1772 lines
68 KiB
Java
1772 lines
68 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 static java.util.concurrent.TimeUnit.MILLISECONDS;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.HashSet;
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import java.util.concurrent.Callable;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.locks.Condition;
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import java.util.concurrent.locks.Lock;
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import java.util.concurrent.locks.ReentrantReadWriteLock;
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import junit.framework.Test;
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import junit.framework.TestSuite;
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@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
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public class ReentrantReadWriteLockTest 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(ReentrantReadWriteLockTest.class);
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}
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/**
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* A runnable calling lockInterruptibly
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*/
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class InterruptibleLockRunnable extends CheckedRunnable {
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final ReentrantReadWriteLock lock;
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InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
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public void realRun() throws InterruptedException {
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lock.writeLock().lockInterruptibly();
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}
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}
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/**
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* A runnable calling lockInterruptibly that expects to be
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* interrupted
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*/
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class InterruptedLockRunnable extends CheckedInterruptedRunnable {
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final ReentrantReadWriteLock lock;
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InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
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public void realRun() throws InterruptedException {
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lock.writeLock().lockInterruptibly();
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}
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}
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/**
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* Subclass to expose protected methods
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*/
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static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
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PublicReentrantReadWriteLock() { super(); }
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PublicReentrantReadWriteLock(boolean fair) { super(fair); }
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public Thread getOwner() {
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return super.getOwner();
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}
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public Collection<Thread> getQueuedThreads() {
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return super.getQueuedThreads();
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}
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public Collection<Thread> getWaitingThreads(Condition c) {
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return super.getWaitingThreads(c);
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}
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}
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/**
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* Releases write lock, checking that it had a hold count of 1.
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*/
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void releaseWriteLock(PublicReentrantReadWriteLock lock) {
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ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
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assertWriteLockedByMoi(lock);
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assertEquals(1, lock.getWriteHoldCount());
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writeLock.unlock();
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assertNotWriteLocked(lock);
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}
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/**
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* Spin-waits until lock.hasQueuedThread(t) becomes true.
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*/
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void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
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long startTime = System.nanoTime();
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while (!lock.hasQueuedThread(t)) {
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if (millisElapsedSince(startTime) > LONG_DELAY_MS)
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throw new AssertionError("timed out");
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Thread.yield();
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}
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assertTrue(t.isAlive());
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assertNotSame(t, lock.getOwner());
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}
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/**
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* Checks that lock is not write-locked.
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*/
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void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
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assertFalse(lock.isWriteLocked());
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assertFalse(lock.isWriteLockedByCurrentThread());
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assertFalse(lock.writeLock().isHeldByCurrentThread());
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assertEquals(0, lock.getWriteHoldCount());
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assertEquals(0, lock.writeLock().getHoldCount());
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assertNull(lock.getOwner());
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}
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/**
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* Checks that lock is write-locked by the given thread.
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*/
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void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
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assertTrue(lock.isWriteLocked());
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assertSame(t, lock.getOwner());
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assertEquals(t == Thread.currentThread(),
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lock.isWriteLockedByCurrentThread());
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assertEquals(t == Thread.currentThread(),
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lock.writeLock().isHeldByCurrentThread());
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assertEquals(t == Thread.currentThread(),
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lock.getWriteHoldCount() > 0);
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assertEquals(t == Thread.currentThread(),
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lock.writeLock().getHoldCount() > 0);
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assertEquals(0, lock.getReadLockCount());
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}
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/**
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* Checks that lock is write-locked by the current thread.
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*/
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void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
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assertWriteLockedBy(lock, Thread.currentThread());
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}
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/**
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* Checks that condition c has no waiters.
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*/
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void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
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assertHasWaiters(lock, c, new Thread[] {});
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}
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/**
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* Checks that condition c has exactly the given waiter threads.
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*/
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void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
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Thread... threads) {
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lock.writeLock().lock();
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assertEquals(threads.length > 0, lock.hasWaiters(c));
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assertEquals(threads.length, lock.getWaitQueueLength(c));
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assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
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assertEquals(threads.length, lock.getWaitingThreads(c).size());
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assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
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new HashSet<Thread>(Arrays.asList(threads)));
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lock.writeLock().unlock();
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}
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enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
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/**
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* Awaits condition "indefinitely" using the specified AwaitMethod.
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*/
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void await(Condition c, AwaitMethod awaitMethod)
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throws InterruptedException {
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long timeoutMillis = 2 * LONG_DELAY_MS;
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switch (awaitMethod) {
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case await:
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c.await();
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break;
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case awaitTimed:
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assertTrue(c.await(timeoutMillis, MILLISECONDS));
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break;
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case awaitNanos:
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long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
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long nanosRemaining = c.awaitNanos(timeoutNanos);
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assertTrue(nanosRemaining > timeoutNanos / 2);
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assertTrue(nanosRemaining <= timeoutNanos);
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break;
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case awaitUntil:
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assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
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break;
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default:
