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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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|
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|
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import java.util.concurrent.locks.*; |
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import java.io.*; |
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|
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public class AbstractQueuedLongSynchronizerTest 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(AbstractQueuedLongSynchronizerTest.class); |
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} |
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|
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/** |
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* A simple mutex class, adapted from the |
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* AbstractQueuedLongSynchronizer javadoc. Exclusive acquire tests |
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* exercise this as a sample user extension. Other |
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* methods/features of AbstractQueuedLongSynchronizerTest are tested |
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* via other test classes, including those for ReentrantLock, |
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* ReentrantReadWriteLock, and Semaphore |
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*/ |
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static class Mutex extends AbstractQueuedLongSynchronizer { |
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// Use value > 32 bits for locked state |
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static final long LOCKED = 1 << 48; |
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public boolean isHeldExclusively() { |
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return getState() == LOCKED; |
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} |
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|
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public boolean tryAcquire(long acquires) { |
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return compareAndSetState(0, LOCKED); |
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} |
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|
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public boolean tryRelease(long releases) { |
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if (getState() == 0) throw new IllegalMonitorStateException(); |
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setState(0); |
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return true; |
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} |
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|
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public AbstractQueuedLongSynchronizer.ConditionObject newCondition() { return new AbstractQueuedLongSynchronizer.ConditionObject(); } |
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|
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} |
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|
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|
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/** |
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* A simple latch class, to test shared mode. |
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*/ |
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static class BooleanLatch extends AbstractQueuedLongSynchronizer { |
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public boolean isSignalled() { return getState() != 0; } |
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|
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public long tryAcquireShared(long ignore) { |
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return isSignalled()? 1 : -1; |
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} |
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|
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public boolean tryReleaseShared(long ignore) { |
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setState(1 << 62); |
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return true; |
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} |
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} |
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|
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/** |
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* A runnable calling acquireInterruptibly |
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*/ |
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class InterruptibleSyncRunnable implements Runnable { |
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final Mutex sync; |
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InterruptibleSyncRunnable(Mutex l) { sync = l; } |
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public void run() { |
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try { |
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sync.acquireInterruptibly(1); |
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} catch (InterruptedException success){} |
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} |
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} |
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|
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|
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/** |
