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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
4 |
* 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. |
7 |
*/ |
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|
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import junit.framework.*; |
10 |
import java.util.concurrent.locks.Condition; |
11 |
import java.util.concurrent.locks.ReentrantLock; |
12 |
import java.util.concurrent.CountDownLatch; |
13 |
import java.util.concurrent.CyclicBarrier; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import java.util.*; |
16 |
|
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public class ReentrantLockTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(ReentrantLockTest.class); |
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} |
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|
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/** |
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* A runnable calling lockInterruptibly |
27 |
*/ |
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class InterruptibleLockRunnable extends CheckedRunnable { |
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final ReentrantLock lock; |
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InterruptibleLockRunnable(ReentrantLock l) { lock = l; } |
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public void realRun() throws InterruptedException { |
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lock.lockInterruptibly(); |
33 |
} |
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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 ReentrantLock lock; |
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InterruptedLockRunnable(ReentrantLock l) { lock = l; } |
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public void realRun() throws InterruptedException { |
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lock.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 PublicReentrantLock extends ReentrantLock { |
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PublicReentrantLock() { super(); } |
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PublicReentrantLock(boolean fair) { super(fair); } |
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public Thread getOwner() { |
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return super.getOwner(); |
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} |
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public Collection<Thread> getQueuedThreads() { |
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return super.getQueuedThreads(); |
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} |
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public Collection<Thread> getWaitingThreads(Condition c) { |
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return super.getWaitingThreads(c); |
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} |
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} |
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|
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/** |
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* Releases write lock, checking that it had a hold count of 1. |
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*/ |
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void releaseLock(PublicReentrantLock lock) { |
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assertLockedByMoi(lock); |
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lock.unlock(); |
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assertFalse(lock.isHeldByCurrentThread()); |
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assertNotLocked(lock); |
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} |
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|
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/** |
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* Spin-waits until lock.hasQueuedThread(t) becomes true. |
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*/ |
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void waitForQueuedThread(PublicReentrantLock lock, Thread t) { |
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long startTime = System.nanoTime(); |
80 |
while (!lock.hasQueuedThread(t)) { |
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if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
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throw new AssertionFailedError("timed out"); |
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Thread.yield(); |
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} |
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assertTrue(t.isAlive()); |
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assertNotSame(t, lock.getOwner()); |
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} |
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|
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/** |
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* Checks that lock is not locked. |
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*/ |
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void assertNotLocked(PublicReentrantLock lock) { |
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assertFalse(lock.isLocked()); |
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assertFalse(lock.isHeldByCurrentThread()); |
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assertNull(lock.getOwner()); |
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assertEquals(0, lock.getHoldCount()); |
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} |
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|
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/** |
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* Checks that lock is locked by the given thread. |
101 |
*/ |
102 |
void assertLockedBy(PublicReentrantLock lock, Thread t) { |
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assertTrue(lock.isLocked()); |
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assertSame(t, lock.getOwner()); |
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assertEquals(t == Thread.currentThread(), |
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lock.isHeldByCurrentThread()); |
