--- jsr166/src/test/tck/StampedLockTest.java 2013/02/09 19:33:08 1.3 +++ jsr166/src/test/tck/StampedLockTest.java 2013/03/20 16:51:11 1.4 @@ -3,19 +3,16 @@ * with assistance from members of JCP JSR-166 Expert Group and * released to the public domain, as explained at * http://creativecommons.org/publicdomain/zero/1.0/ - * Other contributors include Andrew Wright, Jeffrey Hayes, - * Pat Fisher, Mike Judd. */ import junit.framework.*; import java.util.concurrent.atomic.AtomicBoolean; -import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock; -import java.util.concurrent.locks.ReadWriteLock; import java.util.concurrent.locks.StampedLock; import java.util.concurrent.CountDownLatch; import static java.util.concurrent.TimeUnit.MILLISECONDS; import java.util.*; +import java.util.concurrent.*; public class StampedLockTest extends JSR166TestCase { public static void main(String[] args) { @@ -25,1659 +22,904 @@ public class StampedLockTest extends JSR return new TestSuite(StampedLockTest.class); } - // XXXX Just a skeleton implementation for now. - public void testTODO() { - fail("Please add some real tests!"); - } - - public void testConstructor() { new StampedLock(); } - -// /** -// * A runnable calling lockInterruptibly -// */ -// class InterruptibleLockRunnable extends CheckedRunnable { -// final ReentrantReadWriteLock lock; -// InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; } -// public void realRun() throws InterruptedException { -// lock.writeLock().lockInterruptibly(); -// } -// } - -// /** -// * A runnable calling lockInterruptibly that expects to be -// * interrupted -// */ -// class InterruptedLockRunnable extends CheckedInterruptedRunnable { -// final ReentrantReadWriteLock lock; -// InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; } -// public void realRun() throws InterruptedException { -// lock.writeLock().lockInterruptibly(); -// } -// } - -// /** -// * Subclass to expose protected methods -// */ -// static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock { -// PublicReentrantReadWriteLock() { super(); } -// PublicReentrantReadWriteLock(boolean fair) { super(fair); } -// public Thread getOwner() { -// return super.getOwner(); -// } -// public Collection getQueuedThreads() { -// return super.getQueuedThreads(); -// } -// public Collection getWaitingThreads(Condition c) { -// return super.getWaitingThreads(c); -// } -// } - -// /** -// * Releases write lock, checking that it had a hold count of 1. -// */ -// void releaseWriteLock(PublicReentrantReadWriteLock lock) { -// ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock(); -// assertWriteLockedByMoi(lock); -// assertEquals(1, lock.getWriteHoldCount()); -// writeLock.unlock(); -// assertNotWriteLocked(lock); -// } - -// /** -// * Spin-waits until lock.hasQueuedThread(t) becomes true. -// */ -// void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) { -// long startTime = System.nanoTime(); -// while (!lock.hasQueuedThread(t)) { -// if (millisElapsedSince(startTime) > LONG_DELAY_MS) -// throw new AssertionFailedError("timed out"); -// Thread.yield(); -// } -// assertTrue(t.isAlive()); -// assertTrue(lock.getOwner() != t); -// } - -// /** -// * Checks that lock is not write-locked. -// */ -// void assertNotWriteLocked(PublicReentrantReadWriteLock lock) { -// assertFalse(lock.isWriteLocked()); -// assertFalse(lock.isWriteLockedByCurrentThread()); -// assertFalse(lock.writeLock().isHeldByCurrentThread()); -// assertEquals(0, lock.getWriteHoldCount()); -// assertEquals(0, lock.writeLock().getHoldCount()); -// assertNull(lock.getOwner()); -// } - -// /** -// * Checks that lock is write-locked by the given thread. -// */ -// void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) { -// assertTrue(lock.isWriteLocked()); -// assertSame(t, lock.getOwner()); -// assertEquals(t == Thread.currentThread(), -// lock.isWriteLockedByCurrentThread()); -// assertEquals(t == Thread.currentThread(), -// lock.writeLock().isHeldByCurrentThread()); -// assertEquals(t == Thread.currentThread(), -// lock.getWriteHoldCount() > 0); -// assertEquals(t == Thread.currentThread(), -// lock.writeLock().getHoldCount() > 0); -// assertEquals(0, lock.getReadLockCount()); -// } - -// /** -// * Checks that lock is write-locked by the current thread. -// */ -// void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) { -// assertWriteLockedBy(lock, Thread.currentThread()); -// } - -// /** -// * Checks that condition c has no waiters. -// */ -// void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) { -// assertHasWaiters(lock, c, new Thread[] {}); -// } - -// /** -// * Checks that condition c has exactly the given waiter threads. -// */ -// void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c, -// Thread... threads) { -// lock.writeLock().lock(); -// assertEquals(threads.length > 0, lock.hasWaiters(c)); -// assertEquals(threads.length, lock.getWaitQueueLength(c)); -// assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty()); -// assertEquals(threads.length, lock.getWaitingThreads(c).size()); -// assertEquals(new HashSet(lock.getWaitingThreads(c)), -// new HashSet(Arrays.asList(threads))); -// lock.writeLock().unlock(); -// } - -// enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }; - -// /** -// * Awaits condition using the specified AwaitMethod. -// */ -// void await(Condition c, AwaitMethod awaitMethod) -// throws InterruptedException { -// switch (awaitMethod) { -// case await: -// c.await(); -// break; -// case awaitTimed: -// assertTrue(c.await(2 * LONG_DELAY_MS, MILLISECONDS)); -// break; -// case awaitNanos: -// long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS)); -// assertTrue(nanosRemaining > 0); -// break; -// case awaitUntil: -// java.util.Date d = new java.util.Date(); -// assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS))); -// break; -// } -// } - -// /** -// * Constructor sets given fairness, and is in unlocked state -// */ -// public void testConstructor() { -// PublicReentrantReadWriteLock lock; - -// lock = new PublicReentrantReadWriteLock(); -// assertFalse(lock.isFair()); -// assertNotWriteLocked(lock); -// assertEquals(0, lock.getReadLockCount()); - -// lock = new PublicReentrantReadWriteLock(true); -// assertTrue(lock.isFair()); -// assertNotWriteLocked(lock); -// assertEquals(0, lock.getReadLockCount()); - -// lock = new PublicReentrantReadWriteLock(false); -// assertFalse(lock.isFair()); -// assertNotWriteLocked(lock); -// assertEquals(0, lock.getReadLockCount()); -// } - -// /** -// * write-locking and read-locking an unlocked lock succeed -// */ -// public void testLock() { testLock(false); } -// public void testLock_fair() { testLock(true); } -// public void testLock(boolean fair) { -// PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// assertNotWriteLocked(lock); -// lock.writeLock().lock(); -// assertWriteLockedByMoi(lock); -// lock.writeLock().unlock(); -// assertNotWriteLocked(lock); -// assertEquals(0, lock.getReadLockCount()); -// lock.readLock().lock(); -// assertNotWriteLocked(lock); -// assertEquals(1, lock.getReadLockCount()); -// lock.readLock().unlock(); -// assertNotWriteLocked(lock); -// assertEquals(0, lock.getReadLockCount()); -// } - -// /** -// * getWriteHoldCount returns number of recursive holds -// */ -// public void testGetWriteHoldCount() { testGetWriteHoldCount(false); } -// public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); } -// public void testGetWriteHoldCount(boolean fair) { -// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// for (int i = 1; i <= SIZE; i++) { -// lock.writeLock().lock(); -// assertEquals(i,lock.getWriteHoldCount()); -// } -// for (int i = SIZE; i > 0; i--) { -// lock.writeLock().unlock(); -// assertEquals(i-1,lock.getWriteHoldCount()); -// } -// } - -// /** -// * writelock.getHoldCount returns number of recursive holds -// */ -// public void testGetHoldCount() { testGetHoldCount(false); } -// public void testGetHoldCount_fair() { testGetHoldCount(true); } -// public void testGetHoldCount(boolean fair) { -// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// for (int i = 1; i <= SIZE; i++) { -// lock.writeLock().lock(); -// assertEquals(i,lock.writeLock().getHoldCount()); -// } -// for (int i = SIZE; i > 0; i--) { -// lock.writeLock().unlock(); -// assertEquals(i-1,lock.writeLock().getHoldCount()); -// } -// } - -// /** -// * getReadHoldCount returns number of recursive holds -// */ -// public void testGetReadHoldCount() { testGetReadHoldCount(false); } -// public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); } -// public void testGetReadHoldCount(boolean fair) { -// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// for (int i = 1; i <= SIZE; i++) { -// lock.readLock().lock(); -// assertEquals(i,lock.getReadHoldCount()); -// } -// for (int i = SIZE; i > 0; i--) { -// lock.readLock().unlock(); -// assertEquals(i-1,lock.getReadHoldCount()); -// } -// } - -// /** -// * write-unlocking an unlocked lock throws IllegalMonitorStateException -// */ -// public void testWriteUnlock_IMSE() { testWriteUnlock_IMSE(false); } -// public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); } -// public void testWriteUnlock_IMSE(boolean fair) { -// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// try { -// lock.writeLock().unlock(); -// shouldThrow(); -// } catch (IllegalMonitorStateException success) {} -// } - -// /** -// * read-unlocking an unlocked lock throws IllegalMonitorStateException -// */ -// public void testReadUnlock_IMSE() { testReadUnlock_IMSE(false); } -// public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); } -// public