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throw new AssertionError();
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}
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}
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/**
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* Constructor sets given fairness, and is in unlocked state
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*/
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public void testConstructor() {
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PublicReentrantReadWriteLock lock;
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lock = new PublicReentrantReadWriteLock();
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assertFalse(lock.isFair());
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assertNotWriteLocked(lock);
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assertEquals(0, lock.getReadLockCount());
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lock = new PublicReentrantReadWriteLock(true);
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assertTrue(lock.isFair());
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assertNotWriteLocked(lock);
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assertEquals(0, lock.getReadLockCount());
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lock = new PublicReentrantReadWriteLock(false);
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assertFalse(lock.isFair());
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assertNotWriteLocked(lock);
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assertEquals(0, lock.getReadLockCount());
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}
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/**
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* write-locking and read-locking an unlocked lock succeed
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*/
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public void testLock() { testLock(false); }
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public void testLock_fair() { testLock(true); }
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public void testLock(boolean fair) {
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PublicReentrantReadWriteLock lock =
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new PublicReentrantReadWriteLock(fair);
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assertNotWriteLocked(lock);
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lock.writeLock().lock();
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assertWriteLockedByMoi(lock);
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lock.writeLock().unlock();
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assertNotWriteLocked(lock);
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assertEquals(0, lock.getReadLockCount());
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lock.readLock().lock();
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assertNotWriteLocked(lock);
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assertEquals(1, lock.getReadLockCount());
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lock.readLock().unlock();
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assertNotWriteLocked(lock);
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assertEquals(0, lock.getReadLockCount());
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}
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/**
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* getWriteHoldCount returns number of recursive holds
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*/
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public void testGetWriteHoldCount() { testGetWriteHoldCount(false); }
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public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
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public void testGetWriteHoldCount(boolean fair) {
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
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for (int i = 1; i <= SIZE; i++) {
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lock.writeLock().lock();
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assertEquals(i,lock.getWriteHoldCount());
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}
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for (int i = SIZE; i > 0; i--) {
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lock.writeLock().unlock();
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assertEquals(i - 1,lock.getWriteHoldCount());
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}
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}
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/**
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* writelock.getHoldCount returns number of recursive holds
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*/
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public void testGetHoldCount() { testGetHoldCount(false); }
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public void testGetHoldCount_fair() { testGetHoldCount(true); }
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public void testGetHoldCount(boolean fair) {
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
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for (int i = 1; i <= SIZE; i++) {
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lock.writeLock().lock();
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assertEquals(i,lock.writeLock().getHoldCount());
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}
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for (int i = SIZE; i > 0; i--) {
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lock.writeLock().unlock();
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assertEquals(i - 1,lock.writeLock().getHoldCount());
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}
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}
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/**
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* getReadHoldCount returns number of recursive holds
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*/
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public void testGetReadHoldCount() { testGetReadHoldCount(false); }
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public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
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public void testGetReadHoldCount(boolean fair) {
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
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for (int i = 1; i <= SIZE; i++) {
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lock.readLock().lock();
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assertEquals(i,lock.getReadHoldCount());
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}
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for (int i = SIZE; i > 0; i--) {
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lock.readLock().unlock();
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assertEquals(i - 1,lock.getReadHoldCount());
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}
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}
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/**
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* write-unlocking an unlocked lock throws IllegalMonitorStateException
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*/
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public void testWriteUnlock_IMSE() { testWriteUnlock_IMSE(false); }
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public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
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public void testWriteUnlock_IMSE(boolean fair) {
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
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try {
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lock.writeLock().unlock();
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shouldThrow();
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} catch (IllegalMonitorStateException success) {}
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}
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/**
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* read-unlocking an unlocked lock throws IllegalMonitorStateException
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*/
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public void testReadUnlock_IMSE() { testReadUnlock_IMSE(false); }
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public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
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public void testReadUnlock_IMSE(boolean fair) {
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
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try {
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lock.readLock().unlock();
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shouldThrow();
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} catch (IllegalMonitorStateException success) {}
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}
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/**
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* write-lockInterruptibly is interruptible
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*/
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public void testWriteLockInterruptibly_Interruptible() { testWriteLockInterruptibly_Interruptible(false); }
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public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
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public void testWriteLockInterruptibly_Interruptible(boolean fair) {
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final PublicReentrantReadWriteLock lock =
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new PublicReentrantReadWriteLock(fair);
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lock.writeLock().lock();
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Thread t = newStartedThread(new CheckedInterruptedRunnable() {
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public void realRun() throws InterruptedException {
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lock.writeLock().lockInterruptibly();
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}});
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waitForQueuedThread(lock, t);
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t.interrupt();
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awaitTermination(t);
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releaseWriteLock(lock);
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}
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/**
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* timed write-tryLock is interruptible
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*/
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public void testWriteTryLock_Interruptible() { testWriteTryLock_Interruptible(false); }
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public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
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public void testWriteTryLock_Interruptible(boolean fair) {
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final PublicReentrantReadWriteLock lock =
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new PublicReentrantReadWriteLock(fair);
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lock.writeLock().lock();
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Thread t = newStartedThread(new CheckedInterruptedRunnable() {
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public void realRun() throws InterruptedException {
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lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
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}});
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waitForQueuedThread(lock, t);
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t.interrupt();
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awaitTermination(t);
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releaseWriteLock(lock);
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}
