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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 |
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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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*/ |
277 |
public void testGetExclusiveQueuedThreads() throws InterruptedException { |
278 |
final Mutex sync = new Mutex(); |
279 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
281 |
assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
282 |
sync.acquire(1); |
283 |
assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
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t1.start(); |
285 |
Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
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t2.start(); |
288 |
Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
290 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
291 |
t1.interrupt(); |
292 |
Thread.sleep(SHORT_DELAY_MS); |
293 |
assertFalse(sync.getExclusiveQueuedThreads().contains(t1)); |
294 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
295 |
sync.release(1); |
296 |
Thread.sleep(SHORT_DELAY_MS); |
297 |
assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
298 |
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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*/ |
305 |
public void testGetSharedQueuedThreads() throws InterruptedException { |
306 |
final Mutex sync = new Mutex(); |
307 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
308 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
309 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
310 |
sync.acquire(1); |
311 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
312 |
t1.start(); |
313 |
Thread.sleep(SHORT_DELAY_MS); |
314 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
315 |
t2.start(); |
316 |
Thread.sleep(SHORT_DELAY_MS); |
317 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
318 |
t1.interrupt(); |
319 |
Thread.sleep(SHORT_DELAY_MS); |
320 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
321 |
sync.release(1); |
322 |
Thread.sleep(SHORT_DELAY_MS); |
323 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
324 |
t1.join(); |
325 |
t2.join(); |
326 |
} |
327 |
|
328 |
/** |
329 |
* tryAcquireNanos is interruptible. |
330 |
*/ |
331 |
public void testInterruptedException2() throws InterruptedException { |
332 |
final Mutex sync = new Mutex(); |
333 |
sync.acquire(1); |
334 |
Thread t = new Thread(new Runnable() { |
335 |
public void run() { |
336 |
try { |
337 |
sync.tryAcquireNanos(1, MEDIUM_DELAY_MS * 1000 * 1000); |
338 |
threadShouldThrow(); |
339 |
} catch (InterruptedException success) {} |
340 |
} |
341 |
}); |
342 |
|
343 |
t.start(); |
344 |
t.interrupt(); |
345 |
t.join(); |
346 |
} |
347 |
|
348 |
|
349 |
/** |
350 |
* TryAcquire on exclusively held sync fails |
351 |
*/ |
352 |
public void testTryAcquireWhenSynced() throws InterruptedException { |
353 |
final Mutex sync = new Mutex(); |
354 |
sync.acquire(1); |
355 |
Thread t = new Thread(new Runnable() { |
356 |
public void run() { |
357 |
threadAssertFalse(sync.tryAcquire(1)); |
358 |
} |
359 |
}); |
360 |
|
361 |
t.start(); |
362 |
t.join(); |
363 |
sync.release(1); |
364 |
} |
365 |
|
366 |
/** |
367 |
* tryAcquireNanos on an exclusively held sync times out |