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assertEquals(t == Thread.currentThread(), |
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lock.getHoldCount() > 0); |
109 |
} |
110 |
|
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/** |
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* Checks that lock is locked by the current thread. |
113 |
*/ |
114 |
void assertLockedByMoi(PublicReentrantLock lock) { |
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assertLockedBy(lock, Thread.currentThread()); |
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} |
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|
118 |
/** |
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* Checks that condition c has no waiters. |
120 |
*/ |
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void assertHasNoWaiters(PublicReentrantLock lock, Condition c) { |
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assertHasWaiters(lock, c, new Thread[] {}); |
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} |
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|
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/** |
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* Checks that condition c has exactly the given waiter threads. |
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*/ |
128 |
void assertHasWaiters(PublicReentrantLock lock, Condition c, |
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Thread... threads) { |
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lock.lock(); |
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assertEquals(threads.length > 0, lock.hasWaiters(c)); |
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assertEquals(threads.length, lock.getWaitQueueLength(c)); |
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assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty()); |
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assertEquals(threads.length, lock.getWaitingThreads(c).size()); |
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assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)), |
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new HashSet<Thread>(Arrays.asList(threads))); |
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lock.unlock(); |
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} |
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|
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enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }; |
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|
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/** |
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* Awaits condition using the specified AwaitMethod. |
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*/ |
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void await(Condition c, AwaitMethod awaitMethod) |
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throws InterruptedException { |
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long timeoutMillis = 2 * LONG_DELAY_MS; |
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switch (awaitMethod) { |
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case await: |
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c.await(); |
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break; |
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case awaitTimed: |
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assertTrue(c.await(timeoutMillis, MILLISECONDS)); |
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break; |
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case awaitNanos: |
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long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
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long nanosRemaining = c.awaitNanos(nanosTimeout); |
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assertTrue(nanosRemaining > 0); |
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break; |
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case awaitUntil: |
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assertTrue(c.awaitUntil(delayedDate(timeoutMillis))); |
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break; |
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} |
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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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PublicReentrantLock lock; |
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|
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lock = new PublicReentrantLock(); |
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assertFalse(lock.isFair()); |
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assertNotLocked(lock); |
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|
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lock = new PublicReentrantLock(true); |
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assertTrue(lock.isFair()); |
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assertNotLocked(lock); |
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|
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lock = new PublicReentrantLock(false); |
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assertFalse(lock.isFair()); |
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assertNotLocked(lock); |
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} |
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|
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/** |
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* locking an unlocked lock succeeds |
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*/ |
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public void testLock() { testLock(false); } |
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public void testLock_fair() { testLock(true); } |
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public void testLock(boolean fair) { |
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PublicReentrantLock lock = new PublicReentrantLock(fair); |
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lock.lock(); |
