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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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|
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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|
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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.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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|
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import junit.framework.AssertionFailedError; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class ReentrantReadWriteLockTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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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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/** |
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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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/** |
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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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/** |
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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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/** |
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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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/** |
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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 AssertionFailedError("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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/** |
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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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/** |
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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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/** |
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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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/** |
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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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/** |
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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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|
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enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil } |
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|
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/** |
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* Awaits condition 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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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(2 * LONG_DELAY_MS, MILLISECONDS)); |
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break; |
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case awaitNanos: |
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long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS)); |
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assertTrue(nanosRemaining > 0); |
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break; |
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case awaitUntil: |
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java.util.Date d = new java.util.Date(); |
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assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS))); |
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break; |
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} |
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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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|
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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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|
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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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|
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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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/** |
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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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/** |
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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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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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/** |
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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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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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/** |
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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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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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/** |
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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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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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/** |
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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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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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/** |
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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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|
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waitForQueuedThread(lock, t); |
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t.interrupt(); |
317 |
awaitTermination(t); |
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releaseWriteLock(lock); |
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} |
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|
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/** |
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* timed write-tryLock is interruptible |
323 |
*/ |
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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 { |
332 |
lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS); |
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}}); |
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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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/** |
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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 { |
352 |
lock.readLock().lockInterruptibly(); |
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}}); |