368 |
*/ |
369 |
public void testAcquireNanos_Timeout() throws InterruptedException { |
370 |
final Mutex sync = new Mutex(); |
371 |
sync.acquire(1); |
372 |
Thread t = new Thread(new Runnable() { |
373 |
public void run() { |
374 |
try { |
375 |
threadAssertFalse(sync.tryAcquireNanos(1, 1000 * 1000)); |
376 |
} catch (Exception ex) { |
377 |
threadUnexpectedException(ex); |
378 |
} |
379 |
} |
380 |
}); |
381 |
|
382 |
t.start(); |
383 |
t.join(); |
384 |
sync.release(1); |
385 |
} |
386 |
|
387 |
|
388 |
/** |
389 |
* getState is true when acquired and false when not |
390 |
*/ |
391 |
public void testGetState() throws InterruptedException { |
392 |
final Mutex sync = new Mutex(); |
393 |
sync.acquire(1); |
394 |
assertTrue(sync.isHeldExclusively()); |
395 |
sync.release(1); |
396 |
assertFalse(sync.isHeldExclusively()); |
397 |
Thread t = new Thread(new Runnable() { |
398 |
public void run() { |
399 |
sync.acquire(1); |
400 |
try { |
401 |
Thread.sleep(SMALL_DELAY_MS); |
402 |
} |
403 |
catch (Exception e) { |
404 |
threadUnexpectedException(e); |
405 |
} |
406 |
sync.release(1); |
407 |
} |
408 |
}); |
409 |
|
410 |
t.start(); |
411 |
Thread.sleep(SHORT_DELAY_MS); |
412 |
assertTrue(sync.isHeldExclusively()); |
413 |
t.join(); |
414 |
assertFalse(sync.isHeldExclusively()); |
415 |
} |
416 |
|
417 |
|
418 |
/** |
419 |
* acquireInterruptibly is interruptible. |
420 |
*/ |
421 |
public void testAcquireInterruptibly1() throws InterruptedException { |
422 |
final Mutex sync = new Mutex(); |
423 |
sync.acquire(1); |
424 |
Thread t = new Thread(new InterruptedSyncRunnable(sync)); |
425 |
t.start(); |
426 |
Thread.sleep(SHORT_DELAY_MS); |
427 |
t.interrupt(); |
428 |
Thread.sleep(SHORT_DELAY_MS); |
429 |
sync.release(1); |
430 |
t.join(); |
431 |
} |
432 |
|
433 |
/** |
434 |
* acquireInterruptibly succeeds when released, else is interruptible |
435 |
*/ |
436 |
public void testAcquireInterruptibly2() throws InterruptedException { |
437 |
final Mutex sync = new Mutex(); |
438 |
sync.acquireInterruptibly(1); |
439 |
Thread t = new Thread(new InterruptedSyncRunnable(sync)); |
440 |
t.start(); |
441 |
t.interrupt(); |
442 |
assertTrue(sync.isHeldExclusively()); |
443 |
t.join(); |
444 |
} |
445 |
|
446 |
/** |
447 |
* owns is true for a condition created by sync else false |
448 |
*/ |
449 |
public void testOwns() { |
450 |
final Mutex sync = new Mutex(); |
451 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
452 |
final Mutex sync2 = new Mutex(); |
453 |
assertTrue(sync.owns(c)); |
454 |
assertFalse(sync2.owns(c)); |
455 |
} |
456 |
|
457 |
/** |
458 |
* Calling await without holding sync throws IllegalMonitorStateException |
459 |
*/ |
460 |
public void testAwait_IllegalMonitor() throws InterruptedException { |
461 |
final Mutex sync = new Mutex(); |
462 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
463 |
try { |
464 |
c.await(); |
465 |
shouldThrow(); |
466 |
} |
467 |
catch (IllegalMonitorStateException success) { |
468 |
} |
469 |
} |
470 |
|
471 |
/** |
472 |
* Calling signal without holding sync throws IllegalMonitorStateException |
473 |
*/ |
474 |
public void testSignal_IllegalMonitor() throws InterruptedException { |
475 |
final Mutex sync = new Mutex(); |
476 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