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assertLockedByMoi(lock); |
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releaseLock(lock); |
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} |
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|
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/** |
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* Unlocking an unlocked lock throws IllegalMonitorStateException |
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*/ |
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public void testUnlock_IMSE() { testUnlock_IMSE(false); } |
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public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); } |
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public void testUnlock_IMSE(boolean fair) { |
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ReentrantLock lock = new ReentrantLock(fair); |
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try { |
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lock.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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* tryLock on an unlocked lock succeeds |
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*/ |
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public void testTryLock() { testTryLock(false); } |
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public void testTryLock_fair() { testTryLock(true); } |
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public void testTryLock(boolean fair) { |
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PublicReentrantLock lock = new PublicReentrantLock(fair); |
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assertTrue(lock.tryLock()); |
218 |
assertLockedByMoi(lock); |
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assertTrue(lock.tryLock()); |
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assertLockedByMoi(lock); |
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lock.unlock(); |
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releaseLock(lock); |
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} |
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|
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/** |
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* hasQueuedThreads reports whether there are waiting threads |
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*/ |
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public void testHasQueuedThreads() { testHasQueuedThreads(false); } |
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public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); } |
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public void testHasQueuedThreads(boolean fair) { |
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final PublicReentrantLock lock = new PublicReentrantLock(fair); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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assertFalse(lock.hasQueuedThreads()); |
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lock.lock(); |
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assertFalse(lock.hasQueuedThreads()); |
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t1.start(); |
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waitForQueuedThread(lock, t1); |
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assertTrue(lock.hasQueuedThreads()); |
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t2.start(); |
241 |
waitForQueuedThread(lock, t2); |
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assertTrue(lock.hasQueuedThreads()); |
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t1.interrupt(); |
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awaitTermination(t1); |
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assertTrue(lock.hasQueuedThreads()); |
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lock.unlock(); |
247 |
awaitTermination(t2); |
248 |
assertFalse(lock.hasQueuedThreads()); |
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} |
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|
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/** |
252 |
* getQueueLength reports number of waiting threads |
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*/ |
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public void testGetQueueLength() { testGetQueueLength(false); } |
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public void testGetQueueLength_fair() { testGetQueueLength(true); } |
256 |
public void testGetQueueLength(boolean fair) { |
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final PublicReentrantLock lock = new PublicReentrantLock(fair); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
260 |
assertEquals(0, lock.getQueueLength()); |
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lock.lock(); |
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t1.start(); |
263 |
waitForQueuedThread(lock, t1); |
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assertEquals(1, lock.getQueueLength()); |
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t2.start(); |
266 |
waitForQueuedThread(lock, t2); |
267 |
assertEquals(2, lock.getQueueLength()); |
268 |
t1.interrupt(); |
269 |
awaitTermination(t1); |
270 |
assertEquals(1, lock.getQueueLength()); |
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lock.unlock(); |
272 |
awaitTermination(t2); |
273 |
assertEquals(0, lock.getQueueLength()); |
274 |
} |
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|
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/** |
277 |
* hasQueuedThread(null) throws NPE |
278 |
*/ |
279 |
public void testHasQueuedThreadNPE() { testHasQueuedThreadNPE(false); } |
280 |
public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); } |
281 |
public void testHasQueuedThreadNPE(boolean fair) { |
282 |
final ReentrantLock lock = new ReentrantLock(fair); |
283 |
try { |
284 |
lock.hasQueuedThread(null); |
285 |
shouldThrow(); |
286 |
} catch (NullPointerException success) {} |
287 |
} |
288 |
|
289 |
/** |
290 |
* hasQueuedThread reports whether a thread is queued |
291 |
*/ |
292 |
public void testHasQueuedThread() { testHasQueuedThread(false); } |
293 |