void testReadUnlock_IMSE(boolean fair) { -// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// try { -// lock.readLock().unlock(); -// shouldThrow(); -// } catch (IllegalMonitorStateException success) {} -// } - -// /** -// * write-lockInterruptibly is interruptible -// */ -// public void testWriteLockInterruptibly_Interruptible() { testWriteLockInterruptibly_Interruptible(false); } -// public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); } -// public void testWriteLockInterruptibly_Interruptible(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// Thread t = newStartedThread(new CheckedInterruptedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().lockInterruptibly(); -// }}); - -// waitForQueuedThread(lock, t); -// t.interrupt(); -// awaitTermination(t); -// releaseWriteLock(lock); -// } - -// /** -// * timed write-tryLock is interruptible -// */ -// public void testWriteTryLock_Interruptible() { testWriteTryLock_Interruptible(false); } -// public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); } -// public void testWriteTryLock_Interruptible(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// Thread t = newStartedThread(new CheckedInterruptedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS); -// }}); - -// waitForQueuedThread(lock, t); -// t.interrupt(); -// awaitTermination(t); -// releaseWriteLock(lock); -// } - -// /** -// * read-lockInterruptibly is interruptible -// */ -// public void testReadLockInterruptibly_Interruptible() { testReadLockInterruptibly_Interruptible(false); } -// public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); } -// public void testReadLockInterruptibly_Interruptible(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// Thread t = newStartedThread(new CheckedInterruptedRunnable() { -// public void realRun() throws InterruptedException { -// lock.readLock().lockInterruptibly(); -// }}); - -// waitForQueuedThread(lock, t); -// t.interrupt(); -// awaitTermination(t); -// releaseWriteLock(lock); -// } - -// /** -// * timed read-tryLock is interruptible -// */ -// public void testReadTryLock_Interruptible() { testReadTryLock_Interruptible(false); } -// public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); } -// public void testReadTryLock_Interruptible(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// Thread t = newStartedThread(new CheckedInterruptedRunnable() { -// public void realRun() throws InterruptedException { -// lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS); -// }}); - -// waitForQueuedThread(lock, t); -// t.interrupt(); -// awaitTermination(t); -// releaseWriteLock(lock); -// } - -// /** -// * write-tryLock on an unlocked lock succeeds -// */ -// public void testWriteTryLock() { testWriteTryLock(false); } -// public void testWriteTryLock_fair() { testWriteTryLock(true); } -// public void testWriteTryLock(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// assertTrue(lock.writeLock().tryLock()); -// assertWriteLockedByMoi(lock); -// assertTrue(lock.writeLock().tryLock()); -// assertWriteLockedByMoi(lock); -// lock.writeLock().unlock(); -// releaseWriteLock(lock); -// } - -// /** -// * write-tryLock fails if locked -// */ -// public void testWriteTryLockWhenLocked() { testWriteTryLockWhenLocked(false); } -// public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); } -// public void testWriteTryLockWhenLocked(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// assertFalse(lock.writeLock().tryLock()); -// }}); - -// awaitTermination(t); -// releaseWriteLock(lock); -// } - -// /** -// * read-tryLock fails if locked -// */ -// public void testReadTryLockWhenLocked() { testReadTryLockWhenLocked(false); } -// public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); } -// public void testReadTryLockWhenLocked(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// assertFalse(lock.readLock().tryLock()); -// }}); - -// awaitTermination(t); -// releaseWriteLock(lock); -// } - -// /** -// * Multiple threads can hold a read lock when not write-locked -// */ -// public void testMultipleReadLocks() { testMultipleReadLocks(false); } -// public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); } -// public void testMultipleReadLocks(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// lock.readLock().lock(); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// assertTrue(lock.readLock().tryLock()); -// lock.readLock().unlock(); -// assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS)); -// lock.readLock().unlock(); -// lock.readLock().lock(); -// lock.readLock().unlock(); -// }}); - -// awaitTermination(t); -// lock.readLock().unlock(); -// } - -// /** -// * A writelock succeeds only after a reading thread unlocks -// */ -// public void testWriteAfterReadLock() { testWriteAfterReadLock(false); } -// public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); } -// public void testWriteAfterReadLock(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.readLock().lock(); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// assertEquals(1, lock.getReadLockCount()); -// lock.writeLock().lock(); -// assertEquals(0, lock.getReadLockCount()); -// lock.writeLock().unlock(); -// }}); -// waitForQueuedThread(lock, t); -// assertNotWriteLocked(lock); -// assertEquals(1, lock.getReadLockCount()); -// lock.readLock().unlock(); -// assertEquals(0, lock.getReadLockCount()); -// awaitTermination(t); -// assertNotWriteLocked(lock); -// } - -// /** -// * A writelock succeeds only after reading threads unlock -// */ -// public void testWriteAfterMultipleReadLocks() { testWriteAfterMultipleReadLocks(false); } -// public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); } -// public void testWriteAfterMultipleReadLocks(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.readLock().lock(); -// lock.readLock().lock(); -// Thread t1 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.readLock().lock(); -// assertEquals(3, lock.getReadLockCount()); -// lock.readLock().unlock(); -// }}); -// awaitTermination(t1); - -// Thread t2 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// assertEquals(2, lock.getReadLockCount()); -// lock.writeLock().lock(); -// assertEquals(0, lock.getReadLockCount()); -// lock.writeLock().unlock(); -// }}); -// waitForQueuedThread(lock, t2); -// assertNotWriteLocked(lock); -// assertEquals(2, lock.getReadLockCount()); -// lock.readLock().unlock(); -// lock.readLock().unlock(); -// assertEquals(0, lock.getReadLockCount()); -// awaitTermination(t2); -// assertNotWriteLocked(lock); -// } - -// /** -// * A thread that tries to acquire a fair read lock (non-reentrantly) -// * will block if there is a waiting writer thread -// */ -// public void testReaderWriterReaderFairFifo() { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(true); -// final AtomicBoolean t1GotLock = new AtomicBoolean(false); - -// lock.readLock().lock(); -// Thread t1 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// assertEquals(1, lock.getReadLockCount()); -// lock.writeLock().lock(); -// assertEquals(0, lock.getReadLockCount()); -// t1GotLock.set(true); -// lock.writeLock().unlock(); -// }}); -// waitForQueuedThread(lock, t1); - -// Thread t2 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// assertEquals(1, lock.getReadLockCount()); -// lock.readLock().lock(); -// assertEquals(1, lock.getReadLockCount()); -// assertTrue(t1GotLock.get()); -// lock.readLock().unlock(); -// }}); -// waitForQueuedThread(lock, t2); -// assertTrue(t1.isAlive()); -// assertNotWriteLocked(lock); -// assertEquals(1, lock.getReadLockCount()); -// lock.readLock().unlock(); -// awaitTermination(t1); -// awaitTermination(t2); -// assertNotWriteLocked(lock); -// } - -// /** -// * Readlocks succeed only after a writing thread unlocks -// */ -// public void testReadAfterWriteLock() { testReadAfterWriteLock(false); } -// public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); } -// public void testReadAfterWriteLock(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// Thread t1 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.readLock().lock(); -// lock.readLock().unlock(); -// }}); -// Thread t2 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.readLock().lock(); -// lock.readLock().unlock(); -// }}); - -// waitForQueuedThread(lock, t1); -// waitForQueuedThread(lock, t2); -// releaseWriteLock(lock); -// awaitTermination(t1); -// awaitTermination(t2); -// } - -// /** -// * Read trylock succeeds if write locked by current thread -// */ -// public void testReadHoldingWriteLock() { testReadHoldingWriteLock(false); } -// public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); } -// public void testReadHoldingWriteLock(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// assertTrue(lock.readLock().tryLock()); -// lock.readLock().unlock(); -// lock.writeLock().unlock(); -// } - -// /** -// * Read trylock succeeds (barging) even in the presence of waiting -// * readers and/or writers -// */ -// public void testReadTryLockBarging() { testReadTryLockBarging(false); } -// public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); } -// public void testReadTryLockBarging(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.readLock().lock(); - -// Thread t1 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.writeLock().lock(); -// lock.writeLock().unlock(); -// }}); - -// waitForQueuedThread(lock, t1); - -// Thread t2 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.readLock().lock(); -// lock.readLock().unlock(); -// }}); - -// if (fair) -// waitForQueuedThread(lock, t2); - -// Thread t3 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.readLock().tryLock(); -// lock.readLock().unlock(); -// }}); - -// assertTrue(lock.getReadLockCount() > 0); -// awaitTermination(t3); -// assertTrue(t1.isAlive()); -// if (fair) assertTrue(t2.isAlive()); -// lock.readLock().unlock(); -// awaitTermination(t1); -// awaitTermination(t2); -// } - -// /** -// * Read lock succeeds if write locked by current thread even if -// * other threads are waiting for readlock -// */ -// public void testReadHoldingWriteLock2() { testReadHoldingWriteLock2(false); } -// public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); } -// public void testReadHoldingWriteLock2(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// lock.readLock().lock(); -// lock.readLock().unlock(); - -// Thread t1 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.readLock().lock(); -// lock.readLock().unlock(); -// }}); -// Thread t2 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.readLock().lock(); -// lock.readLock().unlock(); -// }}); - -// waitForQueuedThread(lock, t1); -// waitForQueuedThread(lock, t2); -// assertWriteLockedByMoi(lock); -// lock.readLock().lock(); -// lock.readLock().unlock(); -// releaseWriteLock(lock); -// awaitTermination(t1); -// awaitTermination(t2); -// } - -// /** -// * Read lock succeeds if write locked by current thread even if -// * other threads are waiting for writelock -// */ -// public void testReadHoldingWriteLock3() { testReadHoldingWriteLock3(false); } -// public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); } -// public void testReadHoldingWriteLock3(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// lock.readLock().lock(); -// lock.readLock().unlock(); - -// Thread t1 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.writeLock().lock(); -// lock.writeLock().unlock(); -// }}); -// Thread t2 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.writeLock().lock(); -// lock.writeLock().unlock(); -// }}); - -// waitForQueuedThread(lock, t1); -// waitForQueuedThread(lock, t2); -// assertWriteLockedByMoi(lock); -// lock.readLock().lock(); -// lock.readLock().unlock(); -// assertWriteLockedByMoi(lock); -// lock.writeLock().unlock(); -// awaitTermination(t1); -// awaitTermination(t2); -// } - -// /** -// * Write lock succeeds if write locked by current thread even if -// * other threads are waiting for writelock -// */ -// public void testWriteHoldingWriteLock4() { testWriteHoldingWriteLock4(false); } -// public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); } -// public void testWriteHoldingWriteLock4(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// lock.writeLock().lock(); -// lock.writeLock().unlock(); - -// Thread t1 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.writeLock().lock(); -// lock.writeLock().unlock(); -// }}); -// Thread t2 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// lock.writeLock().lock(); -// lock.writeLock().unlock(); -// }}); - -// waitForQueuedThread(lock, t1); -// waitForQueuedThread(lock, t2); -// assertWriteLockedByMoi(lock); -// assertEquals(1, lock.getWriteHoldCount()); -// lock.writeLock().lock(); -// assertWriteLockedByMoi(lock); -// assertEquals(2, lock.getWriteHoldCount()); -// lock.writeLock().unlock(); -// assertWriteLockedByMoi(lock); -// assertEquals(1, lock.getWriteHoldCount()); -// lock.writeLock().unlock(); -// awaitTermination(t1); -// awaitTermination(t2); -// } - -// /** -// * Read tryLock succeeds if readlocked but not writelocked -// */ -// public void testTryLockWhenReadLocked() { testTryLockWhenReadLocked(false); } -// public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); } -// public void testTryLockWhenReadLocked(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// lock.readLock().lock(); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// assertTrue(lock.readLock().tryLock()); -// lock.readLock().unlock(); -// }}); - -// awaitTermination(t); -// lock.readLock().unlock(); -// } - -// /** -// * write tryLock fails when readlocked -// */ -// public void testWriteTryLockWhenReadLocked() { testWriteTryLockWhenReadLocked(false); } -// public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); } -// public void testWriteTryLockWhenReadLocked(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// lock.readLock().lock(); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// assertFalse(lock.writeLock().tryLock()); -// }}); - -// awaitTermination(t); -// lock.readLock().unlock(); -// } - -// /** -// * write timed tryLock times out if locked -// */ -// public void testWriteTryLock_Timeout() { testWriteTryLock_Timeout(false); } -// public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); } -// public void testWriteTryLock_Timeout(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// long startTime = System.nanoTime(); -// long timeoutMillis = 10; -// assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS)); -// assertTrue(millisElapsedSince(startTime) >= timeoutMillis); -// }}); - -// awaitTermination(t); -// releaseWriteLock(lock); -// } - -// /** -// * read timed tryLock times out if write-locked -// */ -// public void testReadTryLock_Timeout() { testReadTryLock_Timeout(false); } -// public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); } -// public void testReadTryLock_Timeout(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// long startTime = System.nanoTime(); -// long timeoutMillis = 10; -// assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS)); -// assertTrue(millisElapsedSince(startTime) >= timeoutMillis); -// }}); - -// awaitTermination(t); -// assertTrue(lock.writeLock().isHeldByCurrentThread()); -// lock.writeLock().unlock(); -// } - -// /** -// * write lockInterruptibly succeeds if unlocked, else is interruptible -// */ -// public void testWriteLockInterruptibly() { testWriteLockInterruptibly(false); } -// public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); } -// public void testWriteLockInterruptibly(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// try { -// lock.writeLock().lockInterruptibly(); -// } catch (InterruptedException ie) { -// threadUnexpectedException(ie); -// } -// Thread t = newStartedThread(new CheckedInterruptedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().lockInterruptibly(); -// }}); - -// waitForQueuedThread(lock, t); -// t.interrupt(); -// assertTrue(lock.writeLock().isHeldByCurrentThread()); -// awaitTermination(t); -// releaseWriteLock(lock); -// } - -// /** -// * read lockInterruptibly succeeds if lock free else is interruptible -// */ -// public void testReadLockInterruptibly() { testReadLockInterruptibly(false); } -// public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); } -// public void testReadLockInterruptibly(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// try { -// lock.readLock().lockInterruptibly(); -// lock.readLock().unlock(); -// lock.writeLock().lockInterruptibly(); -// } catch (InterruptedException ie) { -// threadUnexpectedException(ie); -// } -// Thread t = newStartedThread(new CheckedInterruptedRunnable() { -// public void realRun() throws InterruptedException { -// lock.readLock().lockInterruptibly(); -// }}); - -// waitForQueuedThread(lock, t); -// t.interrupt(); -// awaitTermination(t); -// releaseWriteLock(lock); -// } - -// /** -// * Calling await without holding lock throws IllegalMonitorStateException -// */ -// public void testAwait_IMSE() { testAwait_IMSE(false); } -// public void testAwait_IMSE_fair() { testAwait_IMSE(true); } -// public void testAwait_IMSE(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// for (AwaitMethod awaitMethod : AwaitMethod.values()) { -// long startTime = System.nanoTime(); -// try { -// await(c, awaitMethod); -// shouldThrow(); -// } catch (IllegalMonitorStateException success) { -// } catch (InterruptedException e) { threadUnexpectedException(e); } -// assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); -// } -// } - -// /** -// * Calling signal without holding lock throws IllegalMonitorStateException -// */ -// public void testSignal_IMSE() { testSignal_IMSE(false); } -// public void testSignal_IMSE_fair() { testSignal_IMSE(true); } -// public void testSignal_IMSE(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// try { -// c.signal(); -// shouldThrow(); -// } catch (IllegalMonitorStateException success) {} -// } - -// /** -// * Calling signalAll without holding lock throws IllegalMonitorStateException -// */ -// public void testSignalAll_IMSE() { testSignalAll_IMSE(false); } -// public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); } -// public void testSignalAll_IMSE(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// try { -// c.signalAll(); -// shouldThrow(); -// } catch (IllegalMonitorStateException success) {} -// } - -// /** -// * awaitNanos without a signal times out -// */ -// public void testAwaitNanos_Timeout() { testAwaitNanos_Timeout(false); } -// public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); } -// public void testAwaitNanos_Timeout(boolean fair) { -// try { -// final ReentrantReadWriteLock lock = -// new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// lock.writeLock().lock(); -// long startTime = System.nanoTime(); -// long timeoutMillis = 10; -// long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); -// long nanosRemaining = c.awaitNanos(timeoutNanos); -// assertTrue(nanosRemaining <= 0); -// assertTrue(millisElapsedSince(startTime) >= timeoutMillis); -// lock.writeLock().unlock(); -// } catch (InterruptedException e) { -// threadUnexpectedException(e); -// } -// } - -// /** -// * timed await without a signal times out -// */ -// public void testAwait_Timeout() { testAwait_Timeout(false); } -// public void testAwait_Timeout_fair() { testAwait_Timeout(true); } -// public void testAwait_Timeout(boolean fair) { -// try { -// final ReentrantReadWriteLock lock = -// new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// lock.writeLock().lock(); -// long startTime = System.nanoTime(); -// long timeoutMillis = 10; -// assertFalse(c.await(timeoutMillis, MILLISECONDS)); -// assertTrue(millisElapsedSince(startTime) >= timeoutMillis); -// lock.writeLock().unlock(); -// } catch (InterruptedException e) { -// threadUnexpectedException(e); -// } -// } - -// /** -// * awaitUntil without a signal times out -// */ -// public void testAwaitUntil_Timeout() { testAwaitUntil_Timeout(false); } -// public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); } -// public void testAwaitUntil_Timeout(boolean fair) { -// try { -// final ReentrantReadWriteLock lock = -// new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// lock.writeLock().lock(); -// long startTime = System.nanoTime(); -// long timeoutMillis = 10; -// java.util.Date d = new java.util.Date(); -// assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis))); -// assertTrue(millisElapsedSince(startTime) >= timeoutMillis); -// lock.writeLock().unlock(); -// } catch (InterruptedException e) { -// threadUnexpectedException(e); -// } -// } - -// /** -// * await returns when signalled -// */ -// public void testAwait() { testAwait(false); } -// public void testAwait_fair() { testAwait(true); } -// public void testAwait(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final CountDownLatch locked = new CountDownLatch(1); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().lock(); -// locked.countDown(); -// c.await(); -// lock.writeLock().unlock(); -// }}); - -// await(locked); -// lock.writeLock().lock(); -// assertHasWaiters(lock, c, t); -// c.signal(); -// assertHasNoWaiters(lock, c); -// assertTrue(t.isAlive()); -// lock.writeLock().unlock(); -// awaitTermination(t); -// } - -// /** -// * awaitUninterruptibly is uninterruptible -// */ -// public void testAwaitUninterruptibly() { testAwaitUninterruptibly(false); } -// public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); } -// public void testAwaitUninterruptibly(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final CountDownLatch pleaseInterrupt = new CountDownLatch(2); - -// Thread t1 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// // Interrupt before awaitUninterruptibly -// lock.writeLock().lock(); -// pleaseInterrupt.countDown(); -// Thread.currentThread().interrupt(); -// c.awaitUninterruptibly(); -// assertTrue(Thread.interrupted()); -// lock.writeLock().unlock(); -// }}); - -// Thread t2 = newStartedThread(new CheckedRunnable() { -// public void realRun() { -// // Interrupt during awaitUninterruptibly -// lock.writeLock().lock(); -// pleaseInterrupt.countDown(); -// c.awaitUninterruptibly(); -// assertTrue(Thread.interrupted()); -// lock.writeLock().unlock(); -// }}); - -// await(pleaseInterrupt); -// lock.writeLock().lock(); -// lock.writeLock().unlock(); -// t2.interrupt(); - -// assertThreadStaysAlive(t1); -// assertTrue(t2.isAlive()); - -// lock.writeLock().lock(); -// c.signalAll(); -// lock.writeLock().unlock(); - -// awaitTermination(t1); -// awaitTermination(t2); -// } - -// /** -// * await/awaitNanos/awaitUntil is interruptible -// */ -// public void testInterruptible_await() { testInterruptible(false, AwaitMethod.await); } -// public void testInterruptible_await_fair() { testInterruptible(true, AwaitMethod.await); } -// public void testInterruptible_awaitTimed() { testInterruptible(false, AwaitMethod.awaitTimed); } -// public void testInterruptible_awaitTimed_fair() { testInterruptible(true, AwaitMethod.awaitTimed); } -// public void testInterruptible_awaitNanos() { testInterruptible(false, AwaitMethod.awaitNanos); } -// public void testInterruptible_awaitNanos_fair() { testInterruptible(true, AwaitMethod.awaitNanos); } -// public void testInterruptible_awaitUntil() { testInterruptible(false, AwaitMethod.awaitUntil); } -// public void testInterruptible_awaitUntil_fair() { testInterruptible(true, AwaitMethod.awaitUntil); } -// public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final CountDownLatch locked = new CountDownLatch(1); -// Thread t = newStartedThread(new CheckedInterruptedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().lock(); -// assertWriteLockedByMoi(lock); -// assertHasNoWaiters(lock, c); -// locked.countDown(); -// try { -// await(c, awaitMethod); -// } finally { -// assertWriteLockedByMoi(lock); -// assertHasNoWaiters(lock, c); -// lock.writeLock().unlock(); -// assertFalse(Thread.interrupted()); -// } -// }}); - -// await(locked); -// assertHasWaiters(lock, c, t); -// t.interrupt(); -// awaitTermination(t); -// assertNotWriteLocked(lock); -// } - -// /** -// * signalAll wakes up all threads -// */ -// public void testSignalAll_await() { testSignalAll(false, AwaitMethod.await); } -// public void testSignalAll_await_fair() { testSignalAll(true, AwaitMethod.await); } -// public void testSignalAll_awaitTimed() { testSignalAll(false, AwaitMethod.awaitTimed); } -// public void testSignalAll_awaitTimed_fair() { testSignalAll(true, AwaitMethod.awaitTimed); } -// public void testSignalAll_awaitNanos() { testSignalAll(false, AwaitMethod.awaitNanos); } -// public void testSignalAll_awaitNanos_fair() { testSignalAll(true, AwaitMethod.awaitNanos); } -// public void testSignalAll_awaitUntil() { testSignalAll(false, AwaitMethod.awaitUntil); } -// public void testSignalAll_awaitUntil_fair() { testSignalAll(true, AwaitMethod.awaitUntil); } -// public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final CountDownLatch locked = new CountDownLatch(2); -// final Lock writeLock = lock.writeLock(); -// class Awaiter extends CheckedRunnable { -// public void realRun() throws InterruptedException { -// writeLock.lock(); -// locked.countDown(); -// await(c, awaitMethod); -// writeLock.unlock(); -// } -// } - -// Thread t1 = newStartedThread(new Awaiter()); -// Thread t2 = newStartedThread(new Awaiter()); - -// await(locked); -// writeLock.lock(); -// assertHasWaiters(lock, c, t1, t2); -// c.signalAll(); -// assertHasNoWaiters(lock, c); -// writeLock.unlock(); -// awaitTermination(t1); -// awaitTermination(t2); -// } - -// /** -// * signal wakes up waiting threads in FIFO order -// */ -// public void testSignalWakesFifo() { testSignalWakesFifo(false); } -// public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); } -// public void testSignalWakesFifo(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final CountDownLatch locked1 = new CountDownLatch(1); -// final CountDownLatch locked2 = new CountDownLatch(1); -// final Lock writeLock = lock.writeLock(); -// Thread t1 = newStartedThread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// writeLock.lock(); -// locked1.countDown(); -// c.await(); -// writeLock.unlock(); -// }}); - -// await(locked1); - -// Thread t2 = newStartedThread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// writeLock.lock(); -// locked2.countDown(); -// c.await(); -// writeLock.unlock(); -// }}); - -// await(locked2); - -// writeLock.lock(); -// assertHasWaiters(lock, c, t1, t2); -// assertFalse(lock.hasQueuedThreads()); -// c.signal(); -// assertHasWaiters(lock, c, t2); -// assertTrue(lock.hasQueuedThread(t1)); -// assertFalse(lock.hasQueuedThread(t2)); -// c.signal(); -// assertHasNoWaiters(lock, c); -// assertTrue(lock.hasQueuedThread(t1)); -// assertTrue(lock.hasQueuedThread(t2)); -// writeLock.unlock(); -// awaitTermination(t1); -// awaitTermination(t2); -// } - -// /** -// * await after multiple reentrant locking preserves lock count -// */ -// public void testAwaitLockCount() { testAwaitLockCount(false); } -// public void testAwaitLockCount_fair() { testAwaitLockCount(true); } -// public void testAwaitLockCount(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final CountDownLatch locked = new CountDownLatch(2); -// Thread t1 = newStartedThread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().lock(); -// assertWriteLockedByMoi(lock); -// assertEquals(1, lock.writeLock().getHoldCount()); -// locked.countDown(); -// c.await(); -// assertWriteLockedByMoi(lock); -// assertEquals(1, lock.writeLock().getHoldCount()); -// lock.writeLock().unlock(); -// }}); - -// Thread t2 = newStartedThread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().lock(); -// lock.writeLock().lock(); -// assertWriteLockedByMoi(lock); -// assertEquals(2, lock.writeLock().getHoldCount()); -// locked.countDown(); -// c.await(); -// assertWriteLockedByMoi(lock); -// assertEquals(2, lock.writeLock().getHoldCount()); -// lock.writeLock().unlock(); -// lock.writeLock().unlock(); -// }}); - -// await(locked); -// lock.writeLock().lock(); -// assertHasWaiters(lock, c, t1, t2); -// c.signalAll(); -// assertHasNoWaiters(lock, c); -// lock.writeLock().unlock(); -// awaitTermination(t1); -// awaitTermination(t2); -// } - -// /** -// * A serialized lock deserializes as unlocked -// */ -// public void testSerialization() { testSerialization(false); } -// public void testSerialization_fair() { testSerialization(true); } -// public void testSerialization(boolean fair) { -// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// lock.writeLock().lock(); -// lock.readLock().lock(); - -// ReentrantReadWriteLock