477 |
try { |
478 |
c.signal(); |
479 |
shouldThrow(); |
480 |
} |
481 |
catch (IllegalMonitorStateException success) {} |
482 |
} |
483 |
|
484 |
/** |
485 |
* awaitNanos without a signal times out |
486 |
*/ |
487 |
public void testAwaitNanos_Timeout() throws InterruptedException { |
488 |
final Mutex sync = new Mutex(); |
489 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
490 |
sync.acquire(1); |
491 |
long t = c.awaitNanos(100); |
492 |
assertTrue(t <= 0); |
493 |
sync.release(1); |
494 |
} |
495 |
|
496 |
/** |
497 |
* Timed await without a signal times out |
498 |
*/ |
499 |
public void testAwait_Timeout() throws InterruptedException { |
500 |
final Mutex sync = new Mutex(); |
501 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
502 |
sync.acquire(1); |
503 |
assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
504 |
sync.release(1); |
505 |
} |
506 |
|
507 |
/** |
508 |
* awaitUntil without a signal times out |
509 |
*/ |
510 |
public void testAwaitUntil_Timeout() throws InterruptedException { |
511 |
final Mutex sync = new Mutex(); |
512 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
513 |
sync.acquire(1); |
514 |
java.util.Date d = new java.util.Date(); |
515 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
516 |
sync.release(1); |
517 |
} |
518 |
|
519 |
/** |
520 |
* await returns when signalled |
521 |
*/ |
522 |
public void testAwait() throws InterruptedException { |
523 |
final Mutex sync = new Mutex(); |
524 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
525 |
Thread t = new Thread(new Runnable() { |
526 |
public void run() { |
527 |
try { |
528 |
sync.acquire(1); |
529 |
c.await(); |
530 |
sync.release(1); |
531 |
} |
532 |
catch (InterruptedException e) { |
533 |
threadUnexpectedException(e); |
534 |
} |
535 |
} |
536 |
}); |
537 |
|
538 |
t.start(); |
539 |
Thread.sleep(SHORT_DELAY_MS); |
540 |
sync.acquire(1); |
541 |
c.signal(); |
542 |
sync.release(1); |
543 |
t.join(SHORT_DELAY_MS); |
544 |
assertFalse(t.isAlive()); |
545 |
} |
546 |
|
547 |
|
548 |
|
549 |
/** |
550 |
* hasWaiters throws NPE if null |
551 |
*/ |
552 |
public void testHasWaitersNPE() { |
553 |
final Mutex sync = new Mutex(); |
554 |
try { |
555 |
sync.hasWaiters(null); |
556 |
shouldThrow(); |
557 |
} catch (NullPointerException success) {} |
558 |
} |
559 |
|
560 |
/** |
561 |
* getWaitQueueLength throws NPE if null |
562 |
*/ |
563 |
public void testGetWaitQueueLengthNPE() { |
564 |
final Mutex sync = new Mutex(); |
565 |
try { |
566 |
sync.getWaitQueueLength(null); |
567 |
shouldThrow(); |
568 |
} catch (NullPointerException success) {} |
569 |
} |
570 |
|
571 |
|
572 |
/** |
573 |
* getWaitingThreads throws NPE if null |
574 |
*/ |
575 |
public void testGetWaitingThreadsNPE() { |
576 |
final Mutex sync = new Mutex(); |
577 |
try { |
578 |
sync.getWaitingThreads(null); |
579 |
shouldThrow(); |
580 |
} catch (NullPointerException success) {} |
581 |
} |
582 |
|
583 |
|
584 |
/** |
585 |
* hasWaiters throws IAE if not owned |
586 |
*/ |
587 |
public void testHasWaitersIAE() { |
588 |
final Mutex sync = new Mutex(); |
589 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
590 |
final Mutex sync2 = new Mutex(); |
591 |
try { |
592 |
sync2.hasWaiters(c); |
593 |
shouldThrow(); |
594 |
} catch (IllegalArgumentException success) {} |