public void testHasQueuedThread_fair() { testHasQueuedThread(true); } |
294 |
public void testHasQueuedThread(boolean fair) { |
295 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
296 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
297 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
298 |
assertFalse(lock.hasQueuedThread(t1)); |
299 |
assertFalse(lock.hasQueuedThread(t2)); |
300 |
lock.lock(); |
301 |
t1.start(); |
302 |
waitForQueuedThread(lock, t1); |
303 |
assertTrue(lock.hasQueuedThread(t1)); |
304 |
assertFalse(lock.hasQueuedThread(t2)); |
305 |
t2.start(); |
306 |
waitForQueuedThread(lock, t2); |
307 |
assertTrue(lock.hasQueuedThread(t1)); |
308 |
assertTrue(lock.hasQueuedThread(t2)); |
309 |
t1.interrupt(); |
310 |
awaitTermination(t1); |
311 |
assertFalse(lock.hasQueuedThread(t1)); |
312 |
assertTrue(lock.hasQueuedThread(t2)); |
313 |
lock.unlock(); |
314 |
awaitTermination(t2); |
315 |
assertFalse(lock.hasQueuedThread(t1)); |
316 |
assertFalse(lock.hasQueuedThread(t2)); |
317 |
} |
318 |
|
319 |
/** |
320 |
* getQueuedThreads includes waiting threads |
321 |
*/ |
322 |
public void testGetQueuedThreads() { testGetQueuedThreads(false); } |
323 |
public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); } |
324 |
public void testGetQueuedThreads(boolean fair) { |
325 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
326 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
327 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
328 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
329 |
lock.lock(); |
330 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
331 |
t1.start(); |
332 |
waitForQueuedThread(lock, t1); |
333 |
assertEquals(1, lock.getQueuedThreads().size()); |
334 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
335 |
t2.start(); |
336 |
waitForQueuedThread(lock, t2); |
337 |
assertEquals(2, lock.getQueuedThreads().size()); |
338 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
339 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
340 |
t1.interrupt(); |
341 |
awaitTermination(t1); |
342 |
assertFalse(lock.getQueuedThreads().contains(t1)); |
343 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
344 |
assertEquals(1, lock.getQueuedThreads().size()); |
345 |
lock.unlock(); |
346 |
awaitTermination(t2); |
347 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
348 |
} |
349 |
|
350 |
/** |
351 |
* timed tryLock is interruptible |
352 |
*/ |
353 |
public void testTryLock_Interruptible() { testTryLock_Interruptible(false); } |
354 |
public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); } |
355 |
public void testTryLock_Interruptible(boolean fair) { |
356 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
357 |
lock.lock(); |
358 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
359 |
public void realRun() throws InterruptedException { |
360 |
lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS); |
361 |
}}); |
362 |
|
363 |
waitForQueuedThread(lock, t); |
364 |
t.interrupt(); |
365 |
awaitTermination(t); |
366 |
releaseLock(lock); |
367 |
} |
368 |
|
369 |
/** |
370 |
* tryLock on a locked lock fails |
371 |
*/ |
372 |
public void testTryLockWhenLocked() { testTryLockWhenLocked(false); } |
373 |
public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); } |
374 |
public void testTryLockWhenLocked(boolean fair) { |
375 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
376 |
lock.lock(); |
377 |
Thread t = newStartedThread(new CheckedRunnable() { |
378 |
public void realRun() { |
379 |
assertFalse(lock.tryLock()); |
380 |
}}); |
381 |
|
382 |
awaitTermination(t); |
383 |
releaseLock(lock); |
384 |
} |
385 |
|
386 |
/** |
387 |
* Timed tryLock on a locked lock times out |
388 |
*/ |
389 |
public void testTryLock_Timeout() { testTryLock_Timeout(false); } |
390 |
public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); } |
391 |
public void testTryLock_Timeout(boolean fair) { |
392 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
393 |
lock.lock(); |
394 |
Thread t = newStartedThread(new CheckedRunnable() { |
395 |
public void realRun() throws InterruptedException { |
396 |
long startTime = System.nanoTime(); |
397 |
long timeoutMillis = 10; |
398 |
assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS)); |
399 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
400 |
}}); |
401 |
|
402 |
awaitTermination(t); |
403 |
releaseLock(lock); |
404 |
} |
405 |
|
406 |
/** |
407 |
* getHoldCount returns number of recursive holds |
408 |
*/ |
409 |
public void testGetHoldCount() { testGetHoldCount(false); } |
410 |
public void testGetHoldCount_fair() { testGetHoldCount(true); } |
411 |
public void testGetHoldCount(boolean fair) { |
412 |
ReentrantLock lock = new ReentrantLock(fair); |
413 |
for (int i = 1; i <= SIZE; i++) { |
414 |
lock.lock(); |
415 |
assertEquals(i, lock.getHoldCount()); |
416 |
} |
417 |
for (int i = SIZE; i > 0; i--) { |
418 |
lock.unlock(); |
419 |
assertEquals(i-1, lock.getHoldCount()); |
420 |
} |
421 |
} |
422 |
|
423 |
/** |
424 |
* isLocked is true when locked and false when not |
425 |
*/ |
426 |
public void testIsLocked() { testIsLocked(false); } |
427 |
public void testIsLocked_fair() { testIsLocked(true); } |
428 |
public void testIsLocked(boolean fair) { |
429 |
try { |
430 |
final ReentrantLock lock = new ReentrantLock(fair); |
431 |
assertFalse(lock.isLocked()); |
432 |
lock.lock(); |
433 |
assertTrue(lock.isLocked()); |
434 |
lock.lock(); |
435 |
assertTrue(lock.isLocked()); |
436 |
lock.unlock(); |
437 |
assertTrue(lock.isLocked()); |
438 |
lock.unlock(); |
439 |
assertFalse(lock.isLocked()); |
440 |
final CyclicBarrier barrier = new CyclicBarrier(2); |
441 |
Thread t = newStartedThread(new CheckedRunnable() { |
442 |
public void realRun() throws Exception { |
443 |
lock.lock(); |
444 |
assertTrue(lock.isLocked()); |
445 |
barrier.await(); |
446 |
barrier.await(); |
447 |
lock.unlock(); |
448 |
}}); |
449 |
|
450 |
barrier.await(); |
451 |
assertTrue(lock.isLocked()); |
452 |
barrier.await(); |
453 |
awaitTermination(t); |
454 |
assertFalse(lock.isLocked()); |
455 |
} catch (Exception e) { |
456 |
threadUnexpectedException(e); |
457 |
} |
458 |
} |
459 |
|
460 |
/** |
461 |
* lockInterruptibly succeeds when unlocked, else is interruptible |
462 |
*/ |
463 |
