70 lines
2.2 KiB
Java
70 lines
2.2 KiB
Java
/*
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* Copyright (c) 2019, 2023, 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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* @summary Test that virtual threads are GC'ed
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* @run junit Collectable
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*/
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import java.lang.ref.WeakReference;
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import java.util.concurrent.locks.LockSupport;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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class Collectable {
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/**
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* Test that an unstarted virtual thread can be GC"ed.
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*/
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@Test
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void testUnstartedThread() {
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var thread = Thread.ofVirtual().unstarted(() -> { });
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var ref = new WeakReference<>(thread);
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thread = null;
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waitUntilCleared(ref);
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}
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/**
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* Test that a terminated virtual thread can be GC'ed.
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*/
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@Test
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void testTerminatedThread() throws Exception {
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var thread = Thread.ofVirtual().start(() -> { });
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thread.join();
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var ref = new WeakReference<>(thread);
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thread = null;
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waitUntilCleared(ref);
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}
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private static void waitUntilCleared(WeakReference<?> ref) {
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while (ref.get() != null) {
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System.gc();
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try {
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Thread.sleep(50);
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} catch (InterruptedException ignore) { }
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}
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}
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}
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