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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.concurrent.locks.Condition; |
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import java.util.concurrent.locks.ReentrantLock; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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|
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.HashSet; |
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.CyclicBarrier; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import java.util.*; |
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import java.util.concurrent.locks.Condition; |
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import java.util.concurrent.locks.ReentrantLock; |
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|
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import junit.framework.AssertionFailedError; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class 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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main(suite(), args); |
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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 |
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* A checked runnable calling lockInterruptibly |
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*/ |
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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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InterruptibleLockRunnable(ReentrantLock lock) { this.lock = lock; } |
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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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* A runnable calling lockInterruptibly that expects to be |
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* A checked 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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InterruptedLockRunnable(ReentrantLock lock) { this.lock = lock; } |
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public void realRun() throws InterruptedException { |
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lock.lockInterruptibly(); |
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} |
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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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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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* Awaits condition "indefinitely" using the specified AwaitMethod. |
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*/ |
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void await(Condition c, AwaitMethod awaitMethod) |
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throws InterruptedException { |
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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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long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
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long nanosRemaining = c.awaitNanos(timeoutNanos); |
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assertTrue(nanosRemaining > timeoutNanos / 2); |
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assertTrue(nanosRemaining <= timeoutNanos); |
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break; |
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case awaitUntil: |
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assertTrue(c.awaitUntil(delayedDate(timeoutMillis))); |
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break; |
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default: |
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throw new AssertionError(); |
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} |
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} |
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|
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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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final 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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public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); } |
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public void testTryLock_Timeout(boolean fair) { |
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final PublicReentrantLock lock = new PublicReentrantLock(fair); |
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final long timeoutMillis = timeoutMillis(); |
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lock.lock(); |
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Thread t = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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long startTime = System.nanoTime(); |
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long timeoutMillis = 10; |
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assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS)); |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
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}}); |
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public void testGetHoldCount() { testGetHoldCount(false); } |
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public void testGetHoldCount_fair() { testGetHoldCount(true); } |
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public void testGetHoldCount(boolean fair) { |
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ReentrantLock lock = new ReentrantLock(fair); |
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final ReentrantLock lock = new ReentrantLock(fair); |
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for (int i = 1; i <= SIZE; i++) { |
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lock.lock(); |
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assertEquals(i, lock.getHoldCount()); |
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} |
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for (int i = SIZE; i > 0; i--) { |
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lock.unlock(); |
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assertEquals(i-1, lock.getHoldCount()); |
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assertEquals(i - 1, lock.getHoldCount()); |
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} |
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} |
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|
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public void testIsLocked() { testIsLocked(false); } |
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public void testIsLocked_fair() { testIsLocked(true); } |
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public void testIsLocked(boolean fair) { |
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final ReentrantLock lock = new ReentrantLock(fair); |
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try { |
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final ReentrantLock lock = new ReentrantLock(fair); |
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assertFalse(lock.isLocked()); |
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lock.lock(); |
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assertTrue(lock.isLocked()); |
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barrier.await(); |
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awaitTermination(t); |
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assertFalse(lock.isLocked()); |
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} catch (Exception e) { |
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threadUnexpectedException(e); |
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} |
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} catch (Exception fail) { threadUnexpectedException(fail); } |
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} |
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|
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/** |
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final PublicReentrantLock lock = new PublicReentrantLock(fair); |
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try { |
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lock.lockInterruptibly(); |
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} catch (InterruptedException ie) { |
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threadUnexpectedException(ie); |
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} |
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} catch (InterruptedException fail) { threadUnexpectedException(fail); } |
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assertLockedByMoi(lock); |
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Thread t = newStartedThread(new InterruptedLockRunnable(lock)); |
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waitForQueuedThread(lock, t); |
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public void testAwaitNanos_Timeout() { testAwaitNanos_Timeout(false); } |
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public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); } |
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public void testAwaitNanos_Timeout(boolean fair) { |