595 |
} |
596 |
|
597 |
/** |
598 |
* hasWaiters throws IMSE if not synced |
599 |
*/ |
600 |
public void testHasWaitersIMSE() { |
601 |
final Mutex sync = new Mutex(); |
602 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
603 |
try { |
604 |
sync.hasWaiters(c); |
605 |
shouldThrow(); |
606 |
} catch (IllegalMonitorStateException success) {} |
607 |
} |
608 |
|
609 |
|
610 |
/** |
611 |
* getWaitQueueLength throws IAE if not owned |
612 |
*/ |
613 |
public void testGetWaitQueueLengthIAE() { |
614 |
final Mutex sync = new Mutex(); |
615 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
616 |
final Mutex sync2 = new Mutex(); |
617 |
try { |
618 |
sync2.getWaitQueueLength(c); |
619 |
shouldThrow(); |
620 |
} catch (IllegalArgumentException success) {} |
621 |
} |
622 |
|
623 |
/** |
624 |
* getWaitQueueLength throws IMSE if not synced |
625 |
*/ |
626 |
public void testGetWaitQueueLengthIMSE() { |
627 |
final Mutex sync = new Mutex(); |
628 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
629 |
try { |
630 |
sync.getWaitQueueLength(c); |
631 |
shouldThrow(); |
632 |
} catch (IllegalMonitorStateException success) {} |
633 |
} |
634 |
|
635 |
|
636 |
/** |
637 |
* getWaitingThreads throws IAE if not owned |
638 |
*/ |
639 |
public void testGetWaitingThreadsIAE() { |
640 |
final Mutex sync = new Mutex(); |
641 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
642 |
final Mutex sync2 = new Mutex(); |
643 |
try { |
644 |
sync2.getWaitingThreads(c); |
645 |
shouldThrow(); |
646 |
} catch (IllegalArgumentException success) {} |
647 |
} |
648 |
|
649 |
/** |
650 |
* getWaitingThreads throws IMSE if not synced |
651 |
*/ |
652 |
public void testGetWaitingThreadsIMSE() { |
653 |
final Mutex sync = new Mutex(); |
654 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
655 |
try { |
656 |
sync.getWaitingThreads(c); |
657 |
shouldThrow(); |
658 |
} catch (IllegalMonitorStateException success) {} |
659 |
} |
660 |
|
661 |
|
662 |
|
663 |
/** |
664 |
* hasWaiters returns true when a thread is waiting, else false |
665 |
*/ |
666 |
public void testHasWaiters() throws InterruptedException { |
667 |
final Mutex sync = new Mutex(); |
668 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
669 |
Thread t = new Thread(new Runnable() { |
670 |
public void run() { |
671 |
try { |
672 |
sync.acquire(1); |
673 |
threadAssertFalse(sync.hasWaiters(c)); |
674 |
threadAssertEquals(0, sync.getWaitQueueLength(c)); |
675 |
c.await(); |
676 |
sync.release(1); |
677 |
} |
678 |
catch (InterruptedException e) { |
679 |
threadUnexpectedException(e); |
680 |
} |
681 |
} |
682 |
}); |
683 |
|
684 |
t.start(); |
685 |
Thread.sleep(SHORT_DELAY_MS); |
686 |
sync.acquire(1); |
687 |
assertTrue(sync.hasWaiters(c)); |
688 |
assertEquals(1, sync.getWaitQueueLength(c)); |
689 |
c.signal(); |
690 |
sync.release(1); |
691 |
Thread.sleep(SHORT_DELAY_MS); |
692 |
sync.acquire(1); |
693 |
assertFalse(sync.hasWaiters(c)); |
694 |
assertEquals(0, sync.getWaitQueueLength(c)); |
695 |
sync.release(1); |
696 |
t.join(SHORT_DELAY_MS); |
697 |
assertFalse(t.isAlive()); |
698 |
} |
699 |
|
700 |
/** |
701 |
* getWaitQueueLength returns number of waiting threads |
702 |
*/ |
703 |
public void testGetWaitQueueLength() throws InterruptedException { |
704 |
final Mutex sync = new Mutex(); |
