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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.concurrent.locks.*; |
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import java.util.concurrent.*; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import java.io.*; |
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import java.util.*; |
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|
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public class ReentrantReadWriteLockTest extends TestCase { |
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static int HOLD_COUNT_TEST_LIMIT = 20; |
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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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junit.textui.TestRunner.run(suite()); |
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} |
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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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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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/** |
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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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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(ReentrantReadWriteLock lock) { |
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ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock(); |
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assertTrue(writeLock.isHeldByCurrentThread()); |
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writeLock.unlock(); |
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assertFalse(writeLock.isHeldByCurrentThread()); |
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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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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
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assertFalse(rl.isFair()); |
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assertFalse(rl.isWriteLocked()); |
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assertEquals(0, rl.getReadLockCount()); |
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ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true); |
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assertTrue(r2.isFair()); |
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assertFalse(r2.isWriteLocked()); |
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assertEquals(0, r2.getReadLockCount()); |
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ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false); |
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assertFalse(r3.isFair()); |
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assertFalse(r3.isWriteLocked()); |
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assertEquals(0, r3.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() { |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
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rl.writeLock().lock(); |
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assertTrue(rl.isWriteLocked()); |
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assertTrue(rl.isWriteLockedByCurrentThread()); |
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assertTrue(rl.writeLock().isHeldByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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rl.writeLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertFalse(rl.writeLock().isHeldByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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rl.readLock().lock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(1, rl.getReadLockCount()); |
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rl.readLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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} |
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|
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|
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/** |
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* locking an unlocked fair lock succeeds |
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*/ |
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public void testFairLock() { |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true); |
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rl.writeLock().lock(); |
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assertTrue(rl.isWriteLocked()); |
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assertTrue(rl.isWriteLockedByCurrentThread()); |
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assertTrue(rl.writeLock().isHeldByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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rl.writeLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertFalse(rl.writeLock().isHeldByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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rl.readLock().lock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(1, rl.getReadLockCount()); |
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rl.readLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.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() { |
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ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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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() { |
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ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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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() { |
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ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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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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/** |
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* write-unlocking an unlocked lock throws IllegalMonitorStateException |
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*/ |
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public void testUnlock_IllegalMonitorStateException() { |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
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try { |
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rl.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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/** |
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* write-lockInterruptibly is interruptible |
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*/ |
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public void testWriteLockInterruptibly_Interrupted() throws Exception { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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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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Thread.sleep(SHORT_DELAY_MS); |
