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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 static java.util.concurrent.TimeUnit.MILLISECONDS; |
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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 that does not expect to |
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* be interrupted. |
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*/ |
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class InterruptibleSyncRunnable extends CheckedRunnable { |
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final Mutex sync; |
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InterruptibleSyncRunnable(Mutex l) { sync = l; } |
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public void realRun() throws InterruptedException { |
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sync.acquireInterruptibly(1); |
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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 extends CheckedInterruptedRunnable { |
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final Mutex sync; |
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InterruptedSyncRunnable(Mutex l) { sync = l; } |
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public void realRun() throws InterruptedException { |
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sync.acquireInterruptibly(1); |
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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 |
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*/ |
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public void testhasQueuedThreads() throws InterruptedException { |
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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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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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} |
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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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* isQueued reports whether a thread is queued. |
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*/ |
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public void testIsQueued() throws InterruptedException { |
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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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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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} |
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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() throws InterruptedException { |
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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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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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} |
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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() throws InterruptedException { |
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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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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); |
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assertTrue(sync.hasContended()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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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()); |
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t1.join(); |
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t2.join(); |
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} |
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|
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/** |
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* getQueuedThreads includes waiting threads |
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*/ |
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public void testGetQueuedThreads() throws InterruptedException { |
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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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assertTrue(sync.getQueuedThreads().isEmpty()); |