705 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
706 |
Thread t1 = new Thread(new Runnable() { |
707 |
public void run() { |
708 |
try { |
709 |
sync.acquire(1); |
710 |
threadAssertFalse(sync.hasWaiters(c)); |
711 |
threadAssertEquals(0, sync.getWaitQueueLength(c)); |
712 |
c.await(); |
713 |
sync.release(1); |
714 |
} |
715 |
catch (InterruptedException e) { |
716 |
threadUnexpectedException(e); |
717 |
} |
718 |
} |
719 |
}); |
720 |
|
721 |
Thread t2 = new Thread(new Runnable() { |
722 |
public void run() { |
723 |
try { |
724 |
sync.acquire(1); |
725 |
threadAssertTrue(sync.hasWaiters(c)); |
726 |
threadAssertEquals(1, sync.getWaitQueueLength(c)); |
727 |
c.await(); |
728 |
sync.release(1); |
729 |
} |
730 |
catch (InterruptedException e) { |
731 |
threadUnexpectedException(e); |
732 |
} |
733 |
} |
734 |
}); |
735 |
|
736 |
t1.start(); |
737 |
Thread.sleep(SHORT_DELAY_MS); |
738 |
t2.start(); |
739 |
Thread.sleep(SHORT_DELAY_MS); |
740 |
sync.acquire(1); |
741 |
assertTrue(sync.hasWaiters(c)); |
742 |
assertEquals(2, sync.getWaitQueueLength(c)); |
743 |
c.signalAll(); |
744 |
sync.release(1); |
745 |
Thread.sleep(SHORT_DELAY_MS); |
746 |
sync.acquire(1); |
747 |
assertFalse(sync.hasWaiters(c)); |
748 |
assertEquals(0, sync.getWaitQueueLength(c)); |
749 |
sync.release(1); |
750 |
t1.join(SHORT_DELAY_MS); |
751 |
t2.join(SHORT_DELAY_MS); |
752 |
assertFalse(t1.isAlive()); |
753 |
assertFalse(t2.isAlive()); |
754 |
} |
755 |
|
756 |
/** |
757 |
* getWaitingThreads returns only and all waiting threads |
758 |
*/ |
759 |
public void testGetWaitingThreads() throws InterruptedException { |
760 |
final Mutex sync = new Mutex(); |
761 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
762 |
Thread t1 = new Thread(new Runnable() { |
763 |
public void run() { |
764 |
try { |
765 |
sync.acquire(1); |
766 |
threadAssertTrue(sync.getWaitingThreads(c).isEmpty()); |
767 |
c.await(); |
768 |
sync.release(1); |
769 |
} |
770 |
catch (InterruptedException e) { |
771 |
threadUnexpectedException(e); |
772 |
} |
773 |
} |
774 |
}); |
775 |
|
776 |
Thread t2 = new Thread(new Runnable() { |
777 |
public void run() { |
778 |
try { |
779 |
sync.acquire(1); |
780 |
threadAssertFalse(sync.getWaitingThreads(c).isEmpty()); |
781 |
c.await(); |
782 |
sync.release(1); |
783 |
} |
784 |
catch (InterruptedException e) { |
785 |
threadUnexpectedException(e); |
786 |
} |
787 |
} |
788 |
}); |
789 |
|
790 |
sync.acquire(1); |
791 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
792 |
sync.release(1); |
793 |
t1.start(); |
794 |
Thread.sleep(SHORT_DELAY_MS); |
795 |
t2.start(); |
796 |
Thread.sleep(SHORT_DELAY_MS); |
797 |
sync.acquire(1); |
798 |
assertTrue(sync.hasWaiters(c)); |
799 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
800 |
assertTrue(sync.getWaitingThreads(c).contains(t2)); |
801 |
c.signalAll(); |
802 |
sync.release(1); |
803 |
Thread.sleep(SHORT_DELAY_MS); |
804 |
sync.acquire(1); |
805 |
assertFalse(sync.hasWaiters(c)); |
806 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
807 |
sync.release(1); |
808 |
t1.join(SHORT_DELAY_MS); |
809 |
t2.join(SHORT_DELAY_MS); |
810 |
assertFalse(t1.isAlive()); |
811 |
assertFalse(t2.isAlive()); |
812 |
} |
813 |
|
814 |
|
815 |
|
816 |
/** |
817 |
* awaitUninterruptibly doesn't abort on interrupt |