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t.interrupt(); |
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awaitTermination(t, LONG_DELAY_MS); |
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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 |
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*/ |
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public void testWriteTryLock_Interrupted() throws InterruptedException { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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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(SMALL_DELAY_MS, MILLISECONDS); |
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}}); |
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|
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Thread.sleep(SHORT_DELAY_MS); |
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t.interrupt(); |
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awaitTermination(t, LONG_DELAY_MS); |
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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_Interrupted() throws InterruptedException { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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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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|
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Thread.sleep(SHORT_DELAY_MS); |
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t.interrupt(); |
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awaitTermination(t, LONG_DELAY_MS); |
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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 |
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*/ |
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public void testReadTryLock_Interrupted() throws InterruptedException { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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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(LONG_DELAY_MS, MILLISECONDS); |
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}}); |
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|
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Thread.sleep(SHORT_DELAY_MS); |
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t.interrupt(); |
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awaitTermination(t, LONG_DELAY_MS); |
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releaseWriteLock(lock); |
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} |
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|
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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() throws InterruptedException { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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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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|
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awaitTermination(t, LONG_DELAY_MS); |
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releaseWriteLock(lock); |
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} |
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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() throws InterruptedException { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().lock(); |
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Thread t = newStartedThread(new CheckedRunnable() { |
289 |
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public void realRun() { |
290 |
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assertFalse(lock.readLock().tryLock()); |
291 |
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}}); |
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|
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awaitTermination(t, LONG_DELAY_MS); |
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releaseWriteLock(lock); |
295 |
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} |
296 |
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|
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/** |
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* Multiple threads can hold a read lock when not write-locked |
299 |
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*/ |
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public void testMultipleReadLocks() throws InterruptedException { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
302 |
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lock.readLock().lock(); |
303 |
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Thread t = newStartedThread(new CheckedRunnable() { |
304 |
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public void realRun() { |
305 |
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assertTrue(lock.readLock().tryLock()); |
306 |
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lock.readLock().unlock(); |
307 |
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}}); |
308 |
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|
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awaitTermination(t, LONG_DELAY_MS); |
310 |
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lock.readLock().unlock(); |
311 |
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} |
312 |
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|
313 |
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/** |
314 |
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* A writelock succeeds after reading threads unlock |
315 |
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*/ |
316 |
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public void testWriteAfterMultipleReadLocks() throws InterruptedException { |
317 |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
318 |
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lock.readLock().lock(); |
319 |
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Thread t1 = newStartedThread(new CheckedRunnable() { |
320 |
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public void realRun() { |
321 |
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lock.readLock().lock(); |
322 |
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lock.readLock().unlock(); |
323 |
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}}); |
324 |
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Thread t2 = newStartedThread(new CheckedRunnable() { |
325 |
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public void realRun() { |
326 |
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lock.writeLock().lock(); |
327 |
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lock.writeLock().unlock(); |
328 |
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}}); |
329 |
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|
330 |
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Thread.sleep(SHORT_DELAY_MS); |
331 |
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lock.readLock().unlock(); |
332 |
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awaitTermination(t1, LONG_DELAY_MS); |
333 |