clone = serialClone(lock); -// assertEquals(lock.isFair(), clone.isFair()); -// assertTrue(lock.isWriteLocked()); -// assertFalse(clone.isWriteLocked()); -// assertEquals(1, lock.getReadLockCount()); -// assertEquals(0, clone.getReadLockCount()); -// clone.writeLock().lock(); -// clone.readLock().lock(); -// assertTrue(clone.isWriteLocked()); -// assertEquals(1, clone.getReadLockCount()); -// clone.readLock().unlock(); -// clone.writeLock().unlock(); -// assertFalse(clone.isWriteLocked()); -// assertEquals(1, lock.getReadLockCount()); -// assertEquals(0, clone.getReadLockCount()); -// } - -// /** -// * hasQueuedThreads reports whether there are waiting threads -// */ -// public void testHasQueuedThreads() { testHasQueuedThreads(false); } -// public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); } -// public void testHasQueuedThreads(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// Thread t1 = new Thread(new InterruptedLockRunnable(lock)); -// Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); -// assertFalse(lock.hasQueuedThreads()); -// lock.writeLock().lock(); -// assertFalse(lock.hasQueuedThreads()); -// t1.start(); -// waitForQueuedThread(lock, t1); -// assertTrue(lock.hasQueuedThreads()); -// t2.start(); -// waitForQueuedThread(lock, t2); -// assertTrue(lock.hasQueuedThreads()); -// t1.interrupt(); -// awaitTermination(t1); -// assertTrue(lock.hasQueuedThreads()); -// lock.writeLock().unlock(); -// awaitTermination(t2); -// assertFalse(lock.hasQueuedThreads()); -// } - -// /** -// * hasQueuedThread(null) throws NPE -// */ -// public void testHasQueuedThreadNPE() { testHasQueuedThreadNPE(false); } -// public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); } -// public void testHasQueuedThreadNPE(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// try { -// lock.hasQueuedThread(null); -// shouldThrow(); -// } catch (NullPointerException success) {} -// } - -// /** -// * hasQueuedThread reports whether a thread is queued -// */ -// public void testHasQueuedThread() { testHasQueuedThread(false); } -// public void testHasQueuedThread_fair() { testHasQueuedThread(true); } -// public void testHasQueuedThread(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// Thread t1 = new Thread(new InterruptedLockRunnable(lock)); -// Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); -// assertFalse(lock.hasQueuedThread(t1)); -// assertFalse(lock.hasQueuedThread(t2)); -// lock.writeLock().lock(); -// t1.start(); -// waitForQueuedThread(lock, t1); -// assertTrue(lock.hasQueuedThread(t1)); -// assertFalse(lock.hasQueuedThread(t2)); -// t2.start(); -// waitForQueuedThread(lock, t2); -// assertTrue(lock.hasQueuedThread(t1)); -// assertTrue(lock.hasQueuedThread(t2)); -// t1.interrupt(); -// awaitTermination(t1); -// assertFalse(lock.hasQueuedThread(t1)); -// assertTrue(lock.hasQueuedThread(t2)); -// lock.writeLock().unlock(); -// awaitTermination(t2); -// assertFalse(lock.hasQueuedThread(t1)); -// assertFalse(lock.hasQueuedThread(t2)); -// } - -// /** -// * getQueueLength reports number of waiting threads -// */ -// public void testGetQueueLength() { testGetQueueLength(false); } -// public void testGetQueueLength_fair() { testGetQueueLength(true); } -// public void testGetQueueLength(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// Thread t1 = new Thread(new InterruptedLockRunnable(lock)); -// Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); -// assertEquals(0, lock.getQueueLength()); -// lock.writeLock().lock(); -// t1.start(); -// waitForQueuedThread(lock, t1); -// assertEquals(1, lock.getQueueLength()); -// t2.start(); -// waitForQueuedThread(lock, t2); -// assertEquals(2, lock.getQueueLength()); -// t1.interrupt(); -// awaitTermination(t1); -// assertEquals(1, lock.getQueueLength()); -// lock.writeLock().unlock(); -// awaitTermination(t2); -// assertEquals(0, lock.getQueueLength()); -// } - -// /** -// * getQueuedThreads includes waiting threads -// */ -// public void testGetQueuedThreads() { testGetQueuedThreads(false); } -// public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); } -// public void testGetQueuedThreads(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// Thread t1 = new Thread(new InterruptedLockRunnable(lock)); -// Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); -// assertTrue(lock.getQueuedThreads().isEmpty()); -// lock.writeLock().lock(); -// assertTrue(lock.getQueuedThreads().isEmpty()); -// t1.start(); -// waitForQueuedThread(lock, t1); -// assertEquals(1, lock.getQueuedThreads().size()); -// assertTrue(lock.getQueuedThreads().contains(t1)); -// t2.start(); -// waitForQueuedThread(lock, t2); -// assertEquals(2, lock.getQueuedThreads().size()); -// assertTrue(lock.getQueuedThreads().contains(t1)); -// assertTrue(lock.getQueuedThreads().contains(t2)); -// t1.interrupt(); -// awaitTermination(t1); -// assertFalse(lock.getQueuedThreads().contains(t1)); -// assertTrue(lock.getQueuedThreads().contains(t2)); -// assertEquals(1, lock.getQueuedThreads().size()); -// lock.writeLock().unlock(); -// awaitTermination(t2); -// assertTrue(lock.getQueuedThreads().isEmpty()); -// } - -// /** -// * hasWaiters throws NPE if null -// */ -// public void testHasWaitersNPE() { testHasWaitersNPE(false); } -// public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); } -// public void testHasWaitersNPE(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// try { -// lock.hasWaiters(null); -// shouldThrow(); -// } catch (NullPointerException success) {} -// } - -// /** -// * getWaitQueueLength throws NPE if null -// */ -// public void testGetWaitQueueLengthNPE() { testGetWaitQueueLengthNPE(false); } -// public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); } -// public void testGetWaitQueueLengthNPE(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// try { -// lock.getWaitQueueLength(null); -// shouldThrow(); -// } catch (NullPointerException success) {} -// } - -// /** -// * getWaitingThreads throws NPE if null -// */ -// public void testGetWaitingThreadsNPE() { testGetWaitingThreadsNPE(false); } -// public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); } -// public void testGetWaitingThreadsNPE(boolean fair) { -// final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair); -// try { -// lock.getWaitingThreads(null); -// shouldThrow(); -// } catch (NullPointerException success) {} -// } - -// /** -// * hasWaiters throws IllegalArgumentException if not owned -// */ -// public void testHasWaitersIAE() { testHasWaitersIAE(false); } -// public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); } -// public void testHasWaitersIAE(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair); -// try { -// lock2.hasWaiters(c); -// shouldThrow(); -// } catch (IllegalArgumentException success) {} -// } - -// /** -// * hasWaiters throws IllegalMonitorStateException if not locked -// */ -// public void testHasWaitersIMSE() { testHasWaitersIMSE(false); } -// public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); } -// public void testHasWaitersIMSE(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// try { -// lock.hasWaiters(c); -// shouldThrow(); -// } catch (IllegalMonitorStateException success) {} -// } - -// /** -// * getWaitQueueLength throws IllegalArgumentException if not owned -// */ -// public void testGetWaitQueueLengthIAE() { testGetWaitQueueLengthIAE(false); } -// public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); } -// public void testGetWaitQueueLengthIAE(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair); -// try { -// lock2.getWaitQueueLength(c); -// shouldThrow(); -// } catch (IllegalArgumentException success) {} -// } - -// /** -// * getWaitQueueLength throws IllegalMonitorStateException if not locked -// */ -// public void testGetWaitQueueLengthIMSE() { testGetWaitQueueLengthIMSE(false); } -// public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); } -// public void testGetWaitQueueLengthIMSE(boolean fair) { -// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// try { -// lock.getWaitQueueLength(c); -// shouldThrow(); -// } catch (IllegalMonitorStateException success) {} -// } - -// /** -// * getWaitingThreads throws IllegalArgumentException if not owned -// */ -// public void testGetWaitingThreadsIAE() { testGetWaitingThreadsIAE(false); } -// public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); } -// public void testGetWaitingThreadsIAE(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final PublicReentrantReadWriteLock lock2 = -// new PublicReentrantReadWriteLock(fair); -// try { -// lock2.getWaitingThreads(c); -// shouldThrow(); -// } catch (IllegalArgumentException success) {} -// } - -// /** -// * getWaitingThreads throws IllegalMonitorStateException if not locked -// */ -// public void testGetWaitingThreadsIMSE() { testGetWaitingThreadsIMSE(false); } -// public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); } -// public void testGetWaitingThreadsIMSE(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// try { -// lock.getWaitingThreads(c); -// shouldThrow(); -// } catch (IllegalMonitorStateException success) {} -// } - -// /** -// * hasWaiters returns true when a thread is waiting, else false -// */ -// public void testHasWaiters() { testHasWaiters(false); } -// public void testHasWaiters_fair() { testHasWaiters(true); } -// public void testHasWaiters(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final CountDownLatch locked = new