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/**
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* read-lockInterruptibly is interruptible
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*/
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public void testReadLockInterruptibly_Interruptible() { testReadLockInterruptibly_Interruptible(false); }
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public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
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public void testReadLockInterruptibly_Interruptible(boolean fair) {
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final PublicReentrantReadWriteLock lock =
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new PublicReentrantReadWriteLock(fair);
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lock.writeLock().lock();
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Thread t = newStartedThread(new CheckedInterruptedRunnable() {
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public void realRun() throws InterruptedException {
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lock.readLock().lockInterruptibly();
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}});
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waitForQueuedThread(lock, t);
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t.interrupt();
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awaitTermination(t);
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releaseWriteLock(lock);
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}
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/**
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* timed read-tryLock is interruptible
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*/
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public void testReadTryLock_Interruptible() { testReadTryLock_Interruptible(false); }
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public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
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public void testReadTryLock_Interruptible(boolean fair) {
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final PublicReentrantReadWriteLock lock =
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new PublicReentrantReadWriteLock(fair);
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lock.writeLock().lock();
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Thread t = newStartedThread(new CheckedInterruptedRunnable() {
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public void realRun() throws InterruptedException {
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lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
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}});
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waitForQueuedThread(lock, t);
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t.interrupt();
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awaitTermination(t);
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releaseWriteLock(lock);
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}
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/**
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* write-tryLock on an unlocked lock succeeds
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*/
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public void testWriteTryLock() { testWriteTryLock(false); }
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public void testWriteTryLock_fair() { testWriteTryLock(true); }
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public void testWriteTryLock(boolean fair) {
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final PublicReentrantReadWriteLock lock =
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new PublicReentrantReadWriteLock(fair);
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assertTrue(lock.writeLock().tryLock());
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assertWriteLockedByMoi(lock);
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assertTrue(lock.writeLock().tryLock());
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assertWriteLockedByMoi(lock);
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lock.writeLock().unlock();
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releaseWriteLock(lock);
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}
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/**
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* write-tryLock fails if locked
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*/
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public void testWriteTryLockWhenLocked() { testWriteTryLockWhenLocked(false); }
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public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
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public void testWriteTryLockWhenLocked(boolean fair) {
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final PublicReentrantReadWriteLock lock =
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new PublicReentrantReadWriteLock(fair);
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lock.writeLock().lock();
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Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() {
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assertFalse(lock.writeLock().tryLock());
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}});
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awaitTermination(t);
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releaseWriteLock(lock);
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}
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/**
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* read-tryLock fails if locked
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*/
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public void testReadTryLockWhenLocked() { testReadTryLockWhenLocked(false); }
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public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
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public void testReadTryLockWhenLocked(boolean fair) {
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final PublicReentrantReadWriteLock lock =
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new PublicReentrantReadWriteLock(fair);
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lock.writeLock().lock();
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Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() {
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assertFalse(lock.readLock().tryLock());
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}});
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awaitTermination(t);
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releaseWriteLock(lock);
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}
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/**
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* Multiple threads can hold a read lock when not write-locked
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*/
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public void testMultipleReadLocks() { testMultipleReadLocks(false); }
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public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
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public void testMultipleReadLocks(boolean fair) {
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
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lock.readLock().lock();
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Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() throws InterruptedException {
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assertTrue(lock.readLock().tryLock());
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lock.readLock().unlock();
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assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
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lock.readLock().unlock();
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lock.readLock().lock();
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lock.readLock().unlock();
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}});
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awaitTermination(t);
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lock.readLock().unlock();
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}
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/**
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* A writelock succeeds only after a reading thread unlocks
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*/
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public void testWriteAfterReadLock() { testWriteAfterReadLock(false); }
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public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
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public void testWriteAfterReadLock(boolean fair) {
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final PublicReentrantReadWriteLock lock =
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new PublicReentrantReadWriteLock(fair);
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lock.readLock().lock();
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Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() {
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assertEquals(1, lock.getReadLockCount());
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lock.writeLock().lock();
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assertEquals(0, lock.getReadLockCount());
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lock.writeLock().unlock();
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|
}});
|
|
waitForQueuedThread(lock, t);
|
|
assertNotWriteLocked(lock);
|
|
assertEquals(1, lock.getReadLockCount());
|
|
lock.readLock().unlock();
|
|
assertEquals(0, lock.getReadLockCount());
|
|
awaitTermination(t);
|
|
assertNotWriteLocked(lock);
|
|
}
|
|
|
|
/**
|
|
* A writelock succeeds only after reading threads unlock
|
|
*/
|
|
public void testWriteAfterMultipleReadLocks() { testWriteAfterMultipleReadLocks(false); }
|
|
public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
|
|
public void testWriteAfterMultipleReadLocks(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
lock.readLock().lock();
|
|
lock.readLock().lock();
|
|
Thread t1 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.readLock().lock();
|
|
assertEquals(3, lock.getReadLockCount());
|
|
lock.readLock().unlock();
|
|
}});
|
|
awaitTermination(t1);
|
|
|
|
Thread t2 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
assertEquals(2, lock.getReadLockCount());
|
|
lock.writeLock().lock();
|
|
assertEquals(0, lock.getReadLockCount());
|
|
lock.writeLock().unlock();
|
|
}});
|
|
waitForQueuedThread(lock, t2);
|
|
assertNotWriteLocked(lock);
|
|
assertEquals(2, lock.getReadLockCount());
|
|
lock.readLock().unlock();
|
|
lock.readLock().unlock();
|
|
assertEquals(0, lock.getReadLockCount());
|
|
awaitTermination(t2);
|
|
assertNotWriteLocked(lock);
|
|
}
|
|
|
|
/**
|
|
* A thread that tries to acquire a fair read lock (non-reentrantly)
|
|
* will block if there is a waiting writer thread
|
|
*/
|
|
public void testReaderWriterReaderFairFifo() {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(true);
|
|
final AtomicBoolean t1GotLock = new AtomicBoolean(false);
|
|
|
|
lock.readLock().lock();
|
|
Thread t1 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
assertEquals(1, lock.getReadLockCount());
|
|
lock.writeLock().lock();
|
|
assertEquals(0, lock.getReadLockCount());
|
|
t1GotLock.set(true);
|
|
lock.writeLock().unlock();
|
|
}});
|
|
waitForQueuedThread(lock, t1);
|
|
|
|
Thread t2 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
assertEquals(1, lock.getReadLockCount());
|
|
lock.readLock().lock();
|
|
assertEquals(1, lock.getReadLockCount());
|
|
assertTrue(t1GotLock.get());
|
|
lock.readLock().unlock();
|
|
}});
|
|
waitForQueuedThread(lock, t2);
|
|
assertTrue(t1.isAlive());
|
|
assertNotWriteLocked(lock);
|
|
assertEquals(1, lock.getReadLockCount());
|
|
lock.readLock().unlock();
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
assertNotWriteLocked(lock);
|
|
}
|
|
|