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awaitTermination(t2, LONG_DELAY_MS); |
334 |
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} |
335 |
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|
336 |
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/** |
337 |
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* Readlocks succeed after a writing thread unlocks |
338 |
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*/ |
339 |
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public void testReadAfterWriteLock() throws InterruptedException { |
340 |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
341 |
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lock.writeLock().lock(); |
342 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
343 |
+ |
public void realRun() { |
344 |
+ |
lock.readLock().lock(); |
345 |
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lock.readLock().unlock(); |
346 |
+ |
}}); |
347 |
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Thread t2 = newStartedThread(new CheckedRunnable() { |
348 |
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public void realRun() { |
349 |
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lock.readLock().lock(); |
350 |
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lock.readLock().unlock(); |
351 |
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}}); |
352 |
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|
353 |
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Thread.sleep(SHORT_DELAY_MS); |
354 |
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assertTrue(t1.isAlive()); |
355 |
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assertTrue(t2.isAlive()); |
356 |
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releaseWriteLock(lock); |
357 |
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awaitTermination(t1, LONG_DELAY_MS); |
358 |
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awaitTermination(t2, LONG_DELAY_MS); |
359 |
+ |
} |
360 |
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|
361 |
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/** |
362 |
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* Read trylock succeeds if write locked by current thread |
363 |
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*/ |
364 |
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public void testReadHoldingWriteLock() { |
365 |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
366 |
+ |
lock.writeLock().lock(); |
367 |
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assertTrue(lock.readLock().tryLock()); |
368 |
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lock.readLock().unlock(); |
369 |
+ |
lock.writeLock().unlock(); |
370 |
+ |
} |
371 |
+ |
|
372 |
+ |
/** |
373 |
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* Read lock succeeds if write locked by current thread even if |
374 |
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* other threads are waiting for readlock |
375 |
+ |
*/ |
376 |
+ |
public void testReadHoldingWriteLock2() throws InterruptedException { |
377 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
378 |
+ |
lock.writeLock().lock(); |
379 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
380 |
+ |
public void realRun() { |
381 |
+ |
lock.readLock().lock(); |
382 |
+ |
lock.readLock().unlock(); |
383 |
+ |
}}); |
384 |
+ |
Thread t2 = newStartedThread(new CheckedRunnable() { |
385 |
+ |
public void realRun() { |
386 |
+ |
lock.readLock().lock(); |
387 |
+ |
lock.readLock().unlock(); |
388 |
+ |
}}); |
389 |
+ |
|
390 |
+ |
lock.readLock().lock(); |
391 |
+ |
lock.readLock().unlock(); |
392 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
393 |
+ |
lock.readLock().lock(); |
394 |
+ |
lock.readLock().unlock(); |
395 |
+ |
lock.writeLock().unlock(); |
396 |
+ |
awaitTermination(t1, LONG_DELAY_MS); |
397 |
+ |
awaitTermination(t2, LONG_DELAY_MS); |
398 |
+ |
} |
399 |
+ |
|
400 |
+ |
/** |
401 |
+ |
* Read lock succeeds if write locked by current thread even if |
402 |
+ |
* other threads are waiting for writelock |
403 |
+ |
*/ |
404 |
+ |
public void testReadHoldingWriteLock3() throws InterruptedException { |
405 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
406 |
+ |
lock.writeLock().lock(); |
407 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
408 |
+ |
public void realRun() { |
409 |
+ |
lock.writeLock().lock(); |
410 |
+ |
lock.writeLock().unlock(); |
411 |
+ |
}}); |
412 |
+ |
Thread t2 = newStartedThread(new CheckedRunnable() { |
413 |
+ |
public void realRun() { |
414 |
+ |
lock.writeLock().lock(); |
415 |
+ |
lock.writeLock().unlock(); |
416 |
+ |
}}); |
417 |
+ |
|
418 |
+ |
lock.readLock().lock(); |
419 |
+ |
lock.readLock().unlock(); |
420 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
421 |
+ |
lock.readLock().lock(); |
422 |
+ |
lock.readLock().unlock(); |
423 |
+ |
lock.writeLock().unlock(); |
424 |
+ |
awaitTermination(t1, LONG_DELAY_MS); |
425 |
+ |
awaitTermination(t2, LONG_DELAY_MS); |
426 |
+ |
} |
427 |
+ |
|
428 |
+ |
|
429 |
+ |
/** |
430 |
+ |
* Write lock succeeds if write locked by current thread even if |
431 |
+ |
* other threads are waiting for writelock |
432 |
+ |
*/ |
433 |
+ |
public void testWriteHoldingWriteLock4() throws InterruptedException { |
434 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
435 |
+ |
lock.writeLock().lock(); |
436 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
437 |
+ |
public void realRun() { |
438 |
+ |
lock.writeLock().lock(); |
439 |
+ |
lock.writeLock().unlock(); |
440 |
+ |
}}); |
441 |
+ |
Thread t2 = newStartedThread(new CheckedRunnable() { |
442 |
+ |
public void realRun() { |
443 |
+ |
lock.writeLock().lock(); |
444 |
+ |
lock.writeLock().unlock(); |
445 |
+ |
}}); |
446 |
+ |
|
447 |
+ |
lock.writeLock().lock(); |
448 |
+ |
lock.writeLock().unlock(); |
449 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
450 |
+ |
lock.writeLock().lock(); |
451 |
+ |
lock.writeLock().unlock(); |
452 |
+ |
lock.writeLock().unlock(); |
453 |
+ |
awaitTermination(t1, LONG_DELAY_MS); |
454 |
+ |
awaitTermination(t2, LONG_DELAY_MS); |
455 |
+ |
} |
456 |
+ |
|
457 |
+ |
|
458 |
+ |
/** |
459 |
+ |
* Fair Read trylock succeeds if write locked by current thread |
460 |
+ |
*/ |
461 |
+ |
public void testReadHoldingWriteLockFair() { |
462 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
463 |
+ |
lock.writeLock().lock(); |
464 |
+ |
assertTrue(lock.readLock().tryLock()); |
465 |
+ |
lock.readLock().unlock(); |
466 |
+ |
lock.writeLock().unlock(); |
467 |
+ |
} |
468 |
+ |
|
469 |
+ |
/** |
470 |
+ |
* Fair Read lock succeeds if write locked by current thread even if |
471 |
+ |
* other threads are waiting for readlock |
472 |
+ |
*/ |
473 |
+ |
public void testReadHoldingWriteLockFair2() throws InterruptedException { |
474 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
475 |
+ |
lock.writeLock().lock(); |
476 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
477 |
+ |
public void realRun() { |
478 |
+ |
lock.readLock().lock(); |
479 |
+ |
lock.readLock().unlock(); |
480 |
+ |
}}); |
481 |
+ |
Thread t2 = newStartedThread(new CheckedRunnable() { |
482 |
+ |
public void realRun() { |
483 |
+ |
lock.readLock().lock(); |
