85 lines
2.9 KiB
Java
85 lines
2.9 KiB
Java
/*
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* Copyright (c) 2004, 2017, 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 5004077
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* @summary Check blocking of select and close
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*/
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import java.nio.channels.*;
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import java.io.IOException;
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import java.util.concurrent.CountDownLatch;
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public class SelectAndClose {
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static Selector selector;
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static volatile boolean awakened = false;
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static volatile boolean closed = false;
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public static void main(String[] args) throws Exception {
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selector = Selector.open();
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// Create and start a selector in a separate thread.
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final CountDownLatch selectLatch = new CountDownLatch(1);
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new Thread(new Runnable() {
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public void run() {
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try {
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selectLatch.countDown();
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selector.select();
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awakened = true;
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} catch (IOException e) {
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System.err.println(e);
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}
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}
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}).start();
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// Wait for above thread to get to select() before we call close.
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selectLatch.await();
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Thread.sleep(2000);
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// Try to close. This should wakeup select.
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Thread closeThread = new Thread(new Runnable() {
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public void run() {
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try {
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selector.close();
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closed = true;
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} catch (IOException e) {
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System.err.println(e);
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}
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}
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});
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closeThread.start();
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// Wait for select() to be awakened, which should be done by close.
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closeThread.join();
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if (!awakened)
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selector.wakeup();
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// Correct result is true and true
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if (!awakened)
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throw new RuntimeException("Select did not wake up");
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if (!closed)
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throw new RuntimeException("Selector did not close");
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}
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}
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