1/*
2 * Copyright (c) 2011 SAP SE. 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
24/*
25 * @test TestShortArraycopy
26 * @bug 7100935
27 * @summary  verify that shorts are copied element-wise atomic.
28 * @run main/othervm -Xint TestShortArraycopy
29 * @run main/othervm -Xcomp -Xbatch TestShortArraycopy
30 * @author volker.simonis@gmail.com
31 */
32
33public class TestShortArraycopy {
34
35  static short[] a1 = new short[8];
36  static short[] a2 = new short[8];
37  static short[] a3 = new short[8];
38
39  static volatile boolean keepRunning = true;
40
41  public static void main(String[] args) throws InterruptedException {
42
43    for (int i = 0; i < a1.length ; i++) {
44      a1[i] = (short)0xffff;
45      a2[i] = (short)0xffff;
46      a3[i] = (short)0x0000;
47    }
48    Thread reader = new Thread() {
49      public void run() {
50        while (keepRunning) {
51          for (int j = 0; j < a1.length; j++) {
52            short s = a1[j];
53            if (s != (short)0xffff && s != (short)0x0000) {
54              System.out.println("Error: s = " + s);
55              throw new RuntimeException("wrong result");
56
57            }
58          }
59        }
60      }
61    };
62    Thread writer = new Thread() {
63      public void run() {
64        for (int i = 0; i < 1000000; i++) {
65          System.arraycopy(a2, 5, a1, 3, 3);
66          System.arraycopy(a3, 5, a1, 3, 3);
67        }
68      }
69    };
70    keepRunning = true;
71    reader.start();
72    writer.start();
73    writer.join();
74    keepRunning = false;
75    reader.join();
76  }
77}
78