484 |
+ |
lock.readLock().unlock(); |
485 |
+ |
}}); |
486 |
+ |
|
487 |
+ |
lock.readLock().lock(); |
488 |
+ |
lock.readLock().unlock(); |
489 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
490 |
+ |
lock.readLock().lock(); |
491 |
+ |
lock.readLock().unlock(); |
492 |
+ |
lock.writeLock().unlock(); |
493 |
+ |
awaitTermination(t1, LONG_DELAY_MS); |
494 |
+ |
awaitTermination(t2, LONG_DELAY_MS); |
495 |
+ |
} |
496 |
+ |
|
497 |
+ |
|
498 |
+ |
/** |
499 |
+ |
* Fair Read lock succeeds if write locked by current thread even if |
500 |
+ |
* other threads are waiting for writelock |
501 |
+ |
*/ |
502 |
+ |
public void testReadHoldingWriteLockFair3() throws InterruptedException { |
503 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
504 |
+ |
lock.writeLock().lock(); |
505 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
506 |
+ |
public void realRun() { |
507 |
+ |
lock.writeLock().lock(); |
508 |
+ |
lock.writeLock().unlock(); |
509 |
+ |
}}); |
510 |
+ |
Thread t2 = newStartedThread(new CheckedRunnable() { |
511 |
+ |
public void realRun() { |
512 |
+ |
lock.writeLock().lock(); |
513 |
+ |
lock.writeLock().unlock(); |
514 |
+ |
}}); |
515 |
+ |
|
516 |
+ |
lock.readLock().lock(); |
517 |
+ |
lock.readLock().unlock(); |
518 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
519 |
+ |
lock.readLock().lock(); |
520 |
+ |
lock.readLock().unlock(); |
521 |
+ |
lock.writeLock().unlock(); |
522 |
+ |
awaitTermination(t1, LONG_DELAY_MS); |
523 |
+ |
awaitTermination(t2, LONG_DELAY_MS); |
524 |
+ |
} |
525 |
|
|
526 |
< |
private static long SHORT_DELAY_MS = 100; |
527 |
< |
private static long MEDIUM_DELAY_MS = 1000; |
528 |
< |
private static long LONG_DELAY_MS = 10000; |
529 |
< |
|
530 |
< |
/* |
531 |
< |
* Unlocks an unlocked lock, throws Illegal Monitor State |
532 |
< |
* |
533 |
< |
*/ |
534 |
< |
|
535 |
< |
public void testIllegalMonitorStateException(){ |
536 |
< |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
537 |
< |
try{ |
538 |
< |
rl.writeLock().unlock(); |
539 |
< |
fail("Should of thown Illegal Monitor State Exception"); |
540 |
< |
|
541 |
< |
}catch(IllegalMonitorStateException sucess){} |
542 |
< |
|
543 |
< |
|
544 |
< |
} |
545 |
< |
|
546 |
< |
/* |
547 |
< |
* makes a lock, locks it, tries to aquire the lock in another thread |
548 |
< |
* interrupts that thread and waits for an interrupted Exception to |
549 |
< |
* be thrown. |
550 |
< |
*/ |
551 |
< |
|
552 |
< |
public void testInterruptedException(){ |
553 |
< |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
554 |
< |
lock.writeLock().lock(); |
555 |
< |
Thread t = new Thread(new Runnable() { |
556 |
< |
public void run(){ |
557 |
< |
try{ |
558 |
< |
lock.writeLock().lockInterruptibly(); |
559 |
< |
fail("should throw"); |
560 |
< |
}catch(InterruptedException sucess){} |
561 |
< |
} |
562 |
< |
}); |
563 |
< |
t.start(); |
564 |
< |
t.interrupt(); |
565 |
< |
lock.writeLock().unlock(); |
566 |
< |
} |
567 |
< |
|
568 |
< |
/* |
569 |
< |
* tests for interrupted exception on a timed wait |
570 |
< |
* |
571 |
< |
*/ |
572 |
< |
|
573 |
< |
|
574 |
< |
public void testInterruptedException2(){ |
575 |
< |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
576 |
< |
lock.writeLock().lock(); |
577 |
< |
Thread t = new Thread(new Runnable() { |
578 |
< |
public void run(){ |
579 |
< |
try{ |
580 |
< |
lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS); |
581 |
< |
fail("should throw"); |
582 |
< |
}catch(InterruptedException sucess){} |
583 |
< |
} |
584 |
< |
}); |
585 |
< |
t.start(); |
586 |
< |
t.interrupt(); |
587 |
< |
} |
588 |
< |
|
589 |
< |
|
590 |
< |
|
591 |
< |
/* |
592 |
< |
* current thread locks interruptibly the thread |
593 |
< |
* another thread tries to aquire the lock and blocks |
594 |
< |
* on the call. interrupt the attempted aquireLock |
595 |
< |
* assert that the first lock() call actually locked the lock |
596 |
< |
* assert that the current thread is the one holding the lock |
597 |
< |
*/ |
598 |
< |
|
599 |
< |
public void testLockedInterruptibly() { |
600 |
< |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
601 |
< |
try {lock.writeLock().lockInterruptibly();} catch(Exception e) {} |
602 |
< |
Thread t = new Thread(new Runnable() { |
603 |
< |
public void run() { |
604 |
< |
try { |
605 |
< |
lock.writeLock().lockInterruptibly(); |
606 |
< |
fail("Failed to generate an Interrupted Exception"); |
607 |
< |
} |
608 |
< |
catch(InterruptedException e) {} |
609 |
< |
} |
610 |
< |
}); |
611 |
< |
t.start(); |
612 |
< |
t.interrupt(); |
526 |
> |
|
527 |
> |
/** |
528 |
> |
* Fair Write lock succeeds if write locked by current thread even if |
529 |
> |
* other threads are waiting for writelock |
530 |
> |
*/ |
531 |
> |
public void testWriteHoldingWriteLockFair4() throws InterruptedException { |
532 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
533 |
> |
lock.writeLock().lock(); |
534 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
535 |
> |
public void realRun() { |
536 |
> |
lock.writeLock().lock(); |
537 |
> |
lock.writeLock().unlock(); |
538 |
> |
}}); |
539 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
540 |
> |
public void realRun() { |
541 |
> |
lock.writeLock().lock(); |
542 |
> |
lock.writeLock().unlock(); |
543 |
> |
}}); |
544 |
> |
|
545 |
> |
Thread.sleep(SHORT_DELAY_MS); |
546 |
> |
assertTrue(lock.isWriteLockedByCurrentThread()); |
547 |
> |
assertEquals(1, lock.getWriteHoldCount()); |
548 |
> |
lock.writeLock().lock(); |
549 |
> |
assertEquals(2, lock.getWriteHoldCount()); |
550 |
> |
lock.writeLock().unlock(); |
551 |
> |
lock.writeLock().lock(); |
552 |
> |
lock.writeLock().unlock(); |
553 |
> |
lock.writeLock().unlock(); |
554 |
> |
awaitTermination(t1, LONG_DELAY_MS); |
555 |
> |
awaitTermination(t2, LONG_DELAY_MS); |
556 |
> |
} |
557 |
> |
|
558 |
> |
|
559 |
> |
/** |
560 |
> |
* Read tryLock succeeds if readlocked but not writelocked |
561 |
> |
*/ |
562 |
> |
public void testTryLockWhenReadLocked() throws InterruptedException { |
563 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
564 |
> |
lock.readLock().lock(); |
565 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
566 |
> |
public void realRun() { |
567 |
> |
assertTrue(lock.readLock().tryLock()); |
568 |
> |
lock.readLock().unlock(); |
569 |
> |
}}); |
570 |
> |
|
571 |
> |
awaitTermination(t, LONG_DELAY_MS); |
572 |
> |
lock.readLock().unlock(); |
573 |
> |
} |
574 |
> |
|
575 |
> |
/** |
576 |
> |
* write tryLock fails when readlocked |
577 |
> |
*/ |
578 |
> |
public void testWriteTryLockWhenReadLocked() throws InterruptedException { |
579 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
580 |
> |
lock.readLock().lock(); |
581 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
582 |
> |
public void realRun() { |
583 |
> |
assertFalse(lock.writeLock().tryLock()); |
584 |
> |
}}); |
585 |
> |
|
586 |
> |
awaitTermination(t, LONG_DELAY_MS); |
587 |
> |
lock.readLock().unlock(); |
588 |
> |
} |
589 |
> |
|
590 |
> |
|
591 |
> |
/** |
592 |
> |
* Fair Read tryLock succeeds if readlocked but not writelocked |
593 |
> |
*/ |
594 |
> |
public void testTryLockWhenReadLockedFair() throws InterruptedException { |
595 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
