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jsr166 |
1.1 |
/* |
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jsr166 |
1.2 |
* Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved. |
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jsr166 |
1.1 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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jsr166 |
1.2 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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jsr166 |
1.1 |
*/ |
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jsr166 |
1.3 |
/* |
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jsr166 |
1.1 |
* @test |
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* @bug 4268780 |
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* @summary Collection-views of submap-views of synchronized-views of |
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* SortedMap objects do not synchronize on the correct object. |
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* (Got that?) |
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*/ |
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jsr166 |
1.4 |
import java.util.Collection; |
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import java.util.Collections; |
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import java.util.Map; |
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import java.util.SortedMap; |
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import java.util.TreeMap; |
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jsr166 |
1.1 |
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public class ViewSynch { |
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static final Integer ZERO = new Integer(0); |
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static final Int INT_ZERO = new Int(0); |
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static final Int INT_ONE = new Int(1); |
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static SortedMap m = Collections.synchronizedSortedMap(new TreeMap()); |
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static Map m2 = m.tailMap(ZERO); |
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static Collection c = m2.values(); |
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public static void main(String[] args) { |
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for (int i=0; i<10000; i++) |
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m.put(new Integer(i), INT_ZERO); |
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new Thread() { |
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public void run() { |
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for (int i=0; i<100; i++) { |
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Thread.yield(); |
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m.remove(ZERO); |
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m.put(ZERO, INT_ZERO); |
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} |
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} |
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}.start(); |
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c.contains(INT_ONE); |
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} |
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} |
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/** |
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* Like Integer, except yields while doing equals comparison, to allow |
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* for interleaving. |
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*/ |
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class Int { |
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Integer x; |
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Int(int i) {x = new Integer(i);} |
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public boolean equals(Object o) { |
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Thread.yield(); |
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Int i = (Int)o; |
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return x.equals(i.x); |
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} |
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public int hashCode() {return x.hashCode();} |
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} |