|
/**
|
|
* Readlocks succeed only after a writing thread unlocks
|
|
*/
|
|
public void testReadAfterWriteLock() { testReadAfterWriteLock(false); }
|
|
public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
|
|
public void testReadAfterWriteLock(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
lock.writeLock().lock();
|
|
Thread t1 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.readLock().lock();
|
|
lock.readLock().unlock();
|
|
}});
|
|
Thread t2 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.readLock().lock();
|
|
lock.readLock().unlock();
|
|
}});
|
|
|
|
waitForQueuedThread(lock, t1);
|
|
waitForQueuedThread(lock, t2);
|
|
releaseWriteLock(lock);
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
}
|
|
|
|
/**
|
|
* Read trylock succeeds if write locked by current thread
|
|
*/
|
|
public void testReadHoldingWriteLock() { testReadHoldingWriteLock(false); }
|
|
public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
|
|
public void testReadHoldingWriteLock(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
lock.writeLock().lock();
|
|
assertTrue(lock.readLock().tryLock());
|
|
lock.readLock().unlock();
|
|
lock.writeLock().unlock();
|
|
}
|
|
|
|
/**
|
|
* Read trylock succeeds (barging) even in the presence of waiting
|
|
* readers and/or writers
|
|
*/
|
|
public void testReadTryLockBarging() { testReadTryLockBarging(false); }
|
|
public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
|
|
public void testReadTryLockBarging(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
lock.readLock().lock();
|
|
|
|
Thread t1 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.writeLock().lock();
|
|
lock.writeLock().unlock();
|
|
}});
|
|
|
|
waitForQueuedThread(lock, t1);
|
|
|
|
Thread t2 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.readLock().lock();
|
|
lock.readLock().unlock();
|
|
}});
|
|
|
|
if (fair)
|
|
waitForQueuedThread(lock, t2);
|
|
|
|
Thread t3 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.readLock().tryLock();
|
|
lock.readLock().unlock();
|
|
}});
|
|
|
|
assertTrue(lock.getReadLockCount() > 0);
|
|
awaitTermination(t3);
|
|
assertTrue(t1.isAlive());
|
|
if (fair) assertTrue(t2.isAlive());
|
|
lock.readLock().unlock();
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
}
|
|
|
|
/**
|
|
* Read lock succeeds if write locked by current thread even if
|
|
* other threads are waiting for readlock
|
|
*/
|
|
public void testReadHoldingWriteLock2() { testReadHoldingWriteLock2(false); }
|
|
public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
|
|
public void testReadHoldingWriteLock2(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
lock.writeLock().lock();
|
|
lock.readLock().lock();
|
|
lock.readLock().unlock();
|
|
|
|
Thread t1 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.readLock().lock();
|
|
lock.readLock().unlock();
|
|
}});
|
|
Thread t2 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.readLock().lock();
|
|
lock.readLock().unlock();
|
|
}});
|
|
|
|
waitForQueuedThread(lock, t1);
|
|
waitForQueuedThread(lock, t2);
|
|
assertWriteLockedByMoi(lock);
|
|
lock.readLock().lock();
|
|
lock.readLock().unlock();
|
|
releaseWriteLock(lock);
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
}
|
|
|
|
/**
|
|
* Read lock succeeds if write locked by current thread even if
|
|
* other threads are waiting for writelock
|
|
*/
|
|
public void testReadHoldingWriteLock3() { testReadHoldingWriteLock3(false); }
|
|
public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
|
|
public void testReadHoldingWriteLock3(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
lock.writeLock().lock();
|
|
lock.readLock().lock();
|
|
lock.readLock().unlock();
|
|
|
|
Thread t1 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.writeLock().lock();
|
|
lock.writeLock().unlock();
|
|
}});
|
|
Thread t2 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.writeLock().lock();
|
|
lock.writeLock().unlock();
|
|
}});
|
|
|
|
waitForQueuedThread(lock, t1);
|
|
waitForQueuedThread(lock, t2);
|
|
assertWriteLockedByMoi(lock);
|
|
lock.readLock().lock();
|
|
lock.readLock().unlock();
|
|
assertWriteLockedByMoi(lock);
|
|
lock.writeLock().unlock();
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
}
|
|
|
|
/**
|
|
* Write lock succeeds if write locked by current thread even if
|
|
* other threads are waiting for writelock
|
|
*/
|
|
public void testWriteHoldingWriteLock4() { testWriteHoldingWriteLock4(false); }
|
|
public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
|
|
public void testWriteHoldingWriteLock4(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
lock.writeLock().lock();
|
|
lock.writeLock().lock();
|
|
lock.writeLock().unlock();
|
|
|
|
Thread t1 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.writeLock().lock();
|
|
lock.writeLock().unlock();
|
|
}});
|
|
Thread t2 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
lock.writeLock().lock();
|
|
lock.writeLock().unlock();
|
|
}});
|
|
|
|
waitForQueuedThread(lock, t1);
|
|
waitForQueuedThread(lock, t2);
|
|
assertWriteLockedByMoi(lock);
|
|
assertEquals(1, lock.getWriteHoldCount());
|
|
lock.writeLock().lock();
|
|
assertWriteLockedByMoi(lock);
|
|
assertEquals(2, lock.getWriteHoldCount());
|
|
lock.writeLock().unlock();
|
|
assertWriteLockedByMoi(lock);
|
|
assertEquals(1, lock.getWriteHoldCount());
|
|
lock.writeLock().unlock();
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
}
|
|
|
|
/**
|
|
* Read tryLock succeeds if readlocked but not writelocked
|
|
*/
|
|
public void testTryLockWhenReadLocked() { testTryLockWhenReadLocked(false); }
|
|
public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
|
|
public void testTryLockWhenReadLocked(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
lock.readLock().lock();
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
assertTrue(lock.readLock().tryLock());
|
|
lock.readLock().unlock();
|
|
}});
|
|
|
|
awaitTermination(t);
|
|
lock.readLock().unlock();
|
|
}
|
|
|
|
/**
|
|
* write tryLock fails when readlocked
|
|
*/
|
|
public void testWriteTryLockWhenReadLocked() { testWriteTryLockWhenReadLocked(false); }
|
|
public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
|
|
public void testWriteTryLockWhenReadLocked(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
lock.readLock().lock();
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
assertFalse(lock.writeLock().tryLock());
|
|
}});
|
|
|
|
awaitTermination(t);
|
|
lock.readLock().unlock();
|
|
}
|
|
|
|
/**
|
|
* write timed tryLock times out if locked
|
|
*/
|
|
public void testWriteTryLock_Timeout() { testWriteTryLock_Timeout(false); }
|
|
public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
|
|
public void testWriteTryLock_Timeout(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final long timeoutMillis = timeoutMillis();
|
|
lock.writeLock().lock();
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
long startTime = System.nanoTime();
|
|
assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
|
|
}});
|
|
|
|
awaitTermination(t);
|
|
releaseWriteLock(lock);
|
|
}
|
|
|
|
/**
|
|
* read timed tryLock times out if write-locked
|
|
*/
|
|
public void testReadTryLock_Timeout() { testReadTryLock_Timeout(false); }
|
|
public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
|
|
public void testReadTryLock_Timeout(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
lock.writeLock().lock();
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
long startTime = System.nanoTime();
|
|
long timeoutMillis = timeoutMillis();
|
|
assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
|
|
}});
|
|
|
|
awaitTermination(t);
|
|
assertTrue(lock.writeLock().isHeldByCurrentThread());
|
|
lock.writeLock().unlock();
|
|
}
|
|
|
|
/**
|
|
* write lockInterruptibly succeeds if unlocked, else is interruptible
|
|
*/
|
|
public void testWriteLockInterruptibly() { testWriteLockInterruptibly(false); }
|
|
public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
|
|
public void testWriteLockInterruptibly(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
try {
|
|
lock.writeLock().lockInterruptibly();
|
|
} catch (InterruptedException fail) { threadUnexpectedException(fail); }
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
lock.writeLock().lockInterruptibly();
|
|
}});
|
|
|
|
waitForQueuedThread(lock, t);
|
|
t.interrupt();
|
|
assertTrue(lock.writeLock().isHeldByCurrentThread());
|
|
awaitTermination(t);
|
|
releaseWriteLock(lock);
|
|
}
|
|
|
|
/**
|
|
* read lockInterruptibly succeeds if lock free else is interruptible
|
|
*/
|
|
public void testReadLockInterruptibly() { testReadLockInterruptibly(false); }
|
|
public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
|
|
public void testReadLockInterruptibly(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
try {
|
|
lock.readLock().lockInterruptibly();
|
|
lock.readLock().unlock();
|
|
lock.writeLock().lockInterruptibly();
|
|
} catch (InterruptedException fail) { threadUnexpectedException(fail); }
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
lock.readLock().lockInterruptibly();
|
|
}});
|
|
|
|
waitForQueuedThread(lock, t);
|
|
t.interrupt();
|
|
awaitTermination(t);
|
|
releaseWriteLock(lock);
|
|
}
|
|
|
|
/**
|
|
* Calling await without holding lock throws IllegalMonitorStateException
|
|
*/
|
|
public void testAwait_IMSE() { testAwait_IMSE(false); }
|
|
public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
|
|
public void testAwait_IMSE(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
for (AwaitMethod awaitMethod : AwaitMethod.values()) {
|
|
long startTime = System.nanoTime();
|
|
try {
|
|
await(c, awaitMethod);
|
|
shouldThrow();
|
|
} catch (IllegalMonitorStateException success) {
|
|
} catch (InterruptedException fail) {
|
|
threadUnexpectedException(fail);
|
|
}
|
|
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Calling signal without holding lock throws IllegalMonitorStateException
|
|
*/
|
|
public void testSignal_IMSE() { testSignal_IMSE(false); }
|
|
public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
|
|
public void testSignal_IMSE(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
try {
|
|
c.signal();
|
|
shouldThrow();
|
|
} catch (IllegalMonitorStateException success) {}
|
|
}
|
|
|
|
/**
|
|
* Calling signalAll without holding lock throws IllegalMonitorStateException
|
|
*/
|
|
public void testSignalAll_IMSE() { testSignalAll_IMSE(false); }
|
|
public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
|
|
public void testSignalAll_IMSE(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
try {
|
|
c.signalAll();
|
|
shouldThrow();
|
|
} catch (IllegalMonitorStateException success) {}
|
|
}
|
|
|
|
/**
|
|
* awaitNanos without a signal times out
|
|
*/
|
|
public void testAwaitNanos_Timeout() { testAwaitNanos_Timeout(false); }
|
|
public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
|
|
public void testAwaitNanos_Timeout(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final long timeoutMillis = timeoutMillis();
|
|
lock.writeLock().lock();
|
|
final long startTime = System.nanoTime();
|
|
final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
|
|
try {
|
|
long nanosRemaining = c.awaitNanos(timeoutNanos);
|
|
assertTrue(nanosRemaining <= 0);
|
|
} catch (InterruptedException fail) { threadUnexpectedException(fail); }
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
|
|
lock.writeLock().unlock();
|
|
}
|
|
|
|
/**
|
|
* timed await without a signal times out
|
|
*/
|
|
public void testAwait_Timeout() { testAwait_Timeout(false); }
|
|
public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
|
|
public void testAwait_Timeout(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final long timeoutMillis = timeoutMillis();
|
|
lock.writeLock().lock();
|
|
final long startTime = System.nanoTime();
|
|
try {
|
|
assertFalse(c.await(timeoutMillis, MILLISECONDS));
|
|
} catch (InterruptedException fail) { threadUnexpectedException(fail); }
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
|
|
lock.writeLock().unlock();
|
|
}
|
|
|
|
/**
|
|
* awaitUntil without a signal times out
|
|
*/
|
|
public void testAwaitUntil_Timeout() { testAwaitUntil_Timeout(false); }
|
|
public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
|
|
public void testAwaitUntil_Timeout(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
lock.writeLock().lock();
|
|
// We shouldn't assume that nanoTime and currentTimeMillis
|
|
// use the same time source, so don't use nanoTime here.