596 |
> |
lock.readLock().lock(); |
597 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
598 |
> |
public void realRun() { |
599 |
> |
assertTrue(lock.readLock().tryLock()); |
600 |
> |
lock.readLock().unlock(); |
601 |
> |
}}); |
602 |
> |
|
603 |
> |
awaitTermination(t, LONG_DELAY_MS); |
604 |
> |
lock.readLock().unlock(); |
605 |
> |
} |
606 |
> |
|
607 |
> |
|
608 |
> |
|
609 |
> |
/** |
610 |
> |
* Fair write tryLock fails when readlocked |
611 |
> |
*/ |
612 |
> |
public void testWriteTryLockWhenReadLockedFair() throws InterruptedException { |
613 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
614 |
> |
lock.readLock().lock(); |
615 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
616 |
> |
public void realRun() { |
617 |
> |
assertFalse(lock.writeLock().tryLock()); |
618 |
> |
}}); |
619 |
> |
|
620 |
> |
awaitTermination(t, LONG_DELAY_MS); |
621 |
> |
lock.readLock().unlock(); |
622 |
> |
} |
623 |
> |
|
624 |
> |
|
625 |
> |
|
626 |
> |
/** |
627 |
> |
* write timed tryLock times out if locked |
628 |
> |
*/ |
629 |
> |
public void testWriteTryLock_Timeout() throws InterruptedException { |
630 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
631 |
> |
lock.writeLock().lock(); |
632 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
633 |
> |
public void realRun() throws InterruptedException { |
634 |
> |
assertFalse(lock.writeLock().tryLock(1, MILLISECONDS)); |
635 |
> |
}}); |
636 |
> |
|
637 |
> |
awaitTermination(t, LONG_DELAY_MS); |
638 |
> |
assertTrue(lock.writeLock().isHeldByCurrentThread()); |
639 |
> |
lock.writeLock().unlock(); |
640 |
> |
} |
641 |
> |
|
642 |
> |
/** |
643 |
> |
* read timed tryLock times out if write-locked |
644 |
> |
*/ |
645 |
> |
public void testReadTryLock_Timeout() throws InterruptedException { |
646 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
647 |
> |
lock.writeLock().lock(); |
648 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
649 |
> |
public void realRun() throws InterruptedException { |
650 |
> |
assertFalse(lock.readLock().tryLock(1, MILLISECONDS)); |
651 |
> |
}}); |
652 |
> |
|
653 |
> |
awaitTermination(t, LONG_DELAY_MS); |
654 |
> |
assertTrue(lock.writeLock().isHeldByCurrentThread()); |
655 |
> |
lock.writeLock().unlock(); |
656 |
> |
} |
657 |
> |
|
658 |
> |
|
659 |
> |
/** |
660 |
> |
* write lockInterruptibly succeeds if lock free else is interruptible |
661 |
> |
*/ |
662 |
> |
public void testWriteLockInterruptibly() throws InterruptedException { |
663 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
664 |
> |
lock.writeLock().lockInterruptibly(); |
665 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
666 |
> |
public void realRun() throws InterruptedException { |
667 |
> |
lock.writeLock().lockInterruptibly(); |
668 |
> |
}}); |
669 |
> |
|
670 |
> |
Thread.sleep(SHORT_DELAY_MS); |
671 |
> |
t.interrupt(); |
672 |
> |
awaitTermination(t, LONG_DELAY_MS); |
673 |
> |
releaseWriteLock(lock); |
674 |
> |
} |
675 |
> |
|
676 |
> |
/** |
677 |
> |
* read lockInterruptibly succeeds if lock free else is interruptible |
678 |
> |
*/ |
679 |
> |
public void testReadLockInterruptibly() throws InterruptedException { |
680 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
681 |
> |
lock.writeLock().lockInterruptibly(); |
682 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
683 |
> |
public void realRun() throws InterruptedException { |
684 |
> |
lock.readLock().lockInterruptibly(); |
685 |
> |
}}); |
686 |
> |
|
687 |
> |
Thread.sleep(SHORT_DELAY_MS); |
688 |
> |
t.interrupt(); |
689 |
> |
awaitTermination(t, LONG_DELAY_MS); |
690 |
> |
releaseWriteLock(lock); |
691 |
> |
} |
692 |
> |
|
693 |
> |
/** |
694 |
> |
* Calling await without holding lock throws IllegalMonitorStateException |
695 |
> |
*/ |
696 |
> |
public void testAwait_IllegalMonitor() throws InterruptedException { |
697 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
698 |
> |
final Condition c = lock.writeLock().newCondition(); |
699 |
> |
try { |
700 |
> |
c.await(); |
701 |
> |
shouldThrow(); |
702 |
> |
} catch (IllegalMonitorStateException success) {} |
703 |
> |
} |
704 |
> |
|
705 |
> |
/** |
706 |
> |
* Calling signal without holding lock throws IllegalMonitorStateException |
707 |
> |
*/ |
708 |
> |
public void testSignal_IllegalMonitor() { |
709 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
710 |
> |
final Condition c = lock.writeLock().newCondition(); |
711 |
> |
try { |
712 |
> |
c.signal(); |
713 |
> |
shouldThrow(); |
714 |
> |
} catch (IllegalMonitorStateException success) {} |
715 |
> |
} |
716 |
> |
|
717 |
> |
/** |
718 |
> |
* awaitNanos without a signal times out |
719 |
> |
*/ |
720 |
> |
public void testAwaitNanos_Timeout() throws InterruptedException { |
721 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
722 |
> |
final Condition c = lock.writeLock().newCondition(); |
723 |
> |
|
724 |
> |
lock.writeLock().lock(); |
725 |
> |
long t = c.awaitNanos(100); |
726 |
> |
assertTrue(t <= 0); |
727 |
> |
lock.writeLock().unlock(); |
728 |
> |
} |
729 |
> |
|
730 |
> |
|
731 |
> |
/** |
732 |
> |
* timed await without a signal times out |
733 |
> |
*/ |
734 |
> |
public void testAwait_Timeout() throws InterruptedException { |
735 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
736 |
> |
final Condition c = lock.writeLock().newCondition(); |
737 |
> |
lock.writeLock().lock(); |
738 |
> |
assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS)); |
739 |
> |
lock.writeLock().unlock(); |
740 |
> |
} |
741 |
> |
|
742 |
> |
/** |
743 |
> |
* awaitUntil without a signal times out |
744 |
> |
*/ |
745 |
> |
public void testAwaitUntil_Timeout() throws InterruptedException { |
746 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
747 |
> |
final Condition c = lock.writeLock().newCondition(); |
748 |
> |
lock.writeLock().lock(); |
749 |
> |
java.util.Date d = new java.util.Date(); |
750 |
> |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
751 |
> |
lock.writeLock().unlock(); |
752 |
> |
} |
753 |
> |
|
754 |
> |
/** |
755 |
> |
* await returns when signalled |
756 |
> |
*/ |
757 |
> |
public void testAwait() throws InterruptedException { |
758 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
759 |
> |
final Condition c = lock.writeLock().newCondition(); |
760 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
761 |
> |
public void realRun() throws InterruptedException { |
762 |
> |
lock.writeLock().lock(); |
763 |
> |
c.await(); |
764 |
> |
lock.writeLock().unlock(); |
765 |
> |
}}); |
766 |
> |
|
767 |
> |
Thread.sleep(SHORT_DELAY_MS); |
768 |
> |
lock.writeLock().lock(); |
769 |
> |
c.signal(); |
770 |
> |
lock.writeLock().unlock(); |
771 |
> |
awaitTermination(t, LONG_DELAY_MS); |
772 |
> |
} |
773 |
> |
|
774 |
> |
/** A helper class for uninterruptible wait tests */ |
775 |
> |
class UninterruptableThread extends Thread { |
776 |
> |
private Lock lock; |
777 |
> |
private Condition c; |
778 |
> |
|
779 |
> |
public volatile boolean canAwake = false; |
780 |
> |
public volatile boolean interrupted = false; |
781 |
> |
public volatile boolean lockStarted = false; |
782 |
> |
|
783 |
> |
public UninterruptableThread(Lock lock, Condition c) { |
784 |
> |