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* A runnable calling acquireInterruptibly that expects to be |
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* interrupted |
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*/ |
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class InterruptedSyncRunnable implements Runnable { |
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final Mutex sync; |
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InterruptedSyncRunnable(Mutex l) { sync = l; } |
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public void run() { |
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try { |
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sync.acquireInterruptibly(1); |
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threadShouldThrow(); |
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} catch (InterruptedException success){} |
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} |
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} |
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|
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/** |
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* isHeldExclusively is false upon construction |
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*/ |
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public void testIsHeldExclusively() { |
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Mutex rl = new Mutex(); |
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assertFalse(rl.isHeldExclusively()); |
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} |
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|
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/** |
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* acquiring released sync succeeds |
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*/ |
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public void testAcquire() { |
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Mutex rl = new Mutex(); |
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rl.acquire(1); |
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assertTrue(rl.isHeldExclusively()); |
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rl.release(1); |
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assertFalse(rl.isHeldExclusively()); |
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} |
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|
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/** |
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* tryAcquire on an released sync succeeds |
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*/ |
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public void testTryAcquire() { |
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Mutex rl = new Mutex(); |
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assertTrue(rl.tryAcquire(1)); |
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assertTrue(rl.isHeldExclusively()); |
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rl.release(1); |
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} |
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|
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/** |
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* hasQueuedThreads reports whether there are waiting threads |
130 |
*/ |
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public void testhasQueuedThreads() { |
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final Mutex sync = new Mutex(); |
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Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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try { |
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assertFalse(sync.hasQueuedThreads()); |
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sync.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasQueuedThreads()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasQueuedThreads()); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasQueuedThreads()); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.hasQueuedThreads()); |
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t1.join(); |
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t2.join(); |
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} catch (Exception e){ |
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unexpectedException(); |
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} |
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} |
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|
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/** |
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* isQueued(null) throws NPE |
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*/ |
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public void testIsQueuedNPE() { |
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final Mutex sync = new Mutex(); |
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try { |
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sync.isQueued(null); |
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shouldThrow(); |
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} catch (NullPointerException success) { |
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} |
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} |
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|
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/** |
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* isQueued reports whether a thread is queued. |
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*/ |