|
|
final java.util.Date delayedDate = delayedDate(timeoutMillis());
|
|
try {
|
|
assertFalse(c.awaitUntil(delayedDate));
|
|
} catch (InterruptedException fail) { threadUnexpectedException(fail); }
|
|
assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
|
|
lock.writeLock().unlock();
|
|
}
|
|
|
|
/**
|
|
* await returns when signalled
|
|
*/
|
|
public void testAwait() { testAwait(false); }
|
|
public void testAwait_fair() { testAwait(true); }
|
|
public void testAwait(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final CountDownLatch locked = new CountDownLatch(1);
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
lock.writeLock().lock();
|
|
locked.countDown();
|
|
c.await();
|
|
lock.writeLock().unlock();
|
|
}});
|
|
|
|
await(locked);
|
|
lock.writeLock().lock();
|
|
assertHasWaiters(lock, c, t);
|
|
c.signal();
|
|
assertHasNoWaiters(lock, c);
|
|
assertTrue(t.isAlive());
|
|
lock.writeLock().unlock();
|
|
awaitTermination(t);
|
|
}
|
|
|
|
/**
|
|
* awaitUninterruptibly is uninterruptible
|
|
*/
|
|
public void testAwaitUninterruptibly() { testAwaitUninterruptibly(false); }
|
|
public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
|
|
public void testAwaitUninterruptibly(boolean fair) {
|
|
final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
|
|
final Condition condition = lock.newCondition();
|
|
final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
|
|
|
|
Thread t1 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
// Interrupt before awaitUninterruptibly
|
|
lock.lock();
|
|
pleaseInterrupt.countDown();
|
|
Thread.currentThread().interrupt();
|
|
condition.awaitUninterruptibly();
|
|
assertTrue(Thread.interrupted());
|
|
lock.unlock();
|
|
}});
|
|
|
|
Thread t2 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
// Interrupt during awaitUninterruptibly
|
|
lock.lock();
|
|
pleaseInterrupt.countDown();
|
|
condition.awaitUninterruptibly();
|
|
assertTrue(Thread.interrupted());
|
|
lock.unlock();
|
|
}});
|
|
|
|
await(pleaseInterrupt);
|
|
t2.interrupt();
|
|
lock.lock();
|
|
lock.unlock();
|
|
assertThreadBlocks(t1, Thread.State.WAITING);
|
|
assertThreadBlocks(t2, Thread.State.WAITING);
|
|
|
|
lock.lock();
|
|
condition.signalAll();
|
|
lock.unlock();
|
|
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
}
|
|
|
|
/**
|
|
* await/awaitNanos/awaitUntil is interruptible
|
|
*/
|
|
public void testInterruptible_await() { testInterruptible(false, AwaitMethod.await); }
|
|
public void testInterruptible_await_fair() { testInterruptible(true, AwaitMethod.await); }
|
|
public void testInterruptible_awaitTimed() { testInterruptible(false, AwaitMethod.awaitTimed); }
|
|
public void testInterruptible_awaitTimed_fair() { testInterruptible(true, AwaitMethod.awaitTimed); }
|
|
public void testInterruptible_awaitNanos() { testInterruptible(false, AwaitMethod.awaitNanos); }
|
|
public void testInterruptible_awaitNanos_fair() { testInterruptible(true, AwaitMethod.awaitNanos); }
|
|
public void testInterruptible_awaitUntil() { testInterruptible(false, AwaitMethod.awaitUntil); }
|
|
public void testInterruptible_awaitUntil_fair() { testInterruptible(true, AwaitMethod.awaitUntil); }
|
|
public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final CountDownLatch locked = new CountDownLatch(1);
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
lock.writeLock().lock();
|
|
assertWriteLockedByMoi(lock);
|
|
assertHasNoWaiters(lock, c);
|
|
locked.countDown();
|
|
try {
|
|
await(c, awaitMethod);
|
|
} finally {
|
|
assertWriteLockedByMoi(lock);
|
|
assertHasNoWaiters(lock, c);
|
|
lock.writeLock().unlock();
|
|
assertFalse(Thread.interrupted());
|
|
}
|
|
}});
|
|
|
|
await(locked);
|
|
assertHasWaiters(lock, c, t);
|
|
t.interrupt();
|
|
awaitTermination(t);
|
|
assertNotWriteLocked(lock);
|
|
}
|
|
|
|
/**
|
|
* signalAll wakes up all threads
|
|
*/
|
|
public void testSignalAll_await() { testSignalAll(false, AwaitMethod.await); }
|
|
public void testSignalAll_await_fair() { testSignalAll(true, AwaitMethod.await); }
|
|
public void testSignalAll_awaitTimed() { testSignalAll(false, AwaitMethod.awaitTimed); }
|
|
public void testSignalAll_awaitTimed_fair() { testSignalAll(true, AwaitMethod.awaitTimed); }
|
|
public void testSignalAll_awaitNanos() { testSignalAll(false, AwaitMethod.awaitNanos); }
|
|
public void testSignalAll_awaitNanos_fair() { testSignalAll(true, AwaitMethod.awaitNanos); }
|
|
public void testSignalAll_awaitUntil() { testSignalAll(false, AwaitMethod.awaitUntil); }
|
|
public void testSignalAll_awaitUntil_fair() { testSignalAll(true, AwaitMethod.awaitUntil); }
|
|
public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final CountDownLatch locked = new CountDownLatch(2);
|
|
final Lock writeLock = lock.writeLock();
|
|
class Awaiter extends CheckedRunnable {
|
|
public void realRun() throws InterruptedException {
|
|
writeLock.lock();
|
|
locked.countDown();
|
|
await(c, awaitMethod);
|
|
writeLock.unlock();
|
|
}
|
|
}
|
|
|
|
Thread t1 = newStartedThread(new Awaiter());
|
|
Thread t2 = newStartedThread(new Awaiter());
|
|
|
|
await(locked);
|
|
writeLock.lock();
|
|
assertHasWaiters(lock, c, t1, t2);
|
|
c.signalAll();
|
|
assertHasNoWaiters(lock, c);
|
|
writeLock.unlock();
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
}
|
|
|
|
/**
|
|
* signal wakes up waiting threads in FIFO order
|
|
*/
|
|
public void testSignalWakesFifo() { testSignalWakesFifo(false); }
|
|
public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
|
|
public void testSignalWakesFifo(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final CountDownLatch locked1 = new CountDownLatch(1);
|
|
final CountDownLatch locked2 = new CountDownLatch(1);
|
|
final Lock writeLock = lock.writeLock();
|
|
Thread t1 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
writeLock.lock();
|
|
locked1.countDown();
|
|
c.await();
|
|
writeLock.unlock();
|
|
}});
|
|
|
|
await(locked1);
|
|
|
|
Thread t2 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
writeLock.lock();
|
|
locked2.countDown();
|
|
c.await();
|
|
writeLock.unlock();
|
|
}});
|
|
|
|
await(locked2);
|
|
|
|
writeLock.lock();
|
|
assertHasWaiters(lock, c, t1, t2);
|
|
assertFalse(lock.hasQueuedThreads());
|
|
c.signal();
|
|
assertHasWaiters(lock, c, t2);
|
|
assertTrue(lock.hasQueuedThread(t1));