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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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/** |
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* timed read-tryLock is interruptible |
363 |
*/ |
364 |
public void testReadTryLock_Interruptible() { testReadTryLock_Interruptible(false); } |
365 |
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); |
369 |
lock.writeLock().lock(); |
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Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
371 |
public void realRun() throws InterruptedException { |
372 |
lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS); |
373 |
}}); |
374 |
|
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waitForQueuedThread(lock, t); |
376 |
t.interrupt(); |
377 |
awaitTermination(t); |
378 |
releaseWriteLock(lock); |
379 |
} |
380 |
|
381 |
/** |
382 |
* write-tryLock on an unlocked lock succeeds |
383 |
*/ |
384 |
public void testWriteTryLock() { testWriteTryLock(false); } |
385 |
public void testWriteTryLock_fair() { testWriteTryLock(true); } |
386 |
public void testWriteTryLock(boolean fair) { |
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final PublicReentrantReadWriteLock lock = |
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new PublicReentrantReadWriteLock(fair); |
389 |
assertTrue(lock.writeLock().tryLock()); |
390 |
assertWriteLockedByMoi(lock); |
391 |
assertTrue(lock.writeLock().tryLock()); |
392 |
assertWriteLockedByMoi(lock); |
393 |
lock.writeLock().unlock(); |
394 |
releaseWriteLock(lock); |
395 |
} |
396 |
|
397 |
/** |
398 |
* write-tryLock fails if locked |
399 |
*/ |
400 |
public void testWriteTryLockWhenLocked() { testWriteTryLockWhenLocked(false); } |
401 |
public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); } |
402 |
public void testWriteTryLockWhenLocked(boolean fair) { |
403 |
final PublicReentrantReadWriteLock lock = |
404 |
new PublicReentrantReadWriteLock(fair); |
405 |
lock.writeLock().lock(); |
406 |
Thread t = newStartedThread(new CheckedRunnable() { |
407 |
public void realRun() { |
408 |
assertFalse(lock.writeLock().tryLock()); |
409 |
}}); |
410 |
|
411 |
awaitTermination(t); |
412 |
releaseWriteLock(lock); |
413 |
} |
414 |
|
415 |
/** |
416 |
* read-tryLock fails if locked |
417 |
*/ |
418 |
public void testReadTryLockWhenLocked() { testReadTryLockWhenLocked(false); } |
419 |
public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); } |
420 |
public void testReadTryLockWhenLocked(boolean fair) { |
421 |
final PublicReentrantReadWriteLock lock = |
422 |
new PublicReentrantReadWriteLock(fair); |
423 |
lock.writeLock().lock(); |
424 |
Thread t = newStartedThread(new CheckedRunnable() { |
425 |
public void realRun() { |
426 |
assertFalse(lock.readLock().tryLock()); |
427 |
}}); |
428 |
|
429 |
awaitTermination(t); |
430 |
releaseWriteLock(lock); |
431 |
} |
432 |
|
433 |
/** |
434 |
* Multiple threads can hold a read lock when not write-locked |
435 |
*/ |
436 |
public void testMultipleReadLocks() { testMultipleReadLocks(false); } |
437 |
public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); } |
438 |
public void testMultipleReadLocks(boolean fair) { |
439 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
440 |
lock.readLock().lock(); |
441 |
Thread t = newStartedThread(new CheckedRunnable() { |
442 |
public void realRun() throws InterruptedException { |
443 |
assertTrue(lock.readLock().tryLock()); |
444 |
lock.readLock().unlock(); |
445 |
assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS)); |
446 |
lock.readLock().unlock(); |
447 |
lock.readLock().lock(); |
448 |
lock.readLock().unlock(); |
449 |
}}); |
450 |
|
451 |
awaitTermination(t); |
452 |
lock.readLock().unlock(); |
453 |
} |
454 |
|
455 |
/** |
456 |
* A writelock succeeds only after a reading thread unlocks |
457 |
*/ |
458 |
public void testWriteAfterReadLock() { testWriteAfterReadLock(false); } |
459 |
public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); } |
460 |
public void testWriteAfterReadLock(boolean fair) { |
461 |
final PublicReentrantReadWriteLock lock = |
462 |
new PublicReentrantReadWriteLock(fair); |
463 |
lock.readLock().lock(); |
464 |
Thread t = newStartedThread(new CheckedRunnable() { |
465 |
public void realRun() { |
466 |
assertEquals(1, lock.getReadLockCount()); |
467 |
lock.writeLock().lock(); |
468 |
assertEquals(0, lock.getReadLockCount()); |
469 |
lock.writeLock().unlock(); |
470 |
}}); |
471 |
waitForQueuedThread(lock, t); |
472 |
assertNotWriteLocked(lock); |
473 |
assertEquals(1, lock.getReadLockCount()); |
474 |
lock.readLock().unlock(); |
475 |
assertEquals(0, lock.getReadLockCount()); |
476 |
awaitTermination(t); |
477 |
assertNotWriteLocked(lock); |
478 |
} |
479 |
|
480 |
/** |
481 |
* A writelock succeeds only after reading threads unlock |
482 |
*/ |
483 |
public void testWriteAfterMultipleReadLocks() { testWriteAfterMultipleReadLocks(false); } |
484 |
public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); } |
485 |
public void testWriteAfterMultipleReadLocks(boolean fair) { |
486 |
final PublicReentrantReadWriteLock lock = |
487 |
new PublicReentrantReadWriteLock(fair); |
488 |
lock.readLock().lock(); |
489 |
lock.readLock().lock(); |
490 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
491 |
public void realRun() { |
492 |
lock.readLock().lock(); |
493 |
assertEquals(3, lock.getReadLockCount()); |
494 |
lock.readLock().unlock(); |
495 |
}}); |
496 |
awaitTermination(t1); |
497 |
|
498 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
499 |
public void realRun() { |
500 |
assertEquals(2, lock.getReadLockCount()); |
501 |
lock.writeLock().lock(); |
502 |
assertEquals(0, lock.getReadLockCount()); |
503 |
lock.writeLock().unlock(); |
504 |
}}); |
505 |
waitForQueuedThread(lock, t2); |
506 |
assertNotWriteLocked(lock); |
507 |
assertEquals(2, lock.getReadLockCount()); |
508 |
lock.readLock().unlock(); |
509 |
lock.readLock().unlock(); |
510 |
assertEquals(0, lock.getReadLockCount()); |
511 |
awaitTermination(t2); |
512 |
assertNotWriteLocked(lock); |
513 |
} |
514 |
|
515 |
/** |
516 |
* A thread that tries to acquire a fair read lock (non-reentrantly) |
517 |
* will block if there is a waiting writer thread |
518 |
*/ |
519 |
public void testReaderWriterReaderFairFifo() { |
520 |
final PublicReentrantReadWriteLock lock = |
521 |
new PublicReentrantReadWriteLock(true); |
522 |
final AtomicBoolean t1GotLock = new AtomicBoolean(false); |
523 |
|
524 |
lock.readLock().lock(); |
525 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
526 |
public void realRun() { |
527 |
assertEquals(1, lock.getReadLockCount()); |
528 |
lock.writeLock().lock(); |
529 |
assertEquals(0, lock.getReadLockCount()); |
530 |
t1GotLock.set(true); |
531 |
lock.writeLock().unlock(); |
532 |
}}); |
533 |
waitForQueuedThread(lock, t1); |
534 |
|
535 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
536 |
public void realRun() { |
537 |
assertEquals(1, lock.getReadLockCount()); |
538 |
lock.readLock().lock(); |
539 |
assertEquals(1, lock.getReadLockCount()); |
540 |
assertTrue(t1GotLock.get()); |
541 |
lock.readLock().unlock(); |
542 |
}}); |
543 |
waitForQueuedThread(lock, t2); |
544 |
assertTrue(t1.isAlive()); |
545 |
assertNotWriteLocked(lock); |
546 |
assertEquals(1, lock.getReadLockCount()); |
547 |
lock.readLock().unlock(); |
548 |
awaitTermination(t1); |
549 |
awaitTermination(t2); |
550 |