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final ReentrantLock lock = new ReentrantLock(fair); |
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final Condition c = lock.newCondition(); |
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final long timeoutMillis = timeoutMillis(); |
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final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
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lock.lock(); |
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final long startTime = System.nanoTime(); |
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try { |
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final ReentrantLock lock = new ReentrantLock(fair); |
523 |
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final Condition c = lock.newCondition(); |
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lock.lock(); |
525 |
– |
long startTime = System.nanoTime(); |
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long timeoutMillis = 10; |
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– |
long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
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long nanosRemaining = c.awaitNanos(timeoutNanos); |
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assertTrue(nanosRemaining <= 0); |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
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lock.unlock(); |
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} catch (InterruptedException e) { |
533 |
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threadUnexpectedException(e); |
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} |
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} catch (InterruptedException fail) { threadUnexpectedException(fail); } |
536 |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
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lock.unlock(); |
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} |
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|
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/** |
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public void testAwait_Timeout() { testAwait_Timeout(false); } |
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public void testAwait_Timeout_fair() { testAwait_Timeout(true); } |
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public void testAwait_Timeout(boolean fair) { |
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final ReentrantLock lock = new ReentrantLock(fair); |
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final Condition c = lock.newCondition(); |
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final long timeoutMillis = timeoutMillis(); |
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lock.lock(); |
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final long startTime = System.nanoTime(); |
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try { |
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final ReentrantLock lock = new ReentrantLock(fair); |
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final Condition c = lock.newCondition(); |
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lock.lock(); |
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long startTime = System.nanoTime(); |
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long timeoutMillis = 10; |
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assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
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lock.unlock(); |
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} catch (InterruptedException e) { |
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threadUnexpectedException(e); |
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} |
553 |
> |
} catch (InterruptedException fail) { threadUnexpectedException(fail); } |
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> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
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> |
lock.unlock(); |
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} |
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|
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/** |
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public void testAwaitUntil_Timeout() { testAwaitUntil_Timeout(false); } |
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public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); } |
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public void testAwaitUntil_Timeout(boolean fair) { |
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final ReentrantLock lock = new ReentrantLock(fair); |
565 |
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final Condition c = lock.newCondition(); |
566 |
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lock.lock(); |
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// We shouldn't assume that nanoTime and currentTimeMillis |
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// use the same time source, so don't use nanoTime here. |
569 |
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final java.util.Date delayedDate = delayedDate(timeoutMillis()); |
570 |
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try { |
571 |
< |
final ReentrantLock lock = new ReentrantLock(fair); |
572 |
< |
final Condition c = lock.newCondition(); |
573 |
< |
lock.lock(); |
574 |
< |
long startTime = System.nanoTime(); |
568 |
< |
long timeoutMillis = 10; |
569 |
< |
java.util.Date d = new java.util.Date(); |
570 |
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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 |
< |
} |
571 |
> |
assertFalse(c.awaitUntil(delayedDate)); |
572 |
> |
} catch (InterruptedException fail) { threadUnexpectedException(fail); } |
573 |
> |
assertTrue(new java.util.Date().getTime() >= delayedDate.getTime()); |
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> |
lock.unlock(); |
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} |
576 |
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|
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/** |
885 |
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public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); } |
886 |
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public void testAwaitUninterruptibly(boolean fair) { |
887 |
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final ReentrantLock lock = new ReentrantLock(fair); |
888 |
< |
final Condition c = lock.newCondition(); |
888 |
> |
final Condition condition = lock.newCondition(); |
889 |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
890 |
|
|
891 |
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Thread t1 = newStartedThread(new CheckedRunnable() { |
894 |
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lock.lock(); |
895 |
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pleaseInterrupt.countDown(); |
896 |
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Thread.currentThread().interrupt(); |
897 |
< |
c.awaitUninterruptibly(); |
897 |
> |
condition.awaitUninterruptibly(); |
898 |
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assertTrue(Thread.interrupted()); |
899 |
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lock.unlock(); |
900 |
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}}); |
904 |
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// Interrupt during awaitUninterruptibly |
905 |
|
lock.lock(); |
906 |
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pleaseInterrupt.countDown(); |
907 |
< |
c.awaitUninterruptibly(); |
907 |
> |
condition.awaitUninterruptibly(); |
908 |
|
assertTrue(Thread.interrupted()); |
909 |
|
lock.unlock(); |
910 |
|
}}); |
911 |
|
|
912 |
|
await(pleaseInterrupt); |
913 |
+ |
t2.interrupt(); |
914 |
|
lock.lock(); |
915 |
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lock.unlock(); |
916 |
< |
t2.interrupt(); |
917 |
< |
|
918 |
< |
assertThreadStaysAlive(t1); |
919 |
< |
assertTrue(t2.isAlive()); |
916 |
> |
assertThreadBlocks(t1, Thread.State.WAITING); |
917 |
> |
assertThreadBlocks(t2, Thread.State.WAITING); |
918 |
|
|
919 |
|
lock.lock(); |
920 |
< |
c.signalAll(); |
920 |
> |
condition.signalAll(); |
921 |
|
lock.unlock(); |
922 |
|
|
923 |
|
awaitTermination(t1); |
1099 |
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public void testSerialization() { testSerialization(false); } |
1100 |
|
public void testSerialization_fair() { testSerialization(true); } |
1101 |
|
public void testSerialization(boolean fair) { |
1102 |
< |
ReentrantLock lock = new ReentrantLock(fair); |
1102 |
> |
final ReentrantLock lock = new ReentrantLock(fair); |
1103 |
|
lock.lock(); |
1104 |
|
|
1105 |
|
ReentrantLock clone = serialClone(lock); |
1125 |
|
public void testToString() { testToString(false); } |
1126 |
|
public void testToString_fair() { testToString(true); } |
1127 |
|
public void testToString(boolean fair) { |
1128 |
< |
ReentrantLock lock = new ReentrantLock(fair); |
1128 |
> |
final ReentrantLock lock = new ReentrantLock(fair); |
1129 |
|
assertTrue(lock.toString().contains("Unlocked")); |
1130 |
|
lock.lock(); |
1131 |
< |
assertTrue(lock.toString().contains("Locked")); |
1131 |
> |
assertTrue(lock.toString().contains("Locked by")); |
1132 |
|
lock.unlock(); |
1133 |
|
assertTrue(lock.toString().contains("Unlocked")); |
1134 |
|
} |