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sync.acquire(1); |
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assertTrue(sync.getQueuedThreads().isEmpty()); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getQueuedThreads().contains(t1)); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getQueuedThreads().contains(t1)); |
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assertTrue(sync.getQueuedThreads().contains(t2)); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.getQueuedThreads().contains(t1)); |
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assertTrue(sync.getQueuedThreads().contains(t2)); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getQueuedThreads().isEmpty()); |
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t1.join(); |
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t2.join(); |
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} |
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|
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/** |
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* getExclusiveQueuedThreads includes waiting threads |
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*/ |
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public void testGetExclusiveQueuedThreads() throws InterruptedException { |
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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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assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
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sync.acquire(1); |
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assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
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assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.getExclusiveQueuedThreads().contains(t1)); |
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assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
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t1.join(); |
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t2.join(); |
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} |
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|
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/** |
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* getSharedQueuedThreads does not include exclusively waiting threads |
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*/ |
302 |
public void testGetSharedQueuedThreads() throws InterruptedException { |
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final Mutex sync = new Mutex(); |
304 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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sync.acquire(1); |
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assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
311 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
314 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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t1.interrupt(); |
316 |
Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
318 |
sync.release(1); |
319 |
Thread.sleep(SHORT_DELAY_MS); |
320 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
321 |
t1.join(); |
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t2.join(); |
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} |
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|
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/** |
326 |
* tryAcquireNanos is interruptible. |
327 |
*/ |
328 |
public void testInterruptedException2() throws InterruptedException { |
329 |
final Mutex sync = new Mutex(); |
330 |
sync.acquire(1); |
331 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
332 |
public void realRun() throws InterruptedException { |
333 |
sync.tryAcquireNanos(1, MEDIUM_DELAY_MS * 1000L * 1000L); |
334 |
}}); |
335 |
|
336 |
t.start(); |
337 |
Thread.sleep(SHORT_DELAY_MS); |
338 |
t.interrupt(); |
339 |
t.join(); |
340 |
} |
341 |
|
342 |
|
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/** |
344 |
* TryAcquire on exclusively held sync fails |
345 |
*/ |
346 |
public void testTryAcquireWhenSynced() throws InterruptedException { |
347 |
