1 /* 2 * Copyright (c) 2007, 2012, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.jtt.jdk; 24 25 import org.junit.Test; 26 27 import org.graalvm.compiler.jtt.JTTTest; 28 29 /* 30 */ 31 public class System_currentTimeMillis02 extends JTTTest { 32 33 static void m(long[] times) { 34 times[1] = System.currentTimeMillis() - times[0]; 35 } 36 37 public static boolean test() { 38 long[] times = new long[2]; // { start, delta } 39 times[0] = System.currentTimeMillis(); 40 times[1] = 0; 41 // force compilation: 42 for (int i = 0; i < 5000; i++) { 43 m(times); 44 } 45 times[0] = System.currentTimeMillis(); 46 times[1] = 0; 47 for (int i = 0; times[1] == 0 && i < 5000000; i++) { 48 m(times); 49 // do nothing. 50 } 51 // better get at least 100 millisecond resolution. 52 return times[1] >= 1 && times[1] < 100; 53 } 54 55 @Test 56 public void run0() throws Throwable { 57 runTest("test"); 58 } 59 60 }