|
|
assertFalse(lock.hasQueuedThread(t2));
|
|
c.signal();
|
|
assertHasNoWaiters(lock, c);
|
|
assertTrue(lock.hasQueuedThread(t1));
|
|
assertTrue(lock.hasQueuedThread(t2));
|
|
writeLock.unlock();
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
}
|
|
|
|
/**
|
|
* await after multiple reentrant locking preserves lock count
|
|
*/
|
|
public void testAwaitLockCount() { testAwaitLockCount(false); }
|
|
public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
|
|
public void testAwaitLockCount(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final CountDownLatch locked = new CountDownLatch(2);
|
|
Thread t1 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
lock.writeLock().lock();
|
|
assertWriteLockedByMoi(lock);
|
|
assertEquals(1, lock.writeLock().getHoldCount());
|
|
locked.countDown();
|
|
c.await();
|
|
assertWriteLockedByMoi(lock);
|
|
assertEquals(1, lock.writeLock().getHoldCount());
|
|
lock.writeLock().unlock();
|
|
}});
|
|
|
|
Thread t2 = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
lock.writeLock().lock();
|
|
lock.writeLock().lock();
|
|
assertWriteLockedByMoi(lock);
|
|
assertEquals(2, lock.writeLock().getHoldCount());
|
|
locked.countDown();
|
|
c.await();
|
|
assertWriteLockedByMoi(lock);
|
|
assertEquals(2, lock.writeLock().getHoldCount());
|
|
lock.writeLock().unlock();
|
|
lock.writeLock().unlock();
|
|
}});
|
|
|
|
await(locked);
|
|
lock.writeLock().lock();
|
|
assertHasWaiters(lock, c, t1, t2);
|
|
c.signalAll();
|
|
assertHasNoWaiters(lock, c);
|
|
lock.writeLock().unlock();
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
}
|
|
|
|
/**
|
|
* A serialized lock deserializes as unlocked
|
|
*/
|
|
public void testSerialization() { testSerialization(false); }
|
|
public void testSerialization_fair() { testSerialization(true); }
|
|
public void testSerialization(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
lock.writeLock().lock();
|
|
lock.readLock().lock();
|
|
|
|
ReentrantReadWriteLock clone = serialClone(lock);
|
|
assertEquals(lock.isFair(), clone.isFair());
|
|
assertTrue(lock.isWriteLocked());
|
|
assertFalse(clone.isWriteLocked());
|
|
assertEquals(1, lock.getReadLockCount());
|
|
assertEquals(0, clone.getReadLockCount());
|
|
clone.writeLock().lock();
|
|
clone.readLock().lock();
|
|
assertTrue(clone.isWriteLocked());
|
|
assertEquals(1, clone.getReadLockCount());
|
|
clone.readLock().unlock();
|
|
clone.writeLock().unlock();
|
|
assertFalse(clone.isWriteLocked());
|
|
assertEquals(1, lock.getReadLockCount());
|
|
assertEquals(0, clone.getReadLockCount());
|
|
}
|
|
|
|
/**
|
|
* hasQueuedThreads reports whether there are waiting threads
|
|
*/
|
|
public void testHasQueuedThreads() { testHasQueuedThreads(false); }
|
|
public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
|
|
public void testHasQueuedThreads(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
Thread t1 = new Thread(new InterruptedLockRunnable(lock));
|
|
Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
|
|
assertFalse(lock.hasQueuedThreads());
|
|
lock.writeLock().lock();
|
|
assertFalse(lock.hasQueuedThreads());
|
|
t1.start();
|
|
waitForQueuedThread(lock, t1);
|
|
assertTrue(lock.hasQueuedThreads());
|
|
t2.start();
|
|
waitForQueuedThread(lock, t2);
|
|
assertTrue(lock.hasQueuedThreads());
|
|
t1.interrupt();
|
|
awaitTermination(t1);
|
|
assertTrue(lock.hasQueuedThreads());
|
|
lock.writeLock().unlock();
|
|
awaitTermination(t2);
|
|
assertFalse(lock.hasQueuedThreads());
|
|
}
|
|
|
|
/**
|
|
* hasQueuedThread(null) throws NPE
|
|
*/
|
|
public void testHasQueuedThreadNPE() { testHasQueuedThreadNPE(false); }
|
|
public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
|
|
public void testHasQueuedThreadNPE(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
try {
|
|
lock.hasQueuedThread(null);
|
|
shouldThrow();
|
|
} catch (NullPointerException success) {}
|
|
}
|
|
|
|
/**
|
|
* hasQueuedThread reports whether a thread is queued
|
|
*/
|
|
public void testHasQueuedThread() { testHasQueuedThread(false); }
|
|
public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
|
|
public void testHasQueuedThread(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
Thread t1 = new Thread(new InterruptedLockRunnable(lock));
|
|
Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
|
|
assertFalse(lock.hasQueuedThread(t1));
|
|
assertFalse(lock.hasQueuedThread(t2));
|
|
lock.writeLock().lock();
|
|
t1.start();
|
|
waitForQueuedThread(lock, t1);
|
|
assertTrue(lock.hasQueuedThread(t1));
|
|
assertFalse(lock.hasQueuedThread(t2));
|
|
t2.start();
|
|
waitForQueuedThread(lock, t2);
|
|
assertTrue(lock.hasQueuedThread(t1));
|
|
assertTrue(lock.hasQueuedThread(t2));
|
|
t1.interrupt();
|
|
awaitTermination(t1);
|
|
assertFalse(lock.hasQueuedThread(t1));
|
|
assertTrue(lock.hasQueuedThread(t2));
|
|
lock.writeLock().unlock();
|
|
awaitTermination(t2);
|
|
assertFalse(lock.hasQueuedThread(t1));
|
|
assertFalse(lock.hasQueuedThread(t2));
|
|
}
|
|
|
|
/**
|
|
* getQueueLength reports number of waiting threads
|
|
*/
|
|
public void testGetQueueLength() { testGetQueueLength(false); }
|
|
public void testGetQueueLength_fair() { testGetQueueLength(true); }
|
|
public void testGetQueueLength(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
Thread t1 = new Thread(new InterruptedLockRunnable(lock));
|
|
Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
|
|
assertEquals(0, lock.getQueueLength());
|
|
lock.writeLock().lock();
|
|
t1.start();
|
|
waitForQueuedThread(lock, t1);
|
|
assertEquals(1, lock.getQueueLength());
|
|
t2.start();
|
|
waitForQueuedThread(lock, t2);
|
|
assertEquals(2, lock.getQueueLength());
|
|
t1.interrupt();
|
|
awaitTermination(t1);
|
|
assertEquals(1, lock.getQueueLength());
|
|
lock.writeLock().unlock();
|
|
awaitTermination(t2);
|
|
assertEquals(0, lock.getQueueLength());
|
|
}
|
|
|
|
/**
|
|
* getQueuedThreads includes waiting threads
|
|
*/
|
|
public void testGetQueuedThreads() { testGetQueuedThreads(false); }
|
|
public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
|
|
public void testGetQueuedThreads(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
Thread t1 = new Thread(new InterruptedLockRunnable(lock));
|
|
Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
|
|
assertTrue(lock.getQueuedThreads().isEmpty());