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public void testIsQueued() { |
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final Mutex sync = new Mutex(); |
174 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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try { |
177 |
assertFalse(sync.isQueued(t1)); |
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assertFalse(sync.isQueued(t2)); |
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sync.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.isQueued(t1)); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.isQueued(t1)); |
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assertTrue(sync.isQueued(t2)); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.isQueued(t1)); |
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assertTrue(sync.isQueued(t2)); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.isQueued(t1)); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.isQueued(t2)); |
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t1.join(); |
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t2.join(); |
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} catch (Exception e){ |
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unexpectedException(); |
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} |
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} |
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|
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/** |
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* getFirstQueuedThread returns first waiting thread or null if none |
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*/ |
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public void testGetFirstQueuedThread() { |
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final Mutex sync = new Mutex(); |
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Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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try { |
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assertNull(sync.getFirstQueuedThread()); |
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sync.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(t1, sync.getFirstQueuedThread()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(t1, sync.getFirstQueuedThread()); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(t2, sync.getFirstQueuedThread()); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertNull(sync.getFirstQueuedThread()); |
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t1.join(); |
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t2.join(); |
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} catch (Exception e){ |
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unexpectedException(); |
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} |
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} |
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|
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|
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/** |
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* hasContended reports false if no thread has ever blocked, else true |
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*/ |
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public void testHasContended() { |
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final Mutex sync = new Mutex(); |
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Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
241 |
try { |
242 |
assertFalse(sync.hasContended()); |
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sync.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
246 |
assertTrue(sync.hasContended()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
249 |
assertTrue(sync.hasContended()); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasContended()); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasContended()); |
256 |
t1.join(); |
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t2.join(); |
258 |
} catch (Exception e){ |
259 |
unexpectedException(); |
260 |
} |
261 |
} |
262 |
|
263 |
/** |
264 |
* getQueuedThreads includes waiting threads |
265 |
*/ |
266 |
public void testGetQueuedThreads() { |
267 |
final Mutex sync = new Mutex(); |
268 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
269 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
270 |
try { |
271 |
assertTrue(sync.getQueuedThreads().isEmpty()); |
272 |
sync.acquire(1); |
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assertTrue(sync.getQueuedThreads().isEmpty()); |
274 |
t1.start(); |
275 |
Thread.sleep(SHORT_DELAY_MS); |
276 |
assertTrue(sync.getQueuedThreads().contains(t1)); |
277 |
t2.start(); |
278 |
Thread.sleep(SHORT_DELAY_MS); |
279 |
assertTrue(sync.getQueuedThreads().contains(t1)); |
280 |
assertTrue(sync.getQueuedThreads().contains(t2)); |
281 |
t1.interrupt(); |
282 |
Thread.sleep(SHORT_DELAY_MS); |
283 |
assertFalse(sync.getQueuedThreads().contains(t1)); |
284 |
assertTrue(sync.getQueuedThreads().contains(t2)); |
285 |
sync.release(1); |
286 |
Thread.sleep(SHORT_DELAY_MS); |
287 |
assertTrue(sync.getQueuedThreads().isEmpty()); |
288 |
t1.join(); |
289 |
t2.join(); |
290 |
} catch (Exception e){ |
291 |
unexpectedException(); |
292 |
} |
293 |
} |
294 |
|
295 |
/** |
296 |
* getExclusiveQueuedThreads includes waiting threads |
297 |
*/ |
298 |
public void testGetExclusiveQueuedThreads() { |
299 |
final Mutex sync = new Mutex(); |
300 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
301 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