assertNotWriteLocked(lock); |
551 |
} |
552 |
|
553 |
/** |
554 |
* Readlocks succeed only after a writing thread unlocks |
555 |
*/ |
556 |
public void testReadAfterWriteLock() { testReadAfterWriteLock(false); } |
557 |
public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); } |
558 |
public void testReadAfterWriteLock(boolean fair) { |
559 |
final PublicReentrantReadWriteLock lock = |
560 |
new PublicReentrantReadWriteLock(fair); |
561 |
lock.writeLock().lock(); |
562 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
563 |
public void realRun() { |
564 |
lock.readLock().lock(); |
565 |
lock.readLock().unlock(); |
566 |
}}); |
567 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
568 |
public void realRun() { |
569 |
lock.readLock().lock(); |
570 |
lock.readLock().unlock(); |
571 |
}}); |
572 |
|
573 |
waitForQueuedThread(lock, t1); |
574 |
waitForQueuedThread(lock, t2); |
575 |
releaseWriteLock(lock); |
576 |
awaitTermination(t1); |
577 |
awaitTermination(t2); |
578 |
} |
579 |
|
580 |
/** |
581 |
* Read trylock succeeds if write locked by current thread |
582 |
*/ |
583 |
public void testReadHoldingWriteLock() { testReadHoldingWriteLock(false); } |
584 |
public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); } |
585 |
public void testReadHoldingWriteLock(boolean fair) { |
586 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
587 |
lock.writeLock().lock(); |
588 |
assertTrue(lock.readLock().tryLock()); |
589 |
lock.readLock().unlock(); |
590 |
lock.writeLock().unlock(); |
591 |
} |
592 |
|
593 |
/** |
594 |
* Read trylock succeeds (barging) even in the presence of waiting |
595 |
* readers and/or writers |
596 |
*/ |
597 |
public void testReadTryLockBarging() { testReadTryLockBarging(false); } |
598 |
public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); } |
599 |
public void testReadTryLockBarging(boolean fair) { |
600 |
final PublicReentrantReadWriteLock lock = |
601 |
new PublicReentrantReadWriteLock(fair); |
602 |
lock.readLock().lock(); |
603 |
|
604 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
605 |
public void realRun() { |
606 |
lock.writeLock().lock(); |
607 |
lock.writeLock().unlock(); |
608 |
}}); |
609 |
|
610 |
waitForQueuedThread(lock, t1); |
611 |
|
612 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
613 |
public void realRun() { |
614 |
lock.readLock().lock(); |
615 |
lock.readLock().unlock(); |
616 |
}}); |
617 |
|
618 |
if (fair) |
619 |
waitForQueuedThread(lock, t2); |
620 |
|
621 |
Thread t3 = newStartedThread(new CheckedRunnable() { |
622 |
public void realRun() { |
623 |
lock.readLock().tryLock(); |
624 |
lock.readLock().unlock(); |
625 |
}}); |
626 |
|
627 |
assertTrue(lock.getReadLockCount() > 0); |
628 |
awaitTermination(t3); |
629 |
assertTrue(t1.isAlive()); |
630 |
if (fair) assertTrue(t2.isAlive()); |
631 |
lock.readLock().unlock(); |
632 |
awaitTermination(t1); |
633 |
awaitTermination(t2); |
634 |
} |
635 |
|
636 |
/** |
637 |
* Read lock succeeds if write locked by current thread even if |
638 |
* other threads are waiting for readlock |
639 |
*/ |
640 |
public void testReadHoldingWriteLock2() { testReadHoldingWriteLock2(false); } |
641 |
public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); } |
642 |
public void testReadHoldingWriteLock2(boolean fair) { |
643 |
final PublicReentrantReadWriteLock lock = |
644 |
new PublicReentrantReadWriteLock(fair); |
645 |
lock.writeLock().lock(); |
646 |
lock.readLock().lock(); |
647 |
lock.readLock().unlock(); |
648 |
|
649 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
650 |
public void realRun() { |
651 |
lock.readLock().lock(); |
652 |
lock.readLock().unlock(); |
653 |
}}); |
654 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
655 |
public void realRun() { |
656 |
lock.readLock().lock(); |
657 |
lock.readLock().unlock(); |
658 |
}}); |
659 |
|
660 |
waitForQueuedThread(lock, t1); |
661 |
waitForQueuedThread(lock, t2); |
662 |
assertWriteLockedByMoi(lock); |
663 |
lock.readLock().lock(); |
664 |
lock.readLock().unlock(); |
665 |
releaseWriteLock(lock); |
666 |
awaitTermination(t1); |
667 |
awaitTermination(t2); |
668 |
} |
669 |
|
670 |
/** |
671 |
* Read lock succeeds if write locked by current thread even if |
672 |
* other threads are waiting for writelock |
673 |
*/ |
674 |
public void testReadHoldingWriteLock3() { testReadHoldingWriteLock3(false); } |
675 |
public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); } |
676 |
public void testReadHoldingWriteLock3(boolean fair) { |
677 |
final PublicReentrantReadWriteLock lock = |
678 |
new PublicReentrantReadWriteLock(fair); |
679 |
lock.writeLock().lock(); |
680 |
lock.readLock().lock(); |
681 |
lock.readLock().unlock(); |
682 |
|
683 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
684 |
public void realRun() { |
685 |
lock.writeLock().lock(); |
686 |
lock.writeLock().unlock(); |
687 |
}}); |
688 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
689 |
public void realRun() { |
690 |
lock.writeLock().lock(); |
691 |
lock.writeLock().unlock(); |
692 |
}}); |
693 |
|
694 |
waitForQueuedThread(lock, t1); |
695 |
waitForQueuedThread(lock, t2); |
696 |
assertWriteLockedByMoi(lock); |
697 |
lock.readLock().lock(); |
698 |
lock.readLock().unlock(); |
699 |
assertWriteLockedByMoi(lock); |
700 |
lock.writeLock().unlock(); |
701 |
awaitTermination(t1); |
702 |
awaitTermination(t2); |
703 |
} |
704 |
|
705 |
/** |
706 |
* Write lock succeeds if write locked by current thread even if |
707 |
* other threads are waiting for writelock |
708 |
*/ |
709 |
public void testWriteHoldingWriteLock4() { testWriteHoldingWriteLock4(false); } |
710 |
public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); } |
711 |
public void testWriteHoldingWriteLock4(boolean fair) { |
712 |
final PublicReentrantReadWriteLock lock = |
713 |
new PublicReentrantReadWriteLock(fair); |
714 |
lock.writeLock().lock(); |
715 |
lock.writeLock().lock(); |
716 |
lock.writeLock().unlock(); |
717 |
|
718 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
719 |
public void realRun() { |
720 |
lock.writeLock().lock(); |
721 |
lock.writeLock().unlock(); |
722 |
}}); |
723 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
724 |
public void realRun() { |
725 |
lock.writeLock().lock(); |
726 |
lock.writeLock().unlock(); |
727 |
}}); |
728 |
|
729 |
waitForQueuedThread(lock, t1); |
730 |
waitForQueuedThread(lock, t2); |
731 |
assertWriteLockedByMoi(lock); |
732 |
assertEquals(1, lock.getWriteHoldCount()); |
733 |
lock.writeLock().lock(); |
734 |
assertWriteLockedByMoi(lock); |
735 |
assertEquals(2, lock.getWriteHoldCount()); |
736 |
lock.writeLock().unlock(); |
737 |
assertWriteLockedByMoi(lock); |
738 |
assertEquals(1, lock.getWriteHoldCount()); |
739 |
lock.writeLock().unlock(); |
740 |
awaitTermination(t1); |
741 |
awaitTermination(t2); |
742 |
} |
743 |
|
744 |
/** |
745 |
* Read tryLock succeeds if readlocked but not writelocked |
746 |
*/ |
747 |
public void testTryLockWhenReadLocked() { testTryLockWhenReadLocked(false); } |
748 |
public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); } |
749 |
public void testTryLockWhenReadLocked(boolean fair) { |
750 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
751 |
lock.readLock().lock(); |
752 |
Thread t = newStartedThread(new CheckedRunnable() { |
753 |
public void realRun() { |
754 |
assertTrue(lock.readLock().tryLock()); |
755 |
lock.readLock().unlock(); |
756 |
}}); |