public void testLockInterruptibly() { testLockInterruptibly(false); } |
464 |
public void testLockInterruptibly_fair() { testLockInterruptibly(true); } |
465 |
public void testLockInterruptibly(boolean fair) { |
466 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
467 |
try { |
468 |
lock.lockInterruptibly(); |
469 |
} catch (InterruptedException ie) { |
470 |
threadUnexpectedException(ie); |
471 |
} |
472 |
assertLockedByMoi(lock); |
473 |
Thread t = newStartedThread(new InterruptedLockRunnable(lock)); |
474 |
waitForQueuedThread(lock, t); |
475 |
t.interrupt(); |
476 |
assertTrue(lock.isLocked()); |
477 |
assertTrue(lock.isHeldByCurrentThread()); |
478 |
awaitTermination(t); |
479 |
releaseLock(lock); |
480 |
} |
481 |
|
482 |
/** |
483 |
* Calling await without holding lock throws IllegalMonitorStateException |
484 |
*/ |
485 |
public void testAwait_IMSE() { testAwait_IMSE(false); } |
486 |
public void testAwait_IMSE_fair() { testAwait_IMSE(true); } |
487 |
public void testAwait_IMSE(boolean fair) { |
488 |
final ReentrantLock lock = new ReentrantLock(fair); |
489 |
final Condition c = lock.newCondition(); |
490 |
for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
491 |
long startTime = System.nanoTime(); |
492 |
try { |
493 |
await(c, awaitMethod); |
494 |
shouldThrow(); |
495 |
} catch (IllegalMonitorStateException success) { |
496 |
} catch (InterruptedException e) { threadUnexpectedException(e); } |
497 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
498 |
} |
499 |
} |
500 |
|
501 |
/** |
502 |
* Calling signal without holding lock throws IllegalMonitorStateException |
503 |
*/ |
504 |
public void testSignal_IMSE() { testSignal_IMSE(false); } |
505 |
public void testSignal_IMSE_fair() { testSignal_IMSE(true); } |
506 |
public void testSignal_IMSE(boolean fair) { |
507 |
final ReentrantLock lock = new ReentrantLock(fair); |
508 |
final Condition c = lock.newCondition(); |
509 |
try { |
510 |
c.signal(); |
511 |
shouldThrow(); |
512 |
} catch (IllegalMonitorStateException success) {} |
513 |
} |
514 |
|
515 |
/** |
516 |
* awaitNanos without a signal times out |
517 |
*/ |
518 |
public void testAwaitNanos_Timeout() { testAwaitNanos_Timeout(false); } |
519 |
public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); } |
520 |
public void testAwaitNanos_Timeout(boolean fair) { |
521 |
try { |
522 |
final ReentrantLock lock = new ReentrantLock(fair); |
523 |
final Condition c = lock.newCondition(); |
524 |
lock.lock(); |
525 |
long startTime = System.nanoTime(); |
526 |
long timeoutMillis = 10; |
527 |
long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
528 |
long nanosRemaining = c.awaitNanos(timeoutNanos); |
529 |
assertTrue(nanosRemaining <= 0); |
530 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
531 |
lock.unlock(); |
532 |
} catch (InterruptedException e) { |
533 |
threadUnexpectedException(e); |
534 |
} |
535 |
} |
536 |
|
537 |
/** |
538 |
* timed await without a signal times out |
539 |
*/ |
540 |
public void testAwait_Timeout() { testAwait_Timeout(false); } |
541 |
public void testAwait_Timeout_fair() { testAwait_Timeout(true); } |
542 |
public void testAwait_Timeout(boolean fair) { |
543 |
try { |
544 |
final ReentrantLock lock = new ReentrantLock(fair); |
545 |
final Condition c = lock.newCondition(); |
546 |
lock.lock(); |
547 |
long startTime = System.nanoTime(); |
548 |
long timeoutMillis = 10; |
549 |
assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
550 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
551 |
lock.unlock(); |
552 |
} catch (InterruptedException e) { |
553 |
threadUnexpectedException(e); |
554 |
} |
555 |
} |
556 |
|
557 |
/** |
558 |
* awaitUntil without a signal times out |
559 |
*/ |
560 |
public void testAwaitUntil_Timeout() { testAwaitUntil_Timeout(false); } |
561 |
public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); } |
562 |
public void testAwaitUntil_Timeout(boolean fair) { |
563 |
try { |
564 |
final ReentrantLock lock = new ReentrantLock(fair); |
565 |
final Condition c = lock.newCondition(); |
566 |
lock.lock(); |
567 |
long startTime = System.nanoTime(); |
568 |
long timeoutMillis = 10; |
569 |
java.util.Date d = new java.util.Date(); |
570 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis))); |
571 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
572 |
lock.unlock(); |
573 |
} catch (InterruptedException e) { |
574 |
threadUnexpectedException(e); |
575 |
} |
576 |
} |
577 |
|
578 |
/** |
579 |
* await returns when signalled |
580 |
*/ |
581 |
public void testAwait() { testAwait(false); } |
582 |
public void testAwait_fair() { testAwait(true); } |
583 |
public void testAwait(boolean fair) { |
584 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
585 |
final Condition c = lock.newCondition(); |
586 |
final CountDownLatch locked = new CountDownLatch(1); |
587 |
Thread t = newStartedThread(new CheckedRunnable() { |
588 |
public void realRun() throws InterruptedException { |
589 |
lock.lock(); |
590 |
locked.countDown(); |
591 |
c.await(); |
592 |
lock.unlock(); |
593 |
}}); |
594 |
|
595 |
await(locked); |
596 |
lock.lock(); |
597 |
assertHasWaiters(lock, c, t); |
598 |
c.signal(); |
599 |
assertHasNoWaiters(lock, c); |
600 |
assertTrue(t.isAlive()); |
601 |
lock.unlock(); |
602 |
awaitTermination(t); |
603 |
} |
604 |
|
605 |
/** |
606 |
* hasWaiters throws NPE if null |
607 |
*/ |
608 |
public void testHasWaitersNPE() { testHasWaitersNPE(false); } |
609 |
public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); } |
610 |
public void testHasWaitersNPE(boolean fair) { |
611 |
final ReentrantLock lock = new ReentrantLock(fair); |
612 |
try { |
613 |
lock.hasWaiters(null); |
614 |
shouldThrow(); |
615 |
} catch (NullPointerException success) {} |
616 |
} |
617 |
|
618 |
/** |
619 |
* getWaitQueueLength throws NPE if null |
620 |
*/ |
621 |
public void testGetWaitQueueLengthNPE() { testGetWaitQueueLengthNPE(false); } |
622 |
public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); } |
623 |
public void testGetWaitQueueLengthNPE(boolean fair) { |
624 |
final ReentrantLock lock = new ReentrantLock(fair); |
625 |
try { |
626 |
lock.getWaitQueueLength(null); |
627 |
shouldThrow(); |
628 |
} catch (NullPointerException success) {} |
629 |
} |
630 |
|
631 |
/** |
632 |
