72 lines
2.5 KiB
Java
72 lines
2.5 KiB
Java
/*
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* Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
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* 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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* 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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*/
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/* @test
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* @bug 6436220
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* @summary SelectionKey.attach should atomically set and return the attachment
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*/
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import java.nio.channels.*;
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import java.util.concurrent.atomic.*;
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public class AtomicAttachTest {
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public static void main(String[] args) throws Exception {
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Selector selector = Selector.open();
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Pipe pipe = Pipe.open();
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SelectableChannel channel = pipe.sink().configureBlocking(false);
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final SelectionKey key = channel.register(selector, 0);
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key.attach(new AtomicBoolean());
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final AtomicInteger errorCount = new AtomicInteger();
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Thread t = new Thread() {
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public void run() {
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AtomicBoolean att = new AtomicBoolean();
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for (int i=0; i<(10*1000*1000); i++) {
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att = (AtomicBoolean)key.attach(att);
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// We should have exclusive ownership of att.
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if (!att.compareAndSet(false, true) ||
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!att.compareAndSet(true, false))
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{
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errorCount.incrementAndGet();
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}
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}
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}
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{
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start();
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run();
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}
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};
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t.join();
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pipe.sink().close();
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pipe.source().close();
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selector.close();
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int count = errorCount.get();
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if (count > 0) {
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throw new RuntimeException("Error count:" + count);
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}
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}
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}
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