CountDownLatch(1); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().lock(); -// assertHasNoWaiters(lock, c); -// assertFalse(lock.hasWaiters(c)); -// locked.countDown(); -// c.await(); -// assertHasNoWaiters(lock, c); -// assertFalse(lock.hasWaiters(c)); -// lock.writeLock().unlock(); -// }}); - -// await(locked); -// lock.writeLock().lock(); -// assertHasWaiters(lock, c, t); -// assertTrue(lock.hasWaiters(c)); -// c.signal(); -// assertHasNoWaiters(lock, c); -// assertFalse(lock.hasWaiters(c)); -// lock.writeLock().unlock(); -// awaitTermination(t); -// assertHasNoWaiters(lock, c); -// } - -// /** -// * getWaitQueueLength returns number of waiting threads -// */ -// public void testGetWaitQueueLength() { testGetWaitQueueLength(false); } -// public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); } -// public void testGetWaitQueueLength(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final CountDownLatch locked = new CountDownLatch(1); -// Thread t = newStartedThread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().lock(); -// assertEquals(0, lock.getWaitQueueLength(c)); -// locked.countDown(); -// c.await(); -// lock.writeLock().unlock(); -// }}); - -// await(locked); -// lock.writeLock().lock(); -// assertHasWaiters(lock, c, t); -// assertEquals(1, lock.getWaitQueueLength(c)); -// c.signal(); -// assertHasNoWaiters(lock, c); -// assertEquals(0, lock.getWaitQueueLength(c)); -// lock.writeLock().unlock(); -// awaitTermination(t); -// } - -// /** -// * getWaitingThreads returns only and all waiting threads -// */ -// public void testGetWaitingThreads() { testGetWaitingThreads(false); } -// public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); } -// public void testGetWaitingThreads(boolean fair) { -// final PublicReentrantReadWriteLock lock = -// new PublicReentrantReadWriteLock(fair); -// final Condition c = lock.writeLock().newCondition(); -// final CountDownLatch locked1 = new CountDownLatch(1); -// final CountDownLatch locked2 = new CountDownLatch(1); -// Thread t1 = new Thread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().lock(); -// assertTrue(lock.getWaitingThreads(c).isEmpty()); -// locked1.countDown(); -// c.await(); -// lock.writeLock().unlock(); -// }}); - -// Thread t2 = new Thread(new CheckedRunnable() { -// public void realRun() throws InterruptedException { -// lock.writeLock().lock(); -// assertFalse(lock.getWaitingThreads(c).isEmpty()); -// locked2.countDown(); -// c.await(); -// lock.writeLock().unlock(); -// }}); - -// lock.writeLock().lock(); -// assertTrue(lock.getWaitingThreads(c).isEmpty()); -// lock.writeLock().unlock(); - -// t1.start(); -// await(locked1); -// t2.start(); -// await(locked2); - -// lock.writeLock().lock(); -// assertTrue(lock.hasWaiters(c)); -// assertTrue(lock.getWaitingThreads(c).contains(t1)); -// assertTrue(lock.getWaitingThreads(c).contains(t2)); -// assertEquals(2, lock.getWaitingThreads(c).size()); -// c.signalAll(); -// assertHasNoWaiters(lock, c); -// lock.writeLock().unlock(); - -// awaitTermination(t1); -// awaitTermination(t2); - -// assertHasNoWaiters(lock, c); -// } - -// /** -// * toString indicates current lock state -// */ -// public void testToString() { testToString(false); } -// public void testToString_fair() { testToString(true); } -// public void testToString(boolean fair) { -// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// assertTrue(lock.toString().contains("Write locks = 0")); -// assertTrue(lock.toString().contains("Read locks = 0")); -// lock.writeLock().lock(); -// assertTrue(lock.toString().contains("Write locks = 1")); -// assertTrue(lock.toString().contains("Read locks = 0")); -// lock.writeLock().unlock(); -// lock.readLock().lock(); -// lock.readLock().lock(); -// assertTrue(lock.toString().contains("Write locks = 0")); -// assertTrue(lock.toString().contains("Read locks = 2")); -// } - -// /** -// * readLock.toString indicates current lock state -// */ -// public void testReadLockToString() { testReadLockToString(false); } -// public void testReadLockToString_fair() { testReadLockToString(true); } -// public void testReadLockToString(boolean fair) { -// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// assertTrue(lock.readLock().toString().contains("Read locks = 0")); -// lock.readLock().lock(); -// lock.readLock().lock(); -// assertTrue(lock.readLock().toString().contains("Read locks = 2")); -// } - -// /** -// * writeLock.toString indicates current lock state -// */ -// public void testWriteLockToString() { testWriteLockToString(false); } -// public void testWriteLockToString_fair() { testWriteLockToString(true); } -// public void testWriteLockToString(boolean fair) { -// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); -// assertTrue(lock.writeLock().toString().contains("Unlocked")); -// lock.writeLock().lock(); -// assertTrue(lock.writeLock().toString().contains("Locked")); -// lock.writeLock().unlock(); -// assertTrue(lock.writeLock().toString().contains("Unlocked")); -// } + /** + * A runnable calling writeLockInterruptibly + */ + class InterruptibleLockRunnable extends CheckedRunnable { + final StampedLock lock; + InterruptibleLockRunnable(StampedLock l) { lock = l; } + public void realRun() throws InterruptedException { + lock.writeLockInterruptibly(); + } + } + + /** + * A runnable calling writeLockInterruptibly that expects to be + * interrupted + */ + class InterruptedLockRunnable extends CheckedInterruptedRunnable { + final StampedLock lock; + InterruptedLockRunnable(StampedLock l) { lock = l; } + public void realRun() throws InterruptedException { + lock.writeLockInterruptibly(); + } + } + + /** + * Releases write lock, checking isWriteLocked before and after + */ + void releaseWriteLock(StampedLock lock, long s) { + assertTrue(lock.isWriteLocked()); + lock.unlockWrite(s); + assertFalse(lock.isWriteLocked()); + } + + /** + * Constructed StampedLock is in unlocked state + */ + public void testConstructor() { + StampedLock lock; + lock = new StampedLock(); + assertFalse(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + } + + /** + * write-locking and read-locking an unlocked lock succeed + */ + public void testLock() { + StampedLock lock = new StampedLock(); + assertFalse(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + long s = lock.writeLock(); + assertTrue(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + lock.unlockWrite(s); + assertFalse(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + long rs = lock.readLock(); + assertFalse(lock.isWriteLocked()); + assertTrue(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 1); + lock.unlockRead(rs); + assertFalse(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + } + + /** + * unlock releases either a read or write lock + */ + public void testUnlock() { + StampedLock lock = new StampedLock(); + assertFalse(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + long s = lock.writeLock(); + assertTrue(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + lock.unlock(s); + assertFalse(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + long rs = lock.readLock(); + assertFalse(lock.isWriteLocked()); + assertTrue(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 1); + lock.unlock(rs); + assertFalse(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + } + + /** + * tryUnlockRead/Write succeeds if locked in associated mode else + * returns false + */ + public void testTryUnlock() { + StampedLock lock = new StampedLock(); + assertFalse(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + long s = lock.writeLock(); + assertTrue(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + assertFalse(lock.tryUnlockRead()); + assertTrue(lock.tryUnlockWrite()); + assertFalse(lock.tryUnlockWrite()); + assertFalse(lock.tryUnlockRead()); + assertFalse(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + long rs = lock.readLock(); + assertFalse(lock.isWriteLocked()); + assertTrue(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 1); + assertFalse(lock.tryUnlockWrite()); + assertTrue(lock.tryUnlockRead()); + assertFalse(lock.tryUnlockRead()); + assertFalse(lock.tryUnlockWrite()); + assertFalse(lock.isWriteLocked()); + assertFalse(lock.isReadLocked()); + assertEquals(lock.getReadLockCount(), 0); + } + + /** + * write-unlocking an unlocked lock throws IllegalMonitorStateException + */ + public void testWriteUnlock_IMSE() { + StampedLock lock = new StampedLock(); + try { + lock.unlockWrite(0L); + shouldThrow(); + } catch (IllegalMonitorStateException success) {} + } + + /** + * write-unlocking an unlocked lock throws IllegalMonitorStateException + */ + public void testWriteUnlock_IMSE2() { + StampedLock lock = new StampedLock(); + try { + long s = lock.writeLock(); + lock.unlockWrite(s); + lock.unlockWrite(s); + shouldThrow(); + } catch (IllegalMonitorStateException success) {} + } + + /** + * write-unlocking after readlock throws IllegalMonitorStateException + */ + public void testWriteUnlock_IMSE3() { + StampedLock lock = new StampedLock(); + try { + long s = lock.readLock(); + lock.unlockWrite(s); + shouldThrow(); + } catch (IllegalMonitorStateException success) {} + } + + /** + * read-unlocking an unlocked lock throws IllegalMonitorStateException + */ + public void testReadUnlock_IMSE() { + StampedLock lock = new StampedLock(); + try { + long s = lock.readLock(); + lock.unlockRead(s); + lock.unlockRead(s); + shouldThrow(); + } catch (IllegalMonitorStateException success) {} + } + + /** + * read-unlocking an unlocked lock throws IllegalMonitorStateException + */ + public void testReadUnlock_IMSE2() { + StampedLock lock = new StampedLock(); + try { + lock.unlockRead(0L); + shouldThrow(); + } catch (IllegalMonitorStateException success) {} + } + + /** + * read-unlocking after writeLock throws IllegalMonitorStateException + */ + public void testReadUnlock_IMSE3() { + StampedLock lock = new StampedLock(); + try { + long s = lock.writeLock(); + lock.unlockRead(s); + shouldThrow(); + } catch (IllegalMonitorStateException success) {} + } + + /** + * validate(0) fails + */ + public void testValidate0() { + StampedLock lock = new StampedLock(); + assertFalse(lock.validate(0L)); + } + + /** + * A stamp obtained from a successful lock operation validates + */ + public void testValidate() { + try { + StampedLock lock = new StampedLock(); + long s = lock.writeLock(); + assertTrue(lock.validate(s)); + lock.unlockWrite(s); + s = lock.readLock(); + assertTrue(lock.validate(s)); + lock.unlockRead(s); + assertTrue((s = lock.tryWriteLock()) != 0L); + assertTrue(lock.validate(s)); + lock.unlockWrite(s); + assertTrue((s = lock.tryReadLock()) != 0L); + assertTrue(lock.validate(s)); + lock.unlockRead(s); + assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); + assertTrue(lock.validate(s)); + lock.unlockWrite(s); + assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); + assertTrue(lock.validate(s)); + lock.unlockRead(s); + assertTrue((s = lock.tryOptimisticRead()) != 0L); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * A stamp obtained from an unsuccessful lock operation does not validate + */ + public void testValidate2() { + try { + StampedLock lock = new StampedLock(); + long s; + assertTrue((s = lock.writeLock()) != 0L); + assertTrue(lock.validate(s)); + assertFalse(lock.validate(lock.tryWriteLock())); + assertFalse(lock.validate(lock.tryWriteLock(100L, MILLISECONDS))); + assertFalse(lock.validate(lock.tryReadLock())); + assertFalse(lock.validate(lock.tryReadLock(100L, MILLISECONDS))); + assertFalse(lock.validate(lock.tryOptimisticRead())); + lock.unlockWrite(s); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * writeLockInterruptibly is interruptible + */ + public void testWriteLockInterruptibly_Interruptible() { + final CountDownLatch running = new CountDownLatch(1); + final StampedLock lock = new StampedLock(); + long s = lock.writeLock(); + Thread t = newStartedThread(new CheckedInterruptedRunnable() { + public void realRun() throws InterruptedException { + running.countDown(); + lock.writeLockInterruptibly(); + }}); + try { + running.await(); Thread.sleep(SHORT_DELAY_MS); + t.interrupt(); + awaitTermination(t); + releaseWriteLock(lock, s); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * timed tryWriteLock is interruptible + */ + public void testWriteTryLock_Interruptible() { + final CountDownLatch running = new CountDownLatch(1); + final StampedLock lock = new StampedLock(); + long s = lock.writeLock(); + Thread t = newStartedThread(new CheckedInterruptedRunnable() { + public void realRun() throws InterruptedException { + running.countDown(); + lock.tryWriteLock(2 * LONG_DELAY_MS, MILLISECONDS); + }}); + try { + running.await(); Thread.sleep(SHORT_DELAY_MS); + t.interrupt(); + awaitTermination(t); + releaseWriteLock(lock, s); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * readLockInterruptibly is interruptible + */ + public void testReadLockInterruptibly_Interruptible() { + final CountDownLatch running = new CountDownLatch(1); + final StampedLock lock = new StampedLock(); + long s = lock.writeLock(); + Thread t = newStartedThread(new CheckedInterruptedRunnable() { + public void realRun() throws InterruptedException { + running.countDown(); + lock.readLockInterruptibly(); + }}); + try { + running.await(); Thread.sleep(SHORT_DELAY_MS); + t.interrupt(); + awaitTermination(t); + releaseWriteLock(lock, s); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * timed tryReadLock is interruptible + */ + public void testReadTryLock_Interruptible() { + final CountDownLatch running = new CountDownLatch(1); + final StampedLock lock = new StampedLock(); + long s = lock.writeLock(); + Thread t = newStartedThread(new CheckedInterruptedRunnable() { + public void realRun() throws InterruptedException { + running.countDown(); + lock.tryReadLock(2 * LONG_DELAY_MS, MILLISECONDS); + }}); + try { + running.await(); Thread.sleep(SHORT_DELAY_MS); + t.interrupt(); + awaitTermination(t); + releaseWriteLock(lock, s); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * tryWriteLock on an unlocked lock succeeds + */ + public void testWriteTryLock() { + final StampedLock lock = new StampedLock(); + long s = lock.tryWriteLock(); + assertTrue(s != 0L); + assertTrue(lock.isWriteLocked()); + long s2 = lock.tryWriteLock(); + assertEquals(s2, 0L); + releaseWriteLock(lock, s); + } + + /** + * tryWriteLock fails if locked + */ + public void testWriteTryLockWhenLocked() { + final StampedLock lock = new StampedLock(); + long s = lock.writeLock(); + Thread t = newStartedThread(new CheckedRunnable() { + public void realRun() { + long ws = lock.tryWriteLock(); + assertTrue(ws == 0L); + }}); + + awaitTermination(t); + releaseWriteLock(lock, s); + } + + /** + * tryReadLock fails if write-locked + */ + public void testReadTryLockWhenLocked() { + final StampedLock lock = new StampedLock(); + long s = lock.writeLock(); + Thread t = newStartedThread(new CheckedRunnable() { + public void realRun() { + long rs = lock.tryReadLock(); + assertEquals(rs, 0L); + }}); + + awaitTermination(t); + releaseWriteLock(lock, s); + } + + /** + * Multiple threads can hold a read lock when not write-locked + */ + public void testMultipleReadLocks() { + final StampedLock lock = new StampedLock(); + final long s = lock.readLock(); + Thread t = newStartedThread(new CheckedRunnable() { + public void realRun() throws InterruptedException { + long s2 = lock.tryReadLock(); + assertTrue(s2 != 0L); + lock.unlockRead(s2); + long s3 = lock.tryReadLock(LONG_DELAY_MS, MILLISECONDS); + assertTrue(s3 != 0L); + lock.unlockRead(s3); + long s4 = lock.readLock(); + lock.unlockRead(s4); + }}); + + awaitTermination(t); + lock.unlockRead(s); + } + + /** + * A writelock succeeds only after a reading thread unlocks + */ + public void testWriteAfterReadLock() { + final CountDownLatch running = new CountDownLatch(1); + final StampedLock lock = new StampedLock(); + long rs = lock.readLock(); + Thread t = newStartedThread(new CheckedRunnable() { + public void realRun() { + running.countDown(); + long s = lock.writeLock(); + lock.unlockWrite(s); + }}); + try { + running.await(); Thread.sleep(SHORT_DELAY_MS); + assertFalse(lock.isWriteLocked()); + lock.unlockRead(rs); + awaitTermination(t); + assertFalse(lock.isWriteLocked()); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * A writelock succeeds only after reading threads unlock + */ + public void testWriteAfterMultipleReadLocks() { + final StampedLock lock = new StampedLock(); + long s = lock.readLock(); + Thread t1 = newStartedThread(new CheckedRunnable() { + public void realRun() { + long rs = lock.readLock(); + lock.unlockRead(rs); + }}); + awaitTermination(t1); + + Thread t2 = newStartedThread(new CheckedRunnable() { + public void realRun() { + long ws = lock.writeLock(); + lock.unlockWrite(ws); + }}); + assertFalse(lock.isWriteLocked()); + lock.unlockRead(s); + awaitTermination(t2); + assertFalse(lock.isWriteLocked()); + } + + /** + * Readlocks succeed only after a writing thread unlocks + */ + public void testReadAfterWriteLock() { + final StampedLock lock = new StampedLock(); + final long s = lock.writeLock(); + Thread t1 = newStartedThread(new CheckedRunnable() { + public void realRun() { + long rs = lock.readLock(); + lock.unlockRead(rs); + }}); + Thread t2 = newStartedThread(new CheckedRunnable() { + public void realRun() { + long rs = lock.readLock(); + lock.unlockRead(rs); + }}); + + releaseWriteLock(lock, s); + awaitTermination(t1); + awaitTermination(t2); + } + + /** + * tryReadLock succeeds if readlocked but not writelocked + */ + public void testTryLockWhenReadLocked() { + final StampedLock lock = new StampedLock(); + long s = lock.readLock(); + Thread t = newStartedThread(new CheckedRunnable() { + public void realRun() { + long rs = lock.tryReadLock(); + threadAssertTrue(rs != 0L); + lock.unlockRead(rs); + }}); + + awaitTermination(t); + lock.unlockRead(s); + } + + /** + * tryWriteLock fails when readlocked + */ + public void testWriteTryLockWhenReadLocked() { + final StampedLock lock = new StampedLock(); + long s = lock.readLock(); + Thread t = newStartedThread(new CheckedRunnable() { + public void realRun() { + long ws = lock.tryWriteLock(); + threadAssertEquals(ws, 0L); + }}); + + awaitTermination(t); + lock.unlockRead(s); + } + + /** + * timed tryWriteLock times out if locked + */ + public void testWriteTryLock_Timeout() { + final StampedLock lock = new StampedLock(); + long s = lock.writeLock(); + Thread t = newStartedThread(new CheckedRunnable() { + public void realRun() throws InterruptedException { + long startTime = System.nanoTime(); + long timeoutMillis = 10; + long ws = lock.tryWriteLock(timeoutMillis, MILLISECONDS); + assertEquals(ws, 0L); + assertTrue(millisElapsedSince(startTime) >= timeoutMillis); + }}); + + awaitTermination(t); + releaseWriteLock(lock, s); + } + + /** + * timed tryReadLock times out if write-locked + */ + public void testReadTryLock_Timeout() { + final StampedLock lock = new StampedLock(); + long s = lock.writeLock(); + Thread t = newStartedThread(new CheckedRunnable() { + public void realRun() throws InterruptedException { + long startTime = System.nanoTime(); + long