98 lines
3.1 KiB
Java
98 lines
3.1 KiB
Java
/*
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* Copyright (c) 1999, 2024, 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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/*
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* @test
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* @bug 4212687
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* @summary Verifies that calling EventQueue.push() and EventQueue.pop()
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* does not deadlock.
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* @library /java/awt/regtesthelpers
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* @build PassFailJFrame
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* @run main/manual PushPopDeadlock
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*/
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import java.awt.EventQueue;
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import java.awt.Frame;
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import java.awt.Label;
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import java.awt.Robot;
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import java.awt.Toolkit;
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public class PushPopDeadlock {
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static int counter = 0;
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static Robot robot;
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static Frame f;
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static Label l;
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public static void main(String[] args) throws Exception {
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robot = new Robot();
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String INSTRUCTIONS = """
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Click rapidly in the Frame labeled 'Click Here!'.
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The number in the Frame should continue to increase. If the number
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stops increasing (remains at a constant value), the test fails.
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""";
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PassFailJFrame pfJFrame = PassFailJFrame.builder()
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.title("Test Instructions")
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.instructions(INSTRUCTIONS)
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.rows((int) INSTRUCTIONS.lines().count() + 2)
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.columns(35)
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.testUI(PushPopDeadlock::createUI)
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.build();
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PushPopDeadlock.test();
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pfJFrame.awaitAndCheck();
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}
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public static Frame createUI() {
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f = new Frame("Click Here!");
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l = new Label("Counter: " + counter);
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f.add(l);
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f.setSize(200, 200);
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return f;
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}
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public static void test() {
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EventQueue q = new EventQueue() {
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public void push(EventQueue queue) {
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super.push(queue);
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pop();
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}
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};
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EventQueue q2 = new EventQueue();
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Toolkit.getDefaultToolkit().getSystemEventQueue().push(q);
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new Thread(() -> {
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while (true) {
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robot.delay(500);
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l.setText("Counter: " + ++counter);
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q.push(q2);
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try {
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Thread.currentThread().sleep(500);
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} catch (InterruptedException e) {
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return;
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}
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}
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}).start();
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}
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}
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