|
|
lock.writeLock().lock();
|
|
assertTrue(lock.getQueuedThreads().isEmpty());
|
|
t1.start();
|
|
waitForQueuedThread(lock, t1);
|
|
assertEquals(1, lock.getQueuedThreads().size());
|
|
assertTrue(lock.getQueuedThreads().contains(t1));
|
|
t2.start();
|
|
waitForQueuedThread(lock, t2);
|
|
assertEquals(2, lock.getQueuedThreads().size());
|
|
assertTrue(lock.getQueuedThreads().contains(t1));
|
|
assertTrue(lock.getQueuedThreads().contains(t2));
|
|
t1.interrupt();
|
|
awaitTermination(t1);
|
|
assertFalse(lock.getQueuedThreads().contains(t1));
|
|
assertTrue(lock.getQueuedThreads().contains(t2));
|
|
assertEquals(1, lock.getQueuedThreads().size());
|
|
lock.writeLock().unlock();
|
|
awaitTermination(t2);
|
|
assertTrue(lock.getQueuedThreads().isEmpty());
|
|
}
|
|
|
|
/**
|
|
* hasWaiters throws NPE if null
|
|
*/
|
|
public void testHasWaitersNPE() { testHasWaitersNPE(false); }
|
|
public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
|
|
public void testHasWaitersNPE(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
try {
|
|
lock.hasWaiters(null);
|
|
shouldThrow();
|
|
} catch (NullPointerException success) {}
|
|
}
|
|
|
|
/**
|
|
* getWaitQueueLength throws NPE if null
|
|
*/
|
|
public void testGetWaitQueueLengthNPE() { testGetWaitQueueLengthNPE(false); }
|
|
public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
|
|
public void testGetWaitQueueLengthNPE(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
try {
|
|
lock.getWaitQueueLength(null);
|
|
shouldThrow();
|
|
} catch (NullPointerException success) {}
|
|
}
|
|
|
|
/**
|
|
* getWaitingThreads throws NPE if null
|
|
*/
|
|
public void testGetWaitingThreadsNPE() { testGetWaitingThreadsNPE(false); }
|
|
public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
|
|
public void testGetWaitingThreadsNPE(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
|
|
try {
|
|
lock.getWaitingThreads(null);
|
|
shouldThrow();
|
|
} catch (NullPointerException success) {}
|
|
}
|
|
|
|
/**
|
|
* hasWaiters throws IllegalArgumentException if not owned
|
|
*/
|
|
public void testHasWaitersIAE() { testHasWaitersIAE(false); }
|
|
public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
|
|
public void testHasWaitersIAE(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
|
|
try {
|
|
lock2.hasWaiters(c);
|
|
shouldThrow();
|
|
} catch (IllegalArgumentException success) {}
|
|
}
|
|
|
|
/**
|
|
* hasWaiters throws IllegalMonitorStateException if not locked
|
|
*/
|
|
public void testHasWaitersIMSE() { testHasWaitersIMSE(false); }
|
|
public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
|
|
public void testHasWaitersIMSE(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
try {
|
|
lock.hasWaiters(c);
|
|
shouldThrow();
|
|
} catch (IllegalMonitorStateException success) {}
|
|
}
|
|
|
|
/**
|
|
* getWaitQueueLength throws IllegalArgumentException if not owned
|
|
*/
|
|
public void testGetWaitQueueLengthIAE() { testGetWaitQueueLengthIAE(false); }
|
|
public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
|
|
public void testGetWaitQueueLengthIAE(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
|
|
try {
|
|
lock2.getWaitQueueLength(c);
|
|
shouldThrow();
|
|
} catch (IllegalArgumentException success) {}
|
|
}
|
|
|
|
/**
|
|
* getWaitQueueLength throws IllegalMonitorStateException if not locked
|
|
*/
|
|
public void testGetWaitQueueLengthIMSE() { testGetWaitQueueLengthIMSE(false); }
|
|
public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
|
|
public void testGetWaitQueueLengthIMSE(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
try {
|
|
lock.getWaitQueueLength(c);
|
|
shouldThrow();
|
|
} catch (IllegalMonitorStateException success) {}
|
|
}
|
|
|
|
/**
|
|
* getWaitingThreads throws IllegalArgumentException if not owned
|
|
*/
|
|
public void testGetWaitingThreadsIAE() { testGetWaitingThreadsIAE(false); }
|
|
public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
|
|
public void testGetWaitingThreadsIAE(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final PublicReentrantReadWriteLock lock2 =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
try {
|
|
lock2.getWaitingThreads(c);
|
|
shouldThrow();
|
|
} catch (IllegalArgumentException success) {}
|
|
}
|
|
|
|
/**
|
|
* getWaitingThreads throws IllegalMonitorStateException if not locked
|
|
*/
|
|
public void testGetWaitingThreadsIMSE() { testGetWaitingThreadsIMSE(false); }
|
|
public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
|
|
public void testGetWaitingThreadsIMSE(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
try {
|
|
lock.getWaitingThreads(c);
|
|
shouldThrow();
|
|
} catch (IllegalMonitorStateException success) {}
|
|
}
|
|
|
|
/**
|
|
* hasWaiters returns true when a thread is waiting, else false
|
|
*/
|
|
public void testHasWaiters() { testHasWaiters(false); }
|
|
public void testHasWaiters_fair() { testHasWaiters(true); }
|
|
public void testHasWaiters(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final CountDownLatch locked = new CountDownLatch(1);
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
lock.writeLock().lock();
|
|
assertHasNoWaiters(lock, c);
|
|
assertFalse(lock.hasWaiters(c));
|
|
locked.countDown();
|
|
c.await();
|
|
assertHasNoWaiters(lock, c);
|
|
assertFalse(lock.hasWaiters(c));
|
|
lock.writeLock().unlock();
|
|
}});
|
|
|
|
await(locked);
|
|
lock.writeLock().lock();
|
|
assertHasWaiters(lock, c, t);
|
|
assertTrue(lock.hasWaiters(c));
|
|
c.signal();
|
|
assertHasNoWaiters(lock, c);
|
|
assertFalse(lock.hasWaiters(c));
|
|
lock.writeLock().unlock();
|
|
awaitTermination(t);
|
|
assertHasNoWaiters(lock, c);
|
|
}
|
|
|
|
/**
|
|
* getWaitQueueLength returns number of waiting threads
|
|
*/
|
|
public void testGetWaitQueueLength() { testGetWaitQueueLength(false); }
|
|
public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
|
|
public void testGetWaitQueueLength(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final CountDownLatch locked = new CountDownLatch(1);
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
lock.writeLock().lock();
|
|
assertEquals(0, lock.getWaitQueueLength(c));
|
|
locked.countDown();
|
|
c.await();
|
|
lock.writeLock().unlock();
|
|
}});
|
|
|
|
await(locked);
|
|
lock.writeLock().lock();
|
|
assertHasWaiters(lock, c, t);
|
|