this.lock = lock; |
785 |
> |
this.c = c; |
786 |
> |
} |
787 |
> |
|
788 |
> |
public synchronized void run() { |
789 |
> |
lock.lock(); |
790 |
> |
lockStarted = true; |
791 |
> |
|
792 |
> |
while (!canAwake) { |
793 |
> |
c.awaitUninterruptibly(); |
794 |
> |
} |
795 |
> |
|
796 |
> |
interrupted = isInterrupted(); |
797 |
> |
lock.unlock(); |
798 |
> |
} |
799 |
> |
} |
800 |
> |
|
801 |
> |
/** |
802 |
> |
* awaitUninterruptibly doesn't abort on interrupt |
803 |
> |
*/ |
804 |
> |
public void testAwaitUninterruptibly() throws InterruptedException { |
805 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
806 |
> |
final Condition c = lock.writeLock().newCondition(); |
807 |
> |
UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c); |
808 |
> |
|
809 |
> |
thread.start(); |
810 |
> |
|
811 |
> |
while (!thread.lockStarted) { |
812 |
> |
Thread.sleep(100); |
813 |
> |
} |
814 |
> |
|
815 |
> |
lock.writeLock().lock(); |
816 |
> |
try { |
817 |
> |
thread.interrupt(); |
818 |
> |
thread.canAwake = true; |
819 |
> |
c.signal(); |
820 |
> |
} finally { |
821 |
> |
lock.writeLock().unlock(); |
822 |
> |
} |
823 |
> |
|
824 |
> |
awaitTermination(thread, LONG_DELAY_MS); |
825 |
> |
assertTrue(thread.interrupted); |
826 |
> |
} |
827 |
> |
|
828 |
> |
/** |
829 |
> |
* await is interruptible |
830 |
> |
*/ |
831 |
> |
public void testAwait_Interrupt() throws InterruptedException { |
832 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
833 |
> |
final Condition c = lock.writeLock().newCondition(); |
834 |
> |
final CountDownLatch locked = new CountDownLatch(1); |
835 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
836 |
> |
public void realRun() throws InterruptedException { |
837 |
> |
lock.writeLock().lock(); |
838 |
> |
assertTrue(lock.isWriteLocked()); |
839 |
> |
locked.countDown(); |
840 |
> |
try { c.await(); } |
841 |
> |
finally { lock.writeLock().unlock(); } |
842 |
> |
}}); |
843 |
> |
|
844 |
> |
locked.await(); |
845 |
> |
while (lock.isWriteLocked()) |
846 |
> |
Thread.yield(); |
847 |
> |
t.interrupt(); |
848 |
> |
awaitTermination(t, LONG_DELAY_MS); |
849 |
> |
assertFalse(lock.isWriteLocked()); |
850 |
> |
} |
851 |
> |
|
852 |
> |
/** |
853 |
> |
* awaitNanos is interruptible |
854 |
> |
*/ |
855 |
> |
public void testAwaitNanos_Interrupt() throws InterruptedException { |
856 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
857 |
> |
final Condition c = lock.writeLock().newCondition(); |
858 |
> |
final CountDownLatch locked = new CountDownLatch(1); |
859 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
860 |
> |
public void realRun() throws InterruptedException { |
861 |
> |
lock.writeLock().lock(); |
862 |
> |
assertTrue(lock.isWriteLocked()); |
863 |
> |
locked.countDown(); |
864 |
> |
try { c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS)); } |
865 |
> |
finally { lock.writeLock().unlock(); } |
866 |
> |
}}); |
867 |
> |
|
868 |
> |
locked.await(); |
869 |
> |
while (lock.isWriteLocked()) |
870 |
> |
Thread.yield(); |
871 |
> |
t.interrupt(); |
872 |
> |
awaitTermination(t, LONG_DELAY_MS); |
873 |
> |
assertFalse(lock.isWriteLocked()); |
874 |
> |
} |
875 |
> |
|
876 |
> |
/** |
877 |
> |
* awaitUntil is interruptible |
878 |
> |
*/ |
879 |
> |
public void testAwaitUntil_Interrupt() throws InterruptedException { |
880 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
881 |
> |
final Condition c = lock.writeLock().newCondition(); |
882 |
> |
final CountDownLatch locked = new CountDownLatch(1); |
883 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
884 |
> |
public void realRun() throws InterruptedException { |
885 |
> |
lock.writeLock().lock(); |
886 |
> |
assertTrue(lock.isWriteLocked()); |
887 |
> |
locked.countDown(); |
888 |
> |
java.util.Date d = new java.util.Date(); |
889 |
> |
try { c.awaitUntil(new java.util.Date(d.getTime() + 10000)); } |
890 |
> |
finally { lock.writeLock().unlock(); } |
891 |
> |
}}); |
892 |
> |
|
893 |
> |
locked.await(); |
894 |
> |
while (lock.isWriteLocked()) |
895 |
> |
Thread.yield(); |
896 |
> |
t.interrupt(); |
897 |
> |
awaitTermination(t, LONG_DELAY_MS); |
898 |
> |
assertFalse(lock.isWriteLocked()); |
899 |
> |
} |
900 |
> |
|
901 |
> |
/** |
902 |
> |
* signalAll wakes up all threads |
903 |
> |
*/ |
904 |
> |
public void testSignalAll() throws InterruptedException { |
905 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
906 |
> |
final Condition c = lock.writeLock().newCondition(); |
907 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
908 |
> |
public void realRun() throws InterruptedException { |
909 |
> |
lock.writeLock().lock(); |
910 |
> |
c.await(); |
911 |
> |
lock.writeLock().unlock(); |
912 |
> |
}}); |
913 |
> |
|
914 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
915 |
> |
public void realRun() throws InterruptedException { |
916 |
> |
lock.writeLock().lock(); |
917 |
> |
c.await(); |
918 |
> |
lock.writeLock().unlock(); |
919 |
> |
}}); |
920 |
> |
|
921 |
> |
Thread.sleep(SHORT_DELAY_MS); |
922 |
> |
lock.writeLock().lock(); |
923 |
> |
c.signalAll(); |
924 |
> |
lock.writeLock().unlock(); |
925 |
> |
awaitTermination(t1, LONG_DELAY_MS); |
926 |
> |
awaitTermination(t2, LONG_DELAY_MS); |
927 |
> |
} |
928 |
> |
|
929 |
> |
/** |
930 |
> |
* A serialized lock deserializes as unlocked |
931 |
> |
*/ |
932 |
> |
public void testSerialization() throws Exception { |
933 |
> |
ReentrantReadWriteLock l = new ReentrantReadWriteLock(); |
934 |
> |
l.readLock().lock(); |
935 |
> |
l.readLock().unlock(); |
936 |
> |
|
937 |
> |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
938 |
> |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
939 |
> |
out.writeObject(l); |
940 |
> |
out.close(); |
941 |
> |
|
942 |
> |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
943 |
> |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
944 |
> |
ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject(); |
945 |
> |
r.readLock().lock(); |
946 |
> |
r.readLock().unlock(); |
947 |
> |
} |
948 |
> |
|
949 |
> |
/** |
950 |
> |
* hasQueuedThreads reports whether there are waiting threads |
951 |
> |
*/ |
952 |
> |
public void testhasQueuedThreads() throws InterruptedException { |
953 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
954 |
> |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
955 |
> |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
956 |
> |
assertFalse(lock.hasQueuedThreads()); |
957 |
> |
lock.writeLock().lock(); |
958 |
> |
t1.start(); |
959 |
> |
Thread.sleep(SHORT_DELAY_MS); |
960 |
> |
assertTrue(lock.hasQueuedThreads()); |
961 |
> |
t2.start(); |
962 |
> |
Thread.sleep(SHORT_DELAY_MS); |
963 |
> |
assertTrue(lock.hasQueuedThreads()); |
964 |
> |
t1.interrupt(); |
965 |
> |
Thread.sleep(SHORT_DELAY_MS); |
966 |
> |
assertTrue(lock.hasQueuedThreads()); |
967 |
> |
lock.writeLock().unlock(); |
968 |
> |
Thread.sleep(SHORT_DELAY_MS); |
969 |
> |
assertFalse(lock.hasQueuedThreads()); |
970 |
> |
awaitTermination(t1, LONG_DELAY_MS); |
971 |
> |
awaitTermination(t2, LONG_DELAY_MS); |
972 |
> |
} |
973 |
> |
|
974 |
> |
/** |
975 |
> |
* hasQueuedThread(null) throws NPE |
976 |
> |
*/ |
977 |
> |
public void testHasQueuedThreadNPE() { |
978 |
> |