timeoutMillis = 10; + long rs = lock.tryReadLock(timeoutMillis, MILLISECONDS); + assertEquals(rs, 0L); + assertTrue(millisElapsedSince(startTime) >= timeoutMillis); + }}); + + awaitTermination(t); + assertTrue(lock.isWriteLocked()); + lock.unlockWrite(s); + } + + /** + * writeLockInterruptibly succeeds if unlocked, else is interruptible + */ + public void testWriteLockInterruptibly() { + final CountDownLatch running = new CountDownLatch(1); + final StampedLock lock = new StampedLock(); + long s = 0L; + try { + s = lock.writeLockInterruptibly(); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + Thread t = newStartedThread(new CheckedInterruptedRunnable() { + public void realRun() throws InterruptedException { + running.countDown(); + lock.writeLockInterruptibly(); + }}); + + try { + running.await(); Thread.sleep(SHORT_DELAY_MS); + t.interrupt(); + assertTrue(lock.isWriteLocked()); + awaitTermination(t); + releaseWriteLock(lock, s); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + + } + + /** + * readLockInterruptibly succeeds if lock free else is interruptible + */ + public void testReadLockInterruptibly() { + final CountDownLatch running = new CountDownLatch(1); + final StampedLock lock = new StampedLock(); + long s = 0L; + try { + s = lock.readLockInterruptibly(); + lock.unlockRead(s); + s = lock.writeLockInterruptibly(); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + Thread t = newStartedThread(new CheckedInterruptedRunnable() { + public void realRun() throws InterruptedException { + running.countDown(); + lock.readLockInterruptibly(); + }}); + try { + running.await(); Thread.sleep(SHORT_DELAY_MS); + t.interrupt(); + awaitTermination(t); + releaseWriteLock(lock, s); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * A serialized lock deserializes as unlocked + */ + public void testSerialization() { + StampedLock lock = new StampedLock(); + lock.writeLock(); + StampedLock clone = serialClone(lock); + assertTrue(lock.isWriteLocked()); + assertFalse(clone.isWriteLocked()); + long s = clone.writeLock(); + assertTrue(clone.isWriteLocked()); + clone.unlockWrite(s); + assertFalse(clone.isWriteLocked()); + } + /** + * toString indicates current lock state + */ + public void testToString() { + StampedLock lock = new StampedLock(); + assertTrue(lock.toString().contains("Unlocked")); + long s = lock.writeLock(); + assertTrue(lock.toString().contains("Write-locked")); + lock.unlockWrite(s); + s = lock.readLock(); + assertTrue(lock.toString().contains("Read-locks")); + } + + /** + * tryOptimisticRead succeeds and validates if unlocked, fails if locked + */ + public void testValidateOptimistic() { + try { + StampedLock lock = new StampedLock(); + long s, p; + assertTrue((p = lock.tryOptimisticRead()) != 0L); + assertTrue(lock.validate(p)); + assertTrue((s = lock.writeLock()) != 0L); + assertFalse((p = lock.tryOptimisticRead()) != 0L); + assertTrue(lock.validate(s)); + lock.unlockWrite(s); + assertTrue((p = lock.tryOptimisticRead()) != 0L); + assertTrue(lock.validate(p)); + assertTrue((s = lock.readLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryOptimisticRead()) != 0L); + assertTrue(lock.validate(p)); + lock.unlockRead(s); + assertTrue((s = lock.tryWriteLock()) != 0L); + assertTrue(lock.validate(s)); + assertFalse((p = lock.tryOptimisticRead()) != 0L); + lock.unlockWrite(s); + assertTrue((s = lock.tryReadLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryOptimisticRead()) != 0L); + lock.unlockRead(s); + assertTrue(lock.validate(p)); + assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); + assertFalse((p = lock.tryOptimisticRead()) != 0L); + assertTrue(lock.validate(s)); + lock.unlockWrite(s); + assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryOptimisticRead()) != 0L); + lock.unlockRead(s); + assertTrue((p = lock.tryOptimisticRead()) != 0L); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * tryOptimisticRead stamp does not validate if a write lock intervenes + */ + public void testValidateOptimisticWriteLocked() { + StampedLock lock = new StampedLock(); + long s, p; + assertTrue((p = lock.tryOptimisticRead()) != 0L); + assertTrue((s = lock.writeLock()) != 0L); + assertFalse(lock.validate(p)); + assertFalse((p = lock.tryOptimisticRead()) != 0L); + assertTrue(lock.validate(s)); + lock.unlockWrite(s); + } + + /** + * tryOptimisticRead stamp does not validate if a write lock + * intervenes in another thread + */ + public void testValidateOptimisticWriteLocked2() { + final CountDownLatch running = new CountDownLatch(1); + final StampedLock lock = new StampedLock(); + long s, p; + assertTrue((p = lock.tryOptimisticRead()) != 0L); + Thread t = newStartedThread(new CheckedInterruptedRunnable() { + public void realRun() throws InterruptedException { + lock.writeLockInterruptibly(); + running.countDown(); + lock.writeLockInterruptibly(); + }}); + try { + running.await(); + assertFalse(lock.validate(p)); + assertFalse((p = lock.tryOptimisticRead()) != 0L); + t.interrupt(); + awaitTermination(t); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * tryConvertToOptimisticRead succeeds and validates if successfully locked, + */ + public void testTryConvertToOptimisticRead() { + try { + StampedLock lock = new StampedLock(); + long s, p; + s = 0L; + assertFalse((p = lock.tryConvertToOptimisticRead(s)) != 0L); + assertTrue((s = lock.tryOptimisticRead()) != 0L); + assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); + assertTrue((s = lock.writeLock()) != 0L); + assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); + assertTrue(lock.validate(p)); + assertTrue((s = lock.readLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); + assertTrue(lock.validate(p)); + assertTrue((s = lock.tryWriteLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); + assertTrue(lock.validate(p)); + assertTrue((s = lock.tryReadLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); + assertTrue(lock.validate(p)); + assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); + assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); + assertTrue(lock.validate(p)); + assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); + assertTrue(lock.validate(p)); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * tryConvertToReadLock succeeds and validates if successfully locked + * or lock free; + */ + public void testTryConvertToReadLock() { + try { + StampedLock lock = new StampedLock(); + long s, p; + s = 0L; + assertFalse((p = lock.tryConvertToReadLock(s)) != 0L); + assertTrue((s = lock.tryOptimisticRead()) != 0L); + assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); + lock.unlockRead(p); + assertTrue((s = lock.writeLock()) != 0L); + assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockRead(p); + assertTrue((s = lock.readLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockRead(p); + assertTrue((s = lock.tryWriteLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockRead(p); + assertTrue((s = lock.tryReadLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockRead(p); + assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); + assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockRead(p); + assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockRead(p); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * tryConvertToWriteLock succeeds and validates if successfully locked + * or lock free; + */ + public void testTryConvertToWriteLock() { + try { + StampedLock lock = new StampedLock(); + long s, p; + s = 0L; + assertFalse((p = lock.tryConvertToWriteLock(s)) != 0L); + assertTrue((s = lock.tryOptimisticRead()) != 0L); + assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); + lock.unlockWrite(p); + assertTrue((s = lock.writeLock()) != 0L); + assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockWrite(p); + assertTrue((s = lock.readLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockWrite(p); + assertTrue((s = lock.tryWriteLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockWrite(p); + assertTrue((s = lock.tryReadLock()) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockWrite(p); + assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); + assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockWrite(p); + assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); + assertTrue(lock.validate(s)); + assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); + assertTrue(lock.validate(p)); + lock.unlockWrite(p); + } catch (InterruptedException ie) { + threadUnexpectedException(ie); + } + } + + /** + * asWriteLock can be locked and unlocked + */ + public void testAsWriteLock() { + StampedLock sl = new StampedLock(); + Lock lock = sl.asWriteLock(); + lock.lock(); + assertFalse(lock.tryLock()); + lock.unlock(); + assertTrue(lock.tryLock()); + } + + /** + * asReadLock can be locked and unlocked + */ + public void testAsReadLock() { + StampedLock sl = new StampedLock(); + Lock lock = sl.asReadLock(); + lock.lock(); + lock.unlock(); + assertTrue(lock.tryLock()); + } + + /** + * asReadWriteLock.writeLock can be locked and unlocked + */ + public void testAsReadWriteLockWriteLock() { + StampedLock sl = new StampedLock(); + Lock lock = sl.asReadWriteLock().writeLock(); + lock.lock(); + assertFalse(lock.tryLock()); + lock.unlock(); + assertTrue(lock.tryLock()); + } + + /** + * asReadWriteLock.readLock can be locked and unlocked + */ + public void testAsReadWriteLockReadLock() { + StampedLock sl = new StampedLock(); + Lock lock = sl.asReadWriteLock().readLock(); + lock.lock(); + lock.unlock(); + assertTrue(lock.tryLock()); + } }