302 |
try { |
303 |
assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
304 |
sync.acquire(1); |
305 |
assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
306 |
t1.start(); |
307 |
Thread.sleep(SHORT_DELAY_MS); |
308 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
309 |
t2.start(); |
310 |
Thread.sleep(SHORT_DELAY_MS); |
311 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
312 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
313 |
t1.interrupt(); |
314 |
Thread.sleep(SHORT_DELAY_MS); |
315 |
assertFalse(sync.getExclusiveQueuedThreads().contains(t1)); |
316 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
317 |
sync.release(1); |
318 |
Thread.sleep(SHORT_DELAY_MS); |
319 |
assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
320 |
t1.join(); |
321 |
t2.join(); |
322 |
} catch (Exception e){ |
323 |
unexpectedException(); |
324 |
} |
325 |
} |
326 |
|
327 |
/** |
328 |
* getSharedQueuedThreads does not include exclusively waiting threads |
329 |
*/ |
330 |
public void testGetSharedQueuedThreads() { |
331 |
final Mutex sync = new Mutex(); |
332 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
333 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
334 |
try { |
335 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
336 |
sync.acquire(1); |
337 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
338 |
t1.start(); |
339 |
Thread.sleep(SHORT_DELAY_MS); |
340 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
341 |
t2.start(); |
342 |
Thread.sleep(SHORT_DELAY_MS); |
343 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
344 |
t1.interrupt(); |
345 |
Thread.sleep(SHORT_DELAY_MS); |
346 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
347 |
sync.release(1); |
348 |
Thread.sleep(SHORT_DELAY_MS); |
349 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
350 |
t1.join(); |
351 |
t2.join(); |
352 |
} catch (Exception e){ |
353 |
unexpectedException(); |
354 |
} |
355 |
} |
356 |
|
357 |
/** |
358 |
* tryAcquireNanos is interruptible. |
359 |
*/ |
360 |
public void testInterruptedException2() { |
361 |
final Mutex sync = new Mutex(); |
362 |
sync.acquire(1); |
363 |
Thread t = new Thread(new Runnable() { |
364 |
public void run() { |
365 |
try { |
366 |
sync.tryAcquireNanos(1, MEDIUM_DELAY_MS * 1000 * 1000); |
367 |
threadShouldThrow(); |
368 |
} catch (InterruptedException success){} |
369 |
} |
370 |
}); |
371 |
try { |
372 |
t.start(); |
373 |
t.interrupt(); |
374 |
} catch (Exception e){ |
375 |
unexpectedException(); |
376 |
} |
377 |
} |
378 |
|
379 |
|
380 |
/** |
381 |
* TryAcquire on exclusively held sync fails |
382 |
*/ |
383 |
public void testTryAcquireWhenSynced() { |
384 |
final Mutex sync = new Mutex(); |
385 |
sync.acquire(1); |
386 |
Thread t = new Thread(new Runnable() { |
387 |
public void run() { |
388 |
threadAssertFalse(sync.tryAcquire(1)); |
389 |
} |
390 |
}); |
391 |
try { |
392 |
t.start(); |
393 |
t.join(); |
394 |
sync.release(1); |
395 |
} catch (Exception e){ |
396 |
unexpectedException(); |
397 |
} |
398 |
} |
399 |
|
400 |
/** |
401 |
* tryAcquireNanos on an exclusively held sync times out |
402 |
*/ |
403 |
public void testAcquireNanos_Timeout() { |
404 |
final Mutex sync = new Mutex(); |
405 |
sync.acquire(1); |
406 |
Thread t = new Thread(new Runnable() { |
407 |
public void run() { |
408 |
try { |
409 |
threadAssertFalse(sync.tryAcquireNanos(1, 1000 * 1000)); |
410 |
} catch (Exception ex) { |
411 |
threadUnexpectedException(); |
412 |
} |
413 |
} |
414 |
}); |
415 |
try { |
416 |
t.start(); |
417 |
t.join(); |
418 |
sync.release(1); |
419 |
} catch (Exception e){ |
420 |
unexpectedException(); |
421 |
} |
422 |
} |
423 |
|
424 |
|
425 |
/** |
426 |
* getState is true when acquired and false when not |
427 |
*/ |
428 |
public void testGetState() { |
429 |
final Mutex sync = new Mutex(); |
430 |
sync.acquire(1); |
431 |
assertTrue(sync.isHeldExclusively()); |
432 |
sync.release(1); |
433 |
assertFalse(sync.isHeldExclusively()); |
434 |
Thread t = new Thread(new Runnable() { |
435 |
public void run() { |
436 |
sync.acquire(1); |
437 |
try { |
438 |
Thread.sleep(SMALL_DELAY_MS); |
439 |
} |
440 |
catch (Exception e) { |
441 |
threadUnexpectedException(); |
442 |
} |
443 |
sync.release(1); |
444 |
} |
445 |
}); |
446 |
try { |
447 |
t.start(); |
448 |
Thread.sleep(SHORT_DELAY_MS); |
449 |
assertTrue(sync.isHeldExclusively()); |
450 |
t.join(); |
451 |
assertFalse(sync.isHeldExclusively()); |
452 |
} catch (Exception e){ |
453 |
unexpectedException(); |
454 |
} |
455 |
} |
456 |
|
457 |
|
458 |
/** |
459 |
* acquireInterruptibly is interruptible. |
460 |
*/ |
461 |
public void testAcquireInterruptibly1() { |
462 |
final Mutex sync = new Mutex(); |
463 |
sync.acquire(1); |
464 |
Thread t = new Thread(new InterruptedSyncRunnable(sync)); |
465 |
try { |
466 |
t.start(); |
467 |
Thread.sleep(SHORT_DELAY_MS); |
468 |
t.interrupt(); |
469 |
Thread.sleep(SHORT_DELAY_MS); |
470 |
sync.release(1); |
471 |
t.join(); |
472 |
} catch (Exception e){ |
473 |
unexpectedException(); |
474 |
} |
475 |
} |
476 |
|
477 |
/** |
478 |
* acquireInterruptibly succeeds when released, else is interruptible |
479 |
*/ |
480 |
public void testAcquireInterruptibly2() { |
481 |
final Mutex sync = new Mutex(); |
482 |
try { |
483 |
sync.acquireInterruptibly(1); |
484 |
} catch (Exception e) { |
485 |
unexpectedException(); |
486 |
} |
487 |
Thread t = new Thread(new InterruptedSyncRunnable(sync)); |
488 |
try { |
489 |
t.start(); |
490 |
t.interrupt(); |
491 |
assertTrue(sync.isHeldExclusively()); |
492 |
t.join(); |
493 |
} catch (Exception e){ |
494 |
unexpectedException(); |
495 |
} |
496 |