final Mutex sync = new Mutex(); |
348 |
sync.acquire(1); |
349 |
Thread t = new Thread(new CheckedRunnable() { |
350 |
public void realRun() { |
351 |
threadAssertFalse(sync.tryAcquire(1)); |
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}}); |
353 |
|
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t.start(); |
355 |
t.join(); |
356 |
sync.release(1); |
357 |
} |
358 |
|
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/** |
360 |
* tryAcquireNanos on an exclusively held sync times out |
361 |
*/ |
362 |
public void testAcquireNanos_Timeout() throws InterruptedException { |
363 |
final Mutex sync = new Mutex(); |
364 |
sync.acquire(1); |
365 |
Thread t = new Thread(new CheckedRunnable() { |
366 |
public void realRun() throws InterruptedException { |
367 |
threadAssertFalse(sync.tryAcquireNanos(1, SHORT_DELAY_MS * 1000L * 1000L)); |
368 |
}}); |
369 |
|
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t.start(); |
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t.join(); |
372 |
sync.release(1); |
373 |
} |
374 |
|
375 |
|
376 |
/** |
377 |
* getState is true when acquired and false when not |
378 |
*/ |
379 |
public void testGetState() throws InterruptedException { |
380 |
final Mutex sync = new Mutex(); |
381 |
sync.acquire(1); |
382 |
assertTrue(sync.isHeldExclusively()); |
383 |
sync.release(1); |
384 |
assertFalse(sync.isHeldExclusively()); |
385 |
Thread t = new Thread(new CheckedRunnable() { |
386 |
public void realRun() throws InterruptedException { |
387 |
sync.acquire(1); |
388 |
Thread.sleep(SMALL_DELAY_MS); |
389 |
sync.release(1); |
390 |
}}); |
391 |
|
392 |
t.start(); |
393 |
Thread.sleep(SHORT_DELAY_MS); |
394 |
assertTrue(sync.isHeldExclusively()); |
395 |
t.join(); |
396 |
assertFalse(sync.isHeldExclusively()); |
397 |
} |
398 |
|
399 |
|
400 |
/** |
401 |
* acquireInterruptibly is interruptible. |
402 |
*/ |
403 |
public void testAcquireInterruptibly1() throws InterruptedException { |
404 |
final Mutex sync = new Mutex(); |
405 |
sync.acquire(1); |
406 |
Thread t = new Thread(new InterruptedSyncRunnable(sync)); |
407 |
t.start(); |
408 |
Thread.sleep(SHORT_DELAY_MS); |
409 |
t.interrupt(); |
410 |
Thread.sleep(SHORT_DELAY_MS); |
411 |
sync.release(1); |
412 |
t.join(); |
413 |
} |
414 |
|
415 |
/** |
416 |
* acquireInterruptibly succeeds when released, else is interruptible |
417 |
*/ |
418 |
public void testAcquireInterruptibly2() throws InterruptedException { |
419 |
final Mutex sync = new Mutex(); |
420 |
sync.acquireInterruptibly(1); |
421 |
Thread t = new Thread(new InterruptedSyncRunnable(sync)); |
422 |
t.start(); |
423 |
Thread.sleep(SHORT_DELAY_MS); |
424 |
t.interrupt(); |
425 |
assertTrue(sync.isHeldExclusively()); |
426 |
t.join(); |
427 |
} |
428 |
|
429 |
/** |
430 |
* owns is true for a condition created by sync else false |
431 |
*/ |
432 |
public void testOwns() { |
433 |
final Mutex sync = new Mutex(); |
434 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
435 |
final Mutex sync2 = new Mutex(); |
436 |
assertTrue(sync.owns(c)); |
437 |
assertFalse(sync2.owns(c)); |
438 |
} |
439 |
|
440 |
/** |
441 |
* Calling await without holding sync throws IllegalMonitorStateException |
442 |
*/ |
443 |
public void testAwait_IllegalMonitor() throws InterruptedException { |
444 |
final Mutex sync = new Mutex(); |
445 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
446 |
try { |
447 |
c.await(); |
448 |
shouldThrow(); |
449 |
} catch (IllegalMonitorStateException success) {} |
450 |
} |
451 |
|
452 |
/** |
453 |
* Calling signal without holding sync throws IllegalMonitorStateException |
454 |
*/ |
455 |
public void testSignal_IllegalMonitor() throws InterruptedException { |
456 |
final Mutex sync = new Mutex(); |
457 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
458 |
try { |
459 |
c.signal(); |
460 |
shouldThrow(); |
461 |
} catch (IllegalMonitorStateException success) {} |
462 |
} |
463 |
|
464 |
/** |
465 |
* awaitNanos without a signal times out |
466 |
*/ |
467 |
public void testAwaitNanos_Timeout() throws InterruptedException { |
468 |
final Mutex sync = new Mutex(); |
469 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
470 |
sync.acquire(1); |
471 |
long t = c.awaitNanos(100); |
472 |
assertTrue(t <= 0); |
473 |
sync.release(1); |
474 |
} |
475 |
|
476 |
/** |
477 |