757 |
|
758 |
awaitTermination(t); |
759 |
lock.readLock().unlock(); |
760 |
} |
761 |
|
762 |
/** |
763 |
* write tryLock fails when readlocked |
764 |
*/ |
765 |
public void testWriteTryLockWhenReadLocked() { testWriteTryLockWhenReadLocked(false); } |
766 |
public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); } |
767 |
public void testWriteTryLockWhenReadLocked(boolean fair) { |
768 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
769 |
lock.readLock().lock(); |
770 |
Thread t = newStartedThread(new CheckedRunnable() { |
771 |
public void realRun() { |
772 |
assertFalse(lock.writeLock().tryLock()); |
773 |
}}); |
774 |
|
775 |
awaitTermination(t); |
776 |
lock.readLock().unlock(); |
777 |
} |
778 |
|
779 |
/** |
780 |
* write timed tryLock times out if locked |
781 |
*/ |
782 |
public void testWriteTryLock_Timeout() { testWriteTryLock_Timeout(false); } |
783 |
public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); } |
784 |
public void testWriteTryLock_Timeout(boolean fair) { |
785 |
final PublicReentrantReadWriteLock lock = |
786 |
new PublicReentrantReadWriteLock(fair); |
787 |
lock.writeLock().lock(); |
788 |
Thread t = newStartedThread(new CheckedRunnable() { |
789 |
public void realRun() throws InterruptedException { |
790 |
long startTime = System.nanoTime(); |
791 |
long timeoutMillis = 10; |
792 |
assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS)); |
793 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
794 |
}}); |
795 |
|
796 |
awaitTermination(t); |
797 |
releaseWriteLock(lock); |
798 |
} |
799 |
|
800 |
/** |
801 |
* read timed tryLock times out if write-locked |
802 |
*/ |
803 |
public void testReadTryLock_Timeout() { testReadTryLock_Timeout(false); } |
804 |
public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); } |
805 |
public void testReadTryLock_Timeout(boolean fair) { |
806 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
807 |
lock.writeLock().lock(); |
808 |
Thread t = newStartedThread(new CheckedRunnable() { |
809 |
public void realRun() throws InterruptedException { |
810 |
long startTime = System.nanoTime(); |
811 |
long timeoutMillis = 10; |
812 |
assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS)); |
813 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
814 |
}}); |
815 |
|
816 |
awaitTermination(t); |
817 |
assertTrue(lock.writeLock().isHeldByCurrentThread()); |
818 |
lock.writeLock().unlock(); |
819 |
} |
820 |
|
821 |
/** |
822 |
* write lockInterruptibly succeeds if unlocked, else is interruptible |
823 |
*/ |
824 |
public void testWriteLockInterruptibly() { testWriteLockInterruptibly(false); } |
825 |
public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); } |
826 |
public void testWriteLockInterruptibly(boolean fair) { |
827 |
final PublicReentrantReadWriteLock lock = |
828 |
new PublicReentrantReadWriteLock(fair); |
829 |
try { |
830 |
lock.writeLock().lockInterruptibly(); |
831 |
} catch (InterruptedException ie) { |
832 |
threadUnexpectedException(ie); |
833 |
} |
834 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
835 |
public void realRun() throws InterruptedException { |
836 |
lock.writeLock().lockInterruptibly(); |
837 |
}}); |
838 |
|
839 |
waitForQueuedThread(lock, t); |
840 |
t.interrupt(); |
841 |
assertTrue(lock.writeLock().isHeldByCurrentThread()); |
842 |
awaitTermination(t); |
843 |
releaseWriteLock(lock); |
844 |
} |
845 |
|
846 |
/** |
847 |
* read lockInterruptibly succeeds if lock free else is interruptible |
848 |
*/ |
849 |
public void testReadLockInterruptibly() { testReadLockInterruptibly(false); } |
850 |
public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); } |
851 |
public void testReadLockInterruptibly(boolean fair) { |
852 |
final PublicReentrantReadWriteLock lock = |
853 |
new PublicReentrantReadWriteLock(fair); |
854 |
try { |
855 |
lock.readLock().lockInterruptibly(); |
856 |
lock.readLock().unlock(); |
857 |
lock.writeLock().lockInterruptibly(); |
858 |
} catch (InterruptedException ie) { |
859 |
threadUnexpectedException(ie); |
860 |
} |
861 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
862 |
public void realRun() throws InterruptedException { |
863 |
lock.readLock().lockInterruptibly(); |
864 |
}}); |
865 |
|
866 |
waitForQueuedThread(lock, t); |
867 |
t.interrupt(); |
868 |
awaitTermination(t); |
869 |
releaseWriteLock(lock); |
870 |
} |
871 |
|
872 |
/** |
873 |
* Calling await without holding lock throws IllegalMonitorStateException |
874 |
*/ |
875 |
public void testAwait_IMSE() { testAwait_IMSE(false); } |
876 |
public void testAwait_IMSE_fair() { testAwait_IMSE(true); } |
877 |
public void testAwait_IMSE(boolean fair) { |
878 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
879 |
final Condition c = lock.writeLock().newCondition(); |
880 |
for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
881 |
long startTime = System.nanoTime(); |
882 |
try { |
883 |
await(c, awaitMethod); |
884 |
shouldThrow(); |
885 |
} catch (IllegalMonitorStateException success) { |
886 |
} catch (InterruptedException e) { threadUnexpectedException(e); } |
887 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
888 |
} |
889 |
} |
890 |
|
891 |
/** |
892 |
* Calling signal without holding lock throws IllegalMonitorStateException |
893 |
*/ |
894 |
public void testSignal_IMSE() { testSignal_IMSE(false); } |
895 |
public void testSignal_IMSE_fair() { testSignal_IMSE(true); } |
896 |
public void testSignal_IMSE(boolean fair) { |
897 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
898 |
final Condition c = lock.writeLock().newCondition(); |
899 |
try { |
900 |
c.signal(); |
901 |
shouldThrow(); |
902 |
} catch (IllegalMonitorStateException success) {} |
903 |
} |
904 |
|
905 |
/** |
906 |
* Calling signalAll without holding lock throws IllegalMonitorStateException |
907 |
*/ |
908 |
public void testSignalAll_IMSE() { testSignalAll_IMSE(false); } |
909 |
public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); } |
910 |
public void testSignalAll_IMSE(boolean fair) { |
911 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
912 |
final Condition c = lock.writeLock().newCondition(); |
913 |
try { |
914 |
c.signalAll(); |
915 |
shouldThrow(); |
916 |
} catch (IllegalMonitorStateException success) {} |
917 |
} |
918 |
|
919 |
/** |
920 |
* awaitNanos without a signal times out |
921 |
*/ |
922 |
public void testAwaitNanos_Timeout() { testAwaitNanos_Timeout(false); } |
923 |
public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); } |
924 |
public void testAwaitNanos_Timeout(boolean fair) { |
925 |
try { |
926 |
final ReentrantReadWriteLock lock = |
927 |
new ReentrantReadWriteLock(fair); |
928 |
final Condition c = lock.writeLock().newCondition(); |
929 |
lock.writeLock().lock(); |
930 |
long startTime = System.nanoTime(); |
931 |
long timeoutMillis = 10; |
932 |
long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
933 |
long nanosRemaining = c.awaitNanos(timeoutNanos); |
934 |
assertTrue(nanosRemaining <= 0); |
935 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
936 |
lock.writeLock().unlock(); |
937 |
} catch (InterruptedException e) { |
938 |
threadUnexpectedException(e); |
939 |
} |
940 |
} |
941 |
|
942 |
/** |
943 |
* timed await without a signal times out |
944 |
*/ |
945 |
public void testAwait_Timeout() { testAwait_Timeout(false); } |
946 |
public void testAwait_Timeout_fair() { testAwait_Timeout(true); } |
947 |