} |
497 |
|
498 |
/** |
499 |
* owns is true for a condition created by sync else false |
500 |
*/ |
501 |
public void testOwns() { |
502 |
final Mutex sync = new Mutex(); |
503 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
504 |
final Mutex sync2 = new Mutex(); |
505 |
assertTrue(sync.owns(c)); |
506 |
assertFalse(sync2.owns(c)); |
507 |
} |
508 |
|
509 |
/** |
510 |
* Calling await without holding sync throws IllegalMonitorStateException |
511 |
*/ |
512 |
public void testAwait_IllegalMonitor() { |
513 |
final Mutex sync = new Mutex(); |
514 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
515 |
try { |
516 |
c.await(); |
517 |
shouldThrow(); |
518 |
} |
519 |
catch (IllegalMonitorStateException success) { |
520 |
} |
521 |
catch (Exception ex) { |
522 |
unexpectedException(); |
523 |
} |
524 |
} |
525 |
|
526 |
/** |
527 |
* Calling signal without holding sync throws IllegalMonitorStateException |
528 |
*/ |
529 |
public void testSignal_IllegalMonitor() { |
530 |
final Mutex sync = new Mutex(); |
531 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
532 |
try { |
533 |
c.signal(); |
534 |
shouldThrow(); |
535 |
} |
536 |
catch (IllegalMonitorStateException success) { |
537 |
} |
538 |
catch (Exception ex) { |
539 |
unexpectedException(); |
540 |
} |
541 |
} |
542 |
|
543 |
/** |
544 |
* awaitNanos without a signal times out |
545 |
*/ |
546 |
public void testAwaitNanos_Timeout() { |
547 |
final Mutex sync = new Mutex(); |
548 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
549 |
try { |
550 |
sync.acquire(1); |
551 |
long t = c.awaitNanos(100); |
552 |
assertTrue(t <= 0); |
553 |
sync.release(1); |
554 |
} |
555 |
catch (Exception ex) { |
556 |
unexpectedException(); |
557 |
} |
558 |
} |
559 |
|
560 |
/** |
561 |
* Timed await without a signal times out |
562 |
*/ |
563 |
public void testAwait_Timeout() { |
564 |
final Mutex sync = new Mutex(); |
565 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
566 |
try { |
567 |
sync.acquire(1); |
568 |
assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
569 |
sync.release(1); |
570 |
} |
571 |
catch (Exception ex) { |
572 |
unexpectedException(); |
573 |
} |
574 |
} |
575 |
|
576 |
/** |
577 |
* awaitUntil without a signal times out |
578 |
*/ |
579 |
public void testAwaitUntil_Timeout() { |
580 |
final Mutex sync = new Mutex(); |
581 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
582 |
try { |
583 |
sync.acquire(1); |
584 |
java.util.Date d = new java.util.Date(); |
585 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
586 |
sync.release(1); |
587 |
} |
588 |
catch (Exception ex) { |
589 |
unexpectedException(); |
590 |
} |
591 |
} |
592 |
|
593 |
/** |
594 |
* await returns when signalled |
595 |
*/ |
596 |
public void testAwait() { |
597 |
final Mutex sync = new Mutex(); |
598 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
599 |
Thread t = new Thread(new Runnable() { |
600 |
public void run() { |
601 |
try { |
602 |
sync.acquire(1); |
603 |
c.await(); |
604 |
sync.release(1); |
605 |
} |
606 |
catch (InterruptedException e) { |
607 |
threadUnexpectedException(); |
608 |
} |
609 |
} |
610 |
}); |
611 |
|
612 |
try { |
613 |
t.start(); |
614 |
Thread.sleep(SHORT_DELAY_MS); |
615 |
sync.acquire(1); |
616 |
c.signal(); |
617 |
sync.release(1); |
618 |
t.join(SHORT_DELAY_MS); |
619 |
assertFalse(t.isAlive()); |
620 |
} |
621 |
catch (Exception ex) { |
622 |
unexpectedException(); |
623 |
} |
624 |
} |
625 |
|
626 |
|
627 |
|
628 |
/** |
629 |
* hasWaiters throws NPE if null |
630 |
*/ |
631 |
public void testHasWaitersNPE() { |
632 |
final Mutex sync = new Mutex(); |
633 |
try { |
634 |
sync.hasWaiters(null); |
635 |
shouldThrow(); |
636 |
} catch (NullPointerException success) { |
637 |
} catch (Exception ex) { |
638 |
unexpectedException(); |
639 |
} |
640 |
} |
641 |
|
642 |
/** |
643 |
* getWaitQueueLength throws NPE if null |
644 |
*/ |
645 |
public void testGetWaitQueueLengthNPE() { |
646 |
final Mutex sync = new Mutex(); |
647 |
try { |
648 |
sync.getWaitQueueLength(null); |
649 |
shouldThrow(); |
650 |
} catch (NullPointerException success) { |
651 |
} catch (Exception ex) { |
652 |
unexpectedException(); |
653 |
} |
654 |
} |
655 |
|
656 |
|
657 |
/** |
658 |
* getWaitingThreads throws NPE if null |
659 |
*/ |
660 |
public void testGetWaitingThreadsNPE() { |
661 |
final Mutex sync = new Mutex(); |
662 |
try { |
663 |
sync.getWaitingThreads(null); |
664 |
shouldThrow(); |
665 |
} catch (NullPointerException success) { |
666 |
} catch (Exception ex) { |
667 |
unexpectedException(); |
668 |
} |
669 |
} |
670 |
|
671 |
|
672 |
/** |
673 |
* hasWaiters throws IAE if not owned |
674 |
*/ |
675 |
public void testHasWaitersIAE() { |
676 |
final Mutex sync = new Mutex(); |
677 |
final AbstractQueuedLongSynchronizer.ConditionObject c = (sync.newCondition()); |
678 |
final Mutex sync2 = new Mutex(); |
679 |
try { |
680 |
sync2.hasWaiters(c); |
681 |
shouldThrow(); |
682 |
} catch (IllegalArgumentException success) { |
683 |
} catch (Exception ex) { |
684 |
unexpectedException(); |
685 |
} |
686 |
} |
687 |
|
688 |
/** |
689 |
* hasWaiters throws IMSE if not synced |
690 |
*/ |
691 |
public void testHasWaitersIMSE() { |
692 |
final Mutex sync = new Mutex(); |
693 |
final AbstractQueuedLongSynchronizer.ConditionObject c = (sync.newCondition()); |
694 |
try { |
695 |
sync.hasWaiters(c); |
696 |
shouldThrow(); |
697 |
} catch (IllegalMonitorStateException success) { |
698 |
} catch (Exception ex) { |
699 |
unexpectedException(); |
700 |
} |
701 |
} |
702 |
|
703 |
|
704 |
/** |
705 |
* getWaitQueueLength throws IAE if not owned |
706 |
*/ |
707 |
public void testGetWaitQueueLengthIAE() { |