final ReentrantReadWriteLock sync = new ReentrantReadWriteLock(); |
979 |
> |
try { |
980 |
> |
sync.hasQueuedThread(null); |
981 |
> |
shouldThrow(); |
982 |
> |
} catch (NullPointerException success) {} |
983 |
> |
} |
984 |
> |
|
985 |
> |
/** |
986 |
> |
* hasQueuedThread reports whether a thread is queued. |
987 |
> |
*/ |
988 |
> |
public void testHasQueuedThread() throws InterruptedException { |
989 |
> |
final ReentrantReadWriteLock sync = new ReentrantReadWriteLock(); |
990 |
> |
Thread t1 = new Thread(new InterruptedLockRunnable(sync)); |
991 |
> |
Thread t2 = new Thread(new InterruptibleLockRunnable(sync)); |
992 |
> |
assertFalse(sync.hasQueuedThread(t1)); |
993 |
> |
assertFalse(sync.hasQueuedThread(t2)); |
994 |
> |
sync.writeLock().lock(); |
995 |
> |
t1.start(); |
996 |
> |
Thread.sleep(SHORT_DELAY_MS); |
997 |
> |
assertTrue(sync.hasQueuedThread(t1)); |
998 |
> |
t2.start(); |
999 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1000 |
> |
assertTrue(sync.hasQueuedThread(t1)); |
1001 |
> |
assertTrue(sync.hasQueuedThread(t2)); |
1002 |
> |
t1.interrupt(); |
1003 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1004 |
> |
assertFalse(sync.hasQueuedThread(t1)); |
1005 |
> |
assertTrue(sync.hasQueuedThread(t2)); |
1006 |
> |
sync.writeLock().unlock(); |
1007 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1008 |
> |
assertFalse(sync.hasQueuedThread(t1)); |
1009 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1010 |
> |
assertFalse(sync.hasQueuedThread(t2)); |
1011 |
> |
awaitTermination(t1, LONG_DELAY_MS); |
1012 |
> |
awaitTermination(t2, LONG_DELAY_MS); |
1013 |
> |
} |
1014 |
> |
|
1015 |
> |
|
1016 |
> |
/** |
1017 |
> |
* getQueueLength reports number of waiting threads |
1018 |
> |
*/ |
1019 |
> |
public void testGetQueueLength() throws InterruptedException { |
1020 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1021 |
> |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1022 |
> |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1023 |
> |
assertEquals(0, lock.getQueueLength()); |
1024 |
> |
lock.writeLock().lock(); |
1025 |
> |
t1.start(); |
1026 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1027 |
> |
assertEquals(1, lock.getQueueLength()); |
1028 |
> |
t2.start(); |
1029 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1030 |
> |
assertEquals(2, lock.getQueueLength()); |
1031 |
> |
t1.interrupt(); |
1032 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1033 |
> |
assertEquals(1, lock.getQueueLength()); |
1034 |
> |
lock.writeLock().unlock(); |
1035 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1036 |
> |
assertEquals(0, lock.getQueueLength()); |
1037 |
> |
awaitTermination(t1, LONG_DELAY_MS); |
1038 |
> |
awaitTermination(t2, LONG_DELAY_MS); |
1039 |
> |
} |
1040 |
> |
|
1041 |
> |
/** |
1042 |
> |
* getQueuedThreads includes waiting threads |
1043 |
> |
*/ |
1044 |
> |
public void testGetQueuedThreads() throws InterruptedException { |
1045 |
> |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1046 |
> |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1047 |
> |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1048 |
> |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1049 |
> |
lock.writeLock().lock(); |
1050 |
> |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1051 |
> |
t1.start(); |
1052 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1053 |
> |
assertTrue(lock.getQueuedThreads().contains(t1)); |
1054 |
> |
t2.start(); |
1055 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1056 |
> |
assertTrue(lock.getQueuedThreads().contains(t1)); |
1057 |
> |
assertTrue(lock.getQueuedThreads().contains(t2)); |
1058 |
> |
t1.interrupt(); |
1059 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1060 |
> |
assertFalse(lock.getQueuedThreads().contains(t1)); |
1061 |
> |
assertTrue(lock.getQueuedThreads().contains(t2)); |
1062 |
> |
lock.writeLock().unlock(); |
1063 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1064 |
> |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1065 |
> |
awaitTermination(t1, LONG_DELAY_MS); |
1066 |
> |
awaitTermination(t2, LONG_DELAY_MS); |
1067 |
> |
} |
1068 |
> |
|
1069 |
> |
/** |
1070 |
> |
* hasWaiters throws NPE if null |
1071 |
> |
*/ |
1072 |
> |
public void testHasWaitersNPE() { |
1073 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1074 |
> |
try { |
1075 |
> |
lock.hasWaiters(null); |
1076 |
> |
shouldThrow(); |
1077 |
> |
} catch (NullPointerException success) {} |
1078 |
> |
} |
1079 |
> |
|
1080 |
> |
/** |
1081 |
> |
* getWaitQueueLength throws NPE if null |
1082 |
> |
*/ |
1083 |
> |
public void testGetWaitQueueLengthNPE() { |
1084 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1085 |
> |
try { |
1086 |
> |
lock.getWaitQueueLength(null); |
1087 |
> |
shouldThrow(); |
1088 |
> |
} catch (NullPointerException success) {} |
1089 |
> |
} |
1090 |
> |
|
1091 |
> |
|
1092 |
> |
/** |
1093 |
> |
* getWaitingThreads throws NPE if null |
1094 |
> |
*/ |
1095 |
> |
public void testGetWaitingThreadsNPE() { |
1096 |
> |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1097 |
> |
try { |
1098 |
> |
lock.getWaitingThreads(null); |
1099 |
> |
shouldThrow(); |
1100 |
> |
} catch (NullPointerException success) {} |
1101 |
> |
} |
1102 |
> |
|
1103 |
> |
/** |
1104 |
> |
* hasWaiters throws IAE if not owned |
1105 |
> |
*/ |
1106 |
> |
public void testHasWaitersIAE() { |
1107 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1108 |
> |
final Condition c = lock.writeLock().newCondition(); |
1109 |
> |
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(); |
1110 |
> |
try { |
1111 |
> |
lock2.hasWaiters(c); |
1112 |
> |
shouldThrow(); |
1113 |
> |
} catch (IllegalArgumentException success) {} |
1114 |
> |
} |
1115 |
> |
|
1116 |
> |
/** |
1117 |
> |
* hasWaiters throws IMSE if not locked |
1118 |
> |
*/ |
1119 |
> |
public void testHasWaitersIMSE() { |
1120 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1121 |
> |
final Condition c = lock.writeLock().newCondition(); |
1122 |
> |
try { |
1123 |
> |
lock.hasWaiters(c); |
1124 |
> |
shouldThrow(); |
1125 |
> |
} catch (IllegalMonitorStateException success) {} |
1126 |
> |
} |
1127 |
> |
|
1128 |
> |
|
1129 |
> |
/** |
1130 |
> |
* getWaitQueueLength throws IAE if not owned |
1131 |
> |
*/ |
1132 |
> |
public void testGetWaitQueueLengthIAE() { |
1133 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1134 |
> |
final Condition c = lock.writeLock().newCondition(); |
1135 |
> |
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(); |
1136 |
> |
try { |
1137 |
> |
lock2.getWaitQueueLength(c); |
1138 |
> |
shouldThrow(); |
1139 |
> |
} catch (IllegalArgumentException success) {} |
1140 |
> |
} |
1141 |
> |
|
1142 |
> |
/** |
1143 |
> |
* getWaitQueueLength throws IMSE if not locked |
1144 |
> |
*/ |
1145 |
> |
public void testGetWaitQueueLengthIMSE() { |
1146 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1147 |
> |
final Condition c = lock.writeLock().newCondition(); |
1148 |
> |
try { |
1149 |
> |
lock.getWaitQueueLength(c); |
1150 |
> |
shouldThrow(); |
1151 |
> |
} catch (IllegalMonitorStateException success) {} |
1152 |
> |
} |
1153 |
> |
|
1154 |
> |
|
1155 |
> |
/** |
1156 |
> |
* getWaitingThreads throws IAE if not owned |