assertEquals(1, lock.getWaitQueueLength(c));
|
|
c.signal();
|
|
assertHasNoWaiters(lock, c);
|
|
assertEquals(0, lock.getWaitQueueLength(c));
|
|
lock.writeLock().unlock();
|
|
awaitTermination(t);
|
|
}
|
|
|
|
/**
|
|
* getWaitingThreads returns only and all waiting threads
|
|
*/
|
|
public void testGetWaitingThreads() { testGetWaitingThreads(false); }
|
|
public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
|
|
public void testGetWaitingThreads(boolean fair) {
|
|
final PublicReentrantReadWriteLock lock =
|
|
new PublicReentrantReadWriteLock(fair);
|
|
final Condition c = lock.writeLock().newCondition();
|
|
final CountDownLatch locked1 = new CountDownLatch(1);
|
|
final CountDownLatch locked2 = new CountDownLatch(1);
|
|
Thread t1 = new Thread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
lock.writeLock().lock();
|
|
assertTrue(lock.getWaitingThreads(c).isEmpty());
|
|
locked1.countDown();
|
|
c.await();
|
|
lock.writeLock().unlock();
|
|
}});
|
|
|
|
Thread t2 = new Thread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
lock.writeLock().lock();
|
|
assertFalse(lock.getWaitingThreads(c).isEmpty());
|
|
locked2.countDown();
|
|
c.await();
|
|
lock.writeLock().unlock();
|
|
}});
|
|
|
|
lock.writeLock().lock();
|
|
assertTrue(lock.getWaitingThreads(c).isEmpty());
|
|
lock.writeLock().unlock();
|
|
|
|
t1.start();
|
|
await(locked1);
|
|
t2.start();
|
|
await(locked2);
|
|
|
|
lock.writeLock().lock();
|
|
assertTrue(lock.hasWaiters(c));
|
|
assertTrue(lock.getWaitingThreads(c).contains(t1));
|
|
assertTrue(lock.getWaitingThreads(c).contains(t2));
|
|
assertEquals(2, lock.getWaitingThreads(c).size());
|
|
c.signalAll();
|
|
assertHasNoWaiters(lock, c);
|
|
lock.writeLock().unlock();
|
|
|
|
awaitTermination(t1);
|
|
awaitTermination(t2);
|
|
|
|
assertHasNoWaiters(lock, c);
|
|
}
|
|
|
|
/**
|
|
* toString indicates current lock state
|
|
*/
|
|
public void testToString() { testToString(false); }
|
|
public void testToString_fair() { testToString(true); }
|
|
public void testToString(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
assertTrue(lock.toString().contains("Write locks = 0"));
|
|
assertTrue(lock.toString().contains("Read locks = 0"));
|
|
lock.writeLock().lock();
|
|
assertTrue(lock.toString().contains("Write locks = 1"));
|
|
assertTrue(lock.toString().contains("Read locks = 0"));
|
|
lock.writeLock().lock();
|
|
assertTrue(lock.toString().contains("Write locks = 2"));
|
|
assertTrue(lock.toString().contains("Read locks = 0"));
|
|
lock.writeLock().unlock();
|
|
lock.writeLock().unlock();
|
|
lock.readLock().lock();
|
|
assertTrue(lock.toString().contains("Write locks = 0"));
|
|
assertTrue(lock.toString().contains("Read locks = 1"));
|
|
lock.readLock().lock();
|
|
assertTrue(lock.toString().contains("Write locks = 0"));
|
|
assertTrue(lock.toString().contains("Read locks = 2"));
|
|
}
|
|
|
|
/**
|
|
* readLock.toString indicates current lock state
|
|
*/
|
|
public void testReadLockToString() { testReadLockToString(false); }
|
|
public void testReadLockToString_fair() { testReadLockToString(true); }
|
|
public void testReadLockToString(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
assertTrue(lock.readLock().toString().contains("Read locks = 0"));
|
|
lock.readLock().lock();
|
|
assertTrue(lock.readLock().toString().contains("Read locks = 1"));
|
|
lock.readLock().lock();
|
|
assertTrue(lock.readLock().toString().contains("Read locks = 2"));
|
|
lock.readLock().unlock();
|
|
assertTrue(lock.readLock().toString().contains("Read locks = 1"));
|
|
lock.readLock().unlock();
|
|
assertTrue(lock.readLock().toString().contains("Read locks = 0"));
|
|
}
|
|
|
|
/**
|
|
* writeLock.toString indicates current lock state
|
|
*/
|
|
public void testWriteLockToString() { testWriteLockToString(false); }
|
|
public void testWriteLockToString_fair() { testWriteLockToString(true); }
|
|
public void testWriteLockToString(boolean fair) {
|
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
|
|
assertTrue(lock.writeLock().toString().contains("Unlocked"));
|
|
lock.writeLock().lock();
|
|
assertTrue(lock.writeLock().toString().contains("Locked by"));
|
|
lock.writeLock().unlock();
|
|
assertTrue(lock.writeLock().toString().contains("Unlocked"));
|
|
}
|
|
|
|
/**
|
|
* ThreadMXBean reports the blockers that we expect.
|
|
*/
|
|
public void testBlockers() {
|
|
if (!testImplementationDetails) return;
|
|
final boolean fair = randomBoolean();
|
|
final boolean timedAcquire = randomBoolean();
|
|
final boolean timedAwait = randomBoolean();
|
|
final String syncClassName = fair
|
|
? "ReentrantReadWriteLock$FairSync"
|
|
: "ReentrantReadWriteLock$NonfairSync";
|
|
final String conditionClassName
|
|
= "AbstractQueuedSynchronizer$ConditionObject";
|
|
final Thread.State expectedAcquireState = timedAcquire
|
|
? Thread.State.TIMED_WAITING
|
|
: Thread.State.WAITING;
|
|
final Thread.State expectedAwaitState = timedAwait
|
|
? Thread.State.TIMED_WAITING
|
|
: Thread.State.WAITING;
|
|
final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
|
|
final Condition condition = lock.newCondition();
|
|
final AtomicBoolean conditionSatisfied = new AtomicBoolean(false);
|
|
lock.lock();
|
|
final Thread thread = newStartedThread((Action) () -> {
|
|
if (timedAcquire)
|
|
lock.tryLock(LONGER_DELAY_MS, MILLISECONDS);
|
|
else
|
|
lock.lock();
|
|
while (!conditionSatisfied.get())
|
|
if (timedAwait)
|
|
condition.await(LONGER_DELAY_MS, MILLISECONDS);
|
|
else
|
|
condition.await();
|
|
});
|
|
Callable<Boolean> waitingForLock = () -> {
|
|
String className;
|
|
return thread.getState() == expectedAcquireState
|
|
&& (className = blockerClassName(thread)) != null
|
|
&& className.endsWith(syncClassName);
|
|
};
|
|
waitForThreadToEnterWaitState(thread, waitingForLock);
|
|
|
|
lock.unlock();
|
|
Callable<Boolean> waitingForCondition = () -> {
|
|
String className;
|
|
return thread.getState() == expectedAwaitState
|
|
&& (className = blockerClassName(thread)) != null
|
|
&& className.endsWith(conditionClassName);
|
|
};
|
|
waitForThreadToEnterWaitState(thread, waitingForCondition);
|
|
|
|
// politely release the waiter
|
|
conditionSatisfied.set(true);
|
|
lock.lock();
|
|
try {
|
|
condition.signal();
|
|
} finally { lock.unlock(); }
|
|
|
|
awaitTermination(thread);
|
|
}
|
|
}
|