708 |
final Mutex sync = new Mutex(); |
709 |
final AbstractQueuedLongSynchronizer.ConditionObject c = (sync.newCondition()); |
710 |
final Mutex sync2 = new Mutex(); |
711 |
try { |
712 |
sync2.getWaitQueueLength(c); |
713 |
shouldThrow(); |
714 |
} catch (IllegalArgumentException success) { |
715 |
} catch (Exception ex) { |
716 |
unexpectedException(); |
717 |
} |
718 |
} |
719 |
|
720 |
/** |
721 |
* getWaitQueueLength throws IMSE if not synced |
722 |
*/ |
723 |
public void testGetWaitQueueLengthIMSE() { |
724 |
final Mutex sync = new Mutex(); |
725 |
final AbstractQueuedLongSynchronizer.ConditionObject c = (sync.newCondition()); |
726 |
try { |
727 |
sync.getWaitQueueLength(c); |
728 |
shouldThrow(); |
729 |
} catch (IllegalMonitorStateException success) { |
730 |
} catch (Exception ex) { |
731 |
unexpectedException(); |
732 |
} |
733 |
} |
734 |
|
735 |
|
736 |
/** |
737 |
* getWaitingThreads throws IAE if not owned |
738 |
*/ |
739 |
public void testGetWaitingThreadsIAE() { |
740 |
final Mutex sync = new Mutex(); |
741 |
final AbstractQueuedLongSynchronizer.ConditionObject c = (sync.newCondition()); |
742 |
final Mutex sync2 = new Mutex(); |
743 |
try { |
744 |
sync2.getWaitingThreads(c); |
745 |
shouldThrow(); |
746 |
} catch (IllegalArgumentException success) { |
747 |
} catch (Exception ex) { |
748 |
unexpectedException(); |
749 |
} |
750 |
} |
751 |
|
752 |
/** |
753 |
* getWaitingThreads throws IMSE if not synced |
754 |
*/ |
755 |
public void testGetWaitingThreadsIMSE() { |
756 |
final Mutex sync = new Mutex(); |
757 |
final AbstractQueuedLongSynchronizer.ConditionObject c = (sync.newCondition()); |
758 |
try { |
759 |
sync.getWaitingThreads(c); |
760 |
shouldThrow(); |
761 |
} catch (IllegalMonitorStateException success) { |
762 |
} catch (Exception ex) { |
763 |
unexpectedException(); |
764 |
} |
765 |
} |
766 |
|
767 |
|
768 |
|
769 |
/** |
770 |
* hasWaiters returns true when a thread is waiting, else false |
771 |
*/ |
772 |
public void testHasWaiters() { |
773 |
final Mutex sync = new Mutex(); |
774 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
775 |
Thread t = new Thread(new Runnable() { |
776 |
public void run() { |
777 |
try { |
778 |
sync.acquire(1); |
779 |
threadAssertFalse(sync.hasWaiters(c)); |
780 |
threadAssertEquals(0, sync.getWaitQueueLength(c)); |
781 |
c.await(); |
782 |
sync.release(1); |
783 |
} |
784 |
catch (InterruptedException e) { |
785 |
threadUnexpectedException(); |
786 |
} |
787 |
} |
788 |
}); |
789 |
|
790 |
try { |
791 |
t.start(); |
792 |
Thread.sleep(SHORT_DELAY_MS); |
793 |
sync.acquire(1); |
794 |
assertTrue(sync.hasWaiters(c)); |
795 |
assertEquals(1, sync.getWaitQueueLength(c)); |
796 |
c.signal(); |
797 |
sync.release(1); |
798 |
Thread.sleep(SHORT_DELAY_MS); |
799 |
sync.acquire(1); |
800 |
assertFalse(sync.hasWaiters(c)); |
801 |
assertEquals(0, sync.getWaitQueueLength(c)); |
802 |
sync.release(1); |
803 |
t.join(SHORT_DELAY_MS); |
804 |
assertFalse(t.isAlive()); |
805 |
} |
806 |
catch (Exception ex) { |
807 |
unexpectedException(); |
808 |
} |
809 |
} |
810 |
|
811 |
/** |
812 |
* getWaitQueueLength returns number of waiting threads |
813 |
*/ |
814 |
public void testGetWaitQueueLength() { |
815 |
final Mutex sync = new Mutex(); |
816 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
817 |
Thread t1 = new Thread(new Runnable() { |
818 |
public void run() { |
819 |
try { |
820 |
sync.acquire(1); |
821 |
threadAssertFalse(sync.hasWaiters(c)); |
822 |
threadAssertEquals(0, sync.getWaitQueueLength(c)); |
823 |
c.await(); |
824 |
sync.release(1); |
825 |
} |
826 |
catch (InterruptedException e) { |
827 |
threadUnexpectedException(); |
828 |
} |
829 |
} |
830 |
}); |
831 |
|
832 |
Thread t2 = new Thread(new Runnable() { |
833 |
public void run() { |
834 |
try { |
835 |
sync.acquire(1); |
836 |
threadAssertTrue(sync.hasWaiters(c)); |
837 |
threadAssertEquals(1, sync.getWaitQueueLength(c)); |
838 |
c.await(); |
839 |
sync.release(1); |
840 |
} |
841 |
catch (InterruptedException e) { |
842 |
threadUnexpectedException(); |
843 |
} |
844 |
} |
845 |
}); |
846 |
|
847 |
try { |
848 |
t1.start(); |
849 |
Thread.sleep(SHORT_DELAY_MS); |
850 |
t2.start(); |
851 |
Thread.sleep(SHORT_DELAY_MS); |
852 |
sync.acquire(1); |
853 |
assertTrue(sync.hasWaiters(c)); |
854 |
assertEquals(2, sync.getWaitQueueLength(c)); |
855 |
c.signalAll(); |
856 |
sync.release(1); |
857 |
Thread.sleep(SHORT_DELAY_MS); |
858 |
sync.acquire(1); |
859 |
assertFalse(sync.hasWaiters(c)); |
860 |
assertEquals(0, sync.getWaitQueueLength(c)); |
861 |
sync.release(1); |
862 |
t1.join(SHORT_DELAY_MS); |
863 |
t2.join(SHORT_DELAY_MS); |
864 |
assertFalse(t1.isAlive()); |
865 |
assertFalse(t2.isAlive()); |
866 |
} |
867 |
catch (Exception ex) { |
868 |
unexpectedException(); |
869 |
} |
870 |
} |
871 |
|
872 |
/** |
873 |
* getWaitingThreads returns only and all waiting threads |
874 |
*/ |
875 |
public void testGetWaitingThreads() { |
876 |
final Mutex sync = new Mutex(); |
877 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
878 |
Thread t1 = new Thread(new Runnable() { |
879 |
public void run() { |
880 |
try { |
881 |
sync.acquire(1); |
882 |
threadAssertTrue(sync.getWaitingThreads(c).isEmpty()); |
883 |
c.await(); |
884 |
sync.release(1); |
885 |
} |
886 |
catch (InterruptedException e) { |
887 |
threadUnexpectedException(); |
888 |
} |
889 |
} |
890 |
}); |
891 |
|
892 |
Thread t2 = new Thread(new Runnable() { |
893 |
public void run() { |
894 |
try { |
895 |
sync.acquire(1); |
896 |
threadAssertFalse(sync.getWaitingThreads(c).isEmpty()); |
897 |
c.await(); |
898 |
sync.release(1); |
899 |
} |
900 |