public void testAwait_Timeout(boolean fair) { |
948 |
try { |
949 |
final ReentrantReadWriteLock lock = |
950 |
new ReentrantReadWriteLock(fair); |
951 |
final Condition c = lock.writeLock().newCondition(); |
952 |
lock.writeLock().lock(); |
953 |
long startTime = System.nanoTime(); |
954 |
long timeoutMillis = 10; |
955 |
assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
956 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
957 |
lock.writeLock().unlock(); |
958 |
} catch (InterruptedException e) { |
959 |
threadUnexpectedException(e); |
960 |
} |
961 |
} |
962 |
|
963 |
/** |
964 |
* awaitUntil without a signal times out |
965 |
*/ |
966 |
public void testAwaitUntil_Timeout() { testAwaitUntil_Timeout(false); } |
967 |
public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); } |
968 |
public void testAwaitUntil_Timeout(boolean fair) { |
969 |
try { |
970 |
final ReentrantReadWriteLock lock = |
971 |
new ReentrantReadWriteLock(fair); |
972 |
final Condition c = lock.writeLock().newCondition(); |
973 |
lock.writeLock().lock(); |
974 |
long startTime = System.nanoTime(); |
975 |
long timeoutMillis = 10; |
976 |
java.util.Date d = new java.util.Date(); |
977 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis))); |
978 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
979 |
lock.writeLock().unlock(); |
980 |
} catch (InterruptedException e) { |
981 |
threadUnexpectedException(e); |
982 |
} |
983 |
} |
984 |
|
985 |
/** |
986 |
* await returns when signalled |
987 |
*/ |
988 |
public void testAwait() { testAwait(false); } |
989 |
public void testAwait_fair() { testAwait(true); } |
990 |
public void testAwait(boolean fair) { |
991 |
final PublicReentrantReadWriteLock lock = |
992 |
new PublicReentrantReadWriteLock(fair); |
993 |
final Condition c = lock.writeLock().newCondition(); |
994 |
final CountDownLatch locked = new CountDownLatch(1); |
995 |
Thread t = newStartedThread(new CheckedRunnable() { |
996 |
public void realRun() throws InterruptedException { |
997 |
lock.writeLock().lock(); |
998 |
locked.countDown(); |
999 |
c.await(); |
1000 |
lock.writeLock().unlock(); |
1001 |
}}); |
1002 |
|
1003 |
await(locked); |
1004 |
lock.writeLock().lock(); |
1005 |
assertHasWaiters(lock, c, t); |
1006 |
c.signal(); |
1007 |
assertHasNoWaiters(lock, c); |
1008 |
assertTrue(t.isAlive()); |
1009 |
lock.writeLock().unlock(); |
1010 |
awaitTermination(t); |
1011 |
} |
1012 |
|
1013 |
/** |
1014 |
* awaitUninterruptibly is uninterruptible |
1015 |
*/ |
1016 |
public void testAwaitUninterruptibly() { testAwaitUninterruptibly(false); } |
1017 |
public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); } |
1018 |
public void testAwaitUninterruptibly(boolean fair) { |
1019 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1020 |
final Condition c = lock.writeLock().newCondition(); |
1021 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
1022 |
|
1023 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
1024 |
public void realRun() { |
1025 |
// Interrupt before awaitUninterruptibly |
1026 |
lock.writeLock().lock(); |
1027 |
pleaseInterrupt.countDown(); |
1028 |
Thread.currentThread().interrupt(); |
1029 |
c.awaitUninterruptibly(); |
1030 |
assertTrue(Thread.interrupted()); |
1031 |
lock.writeLock().unlock(); |
1032 |
}}); |
1033 |
|
1034 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1035 |
public void realRun() { |
1036 |
// Interrupt during awaitUninterruptibly |
1037 |
lock.writeLock().lock(); |
1038 |
pleaseInterrupt.countDown(); |
1039 |
c.awaitUninterruptibly(); |
1040 |
assertTrue(Thread.interrupted()); |
1041 |
lock.writeLock().unlock(); |
1042 |
}}); |
1043 |
|
1044 |
await(pleaseInterrupt); |
1045 |
lock.writeLock().lock(); |
1046 |
lock.writeLock().unlock(); |
1047 |
t2.interrupt(); |
1048 |
|
1049 |
assertThreadStaysAlive(t1); |
1050 |
assertTrue(t2.isAlive()); |
1051 |
|
1052 |
lock.writeLock().lock(); |
1053 |
c.signalAll(); |
1054 |
lock.writeLock().unlock(); |
1055 |
|
1056 |
awaitTermination(t1); |
1057 |
awaitTermination(t2); |
1058 |
} |
1059 |
|
1060 |
/** |
1061 |
* await/awaitNanos/awaitUntil is interruptible |
1062 |
*/ |
1063 |
public void testInterruptible_await() { testInterruptible(false, AwaitMethod.await); } |
1064 |
public void testInterruptible_await_fair() { testInterruptible(true, AwaitMethod.await); } |
1065 |
public void testInterruptible_awaitTimed() { testInterruptible(false, AwaitMethod.awaitTimed); } |
1066 |
public void testInterruptible_awaitTimed_fair() { testInterruptible(true, AwaitMethod.awaitTimed); } |
1067 |
public void testInterruptible_awaitNanos() { testInterruptible(false, AwaitMethod.awaitNanos); } |
1068 |
public void testInterruptible_awaitNanos_fair() { testInterruptible(true, AwaitMethod.awaitNanos); } |
1069 |
public void testInterruptible_awaitUntil() { testInterruptible(false, AwaitMethod.awaitUntil); } |
1070 |
public void testInterruptible_awaitUntil_fair() { testInterruptible(true, AwaitMethod.awaitUntil); } |
1071 |
public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) { |
1072 |
final PublicReentrantReadWriteLock lock = |
1073 |
new PublicReentrantReadWriteLock(fair); |
1074 |
final Condition c = lock.writeLock().newCondition(); |
1075 |
final CountDownLatch locked = new CountDownLatch(1); |
1076 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1077 |
public void realRun() throws InterruptedException { |
1078 |
lock.writeLock().lock(); |
1079 |
assertWriteLockedByMoi(lock); |
1080 |
assertHasNoWaiters(lock, c); |
1081 |
locked.countDown(); |
1082 |
try { |
1083 |
await(c, awaitMethod); |
1084 |
} finally { |
1085 |
assertWriteLockedByMoi(lock); |
1086 |
assertHasNoWaiters(lock, c); |
1087 |
lock.writeLock().unlock(); |
1088 |
assertFalse(Thread.interrupted()); |
1089 |
} |
1090 |
}}); |
1091 |
|
1092 |
await(locked); |
1093 |
assertHasWaiters(lock, c, t); |
1094 |
t.interrupt(); |
1095 |
awaitTermination(t); |
1096 |
assertNotWriteLocked(lock); |
1097 |
} |
1098 |
|
1099 |
/** |
1100 |
* signalAll wakes up all threads |
1101 |
*/ |
1102 |
public void testSignalAll_await() { testSignalAll(false, AwaitMethod.await); } |
1103 |
public void testSignalAll_await_fair() { testSignalAll(true, AwaitMethod.await); } |
1104 |
public void testSignalAll_awaitTimed() { testSignalAll(false, AwaitMethod.awaitTimed); } |
1105 |
public void testSignalAll_awaitTimed_fair() { testSignalAll(true, AwaitMethod.awaitTimed); } |
1106 |
public void testSignalAll_awaitNanos() { testSignalAll(false, AwaitMethod.awaitNanos); } |
1107 |
public void testSignalAll_awaitNanos_fair() { testSignalAll(true, AwaitMethod.awaitNanos); } |
1108 |
public void testSignalAll_awaitUntil() { testSignalAll(false, AwaitMethod.awaitUntil); } |
1109 |
public void testSignalAll_awaitUntil_fair() { testSignalAll(true, AwaitMethod.awaitUntil); } |
1110 |
public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) { |
1111 |
final PublicReentrantReadWriteLock lock = |
1112 |
new PublicReentrantReadWriteLock(fair); |
1113 |
final Condition c = lock.writeLock().newCondition(); |
1114 |
final CountDownLatch locked = new CountDownLatch(2); |
1115 |
final Lock writeLock = lock.writeLock(); |
1116 |
class Awaiter extends CheckedRunnable { |
1117 |
public void realRun() throws InterruptedException { |
1118 |
writeLock.lock(); |
1119 |
locked.countDown(); |
1120 |
await(c, awaitMethod); |
1121 |
writeLock.unlock(); |
1122 |
} |
1123 |
} |
1124 |
|