818 |
*/ |
819 |
public void testAwaitUninterruptibly() throws InterruptedException { |
820 |
final Mutex sync = new Mutex(); |
821 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
822 |
Thread t = new Thread(new Runnable() { |
823 |
public void run() { |
824 |
sync.acquire(1); |
825 |
c.awaitUninterruptibly(); |
826 |
sync.release(1); |
827 |
} |
828 |
}); |
829 |
|
830 |
t.start(); |
831 |
Thread.sleep(SHORT_DELAY_MS); |
832 |
t.interrupt(); |
833 |
sync.acquire(1); |
834 |
c.signal(); |
835 |
sync.release(1); |
836 |
t.join(SHORT_DELAY_MS); |
837 |
assertFalse(t.isAlive()); |
838 |
} |
839 |
|
840 |
/** |
841 |
* await is interruptible |
842 |
*/ |
843 |
public void testAwait_Interrupt() throws InterruptedException { |
844 |
final Mutex sync = new Mutex(); |
845 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
846 |
Thread t = new Thread(new Runnable() { |
847 |
public void run() { |
848 |
try { |
849 |
sync.acquire(1); |
850 |
c.await(); |
851 |
sync.release(1); |
852 |
threadShouldThrow(); |
853 |
} |
854 |
catch (InterruptedException success) { |
855 |
} |
856 |
} |
857 |
}); |
858 |
|
859 |
t.start(); |
860 |
Thread.sleep(SHORT_DELAY_MS); |
861 |
t.interrupt(); |
862 |
t.join(SHORT_DELAY_MS); |
863 |
assertFalse(t.isAlive()); |
864 |
} |
865 |
|
866 |
/** |
867 |
* awaitNanos is interruptible |
868 |
*/ |
869 |
public void testAwaitNanos_Interrupt() throws InterruptedException { |
870 |
final Mutex sync = new Mutex(); |
871 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
872 |
Thread t = new Thread(new Runnable() { |
873 |
public void run() { |
874 |
try { |
875 |
sync.acquire(1); |
876 |
c.awaitNanos(1000 * 1000 * 1000); // 1 sec |
877 |
sync.release(1); |
878 |
threadShouldThrow(); |
879 |
} |
880 |
catch (InterruptedException success) { |
881 |
} |
882 |
} |
883 |
}); |
884 |
|
885 |
t.start(); |
886 |
Thread.sleep(SHORT_DELAY_MS); |
887 |
t.interrupt(); |
888 |
t.join(SHORT_DELAY_MS); |
889 |
assertFalse(t.isAlive()); |
890 |
} |
891 |
|
892 |
/** |
893 |
* awaitUntil is interruptible |
894 |
*/ |
895 |
public void testAwaitUntil_Interrupt() throws InterruptedException { |
896 |
final Mutex sync = new Mutex(); |
897 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
898 |
Thread t = new Thread(new Runnable() { |
899 |
public void run() { |
900 |
try { |
901 |
sync.acquire(1); |
902 |
java.util.Date d = new java.util.Date(); |
903 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
904 |
sync.release(1); |
905 |
threadShouldThrow(); |
906 |
} |
907 |
catch (InterruptedException success) { |
908 |
} |
909 |
} |
910 |
}); |
911 |
|
912 |
t.start(); |
913 |
Thread.sleep(SHORT_DELAY_MS); |
914 |
t.interrupt(); |
915 |
t.join(SHORT_DELAY_MS); |
916 |
assertFalse(t.isAlive()); |
917 |
} |
918 |
|
919 |
/** |
920 |
* signalAll wakes up all threads |
921 |
*/ |
922 |
public void testSignalAll() throws InterruptedException { |
923 |
final Mutex sync = new Mutex(); |
924 |
final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition(); |
925 |
Thread t1 = new Thread(new Runnable() { |
926 |
public void run() { |
927 |
try { |
928 |
sync.acquire(1); |
929 |
c.await(); |
930 |
sync.release(1); |
931 |
} |
932 |
catch (InterruptedException e) { |
933 |
threadUnexpectedException(); |
934 |
} |
935 |
} |
936 |
}); |
937 |
|
