float userTime() {
49: return (Times.userTime);
50: }
51:
52: /**
53: * Returns the system time used by this process in seconds.
54: */
55: public static float systemTime() {
56: return (Times.systemTime);
57: }
58:
59: /**
60: * Test program.
61: */
62: public static void main(final String[] args) throws Exception {
63: System.out.println("Starting Test");
64:
65: if (Times.snapshot() == false) {
66: System.err.println("Error during snapshot");
67: System.exit(1);
68: }
69:
70: System.out.println("System time: " + Times.systemTime());
71: System.out.println("User time: " + Times.userTime());
72:
73: System.out.println("Ending Test");
74: }
75:
76: }
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