* Timed await without a signal times out |
478 |
*/ |
479 |
public void testAwait_Timeout() throws InterruptedException { |
480 |
final Mutex sync = new Mutex(); |
481 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
482 |
sync.acquire(1); |
483 |
assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS)); |
484 |
sync.release(1); |
485 |
} |
486 |
|
487 |
/** |
488 |
* awaitUntil without a signal times out |
489 |
*/ |
490 |
public void testAwaitUntil_Timeout() throws InterruptedException { |
491 |
final Mutex sync = new Mutex(); |
492 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
493 |
sync.acquire(1); |
494 |
java.util.Date d = new java.util.Date(); |
495 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
496 |
sync.release(1); |
497 |
} |
498 |
|
499 |
/** |
500 |
* await returns when signalled |
501 |
*/ |
502 |
public void testAwait() throws InterruptedException { |
503 |
final Mutex sync = new Mutex(); |
504 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
505 |
Thread t = new Thread(new CheckedRunnable() { |
506 |
public void realRun() throws InterruptedException { |
507 |
sync.acquire(1); |
508 |
c.await(); |
509 |
sync.release(1); |
510 |
}}); |
511 |
|
512 |
t.start(); |
513 |
Thread.sleep(SHORT_DELAY_MS); |
514 |
sync.acquire(1); |
515 |
c.signal(); |
516 |
sync.release(1); |
517 |
t.join(SHORT_DELAY_MS); |
518 |
assertFalse(t.isAlive()); |
519 |
} |
520 |
|
521 |
|
522 |
|
523 |
/** |
524 |
* hasWaiters throws NPE if null |
525 |
*/ |
526 |
public void testHasWaitersNPE() { |
527 |
final Mutex sync = new Mutex(); |
528 |
try { |
529 |
sync.hasWaiters(null); |
530 |
shouldThrow(); |
531 |
} catch (NullPointerException success) {} |
532 |
} |
533 |
|
534 |
/** |
535 |
* getWaitQueueLength throws NPE if null |
536 |
*/ |
537 |
public void testGetWaitQueueLengthNPE() { |
538 |
final Mutex sync = new Mutex(); |
539 |
try { |
540 |
sync.getWaitQueueLength(null); |
541 |
shouldThrow(); |
542 |
} catch (NullPointerException success) {} |
543 |
} |
544 |
|
545 |
|
546 |
/** |
547 |
* getWaitingThreads throws NPE if null |
548 |
*/ |
549 |
public void testGetWaitingThreadsNPE() { |
550 |
final Mutex sync = new Mutex(); |
551 |
try { |
552 |
sync.getWaitingThreads(null); |
553 |
shouldThrow(); |
554 |
} catch (NullPointerException success) {} |
555 |
} |
556 |
|
557 |
|
558 |
/** |
559 |
* hasWaiters throws IAE if not owned |
560 |
*/ |
561 |
public void testHasWaitersIAE() { |
562 |
final Mutex sync = new Mutex(); |
563 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
564 |
final Mutex sync2 = new Mutex(); |
565 |
try { |
566 |
sync2.hasWaiters(c); |
567 |
shouldThrow(); |
568 |
} catch (IllegalArgumentException success) {} |
569 |
} |
570 |
|
571 |
/** |
572 |
* hasWaiters throws IMSE if not synced |
573 |
*/ |
574 |
public void testHasWaitersIMSE() { |
575 |
final Mutex sync = new Mutex(); |
576 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
577 |
try { |
578 |
sync.hasWaiters(c); |
579 |
shouldThrow(); |
580 |
} catch (IllegalMonitorStateException success) {} |
581 |
} |
582 |
|
583 |
|
584 |
/** |
585 |
* getWaitQueueLength throws IAE if not owned |
586 |
*/ |
587 |
public void testGetWaitQueueLengthIAE() { |
588 |
final Mutex sync = new Mutex(); |
589 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
590 |
final Mutex sync2 = new Mutex(); |
591 |
try { |
592 |
sync2.getWaitQueueLength(c); |
593 |
shouldThrow(); |
594 |
} catch (IllegalArgumentException success) {} |
595 |
} |
596 |
|
597 |
/** |
598 |
* getWaitQueueLength throws IMSE if not synced |
599 |
*/ |
600 |
public void testGetWaitQueueLengthIMSE() { |
601 |
final Mutex sync = new Mutex(); |
602 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
603 |
try { |
604 |
sync.getWaitQueueLength(c); |
605 |
shouldThrow(); |
606 |
} catch (IllegalMonitorStateException success) {} |
607 |
} |
608 |
|
609 |
|
610 |
/** |
611 |
* getWaitingThreads throws IAE if not owned |
612 |
*/ |
613 |
public void testGetWaitingThreadsIAE() { |
614 |
final Mutex sync = new Mutex(); |
615 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
616 |
final Mutex sync2 = new Mutex(); |
617 |
try { |
618 |
sync2.getWaitingThreads(c); |
619 |
shouldThrow(); |
620 |
} catch (IllegalArgumentException success) {} |
621 |
} |
622 |
|
623 |
/** |
624 |
* getWaitingThreads throws IMSE if not synced |