catch (InterruptedException e) { |
901 |
threadUnexpectedException(); |
902 |
} |
903 |
} |
904 |
}); |
905 |
|
906 |
try { |
907 |
sync.acquire(1); |
908 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
909 |
sync.release(1); |
910 |
t1.start(); |
911 |
Thread.sleep(SHORT_DELAY_MS); |
912 |
t2.start(); |
913 |
Thread.sleep(SHORT_DELAY_MS); |
914 |
sync.acquire(1); |
915 |
assertTrue(sync.hasWaiters(c)); |
916 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
917 |
assertTrue(sync.getWaitingThreads(c).contains(t2)); |
918 |
c.signalAll(); |
919 |
sync.release(1); |
920 |
Thread.sleep(SHORT_DELAY_MS); |
921 |
sync.acquire(1); |
922 |
assertFalse(sync.hasWaiters(c)); |
923 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
924 |
sync.release(1); |
925 |
t1.join(SHORT_DELAY_MS); |
926 |
t2.join(SHORT_DELAY_MS); |
927 |
assertFalse(t1.isAlive()); |
928 |
assertFalse(t2.isAlive()); |
929 |
} |
930 |
catch (Exception ex) { |
931 |
unexpectedException(); |
932 |
} |
933 |
} |
934 |
|
935 |
|
936 |
|
937 |
/** |
938 |
* awaitUninterruptibly doesn't abort on interrupt |
939 |
*/ |
940 |
public void testAwaitUninterruptibly() { |
941 |
final Mutex sync = new Mutex(); |
942 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
943 |
Thread t = new Thread(new Runnable() { |
944 |
public void run() { |
945 |
sync.acquire(1); |
946 |
c.awaitUninterruptibly(); |
947 |
sync.release(1); |
948 |
} |
949 |
}); |
950 |
|
951 |
try { |
952 |
t.start(); |
953 |
Thread.sleep(SHORT_DELAY_MS); |
954 |
t.interrupt(); |
955 |
sync.acquire(1); |
956 |
c.signal(); |
957 |
sync.release(1); |
958 |
t.join(SHORT_DELAY_MS); |
959 |
assertFalse(t.isAlive()); |
960 |
} |
961 |
catch (Exception ex) { |
962 |
unexpectedException(); |
963 |
} |
964 |
} |
965 |
|
966 |
/** |
967 |
* await is interruptible |
968 |
*/ |
969 |
public void testAwait_Interrupt() { |
970 |
final Mutex sync = new Mutex(); |
971 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
972 |
Thread t = new Thread(new Runnable() { |
973 |
public void run() { |
974 |
try { |
975 |
sync.acquire(1); |
976 |
c.await(); |
977 |
sync.release(1); |
978 |
threadShouldThrow(); |
979 |
} |
980 |
catch (InterruptedException success) { |
981 |
} |
982 |
} |
983 |
}); |
984 |
|
985 |
try { |
986 |
t.start(); |
987 |
Thread.sleep(SHORT_DELAY_MS); |
988 |
t.interrupt(); |
989 |
t.join(SHORT_DELAY_MS); |
990 |
assertFalse(t.isAlive()); |
991 |
} |
992 |
catch (Exception ex) { |
993 |
unexpectedException(); |
994 |
} |
995 |
} |
996 |
|
997 |
/** |
998 |
* awaitNanos is interruptible |
999 |
*/ |
1000 |
public void testAwaitNanos_Interrupt() { |
1001 |
final Mutex sync = new Mutex(); |
1002 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
1003 |
Thread t = new Thread(new Runnable() { |
1004 |
public void run() { |
1005 |
try { |
1006 |
sync.acquire(1); |
1007 |
c.awaitNanos(1000 * 1000 * 1000); // 1 sec |
1008 |
sync.release(1); |
1009 |
threadShouldThrow(); |
1010 |
} |
1011 |
catch (InterruptedException success) { |
1012 |
} |
1013 |
} |
1014 |
}); |
1015 |
|
1016 |
try { |
1017 |
t.start(); |
1018 |
Thread.sleep(SHORT_DELAY_MS); |
1019 |
t.interrupt(); |
1020 |
t.join(SHORT_DELAY_MS); |
1021 |
assertFalse(t.isAlive()); |
1022 |
} |
1023 |
catch (Exception ex) { |
1024 |
unexpectedException(); |
1025 |
} |
1026 |
} |
1027 |
|
1028 |
/** |
1029 |
* awaitUntil is interruptible |
1030 |
*/ |
1031 |
public void testAwaitUntil_Interrupt() { |
1032 |
final Mutex sync = new Mutex(); |
1033 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
1034 |
Thread t = new Thread(new Runnable() { |
1035 |
public void run() { |
1036 |
try { |
1037 |
sync.acquire(1); |
1038 |
java.util.Date d = new java.util.Date(); |
1039 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
1040 |
sync.release(1); |
1041 |
threadShouldThrow(); |
1042 |
} |
1043 |
catch (InterruptedException success) { |
1044 |
} |
1045 |
} |
1046 |
}); |
1047 |
|
1048 |
try { |
1049 |
t.start(); |
1050 |
Thread.sleep(SHORT_DELAY_MS); |
1051 |
t.interrupt(); |
1052 |
t.join(SHORT_DELAY_MS); |
1053 |
assertFalse(t.isAlive()); |
1054 |
} |
1055 |
catch (Exception ex) { |
1056 |
unexpectedException(); |
1057 |
} |
1058 |
} |
1059 |
|
1060 |
/** |
1061 |
* signalAll wakes up all threads |
1062 |
*/ |
1063 |
public void testSignalAll() { |
1064 |
final Mutex sync = new Mutex(); |
1065 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
1066 |
Thread t1 = new Thread(new Runnable() { |
1067 |
public void run() { |
1068 |
try { |
1069 |
sync.acquire(1); |
1070 |
c.await(); |
1071 |
sync.release(1); |
1072 |
} |
1073 |
catch (InterruptedException e) { |
1074 |
threadUnexpectedException(); |
1075 |
} |
1076 |
} |
1077 |
}); |
1078 |
|
1079 |
Thread t2 = new Thread(new Runnable() { |
1080 |
public void run() { |
1081 |
try { |
1082 |
sync.acquire(1); |
1083 |
c.await(); |
1084 |
sync.release(1); |
1085 |
} |
1086 |
catch (InterruptedException e) { |
1087 |
threadUnexpectedException(); |
1088 |
} |
1089 |
} |
1090 |
}); |
1091 |
|
1092 |
try { |
1093 |
t1.start(); |
1094 |
t2.start(); |
1095 |
Thread.sleep(SHORT_DELAY_MS); |
1096 |
sync.acquire(1); |
1097 |
c.signalAll(); |
1098 |
sync.release(1); |
1099 |
t1.join(SHORT_DELAY_MS); |
1100 |
t2.join(SHORT_DELAY_MS); |
1101 |
assertFalse(t1.isAlive()); |
1102 |
assertFalse(t2.isAlive()); |
1103 |
} |
1104 |
catch (Exception ex) { |
1105 |
unexpectedException(); |
1106 |
} |
1107 |
} |
1108 |
|
1109 |
|
1110 |
/** |
1111 |
* toString indicates current state |
1112 |
*/ |
1113 |
public void testToString() { |
1114 |
Mutex sync = new Mutex(); |
1115 |
String us = sync.toString(); |
1116 |
assertTrue(us.indexOf("State = 0") >= 0); |
1117 |