* getWaitingThreads throws NPE if null |
633 |
*/ |
634 |
public void testGetWaitingThreadsNPE() { testGetWaitingThreadsNPE(false); } |
635 |
public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); } |
636 |
public void testGetWaitingThreadsNPE(boolean fair) { |
637 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
638 |
try { |
639 |
lock.getWaitingThreads(null); |
640 |
shouldThrow(); |
641 |
} catch (NullPointerException success) {} |
642 |
} |
643 |
|
644 |
/** |
645 |
* hasWaiters throws IllegalArgumentException if not owned |
646 |
*/ |
647 |
public void testHasWaitersIAE() { testHasWaitersIAE(false); } |
648 |
public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); } |
649 |
public void testHasWaitersIAE(boolean fair) { |
650 |
final ReentrantLock lock = new ReentrantLock(fair); |
651 |
final Condition c = lock.newCondition(); |
652 |
final ReentrantLock lock2 = new ReentrantLock(fair); |
653 |
try { |
654 |
lock2.hasWaiters(c); |
655 |
shouldThrow(); |
656 |
} catch (IllegalArgumentException success) {} |
657 |
} |
658 |
|
659 |
/** |
660 |
* hasWaiters throws IllegalMonitorStateException if not locked |
661 |
*/ |
662 |
public void testHasWaitersIMSE() { testHasWaitersIMSE(false); } |
663 |
public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); } |
664 |
public void testHasWaitersIMSE(boolean fair) { |
665 |
final ReentrantLock lock = new ReentrantLock(fair); |
666 |
final Condition c = lock.newCondition(); |
667 |
try { |
668 |
lock.hasWaiters(c); |
669 |
shouldThrow(); |
670 |
} catch (IllegalMonitorStateException success) {} |
671 |
} |
672 |
|
673 |
/** |
674 |
* getWaitQueueLength throws IllegalArgumentException if not owned |
675 |
*/ |
676 |
public void testGetWaitQueueLengthIAE() { testGetWaitQueueLengthIAE(false); } |
677 |
public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); } |
678 |
public void testGetWaitQueueLengthIAE(boolean fair) { |
679 |
final ReentrantLock lock = new ReentrantLock(fair); |
680 |
final Condition c = lock.newCondition(); |
681 |
final ReentrantLock lock2 = new ReentrantLock(fair); |
682 |
try { |
683 |
lock2.getWaitQueueLength(c); |
684 |
shouldThrow(); |
685 |
} catch (IllegalArgumentException success) {} |
686 |
} |
687 |
|
688 |
/** |
689 |
* getWaitQueueLength throws IllegalMonitorStateException if not locked |
690 |
*/ |
691 |
public void testGetWaitQueueLengthIMSE() { testGetWaitQueueLengthIMSE(false); } |
692 |
public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); } |
693 |
public void testGetWaitQueueLengthIMSE(boolean fair) { |
694 |
final ReentrantLock lock = new ReentrantLock(fair); |
695 |
final Condition c = lock.newCondition(); |
696 |
try { |
697 |
lock.getWaitQueueLength(c); |
698 |
shouldThrow(); |
699 |
} catch (IllegalMonitorStateException success) {} |
700 |
} |
701 |
|
702 |
/** |
703 |
* getWaitingThreads throws IllegalArgumentException if not owned |
704 |
*/ |
705 |
public void testGetWaitingThreadsIAE() { testGetWaitingThreadsIAE(false); } |
706 |
public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); } |
707 |
public void testGetWaitingThreadsIAE(boolean fair) { |
708 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
709 |
final Condition c = lock.newCondition(); |
710 |
final PublicReentrantLock lock2 = new PublicReentrantLock(fair); |
711 |
try { |
712 |
lock2.getWaitingThreads(c); |
713 |
shouldThrow(); |
714 |
} catch (IllegalArgumentException success) {} |
715 |
} |
716 |
|
717 |
/** |
718 |
* getWaitingThreads throws IllegalMonitorStateException if not locked |
719 |
*/ |
720 |
public void testGetWaitingThreadsIMSE() { testGetWaitingThreadsIMSE(false); } |
721 |
public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); } |
722 |
public void testGetWaitingThreadsIMSE(boolean fair) { |
723 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
724 |
final Condition c = lock.newCondition(); |
725 |
try { |
726 |
lock.getWaitingThreads(c); |
727 |
shouldThrow(); |
728 |
} catch (IllegalMonitorStateException success) {} |
729 |
} |
730 |
|
731 |
/** |
732 |
* hasWaiters returns true when a thread is waiting, else false |
733 |
*/ |
734 |
public void testHasWaiters() { testHasWaiters(false); } |
735 |
public void testHasWaiters_fair() { testHasWaiters(true); } |
736 |
public void testHasWaiters(boolean fair) { |
737 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
738 |
final Condition c = lock.newCondition(); |
739 |
final CountDownLatch pleaseSignal = new CountDownLatch(1); |
740 |
Thread t = newStartedThread(new CheckedRunnable() { |
741 |
public void realRun() throws InterruptedException { |
742 |
lock.lock(); |
743 |
assertHasNoWaiters(lock, c); |
744 |
assertFalse(lock.hasWaiters(c)); |
745 |
pleaseSignal.countDown(); |
746 |
c.await(); |
747 |
assertHasNoWaiters(lock, c); |
748 |
assertFalse(lock.hasWaiters(c)); |
749 |
lock.unlock(); |
750 |
}}); |
751 |
|
752 |
await(pleaseSignal); |
753 |
lock.lock(); |
754 |
assertHasWaiters(lock, c, t); |
755 |
assertTrue(lock.hasWaiters(c)); |
756 |
c.signal(); |
757 |
assertHasNoWaiters(lock, c); |
758 |
assertFalse(lock.hasWaiters(c)); |
759 |
lock.unlock(); |
760 |
awaitTermination(t); |
761 |
assertHasNoWaiters(lock, c); |
762 |
} |
763 |
|
764 |
/** |
765 |
* getWaitQueueLength returns number of waiting threads |
766 |
*/ |
767 |
public void testGetWaitQueueLength() { testGetWaitQueueLength(false); } |
768 |
public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); } |
769 |
public void testGetWaitQueueLength(boolean fair) { |
770 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
771 |
final Condition c = lock.newCondition(); |
772 |
final CountDownLatch locked1 = new CountDownLatch(1); |
773 |
final CountDownLatch locked2 = new CountDownLatch(1); |
774 |
Thread t1 = new Thread(new CheckedRunnable() { |
775 |
public void realRun() throws InterruptedException { |
776 |
lock.lock(); |
777 |
assertFalse(lock.hasWaiters(c)); |
778 |
assertEquals(0, lock.getWaitQueueLength(c)); |
779 |
locked1.countDown(); |
780 |
c.await(); |
781 |
lock.unlock(); |
782 |
}}); |
783 |
|
784 |
Thread t2 = new Thread(new CheckedRunnable() { |
785 |
public void realRun() throws InterruptedException { |
786 |
lock.lock(); |
787 |
assertTrue(lock.hasWaiters(c)); |
788 |
assertEquals(1, lock.getWaitQueueLength(c)); |
789 |