1157 |
> |
*/ |
1158 |
> |
public void testGetWaitingThreadsIAE() { |
1159 |
> |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1160 |
> |
final Condition c = lock.writeLock().newCondition(); |
1161 |
> |
final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock(); |
1162 |
> |
try { |
1163 |
> |
lock2.getWaitingThreads(c); |
1164 |
> |
shouldThrow(); |
1165 |
> |
} catch (IllegalArgumentException success) {} |
1166 |
> |
} |
1167 |
> |
|
1168 |
> |
/** |
1169 |
> |
* getWaitingThreads throws IMSE if not locked |
1170 |
> |
*/ |
1171 |
> |
public void testGetWaitingThreadsIMSE() { |
1172 |
> |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1173 |
> |
final Condition c = lock.writeLock().newCondition(); |
1174 |
> |
try { |
1175 |
> |
lock.getWaitingThreads(c); |
1176 |
> |
shouldThrow(); |
1177 |
> |
} catch (IllegalMonitorStateException success) {} |
1178 |
> |
} |
1179 |
> |
|
1180 |
> |
|
1181 |
> |
/** |
1182 |
> |
* hasWaiters returns true when a thread is waiting, else false |
1183 |
> |
*/ |
1184 |
> |
public void testHasWaiters() throws InterruptedException { |
1185 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1186 |
> |
final Condition c = lock.writeLock().newCondition(); |
1187 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
1188 |
> |
public void realRun() throws InterruptedException { |
1189 |
> |
lock.writeLock().lock(); |
1190 |
> |
assertFalse(lock.hasWaiters(c)); |
1191 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
1192 |
> |
c.await(); |
1193 |
> |
lock.writeLock().unlock(); |
1194 |
> |
}}); |
1195 |
> |
|
1196 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1197 |
> |
lock.writeLock().lock(); |
1198 |
> |
assertTrue(lock.hasWaiters(c)); |
1199 |
> |
assertEquals(1, lock.getWaitQueueLength(c)); |
1200 |
> |
c.signal(); |
1201 |
> |
lock.writeLock().unlock(); |
1202 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1203 |
> |
lock.writeLock().lock(); |
1204 |
> |
assertFalse(lock.hasWaiters(c)); |
1205 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
1206 |
> |
lock.writeLock().unlock(); |
1207 |
> |
awaitTermination(t, LONG_DELAY_MS); |
1208 |
> |
} |
1209 |
> |
|
1210 |
> |
/** |
1211 |
> |
* getWaitQueueLength returns number of waiting threads |
1212 |
> |
*/ |
1213 |
> |
public void testGetWaitQueueLength() throws InterruptedException { |
1214 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1215 |
> |
final Condition c = lock.writeLock().newCondition(); |
1216 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
1217 |
> |
public void realRun() throws InterruptedException { |
1218 |
> |
lock.writeLock().lock(); |
1219 |
> |
assertFalse(lock.hasWaiters(c)); |
1220 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
1221 |
> |
c.await(); |
1222 |
> |
lock.writeLock().unlock(); |
1223 |
> |
}}); |
1224 |
> |
|
1225 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1226 |
> |
lock.writeLock().lock(); |
1227 |
> |
assertTrue(lock.hasWaiters(c)); |
1228 |
> |
assertEquals(1, lock.getWaitQueueLength(c)); |
1229 |
> |
c.signal(); |
1230 |
> |
lock.writeLock().unlock(); |
1231 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1232 |
> |
lock.writeLock().lock(); |
1233 |
> |
assertFalse(lock.hasWaiters(c)); |
1234 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
1235 |
> |
lock.writeLock().unlock(); |
1236 |
> |
awaitTermination(t, LONG_DELAY_MS); |
1237 |
> |
} |
1238 |
> |
|
1239 |
> |
|
1240 |
> |
/** |
1241 |
> |
* getWaitingThreads returns only and all waiting threads |
1242 |
> |
*/ |
1243 |
> |
public void testGetWaitingThreads() throws InterruptedException { |
1244 |
> |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1245 |
> |
final Condition c = lock.writeLock().newCondition(); |
1246 |
> |
Thread t1 = new Thread(new CheckedRunnable() { |
1247 |
> |
public void realRun() throws InterruptedException { |
1248 |
> |
lock.writeLock().lock(); |
1249 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1250 |
> |
c.await(); |
1251 |
> |
lock.writeLock().unlock(); |
1252 |
> |
}}); |
1253 |
> |
|
1254 |
> |
Thread t2 = new Thread(new CheckedRunnable() { |
1255 |
> |
public void realRun() throws InterruptedException { |
1256 |
> |
lock.writeLock().lock(); |
1257 |
> |
assertFalse(lock.getWaitingThreads(c).isEmpty()); |
1258 |
> |
c.await(); |
1259 |
> |
lock.writeLock().unlock(); |
1260 |
> |
}}); |
1261 |
> |
|
1262 |
> |
lock.writeLock().lock(); |
1263 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1264 |
> |
lock.writeLock().unlock(); |
1265 |
> |
t1.start(); |
1266 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1267 |
> |
t2.start(); |
1268 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1269 |
> |
lock.writeLock().lock(); |
1270 |
> |
assertTrue(lock.hasWaiters(c)); |
1271 |
> |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
1272 |
> |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
1273 |
> |
c.signalAll(); |
1274 |
> |
lock.writeLock().unlock(); |
1275 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1276 |
> |
lock.writeLock().lock(); |
1277 |
> |
assertFalse(lock.hasWaiters(c)); |
1278 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1279 |
> |
lock.writeLock().unlock(); |
1280 |
> |
awaitTermination(t1, LONG_DELAY_MS); |
1281 |
> |
awaitTermination(t2, LONG_DELAY_MS); |
1282 |
> |
} |
1283 |
> |
|
1284 |
> |
/** |
1285 |
> |
* toString indicates current lock state |
1286 |
> |
*/ |
1287 |
> |
public void testToString() { |
1288 |
> |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1289 |
> |
String us = lock.toString(); |
1290 |
> |
assertTrue(us.indexOf("Write locks = 0") >= 0); |
1291 |
> |
assertTrue(us.indexOf("Read locks = 0") >= 0); |
1292 |
> |
lock.writeLock().lock(); |
1293 |
> |
String ws = lock.toString(); |
1294 |
> |
assertTrue(ws.indexOf("Write locks = 1") >= 0); |
1295 |
> |
assertTrue(ws.indexOf("Read locks = 0") >= 0); |
1296 |
> |
lock.writeLock().unlock(); |
1297 |
> |
lock.readLock().lock(); |
1298 |
> |
lock.readLock().lock(); |
1299 |
> |
String rs = lock.toString(); |
1300 |
> |
assertTrue(rs.indexOf("Write locks = 0") >= 0); |
1301 |
> |
assertTrue(rs.indexOf("Read locks = 2") >= 0); |
1302 |
> |
} |
1303 |
> |
|
1304 |
> |
/** |
1305 |
> |
* readLock.toString indicates current lock state |
1306 |
> |
*/ |
1307 |
> |
public void testReadLockToString() { |
1308 |
> |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1309 |
> |
String us = lock.readLock().toString(); |
1310 |
> |
assertTrue(us.indexOf("Read locks = 0") >= 0); |
1311 |
> |
lock.readLock().lock(); |
1312 |
> |
lock.readLock().lock(); |
1313 |
> |
String rs = lock.readLock().toString(); |
1314 |
> |
assertTrue(rs.indexOf("Read locks = 2") >= 0); |
1315 |
> |
} |
1316 |
> |
|
1317 |
> |
/** |
1318 |
> |
* writeLock.toString indicates current lock state |
1319 |
> |
*/ |
1320 |
> |
public void testWriteLockToString() { |
1321 |
> |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1322 |
> |
String us = lock.writeLock().toString(); |
1323 |
> |
assertTrue(us.indexOf("Unlocked") >= 0); |
1324 |
> |
lock.writeLock().lock(); |
1325 |
> |
String ls = lock.writeLock().toString(); |
1326 |
> |
assertTrue(ls.indexOf("Locked") >= 0); |
1327 |
|
} |
112 |
– |
|
1328 |
|
|
1329 |
|
} |