129 lines
3.9 KiB
Java
129 lines
3.9 KiB
Java
/*
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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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* This file is available under and governed by the GNU General Public
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* License version 2 only, as published by the Free Software Foundation.
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* However, the following notice accompanied the original version of this
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* file:
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*
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* Written by Doug Lea with assistance from members of JCP JSR-166
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* Expert Group and released to the public domain, as explained at
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* http://creativecommons.org/publicdomain/zero/1.0/
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* Other contributors include Andrew Wright, Jeffrey Hayes,
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* Pat Fisher, Mike Judd.
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*/
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import junit.framework.Test;
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import junit.framework.TestSuite;
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public class ThreadLocalTest extends JSR166TestCase {
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public static void main(String[] args) {
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main(suite(), args);
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}
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public static Test suite() {
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return new TestSuite(ThreadLocalTest.class);
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}
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static ThreadLocal<Item> tl = new ThreadLocal<>() {
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public Item initialValue() {
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return one;
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}
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};
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static InheritableThreadLocal<Item> itl =
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new InheritableThreadLocal<>() {
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protected Item initialValue() {
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return zero;
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}
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protected Item childValue(Item parentValue) {
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return new Item(parentValue.intValue() + 1);
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}
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};
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/**
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* remove causes next access to return initial value
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*/
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public void testRemove() {
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assertSame(tl.get(), one);
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tl.set(two);
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assertSame(tl.get(), two);
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tl.remove();
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assertSame(tl.get(), one);
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}
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/**
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* remove in InheritableThreadLocal causes next access to return
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* initial value
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*/
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public void testRemoveITL() {
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assertSame(itl.get(), zero);
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itl.set(two);
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assertSame(itl.get(), two);
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itl.remove();
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assertSame(itl.get(), zero);
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}
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private class ITLThread extends Thread {
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final int[] x;
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ITLThread(int[] array) { x = array; }
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public void run() {
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Thread child = null;
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if (itl.get().intValue() < x.length - 1) {
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child = new ITLThread(x);
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child.start();
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}
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Thread.yield();
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int threadId = itl.get().intValue();
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for (int j = 0; j < threadId; j++) {
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x[threadId]++;
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Thread.yield();
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}
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if (child != null) { // Wait for child (if any)
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try {
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child.join();
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} catch (InterruptedException e) {
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threadUnexpectedException(e);
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}
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}
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}
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}
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/**
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* InheritableThreadLocal propagates generic values.
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*/
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public void testGenericITL() throws InterruptedException {
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final int threadCount = 10;
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final int[] x = new int[threadCount];
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Thread progenitor = new ITLThread(x);
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progenitor.start();
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progenitor.join();
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for (int i = 0; i < threadCount; i++) {
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assertEquals(i, x[i]);
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}
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}
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}
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