1125 |
Thread t1 = newStartedThread(new Awaiter()); |
1126 |
Thread t2 = newStartedThread(new Awaiter()); |
1127 |
|
1128 |
await(locked); |
1129 |
writeLock.lock(); |
1130 |
assertHasWaiters(lock, c, t1, t2); |
1131 |
c.signalAll(); |
1132 |
assertHasNoWaiters(lock, c); |
1133 |
writeLock.unlock(); |
1134 |
awaitTermination(t1); |
1135 |
awaitTermination(t2); |
1136 |
} |
1137 |
|
1138 |
/** |
1139 |
* signal wakes up waiting threads in FIFO order |
1140 |
*/ |
1141 |
public void testSignalWakesFifo() { testSignalWakesFifo(false); } |
1142 |
public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); } |
1143 |
public void testSignalWakesFifo(boolean fair) { |
1144 |
final PublicReentrantReadWriteLock lock = |
1145 |
new PublicReentrantReadWriteLock(fair); |
1146 |
final Condition c = lock.writeLock().newCondition(); |
1147 |
final CountDownLatch locked1 = new CountDownLatch(1); |
1148 |
final CountDownLatch locked2 = new CountDownLatch(1); |
1149 |
final Lock writeLock = lock.writeLock(); |
1150 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
1151 |
public void realRun() throws InterruptedException { |
1152 |
writeLock.lock(); |
1153 |
locked1.countDown(); |
1154 |
c.await(); |
1155 |
writeLock.unlock(); |
1156 |
}}); |
1157 |
|
1158 |
await(locked1); |
1159 |
|
1160 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1161 |
public void realRun() throws InterruptedException { |
1162 |
writeLock.lock(); |
1163 |
locked2.countDown(); |
1164 |
c.await(); |
1165 |
writeLock.unlock(); |
1166 |
}}); |
1167 |
|
1168 |
await(locked2); |
1169 |
|
1170 |
writeLock.lock(); |
1171 |
assertHasWaiters(lock, c, t1, t2); |
1172 |
assertFalse(lock.hasQueuedThreads()); |
1173 |
c.signal(); |
1174 |
assertHasWaiters(lock, c, t2); |
1175 |
assertTrue(lock.hasQueuedThread(t1)); |
1176 |
assertFalse(lock.hasQueuedThread(t2)); |
1177 |
c.signal(); |
1178 |
assertHasNoWaiters(lock, c); |
1179 |
assertTrue(lock.hasQueuedThread(t1)); |
1180 |
assertTrue(lock.hasQueuedThread(t2)); |
1181 |
writeLock.unlock(); |
1182 |
awaitTermination(t1); |
1183 |
awaitTermination(t2); |
1184 |
} |
1185 |
|
1186 |
/** |
1187 |
* await after multiple reentrant locking preserves lock count |
1188 |
*/ |
1189 |
public void testAwaitLockCount() { testAwaitLockCount(false); } |
1190 |
public void testAwaitLockCount_fair() { testAwaitLockCount(true); } |
1191 |
public void testAwaitLockCount(boolean fair) { |
1192 |
final PublicReentrantReadWriteLock lock = |
1193 |
new PublicReentrantReadWriteLock(fair); |
1194 |
final Condition c = lock.writeLock().newCondition(); |
1195 |
final CountDownLatch locked = new CountDownLatch(2); |
1196 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
1197 |
public void realRun() throws InterruptedException { |
1198 |
lock.writeLock().lock(); |
1199 |
assertWriteLockedByMoi(lock); |
1200 |
assertEquals(1, lock.writeLock().getHoldCount()); |
1201 |
locked.countDown(); |
1202 |
c.await(); |
1203 |
assertWriteLockedByMoi(lock); |
1204 |
assertEquals(1, lock.writeLock().getHoldCount()); |
1205 |
lock.writeLock().unlock(); |
1206 |
}}); |
1207 |
|
1208 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1209 |
public void realRun() throws InterruptedException { |
1210 |
lock.writeLock().lock(); |
1211 |
lock.writeLock().lock(); |
1212 |
assertWriteLockedByMoi(lock); |
1213 |
assertEquals(2, lock.writeLock().getHoldCount()); |
1214 |
locked.countDown(); |
1215 |
c.await(); |
1216 |
assertWriteLockedByMoi(lock); |
1217 |
assertEquals(2, lock.writeLock().getHoldCount()); |
1218 |
lock.writeLock().unlock(); |
1219 |
lock.writeLock().unlock(); |
1220 |
}}); |
1221 |
|
1222 |
await(locked); |
1223 |
lock.writeLock().lock(); |
1224 |
assertHasWaiters(lock, c, t1, t2); |
1225 |
c.signalAll(); |
1226 |
assertHasNoWaiters(lock, c); |
1227 |
lock.writeLock().unlock(); |
1228 |
awaitTermination(t1); |
1229 |
awaitTermination(t2); |
1230 |
} |
1231 |
|
1232 |
/** |
1233 |
* A serialized lock deserializes as unlocked |
1234 |
*/ |
1235 |
public void testSerialization() { testSerialization(false); } |
1236 |
public void testSerialization_fair() { testSerialization(true); } |
1237 |
public void testSerialization(boolean fair) { |
1238 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1239 |
lock.writeLock().lock(); |
1240 |
lock.readLock().lock(); |
1241 |
|
1242 |
ReentrantReadWriteLock clone = serialClone(lock); |
1243 |
assertEquals(lock.isFair(), clone.isFair()); |
1244 |
assertTrue(lock.isWriteLocked()); |
1245 |
assertFalse(clone.isWriteLocked()); |
1246 |
assertEquals(1, lock.getReadLockCount()); |
1247 |
assertEquals(0, clone.getReadLockCount()); |
1248 |
clone.writeLock().lock(); |
1249 |
clone.readLock().lock(); |
1250 |
assertTrue(clone.isWriteLocked()); |
1251 |
assertEquals(1, clone.getReadLockCount()); |
1252 |
clone.readLock().unlock(); |
1253 |
clone.writeLock().unlock(); |
1254 |
assertFalse(clone.isWriteLocked()); |
1255 |
assertEquals(1, lock.getReadLockCount()); |
1256 |
assertEquals(0, clone.getReadLockCount()); |
1257 |
} |
1258 |
|
1259 |
/** |
1260 |
* hasQueuedThreads reports whether there are waiting threads |
1261 |
*/ |
1262 |
public void testHasQueuedThreads() { testHasQueuedThreads(false); } |
1263 |
public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); } |
1264 |
public void testHasQueuedThreads(boolean fair) { |
1265 |
final PublicReentrantReadWriteLock lock = |
1266 |
new PublicReentrantReadWriteLock(fair); |
1267 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1268 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1269 |
assertFalse(lock.hasQueuedThreads()); |
1270 |
lock.writeLock().lock(); |
1271 |
assertFalse(lock.hasQueuedThreads()); |
1272 |
t1.start(); |
1273 |
waitForQueuedThread(lock, t1); |
1274 |
assertTrue(lock.hasQueuedThreads()); |
1275 |
t2.start(); |
1276 |
waitForQueuedThread(lock, t2); |
1277 |
assertTrue(lock.hasQueuedThreads()); |
1278 |
t1.interrupt(); |
1279 |
awaitTermination(t1); |
1280 |
assertTrue(lock.hasQueuedThreads()); |
1281 |
lock.writeLock().unlock(); |
1282 |
awaitTermination(t2); |
1283 |
assertFalse(lock.hasQueuedThreads()); |
1284 |
} |
1285 |
|
1286 |
/** |
1287 |
* hasQueuedThread(null) throws NPE |
1288 |
*/ |
1289 |
public void testHasQueuedThreadNPE() { testHasQueuedThreadNPE(false); } |
1290 |
public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); } |
1291 |
public void testHasQueuedThreadNPE(boolean fair) { |
1292 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1293 |
try { |
1294 |
lock.hasQueuedThread(null); |
1295 |
shouldThrow(); |
1296 |
} catch (NullPointerException success) {} |
1297 |
} |
1298 |
|
1299 |
/** |
1300 |
* hasQueuedThread reports whether a thread is queued |
1301 |
*/ |
1302 |
public void testHasQueuedThread() { testHasQueuedThread(false); } |
1303 |
public void testHasQueuedThread_fair() { testHasQueuedThread(true); } |
1304 |
public void testHasQueuedThread(boolean fair) { |
1305 |
final PublicReentrantReadWriteLock lock = |
1306 |
new PublicReentrantReadWriteLock(fair); |
1307 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1308 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1309 |
assertFalse(lock.hasQueuedThread(t1)); |
1310 |
assertFalse(lock.hasQueuedThread(t2)); |
1311 |
lock.writeLock().lock(); |
1312 |
t1.start(); |
1313 |
waitForQueuedThread(lock, t1); |
1314 |
assertTrue(lock.hasQueuedThread(t1)); |
1315 |
assertFalse(lock.hasQueuedThread(t2)); |
1316 |
