1 /*
   2  * Copyright (c) 2016, 2017, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 import java.util.Arrays;
  25 
  26 public class TestJNICritical {
  27     static {
  28         System.loadLibrary("TestJNICritical");
  29     }
  30 
  31     private static final int NUM_RUNS   = 10000;
  32     private static final int ARRAY_SIZE = 10000;
  33     private static int[] a;
  34     private static int[] b;
  35 
  36     private static native void copyAtoB(int[] a, int[] b);
  37 
  38     public static void main(String[] args) {
  39         a = new int[ARRAY_SIZE];
  40         b = new int[ARRAY_SIZE];
  41         for (int i = 0; i < NUM_RUNS; i++) {
  42             test();
  43         }
  44     }
  45 
  46     private static void test() {
  47         int[] a1 = new int[ARRAY_SIZE];
  48         int[] b1 = new int[ARRAY_SIZE];
  49         fillArray(a);
  50         copyAtoB(a, b);
  51         copyAtoB(a1, b1); // Don't optimize out garbage arrays.
  52         if (!Arrays.equals(a, b)) {
  53             throw new RuntimeException("arrays not equal");
  54         }
  55     }
  56 
  57     private static void fillArray(int[] array) {
  58         for (int i = 0; i < ARRAY_SIZE; i++) {
  59             int val = (int) (Math.random() * Integer.MAX_VALUE);
  60             array[i] = val;
  61         }
  62     }
  63 }