625 |
*/ |
626 |
public void testGetWaitingThreadsIMSE() { |
627 |
final Mutex sync = new Mutex(); |
628 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
629 |
try { |
630 |
sync.getWaitingThreads(c); |
631 |
shouldThrow(); |
632 |
} catch (IllegalMonitorStateException success) {} |
633 |
} |
634 |
|
635 |
|
636 |
|
637 |
/** |
638 |
* hasWaiters returns true when a thread is waiting, else false |
639 |
*/ |
640 |
public void testHasWaiters() throws InterruptedException { |
641 |
final Mutex sync = new Mutex(); |
642 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
643 |
Thread t = new Thread(new CheckedRunnable() { |
644 |
public void realRun() throws InterruptedException { |
645 |
sync.acquire(1); |
646 |
threadAssertFalse(sync.hasWaiters(c)); |
647 |
threadAssertEquals(0, sync.getWaitQueueLength(c)); |
648 |
c.await(); |
649 |
sync.release(1); |
650 |
}}); |
651 |
|
652 |
t.start(); |
653 |
Thread.sleep(SHORT_DELAY_MS); |
654 |
sync.acquire(1); |
655 |
assertTrue(sync.hasWaiters(c)); |
656 |
assertEquals(1, sync.getWaitQueueLength(c)); |
657 |
c.signal(); |
658 |
sync.release(1); |
659 |
Thread.sleep(SHORT_DELAY_MS); |
660 |
sync.acquire(1); |
661 |
assertFalse(sync.hasWaiters(c)); |
662 |
assertEquals(0, sync.getWaitQueueLength(c)); |
663 |
sync.release(1); |
664 |
t.join(SHORT_DELAY_MS); |
665 |
assertFalse(t.isAlive()); |
666 |
} |
667 |
|
668 |
/** |
669 |
* getWaitQueueLength returns number of waiting threads |
670 |
*/ |
671 |
public void testGetWaitQueueLength() throws InterruptedException { |
672 |
final Mutex sync = new Mutex(); |
673 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
674 |
Thread t1 = new Thread(new CheckedRunnable() { |
675 |
public void realRun() throws InterruptedException { |
676 |
sync.acquire(1); |
677 |
threadAssertFalse(sync.hasWaiters(c)); |
678 |
threadAssertEquals(0, sync.getWaitQueueLength(c)); |
679 |
c.await(); |
680 |
sync.release(1); |
681 |
}}); |
682 |
|
683 |
Thread t2 = new Thread(new CheckedRunnable() { |
684 |
public void realRun() throws InterruptedException { |
685 |
sync.acquire(1); |
686 |
threadAssertTrue(sync.hasWaiters(c)); |
687 |
threadAssertEquals(1, sync.getWaitQueueLength(c)); |
688 |
c.await(); |
689 |
sync.release(1); |
690 |
}}); |
691 |
|
692 |
t1.start(); |
693 |
Thread.sleep(SHORT_DELAY_MS); |
694 |
t2.start(); |
695 |
Thread.sleep(SHORT_DELAY_MS); |
696 |
sync.acquire(1); |
697 |
assertTrue(sync.hasWaiters(c)); |
698 |
assertEquals(2, sync.getWaitQueueLength(c)); |
699 |
c.signalAll(); |
700 |
sync.release(1); |
701 |
Thread.sleep(SHORT_DELAY_MS); |
702 |
sync.acquire(1); |
703 |
assertFalse(sync.hasWaiters(c)); |
704 |
assertEquals(0, sync.getWaitQueueLength(c)); |
705 |
sync.release(1); |
706 |
t1.join(SHORT_DELAY_MS); |
707 |
t2.join(SHORT_DELAY_MS); |
708 |
assertFalse(t1.isAlive()); |
709 |
assertFalse(t2.isAlive()); |
710 |
} |
711 |
|
712 |
/** |
713 |
* getWaitingThreads returns only and all waiting threads |
714 |
*/ |
715 |
public void testGetWaitingThreads() throws InterruptedException { |
716 |
final Mutex sync = new Mutex(); |
717 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
718 |
Thread t1 = new Thread(new CheckedRunnable() { |
719 |
public void realRun() throws InterruptedException { |
720 |
sync.acquire(1); |
721 |
threadAssertTrue(sync.getWaitingThreads(c).isEmpty()); |
722 |
c.await(); |
723 |
sync.release(1); |
724 |
}}); |
725 |
|
726 |
Thread t2 = new Thread(new CheckedRunnable() { |
727 |
public void realRun() throws InterruptedException { |
728 |
sync.acquire(1); |
729 |
threadAssertFalse(sync.getWaitingThreads(c).isEmpty()); |
730 |
c.await(); |
731 |
sync.release(1); |
732 |
}}); |
733 |
|
734 |
sync.acquire(1); |
735 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
736 |
sync.release(1); |
737 |
t1.start(); |
738 |
Thread.sleep(SHORT_DELAY_MS); |
739 |
t2.start(); |
740 |
Thread.sleep(SHORT_DELAY_MS); |
741 |
sync.acquire(1); |
742 |
assertTrue(sync.hasWaiters(c)); |
743 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
744 |
assertTrue(sync.getWaitingThreads(c).contains(t2)); |
745 |
c.signalAll(); |
746 |
sync.release(1); |
747 |
Thread.sleep(SHORT_DELAY_MS); |
748 |
sync.acquire(1); |
749 |
assertFalse(sync.hasWaiters(c)); |
750 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
751 |
sync.release(1); |