t2.start(); |
1317 |
waitForQueuedThread(lock, t2); |
1318 |
assertTrue(lock.hasQueuedThread(t1)); |
1319 |
assertTrue(lock.hasQueuedThread(t2)); |
1320 |
t1.interrupt(); |
1321 |
awaitTermination(t1); |
1322 |
assertFalse(lock.hasQueuedThread(t1)); |
1323 |
assertTrue(lock.hasQueuedThread(t2)); |
1324 |
lock.writeLock().unlock(); |
1325 |
awaitTermination(t2); |
1326 |
assertFalse(lock.hasQueuedThread(t1)); |
1327 |
assertFalse(lock.hasQueuedThread(t2)); |
1328 |
} |
1329 |
|
1330 |
/** |
1331 |
* getQueueLength reports number of waiting threads |
1332 |
*/ |
1333 |
public void testGetQueueLength() { testGetQueueLength(false); } |
1334 |
public void testGetQueueLength_fair() { testGetQueueLength(true); } |
1335 |
public void testGetQueueLength(boolean fair) { |
1336 |
final PublicReentrantReadWriteLock lock = |
1337 |
new PublicReentrantReadWriteLock(fair); |
1338 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1339 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1340 |
assertEquals(0, lock.getQueueLength()); |
1341 |
lock.writeLock().lock(); |
1342 |
t1.start(); |
1343 |
waitForQueuedThread(lock, t1); |
1344 |
assertEquals(1, lock.getQueueLength()); |
1345 |
t2.start(); |
1346 |
waitForQueuedThread(lock, t2); |
1347 |
assertEquals(2, lock.getQueueLength()); |
1348 |
t1.interrupt(); |
1349 |
awaitTermination(t1); |
1350 |
assertEquals(1, lock.getQueueLength()); |
1351 |
lock.writeLock().unlock(); |
1352 |
awaitTermination(t2); |
1353 |
assertEquals(0, lock.getQueueLength()); |
1354 |
} |
1355 |
|
1356 |
/** |
1357 |
* getQueuedThreads includes waiting threads |
1358 |
*/ |
1359 |
public void testGetQueuedThreads() { testGetQueuedThreads(false); } |
1360 |
public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); } |
1361 |
public void testGetQueuedThreads(boolean fair) { |
1362 |
final PublicReentrantReadWriteLock lock = |
1363 |
new PublicReentrantReadWriteLock(fair); |
1364 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1365 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1366 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1367 |
lock.writeLock().lock(); |
1368 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1369 |
t1.start(); |
1370 |
waitForQueuedThread(lock, t1); |
1371 |
assertEquals(1, lock.getQueuedThreads().size()); |
1372 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
1373 |
t2.start(); |
1374 |
waitForQueuedThread(lock, t2); |
1375 |
assertEquals(2, lock.getQueuedThreads().size()); |
1376 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
1377 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
1378 |
t1.interrupt(); |
1379 |
awaitTermination(t1); |
1380 |
assertFalse(lock.getQueuedThreads().contains(t1)); |
1381 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
1382 |
assertEquals(1, lock.getQueuedThreads().size()); |
1383 |
lock.writeLock().unlock(); |
1384 |
awaitTermination(t2); |
1385 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1386 |
} |
1387 |
|
1388 |
/** |
1389 |
* hasWaiters throws NPE if null |
1390 |
*/ |
1391 |
public void testHasWaitersNPE() { testHasWaitersNPE(false); } |
1392 |
public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); } |
1393 |
public void testHasWaitersNPE(boolean fair) { |
1394 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1395 |
try { |
1396 |
lock.hasWaiters(null); |
1397 |
shouldThrow(); |
1398 |
} catch (NullPointerException success) {} |
1399 |
} |
1400 |
|
1401 |
/** |
1402 |
* getWaitQueueLength throws NPE if null |
1403 |
*/ |
1404 |
public void testGetWaitQueueLengthNPE() { testGetWaitQueueLengthNPE(false); } |
1405 |
public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); } |
1406 |
public void testGetWaitQueueLengthNPE(boolean fair) { |
1407 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1408 |
try { |
1409 |
lock.getWaitQueueLength(null); |
1410 |
shouldThrow(); |
1411 |
} catch (NullPointerException success) {} |
1412 |
} |
1413 |
|
1414 |
/** |
1415 |
* getWaitingThreads throws NPE if null |
1416 |
*/ |
1417 |
public void testGetWaitingThreadsNPE() { testGetWaitingThreadsNPE(false); } |
1418 |
public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); } |
1419 |
public void testGetWaitingThreadsNPE(boolean fair) { |
1420 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair); |
1421 |
try { |
1422 |
lock.getWaitingThreads(null); |
1423 |
shouldThrow(); |
1424 |
} catch (NullPointerException success) {} |
1425 |
} |
1426 |
|
1427 |
/** |
1428 |
* hasWaiters throws IllegalArgumentException if not owned |
1429 |
*/ |
1430 |
public void testHasWaitersIAE() { testHasWaitersIAE(false); } |
1431 |
public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); } |
1432 |
public void testHasWaitersIAE(boolean fair) { |
1433 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1434 |
final Condition c = lock.writeLock().newCondition(); |
1435 |
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair); |
1436 |
try { |
1437 |
lock2.hasWaiters(c); |
1438 |
shouldThrow(); |
1439 |
} catch (IllegalArgumentException success) {} |
1440 |
} |
1441 |
|
1442 |
/** |
1443 |
* hasWaiters throws IllegalMonitorStateException if not locked |
1444 |
*/ |
1445 |
public void testHasWaitersIMSE() { testHasWaitersIMSE(false); } |
1446 |
public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); } |
1447 |
public void testHasWaitersIMSE(boolean fair) { |
1448 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1449 |
final Condition c = lock.writeLock().newCondition(); |
1450 |
try { |
1451 |
lock.hasWaiters(c); |
1452 |
shouldThrow(); |
1453 |
} catch (IllegalMonitorStateException success) {} |
1454 |
} |
1455 |
|
1456 |
/** |
1457 |
* getWaitQueueLength throws IllegalArgumentException if not owned |
1458 |
*/ |
1459 |
public void testGetWaitQueueLengthIAE() { testGetWaitQueueLengthIAE(false); } |
1460 |
public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); } |
1461 |
public void testGetWaitQueueLengthIAE(boolean fair) { |
1462 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1463 |
final Condition c = lock.writeLock().newCondition(); |
1464 |
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair); |
1465 |
try { |
1466 |
lock2.getWaitQueueLength(c); |
1467 |
shouldThrow(); |
1468 |
} catch (IllegalArgumentException success) {} |
1469 |
} |
1470 |
|
1471 |
/** |
1472 |
* getWaitQueueLength throws IllegalMonitorStateException if not locked |
1473 |
*/ |
1474 |
public void testGetWaitQueueLengthIMSE() { testGetWaitQueueLengthIMSE(false); } |
1475 |
public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); } |
1476 |
public void testGetWaitQueueLengthIMSE(boolean fair) { |
1477 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1478 |
final Condition c = lock.writeLock().newCondition(); |
1479 |
try { |
1480 |
lock.getWaitQueueLength(c); |
1481 |
shouldThrow(); |
1482 |
} catch (IllegalMonitorStateException success) {} |
1483 |
} |
1484 |
|
1485 |
/** |
1486 |
* getWaitingThreads throws IllegalArgumentException if not owned |
1487 |
*/ |
1488 |
public void testGetWaitingThreadsIAE() { testGetWaitingThreadsIAE(false); } |
1489 |
public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); } |
1490 |
public void testGetWaitingThreadsIAE(boolean fair) { |
1491 |
final PublicReentrantReadWriteLock lock = |
1492 |
new PublicReentrantReadWriteLock(fair); |
1493 |
final Condition c = lock.writeLock().newCondition(); |
1494 |
final PublicReentrantReadWriteLock lock2 = |