locked2.countDown(); |
790 |
c.await(); |
791 |
lock.unlock(); |
792 |
}}); |
793 |
|
794 |
lock.lock(); |
795 |
assertEquals(0, lock.getWaitQueueLength(c)); |
796 |
lock.unlock(); |
797 |
|
798 |
t1.start(); |
799 |
await(locked1); |
800 |
|
801 |
lock.lock(); |
802 |
assertHasWaiters(lock, c, t1); |
803 |
assertEquals(1, lock.getWaitQueueLength(c)); |
804 |
lock.unlock(); |
805 |
|
806 |
t2.start(); |
807 |
await(locked2); |
808 |
|
809 |
lock.lock(); |
810 |
assertHasWaiters(lock, c, t1, t2); |
811 |
assertEquals(2, lock.getWaitQueueLength(c)); |
812 |
c.signalAll(); |
813 |
assertHasNoWaiters(lock, c); |
814 |
lock.unlock(); |
815 |
|
816 |
awaitTermination(t1); |
817 |
awaitTermination(t2); |
818 |
|
819 |
assertHasNoWaiters(lock, c); |
820 |
} |
821 |
|
822 |
/** |
823 |
* getWaitingThreads returns only and all waiting threads |
824 |
*/ |
825 |
public void testGetWaitingThreads() { testGetWaitingThreads(false); } |
826 |
public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); } |
827 |
public void testGetWaitingThreads(boolean fair) { |
828 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
829 |
final Condition c = lock.newCondition(); |
830 |
final CountDownLatch locked1 = new CountDownLatch(1); |
831 |
final CountDownLatch locked2 = new CountDownLatch(1); |
832 |
Thread t1 = new Thread(new CheckedRunnable() { |
833 |
public void realRun() throws InterruptedException { |
834 |
lock.lock(); |
835 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
836 |
locked1.countDown(); |
837 |
c.await(); |
838 |
lock.unlock(); |
839 |
}}); |
840 |
|
841 |
Thread t2 = new Thread(new CheckedRunnable() { |
842 |
public void realRun() throws InterruptedException { |
843 |
lock.lock(); |
844 |
assertFalse(lock.getWaitingThreads(c).isEmpty()); |
845 |
locked2.countDown(); |
846 |
c.await(); |
847 |
lock.unlock(); |
848 |
}}); |
849 |
|
850 |
lock.lock(); |
851 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
852 |
lock.unlock(); |
853 |
|
854 |
t1.start(); |
855 |
await(locked1); |
856 |
|
857 |
lock.lock(); |
858 |
assertHasWaiters(lock, c, t1); |
859 |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
860 |
assertFalse(lock.getWaitingThreads(c).contains(t2)); |
861 |
assertEquals(1, lock.getWaitingThreads(c).size()); |
862 |
lock.unlock(); |
863 |
|
864 |
t2.start(); |
865 |
await(locked2); |
866 |
|
867 |
lock.lock(); |
868 |
assertHasWaiters(lock, c, t1, t2); |
869 |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
870 |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
871 |
assertEquals(2, lock.getWaitingThreads(c).size()); |
872 |
c.signalAll(); |
873 |
assertHasNoWaiters(lock, c); |
874 |
lock.unlock(); |
875 |
|
876 |
awaitTermination(t1); |
877 |
awaitTermination(t2); |
878 |
|
879 |
assertHasNoWaiters(lock, c); |
880 |
} |
881 |
|
882 |
/** |
883 |
* awaitUninterruptibly is uninterruptible |
884 |
*/ |
885 |
public void testAwaitUninterruptibly() { testAwaitUninterruptibly(false); } |
886 |
public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); } |
887 |
public void testAwaitUninterruptibly(boolean fair) { |
888 |
final ReentrantLock lock = new ReentrantLock(fair); |
889 |
final Condition c = lock.newCondition(); |
890 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
891 |
|
892 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
893 |
public void realRun() { |
894 |
// Interrupt before awaitUninterruptibly |
895 |
lock.lock(); |
896 |
pleaseInterrupt.countDown(); |
897 |
Thread.currentThread().interrupt(); |
898 |
c.awaitUninterruptibly(); |
899 |
assertTrue(Thread.interrupted()); |
900 |
lock.unlock(); |
901 |
}}); |
902 |
|
903 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
904 |
public void realRun() { |
905 |
// Interrupt during awaitUninterruptibly |
906 |
lock.lock(); |
907 |
pleaseInterrupt.countDown(); |
908 |
c.awaitUninterruptibly(); |
909 |
assertTrue(Thread.interrupted()); |
910 |
lock.unlock(); |
911 |
}}); |
912 |
|
913 |
await(pleaseInterrupt); |
914 |
lock.lock(); |
915 |
lock.unlock(); |
916 |
t2.interrupt(); |
917 |
|
918 |
assertThreadStaysAlive(t1); |
919 |
assertTrue(t2.isAlive()); |
920 |
|
921 |
lock.lock(); |
922 |
c.signalAll(); |
923 |
lock.unlock(); |
924 |
|
925 |
awaitTermination(t1); |
926 |
awaitTermination(t2); |
927 |
} |
928 |
|
929 |
/** |
930 |
* await/awaitNanos/awaitUntil is interruptible |
931 |
*/ |
932 |
public void testInterruptible_await() { testInterruptible(false, AwaitMethod.await); } |
933 |
public void testInterruptible_await_fair() { testInterruptible(true, AwaitMethod.await); } |
934 |
public void testInterruptible_awaitTimed() { testInterruptible(false, AwaitMethod.awaitTimed); } |
935 |
public void testInterruptible_awaitTimed_fair() { testInterruptible(true, AwaitMethod.awaitTimed); } |
936 |
public void testInterruptible_awaitNanos() { testInterruptible(false, AwaitMethod.awaitNanos); } |
937 |
public void testInterruptible_awaitNanos_fair() { testInterruptible(true, AwaitMethod.awaitNanos); } |
938 |
public void testInterruptible_awaitUntil() { testInterruptible(false, AwaitMethod.awaitUntil); } |
939 |
public void testInterruptible_awaitUntil_fair() { testInterruptible(true, AwaitMethod.awaitUntil); } |
940 |
public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) { |
941 |
final PublicReentrantLock lock = |
942 |
new PublicReentrantLock(fair); |
943 |
final Condition c = lock.newCondition(); |
944 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
945 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
946 |
public void realRun() throws InterruptedException { |
947 |
lock.lock(); |
948 |
assertLockedByMoi(lock); |
949 |
assertHasNoWaiters(lock, c); |
950 |
pleaseInterrupt.countDown(); |
951 |
try { |
952 |
await(c, awaitMethod); |
953 |
} finally { |
954 |
assertLockedByMoi(lock); |
955 |
assertHasNoWaiters(lock, c); |
956 |
lock.unlock(); |
957 |
assertFalse(Thread.interrupted()); |
958 |
} |
959 |
}}); |
960 |
|
961 |
await(pleaseInterrupt); |
962 |
assertHasWaiters(lock, c, t); |
963 |
t.interrupt(); |
964 |
awaitTermination(t); |
965 |
assertNotLocked(lock); |
966 |
} |
967 |
|
968 |
/** |
969 |
* signalAll wakes up all threads |
970 |
*/ |
971 |
public void testSignalAll_await() { testSignalAll(false, AwaitMethod.await); } |
972 |