752 |
t1.join(SHORT_DELAY_MS); |
753 |
t2.join(SHORT_DELAY_MS); |
754 |
assertFalse(t1.isAlive()); |
755 |
assertFalse(t2.isAlive()); |
756 |
} |
757 |
|
758 |
|
759 |
|
760 |
/** |
761 |
* awaitUninterruptibly doesn't abort on interrupt |
762 |
*/ |
763 |
public void testAwaitUninterruptibly() throws InterruptedException { |
764 |
final Mutex sync = new Mutex(); |
765 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
766 |
Thread t = new Thread(new CheckedRunnable() { |
767 |
public void realRun() { |
768 |
sync.acquire(1); |
769 |
c.awaitUninterruptibly(); |
770 |
sync.release(1); |
771 |
}}); |
772 |
|
773 |
t.start(); |
774 |
Thread.sleep(SHORT_DELAY_MS); |
775 |
t.interrupt(); |
776 |
sync.acquire(1); |
777 |
c.signal(); |
778 |
sync.release(1); |
779 |
t.join(SHORT_DELAY_MS); |
780 |
assertFalse(t.isAlive()); |
781 |
} |
782 |
|
783 |
/** |
784 |
* await is interruptible |
785 |
*/ |
786 |
public void testAwait_Interrupt() throws InterruptedException { |
787 |
final Mutex sync = new Mutex(); |
788 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
789 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
790 |
public void realRun() throws InterruptedException { |
791 |
sync.acquire(1); |
792 |
c.await(); |
793 |
}}); |
794 |
|
795 |
t.start(); |
796 |
Thread.sleep(SHORT_DELAY_MS); |
797 |
t.interrupt(); |
798 |
t.join(SHORT_DELAY_MS); |
799 |
assertFalse(t.isAlive()); |
800 |
} |
801 |
|
802 |
/** |
803 |
* awaitNanos is interruptible |
804 |
*/ |
805 |
public void testAwaitNanos_Interrupt() throws InterruptedException { |
806 |
final Mutex sync = new Mutex(); |
807 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
808 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
809 |
public void realRun() throws InterruptedException { |
810 |
sync.acquire(1); |
811 |
c.awaitNanos(LONG_DELAY_MS * 1000L * 1000L); |
812 |
}}); |
813 |
|
814 |
t.start(); |
815 |
Thread.sleep(SHORT_DELAY_MS); |
816 |
t.interrupt(); |
817 |
t.join(SHORT_DELAY_MS); |
818 |
assertFalse(t.isAlive()); |
819 |
} |
820 |
|
821 |
/** |
822 |
* awaitUntil is interruptible |
823 |
*/ |
824 |
public void testAwaitUntil_Interrupt() throws InterruptedException { |
825 |
final Mutex sync = new Mutex(); |
826 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
827 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
828 |
public void realRun() throws InterruptedException { |
829 |
sync.acquire(1); |
830 |
java.util.Date d = new java.util.Date(); |
831 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
832 |
}}); |
833 |
|
834 |
t.start(); |
835 |
Thread.sleep(SHORT_DELAY_MS); |
836 |
t.interrupt(); |
837 |
t.join(SHORT_DELAY_MS); |
838 |
assertFalse(t.isAlive()); |
839 |
} |
840 |
|
841 |
/** |
842 |
* signalAll wakes up all threads |
843 |
*/ |
844 |
public void testSignalAll() throws InterruptedException { |
845 |
final Mutex sync = new Mutex(); |
846 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
847 |
Thread t1 = new Thread(new CheckedRunnable() { |
848 |
public void realRun() throws InterruptedException { |
849 |
sync.acquire(1); |
850 |
c.await(); |
851 |
sync.release(1); |
852 |
}}); |
853 |
|
854 |
Thread t2 = new Thread(new CheckedRunnable() { |
855 |
public void realRun() throws InterruptedException { |
856 |
sync.acquire(1); |
857 |
c.await(); |
858 |
sync.release(1); |
859 |
}}); |
860 |
|
861 |
t1.start(); |
862 |
t2.start(); |
863 |
Thread.sleep(SHORT_DELAY_MS); |
864 |
sync.acquire(1); |
865 |
c.signalAll(); |
866 |
sync.release(1); |
867 |
t1.join(SHORT_DELAY_MS); |
868 |
t2.join(SHORT_DELAY_MS); |
869 |
assertFalse(t1.isAlive()); |
870 |
assertFalse(t2.isAlive()); |
871 |
} |
872 |
|
873 |
|
874 |
/** |
875 |
* toString indicates current state |
876 |
*/ |
877 |
public void testToString() { |
878 |
Mutex sync = new Mutex(); |
879 |
String us = sync.toString(); |
880 |
assertTrue(us.indexOf("State = 0") >= 0); |
881 |
sync.acquire(1); |
882 |
String ls = sync.toString(); |
883 |
assertTrue(ls.indexOf("State = " + Mutex.LOCKED) >= 0); |
884 |
} |
885 |
|
886 |
/** |
887 |
* A serialized AQS deserializes with current state |
888 |
*/ |
889 |
public void testSerialization() throws Exception { |
890 |
Mutex l = new Mutex(); |
891 |
l.acquire(1); |
892 |
assertTrue(l.isHeldExclusively()); |
893 |
|
894 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