sync.acquire(1); |
1118 |
String ls = sync.toString(); |
1119 |
assertTrue(ls.indexOf("State = " + Mutex.LOCKED) >= 0); |
1120 |
} |
1121 |
|
1122 |
/** |
1123 |
* A serialized AQS deserializes with current state |
1124 |
*/ |
1125 |
public void testSerialization() { |
1126 |
Mutex l = new Mutex(); |
1127 |
l.acquire(1); |
1128 |
assertTrue(l.isHeldExclusively()); |
1129 |
|
1130 |
try { |
1131 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
1132 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
1133 |
out.writeObject(l); |
1134 |
out.close(); |
1135 |
|
1136 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
1137 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
1138 |
Mutex r = (Mutex) in.readObject(); |
1139 |
assertTrue(r.isHeldExclusively()); |
1140 |
} catch (Exception e){ |
1141 |
e.printStackTrace(); |
1142 |
unexpectedException(); |
1143 |
} |
1144 |
} |
1145 |
|
1146 |
|
1147 |
/** |
1148 |
* tryReleaseShared setting state changes getState |
1149 |
*/ |
1150 |
public void testGetStateWithReleaseShared() { |
1151 |
final BooleanLatch l = new BooleanLatch(); |
1152 |
assertFalse(l.isSignalled()); |
1153 |
l.releaseShared(0); |
1154 |
assertTrue(l.isSignalled()); |
1155 |
} |
1156 |
|
1157 |
/** |
1158 |
* releaseShared has no effect when already signalled |
1159 |
*/ |
1160 |
public void testReleaseShared() { |
1161 |
final BooleanLatch l = new BooleanLatch(); |
1162 |
assertFalse(l.isSignalled()); |
1163 |
l.releaseShared(0); |
1164 |
assertTrue(l.isSignalled()); |
1165 |
l.releaseShared(0); |
1166 |
assertTrue(l.isSignalled()); |
1167 |
} |
1168 |
|
1169 |
/** |
1170 |
* acquireSharedInterruptibly returns after release, but not before |
1171 |
*/ |
1172 |
public void testAcquireSharedInterruptibly() { |
1173 |
final BooleanLatch l = new BooleanLatch(); |
1174 |
|
1175 |
Thread t = new Thread(new Runnable() { |
1176 |
public void run() { |
1177 |
try { |
1178 |
threadAssertFalse(l.isSignalled()); |
1179 |
l.acquireSharedInterruptibly(0); |
1180 |
threadAssertTrue(l.isSignalled()); |
1181 |
} catch (InterruptedException e){ |
1182 |
threadUnexpectedException(); |
1183 |
} |
1184 |
} |
1185 |
}); |
1186 |
try { |
1187 |
t.start(); |
1188 |
assertFalse(l.isSignalled()); |
1189 |
Thread.sleep(SHORT_DELAY_MS); |
1190 |
l.releaseShared(0); |
1191 |
assertTrue(l.isSignalled()); |
1192 |
t.join(); |
1193 |
} catch (InterruptedException e){ |
1194 |
unexpectedException(); |
1195 |
} |
1196 |
} |
1197 |
|
1198 |
|
1199 |
/** |
1200 |
* acquireSharedTimed returns after release |
1201 |
*/ |
1202 |
public void testAsquireSharedTimed() { |
1203 |
final BooleanLatch l = new BooleanLatch(); |
1204 |
|
1205 |
Thread t = new Thread(new Runnable() { |
1206 |
public void run() { |
1207 |
try { |
1208 |
threadAssertFalse(l.isSignalled()); |
1209 |
threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000)); |
1210 |
threadAssertTrue(l.isSignalled()); |
1211 |
|
1212 |
} catch (InterruptedException e){ |
1213 |
threadUnexpectedException(); |
1214 |
} |
1215 |
} |
1216 |
}); |
1217 |
try { |
1218 |
t.start(); |
1219 |
assertFalse(l.isSignalled()); |
1220 |
Thread.sleep(SHORT_DELAY_MS); |
1221 |
l.releaseShared(0); |
1222 |
assertTrue(l.isSignalled()); |
1223 |
t.join(); |
1224 |
} catch (InterruptedException e){ |
1225 |
unexpectedException(); |
1226 |
} |
1227 |
} |
1228 |
|
1229 |
/** |
1230 |
* acquireSharedInterruptibly throws IE if interrupted before released |
1231 |
*/ |
1232 |
public void testAcquireSharedInterruptibly_InterruptedException() { |
1233 |
final BooleanLatch l = new BooleanLatch(); |
1234 |
Thread t = new Thread(new Runnable() { |
1235 |
public void run() { |
1236 |
try { |
1237 |
threadAssertFalse(l.isSignalled()); |
1238 |
l.acquireSharedInterruptibly(0); |
1239 |
threadShouldThrow(); |
1240 |
} catch (InterruptedException success){} |
1241 |
} |
1242 |
}); |
1243 |
t.start(); |
1244 |
try { |
1245 |
assertFalse(l.isSignalled()); |
1246 |
t.interrupt(); |
1247 |
t.join(); |
1248 |
} catch (InterruptedException e){ |
1249 |
unexpectedException(); |
1250 |
} |
1251 |
} |
1252 |
|
1253 |
/** |
1254 |
* acquireSharedTimed throws IE if interrupted before released |
1255 |
*/ |
1256 |
public void testAcquireSharedNanos_InterruptedException() { |
1257 |
final BooleanLatch l = new BooleanLatch(); |
1258 |
Thread t = new Thread(new Runnable() { |
1259 |
public void run() { |
1260 |
try { |
1261 |
threadAssertFalse(l.isSignalled()); |
1262 |
l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000); |
1263 |
threadShouldThrow(); |
1264 |
} catch (InterruptedException success){} |
1265 |
} |
1266 |
}); |
1267 |
t.start(); |
1268 |
try { |
1269 |
Thread.sleep(SHORT_DELAY_MS); |
1270 |
assertFalse(l.isSignalled()); |
1271 |
t.interrupt(); |
1272 |
t.join(); |
1273 |
} catch (InterruptedException e){ |
1274 |
unexpectedException(); |
1275 |
} |
1276 |
} |
1277 |
|
1278 |
/** |
1279 |
* acquireSharedTimed times out if not released before timeout |
1280 |
*/ |
1281 |
public void testAcquireSharedNanos_Timeout() { |
1282 |
final BooleanLatch l = new BooleanLatch(); |
1283 |
Thread t = new Thread(new Runnable() { |
1284 |
public void run() { |
1285 |
try { |
1286 |
threadAssertFalse(l.isSignalled()); |
1287 |
threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000)); |
1288 |
} catch (InterruptedException ie){ |
1289 |
threadUnexpectedException(); |
1290 |
} |
1291 |
} |
1292 |
}); |
1293 |
t.start(); |
1294 |
try { |
1295 |
Thread.sleep(SHORT_DELAY_MS); |
1296 |
assertFalse(l.isSignalled()); |
1297 |
t.join(); |
1298 |
} catch (InterruptedException e){ |
1299 |
unexpectedException(); |
1300 |
} |
1301 |
} |
1302 |
|
1303 |
|
1304 |
} |