public void testSignalAll_await_fair() { testSignalAll(true, AwaitMethod.await); } |
973 |
public void testSignalAll_awaitTimed() { testSignalAll(false, AwaitMethod.awaitTimed); } |
974 |
public void testSignalAll_awaitTimed_fair() { testSignalAll(true, AwaitMethod.awaitTimed); } |
975 |
public void testSignalAll_awaitNanos() { testSignalAll(false, AwaitMethod.awaitNanos); } |
976 |
public void testSignalAll_awaitNanos_fair() { testSignalAll(true, AwaitMethod.awaitNanos); } |
977 |
public void testSignalAll_awaitUntil() { testSignalAll(false, AwaitMethod.awaitUntil); } |
978 |
public void testSignalAll_awaitUntil_fair() { testSignalAll(true, AwaitMethod.awaitUntil); } |
979 |
public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) { |
980 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
981 |
final Condition c = lock.newCondition(); |
982 |
final CountDownLatch pleaseSignal = new CountDownLatch(2); |
983 |
class Awaiter extends CheckedRunnable { |
984 |
public void realRun() throws InterruptedException { |
985 |
lock.lock(); |
986 |
pleaseSignal.countDown(); |
987 |
await(c, awaitMethod); |
988 |
lock.unlock(); |
989 |
} |
990 |
} |
991 |
|
992 |
Thread t1 = newStartedThread(new Awaiter()); |
993 |
Thread t2 = newStartedThread(new Awaiter()); |
994 |
|
995 |
await(pleaseSignal); |
996 |
lock.lock(); |
997 |
assertHasWaiters(lock, c, t1, t2); |
998 |
c.signalAll(); |
999 |
assertHasNoWaiters(lock, c); |
1000 |
lock.unlock(); |
1001 |
awaitTermination(t1); |
1002 |
awaitTermination(t2); |
1003 |
} |
1004 |
|
1005 |
/** |
1006 |
* signal wakes up waiting threads in FIFO order |
1007 |
*/ |
1008 |
public void testSignalWakesFifo() { testSignalWakesFifo(false); } |
1009 |
public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); } |
1010 |
public void testSignalWakesFifo(boolean fair) { |
1011 |
final PublicReentrantLock lock = |
1012 |
new PublicReentrantLock(fair); |
1013 |
final Condition c = lock.newCondition(); |
1014 |
final CountDownLatch locked1 = new CountDownLatch(1); |
1015 |
final CountDownLatch locked2 = new CountDownLatch(1); |
1016 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
1017 |
public void realRun() throws InterruptedException { |
1018 |
lock.lock(); |
1019 |
locked1.countDown(); |
1020 |
c.await(); |
1021 |
lock.unlock(); |
1022 |
}}); |
1023 |
|
1024 |
await(locked1); |
1025 |
|
1026 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1027 |
public void realRun() throws InterruptedException { |
1028 |
lock.lock(); |
1029 |
locked2.countDown(); |
1030 |
c.await(); |
1031 |
lock.unlock(); |
1032 |
}}); |
1033 |
|
1034 |
await(locked2); |
1035 |
|
1036 |
lock.lock(); |
1037 |
assertHasWaiters(lock, c, t1, t2); |
1038 |
assertFalse(lock.hasQueuedThreads()); |
1039 |
c.signal(); |
1040 |
assertHasWaiters(lock, c, t2); |
1041 |
assertTrue(lock.hasQueuedThread(t1)); |
1042 |
assertFalse(lock.hasQueuedThread(t2)); |
1043 |
c.signal(); |
1044 |
assertHasNoWaiters(lock, c); |
1045 |
assertTrue(lock.hasQueuedThread(t1)); |
1046 |
assertTrue(lock.hasQueuedThread(t2)); |
1047 |
lock.unlock(); |
1048 |
awaitTermination(t1); |
1049 |
awaitTermination(t2); |
1050 |
} |
1051 |
|
1052 |
/** |
1053 |
* await after multiple reentrant locking preserves lock count |
1054 |
*/ |
1055 |
public void testAwaitLockCount() { testAwaitLockCount(false); } |
1056 |
public void testAwaitLockCount_fair() { testAwaitLockCount(true); } |
1057 |
public void testAwaitLockCount(boolean fair) { |
1058 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
1059 |
final Condition c = lock.newCondition(); |
1060 |
final CountDownLatch pleaseSignal = new CountDownLatch(2); |
1061 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
1062 |
public void realRun() throws InterruptedException { |
1063 |
lock.lock(); |
1064 |
assertLockedByMoi(lock); |
1065 |
assertEquals(1, lock.getHoldCount()); |
1066 |
pleaseSignal.countDown(); |
1067 |
c.await(); |
1068 |
assertLockedByMoi(lock); |
1069 |
assertEquals(1, lock.getHoldCount()); |
1070 |
lock.unlock(); |
1071 |
}}); |
1072 |
|
1073 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1074 |
public void realRun() throws InterruptedException { |
1075 |
lock.lock(); |
1076 |
lock.lock(); |
1077 |
assertLockedByMoi(lock); |
1078 |
assertEquals(2, lock.getHoldCount()); |
1079 |
pleaseSignal.countDown(); |
1080 |
c.await(); |
1081 |
assertLockedByMoi(lock); |
1082 |
assertEquals(2, lock.getHoldCount()); |
1083 |
lock.unlock(); |
1084 |
lock.unlock(); |
1085 |
}}); |
1086 |
|
1087 |
await(pleaseSignal); |
1088 |
lock.lock(); |
1089 |
assertHasWaiters(lock, c, t1, t2); |
1090 |
assertEquals(1, lock.getHoldCount()); |
1091 |
c.signalAll(); |
1092 |
assertHasNoWaiters(lock, c); |
1093 |
lock.unlock(); |
1094 |
awaitTermination(t1); |
1095 |
awaitTermination(t2); |
1096 |
} |
1097 |
|
1098 |
/** |
1099 |
* A serialized lock deserializes as unlocked |
1100 |
*/ |
1101 |
public void testSerialization() { testSerialization(false); } |
1102 |
public void testSerialization_fair() { testSerialization(true); } |
1103 |
public void testSerialization(boolean fair) { |
1104 |
ReentrantLock lock = new ReentrantLock(fair); |
1105 |
lock.lock(); |
1106 |
|
1107 |
ReentrantLock clone = serialClone(lock); |
1108 |
assertEquals(lock.isFair(), clone.isFair()); |
1109 |
assertTrue(lock.isLocked()); |
1110 |
assertFalse(clone.isLocked()); |
1111 |
assertEquals(1, lock.getHoldCount()); |
1112 |
assertEquals(0, clone.getHoldCount()); |
1113 |
clone.lock(); |
1114 |
clone.lock(); |
1115 |
assertTrue(clone.isLocked()); |
1116 |
assertEquals(2, clone.getHoldCount()); |
1117 |
assertEquals(1, lock.getHoldCount()); |
1118 |
clone.unlock(); |
1119 |
clone.unlock(); |
1120 |
assertTrue(lock.isLocked()); |
1121 |
assertFalse(clone.isLocked()); |
1122 |
} |
1123 |
|
1124 |
/** |
1125 |
* toString indicates current lock state |
1126 |
*/ |
1127 |
public void testToString() { testToString(false); } |
1128 |
public void testToString_fair() { testToString(true); } |
1129 |
public void testToString(boolean fair) { |
1130 |
ReentrantLock lock = new ReentrantLock(fair); |
1131 |
assertTrue(lock.toString().contains("Unlocked")); |
1132 |
lock.lock(); |
1133 |
assertTrue(lock.toString().contains("Locked")); |
1134 |
lock.unlock(); |
1135 |
assertTrue(lock.toString().contains("Unlocked")); |
1136 |
} |
1137 |
} |