895 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
896 |
out.writeObject(l); |
897 |
out.close(); |
898 |
|
899 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
900 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
901 |
Mutex r = (Mutex) in.readObject(); |
902 |
assertTrue(r.isHeldExclusively()); |
903 |
} |
904 |
|
905 |
|
906 |
/** |
907 |
* tryReleaseShared setting state changes getState |
908 |
*/ |
909 |
public void testGetStateWithReleaseShared() { |
910 |
final BooleanLatch l = new BooleanLatch(); |
911 |
assertFalse(l.isSignalled()); |
912 |
l.releaseShared(0); |
913 |
assertTrue(l.isSignalled()); |
914 |
} |
915 |
|
916 |
/** |
917 |
* releaseShared has no effect when already signalled |
918 |
*/ |
919 |
public void testReleaseShared() { |
920 |
final BooleanLatch l = new BooleanLatch(); |
921 |
assertFalse(l.isSignalled()); |
922 |
l.releaseShared(0); |
923 |
assertTrue(l.isSignalled()); |
924 |
l.releaseShared(0); |
925 |
assertTrue(l.isSignalled()); |
926 |
} |
927 |
|
928 |
/** |
929 |
* acquireSharedInterruptibly returns after release, but not before |
930 |
*/ |
931 |
public void testAcquireSharedInterruptibly() throws InterruptedException { |
932 |
final BooleanLatch l = new BooleanLatch(); |
933 |
|
934 |
Thread t = new Thread(new CheckedRunnable() { |
935 |
public void realRun() throws InterruptedException { |
936 |
threadAssertFalse(l.isSignalled()); |
937 |
l.acquireSharedInterruptibly(0); |
938 |
threadAssertTrue(l.isSignalled()); |
939 |
}}); |
940 |
|
941 |
t.start(); |
942 |
assertFalse(l.isSignalled()); |
943 |
Thread.sleep(SHORT_DELAY_MS); |
944 |
l.releaseShared(0); |
945 |
assertTrue(l.isSignalled()); |
946 |
t.join(); |
947 |
} |
948 |
|
949 |
|
950 |
/** |
951 |
* acquireSharedTimed returns after release |
952 |
*/ |
953 |
public void testAsquireSharedTimed() throws InterruptedException { |
954 |
final BooleanLatch l = new BooleanLatch(); |
955 |
|
956 |
Thread t = new Thread(new CheckedRunnable() { |
957 |
public void realRun() throws InterruptedException { |
958 |
threadAssertFalse(l.isSignalled()); |
959 |
threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS * 1000L * 1000L)); |
960 |
threadAssertTrue(l.isSignalled()); |
961 |
}}); |
962 |
|
963 |
t.start(); |
964 |
assertFalse(l.isSignalled()); |
965 |
Thread.sleep(SHORT_DELAY_MS); |
966 |
l.releaseShared(0); |
967 |
assertTrue(l.isSignalled()); |
968 |
t.join(); |
969 |
} |
970 |
|
971 |
/** |
972 |
* acquireSharedInterruptibly throws IE if interrupted before released |
973 |
*/ |
974 |
public void testAcquireSharedInterruptibly_InterruptedException() throws InterruptedException { |
975 |
final BooleanLatch l = new BooleanLatch(); |
976 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
977 |
public void realRun() throws InterruptedException { |
978 |
threadAssertFalse(l.isSignalled()); |
979 |
l.acquireSharedInterruptibly(0); |
980 |
}}); |
981 |
|
982 |
t.start(); |
983 |
assertFalse(l.isSignalled()); |
984 |
t.interrupt(); |
985 |
t.join(); |
986 |
} |
987 |
|
988 |
/** |
989 |
* acquireSharedTimed throws IE if interrupted before released |
990 |
*/ |
991 |
public void testAcquireSharedNanos_InterruptedException() throws InterruptedException { |
992 |
final BooleanLatch l = new BooleanLatch(); |
993 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
994 |
public void realRun() throws InterruptedException { |
995 |
threadAssertFalse(l.isSignalled()); |
996 |
l.tryAcquireSharedNanos(0, SMALL_DELAY_MS * 1000L * 1000L); |
997 |
}}); |
998 |
|
999 |
t.start(); |
1000 |
Thread.sleep(SHORT_DELAY_MS); |
1001 |
assertFalse(l.isSignalled()); |
1002 |
t.interrupt(); |
1003 |
t.join(); |
1004 |
} |
1005 |
|
1006 |
/** |
1007 |
* acquireSharedTimed times out if not released before timeout |
1008 |
*/ |
1009 |
public void testAcquireSharedNanos_Timeout() throws InterruptedException { |
1010 |
final BooleanLatch l = new BooleanLatch(); |
1011 |
Thread t = new Thread(new CheckedRunnable() { |
1012 |
public void realRun() throws InterruptedException { |
1013 |
threadAssertFalse(l.isSignalled()); |
1014 |
threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS * 1000L * 1000L)); |
1015 |
}}); |
1016 |
|
1017 |
t.start(); |
1018 |
Thread.sleep(SHORT_DELAY_MS); |
1019 |
assertFalse(l.isSignalled()); |
1020 |
t.join(); |
1021 |
} |
1022 |
|
1023 |
} |