1495 |
new PublicReentrantReadWriteLock(fair); |
1496 |
try { |
1497 |
lock2.getWaitingThreads(c); |
1498 |
shouldThrow(); |
1499 |
} catch (IllegalArgumentException success) {} |
1500 |
} |
1501 |
|
1502 |
/** |
1503 |
* getWaitingThreads throws IllegalMonitorStateException if not locked |
1504 |
*/ |
1505 |
public void testGetWaitingThreadsIMSE() { testGetWaitingThreadsIMSE(false); } |
1506 |
public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); } |
1507 |
public void testGetWaitingThreadsIMSE(boolean fair) { |
1508 |
final PublicReentrantReadWriteLock lock = |
1509 |
new PublicReentrantReadWriteLock(fair); |
1510 |
final Condition c = lock.writeLock().newCondition(); |
1511 |
try { |
1512 |
lock.getWaitingThreads(c); |
1513 |
shouldThrow(); |
1514 |
} catch (IllegalMonitorStateException success) {} |
1515 |
} |
1516 |
|
1517 |
/** |
1518 |
* hasWaiters returns true when a thread is waiting, else false |
1519 |
*/ |
1520 |
public void testHasWaiters() { testHasWaiters(false); } |
1521 |
public void testHasWaiters_fair() { testHasWaiters(true); } |
1522 |
public void testHasWaiters(boolean fair) { |
1523 |
final PublicReentrantReadWriteLock lock = |
1524 |
new PublicReentrantReadWriteLock(fair); |
1525 |
final Condition c = lock.writeLock().newCondition(); |
1526 |
final CountDownLatch locked = new CountDownLatch(1); |
1527 |
Thread t = newStartedThread(new CheckedRunnable() { |
1528 |
public void realRun() throws InterruptedException { |
1529 |
lock.writeLock().lock(); |
1530 |
assertHasNoWaiters(lock, c); |
1531 |
assertFalse(lock.hasWaiters(c)); |
1532 |
locked.countDown(); |
1533 |
c.await(); |
1534 |
assertHasNoWaiters(lock, c); |
1535 |
assertFalse(lock.hasWaiters(c)); |
1536 |
lock.writeLock().unlock(); |
1537 |
}}); |
1538 |
|
1539 |
await(locked); |
1540 |
lock.writeLock().lock(); |
1541 |
assertHasWaiters(lock, c, t); |
1542 |
assertTrue(lock.hasWaiters(c)); |
1543 |
c.signal(); |
1544 |
assertHasNoWaiters(lock, c); |
1545 |
assertFalse(lock.hasWaiters(c)); |
1546 |
lock.writeLock().unlock(); |
1547 |
awaitTermination(t); |
1548 |
assertHasNoWaiters(lock, c); |
1549 |
} |
1550 |
|
1551 |
/** |
1552 |
* getWaitQueueLength returns number of waiting threads |
1553 |
*/ |
1554 |
public void testGetWaitQueueLength() { testGetWaitQueueLength(false); } |
1555 |
public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); } |
1556 |
public void testGetWaitQueueLength(boolean fair) { |
1557 |
final PublicReentrantReadWriteLock lock = |
1558 |
new PublicReentrantReadWriteLock(fair); |
1559 |
final Condition c = lock.writeLock().newCondition(); |
1560 |
final CountDownLatch locked = new CountDownLatch(1); |
1561 |
Thread t = newStartedThread(new CheckedRunnable() { |
1562 |
public void realRun() throws InterruptedException { |
1563 |
lock.writeLock().lock(); |
1564 |
assertEquals(0, lock.getWaitQueueLength(c)); |
1565 |
locked.countDown(); |
1566 |
c.await(); |
1567 |
lock.writeLock().unlock(); |
1568 |
}}); |
1569 |
|
1570 |
await(locked); |
1571 |
lock.writeLock().lock(); |
1572 |
assertHasWaiters(lock, c, t); |
1573 |
assertEquals(1, lock.getWaitQueueLength(c)); |
1574 |
c.signal(); |
1575 |
assertHasNoWaiters(lock, c); |
1576 |
assertEquals(0, lock.getWaitQueueLength(c)); |
1577 |
lock.writeLock().unlock(); |
1578 |
awaitTermination(t); |
1579 |
} |
1580 |
|
1581 |
/** |
1582 |
* getWaitingThreads returns only and all waiting threads |
1583 |
*/ |
1584 |
public void testGetWaitingThreads() { testGetWaitingThreads(false); } |
1585 |
public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); } |
1586 |
public void testGetWaitingThreads(boolean fair) { |
1587 |
final PublicReentrantReadWriteLock lock = |
1588 |
new PublicReentrantReadWriteLock(fair); |
1589 |
final Condition c = lock.writeLock().newCondition(); |
1590 |
final CountDownLatch locked1 = new CountDownLatch(1); |
1591 |
final CountDownLatch locked2 = new CountDownLatch(1); |
1592 |
Thread t1 = new Thread(new CheckedRunnable() { |
1593 |
public void realRun() throws InterruptedException { |
1594 |
lock.writeLock().lock(); |
1595 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1596 |
locked1.countDown(); |
1597 |
c.await(); |
1598 |
lock.writeLock().unlock(); |
1599 |
}}); |
1600 |
|
1601 |
Thread t2 = new Thread(new CheckedRunnable() { |
1602 |
public void realRun() throws InterruptedException { |
1603 |
lock.writeLock().lock(); |
1604 |
assertFalse(lock.getWaitingThreads(c).isEmpty()); |
1605 |
locked2.countDown(); |
1606 |
c.await(); |
1607 |
lock.writeLock().unlock(); |
1608 |
}}); |
1609 |
|
1610 |
lock.writeLock().lock(); |
1611 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1612 |
lock.writeLock().unlock(); |
1613 |
|
1614 |
t1.start(); |
1615 |
await(locked1); |
1616 |
t2.start(); |
1617 |
await(locked2); |
1618 |
|
1619 |
lock.writeLock().lock(); |
1620 |
assertTrue(lock.hasWaiters(c)); |
1621 |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
1622 |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
1623 |
assertEquals(2, lock.getWaitingThreads(c).size()); |
1624 |
c.signalAll(); |
1625 |
assertHasNoWaiters(lock, c); |
1626 |
lock.writeLock().unlock(); |
1627 |
|
1628 |
awaitTermination(t1); |
1629 |
awaitTermination(t2); |
1630 |
|
1631 |
assertHasNoWaiters(lock, c); |
1632 |
} |
1633 |
|
1634 |
/** |
1635 |
* toString indicates current lock state |
1636 |
*/ |
1637 |
public void testToString() { testToString(false); } |
1638 |
public void testToString_fair() { testToString(true); } |
1639 |
public void testToString(boolean fair) { |
1640 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1641 |
assertTrue(lock.toString().contains("Write locks = 0")); |
1642 |
assertTrue(lock.toString().contains("Read locks = 0")); |
1643 |
lock.writeLock().lock(); |
1644 |
assertTrue(lock.toString().contains("Write locks = 1")); |
1645 |
assertTrue(lock.toString().contains("Read locks = 0")); |
1646 |
lock.writeLock().unlock(); |
1647 |
lock.readLock().lock(); |
1648 |
lock.readLock().lock(); |
1649 |
assertTrue(lock.toString().contains("Write locks = 0")); |
1650 |
assertTrue(lock.toString().contains("Read locks = 2")); |
1651 |
} |
1652 |
|
1653 |
/** |
1654 |
* readLock.toString indicates current lock state |
1655 |
*/ |
1656 |
public void testReadLockToString() { testReadLockToString(false); } |
1657 |
public void testReadLockToString_fair() { testReadLockToString(true); } |
1658 |
public void testReadLockToString(boolean fair) { |
1659 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1660 |
assertTrue(lock.readLock().toString().contains("Read locks = 0")); |
1661 |
lock.readLock().lock(); |
1662 |
lock.readLock().lock(); |
1663 |
assertTrue(lock.readLock().toString().contains("Read locks = 2")); |
1664 |
} |
1665 |
|
1666 |
/** |
1667 |
* writeLock.toString indicates current lock state |
1668 |
*/ |
1669 |
public void testWriteLockToString() { testWriteLockToString(false); } |
1670 |
public void testWriteLockToString_fair() { testWriteLockToString(true); } |
1671 |
public void testWriteLockToString(boolean fair) { |
1672 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1673 |
assertTrue(lock.writeLock().toString().contains("Unlocked")); |
1674 |
lock.writeLock().lock(); |
1675 |
assertTrue(lock.writeLock().toString().contains("Locked")); |
1676 |
lock.writeLock().unlock(); |
1677 |
assertTrue(lock.writeLock().toString().contains("Unlocked")); |
1678 |
} |
1679 |
|
1680 |
} |