938 |
Thread t2 = new Thread(new Runnable() { |
939 |
public void run() { |
940 |
try { |
941 |
sync.acquire(1); |
942 |
c.await(); |
943 |
sync.release(1); |
944 |
} |
945 |
catch (InterruptedException e) { |
946 |
threadUnexpectedException(); |
947 |
} |
948 |
} |
949 |
}); |
950 |
|
951 |
t1.start(); |
952 |
t2.start(); |
953 |
Thread.sleep(SHORT_DELAY_MS); |
954 |
sync.acquire(1); |
955 |
c.signalAll(); |
956 |
sync.release(1); |
957 |
t1.join(SHORT_DELAY_MS); |
958 |
t2.join(SHORT_DELAY_MS); |
959 |
assertFalse(t1.isAlive()); |
960 |
assertFalse(t2.isAlive()); |
961 |
} |
962 |
|
963 |
|
964 |
/** |
965 |
* toString indicates current state |
966 |
*/ |
967 |
public void testToString() { |
968 |
Mutex sync = new Mutex(); |
969 |
String us = sync.toString(); |
970 |
assertTrue(us.indexOf("State = 0") >= 0); |
971 |
sync.acquire(1); |
972 |
String ls = sync.toString(); |
973 |
assertTrue(ls.indexOf("State = " + Mutex.LOCKED) >= 0); |
974 |
} |
975 |
|
976 |
/** |
977 |
* A serialized AQS deserializes with current state |
978 |
*/ |
979 |
public void testSerialization() throws Exception { |
980 |
Mutex l = new Mutex(); |
981 |
l.acquire(1); |
982 |
assertTrue(l.isHeldExclusively()); |
983 |
|
984 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
985 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
986 |
out.writeObject(l); |
987 |
out.close(); |
988 |
|
989 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
990 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
991 |
Mutex r = (Mutex) in.readObject(); |
992 |
assertTrue(r.isHeldExclusively()); |
993 |
} |
994 |
|
995 |
|
996 |
/** |
997 |
* tryReleaseShared setting state changes getState |
998 |
*/ |
999 |
public void testGetStateWithReleaseShared() { |
1000 |
final BooleanLatch l = new BooleanLatch(); |
1001 |
assertFalse(l.isSignalled()); |
1002 |
l.releaseShared(0); |
1003 |
assertTrue(l.isSignalled()); |
1004 |
} |
1005 |
|
1006 |
/** |
1007 |
* releaseShared has no effect when already signalled |
1008 |
*/ |
1009 |
public void testReleaseShared() { |
1010 |
final BooleanLatch l = new BooleanLatch(); |
1011 |
assertFalse(l.isSignalled()); |
1012 |
l.releaseShared(0); |
1013 |
assertTrue(l.isSignalled()); |
1014 |
l.releaseShared(0); |
1015 |
assertTrue(l.isSignalled()); |
1016 |
} |
1017 |
|
1018 |
/** |
1019 |
* acquireSharedInterruptibly returns after release, but not before |
1020 |
*/ |
1021 |
public void testAcquireSharedInterruptibly() throws InterruptedException { |
1022 |
final BooleanLatch l = new BooleanLatch(); |
1023 |
|
1024 |
Thread t = new Thread(new Runnable() { |
1025 |
public void run() { |
1026 |
try { |
1027 |
threadAssertFalse(l.isSignalled()); |
1028 |
l.acquireSharedInterruptibly(0); |
1029 |
threadAssertTrue(l.isSignalled()); |
1030 |
} catch (InterruptedException e) { |
1031 |
threadUnexpectedException(); |
1032 |
} |
1033 |
} |
1034 |
}); |
1035 |
|
1036 |
t.start(); |
1037 |
assertFalse(l.isSignalled()); |
1038 |
Thread.sleep(SHORT_DELAY_MS); |
1039 |
l.releaseShared(0); |
1040 |
assertTrue(l.isSignalled()); |
1041 |
t.join(); |
1042 |
} |
1043 |
|
1044 |
|
1045 |
/** |
1046 |
* acquireSharedTimed returns after release |
1047 |
*/ |
1048 |
public void testAsquireSharedTimed() throws InterruptedException { |
1049 |
final BooleanLatch l = new BooleanLatch(); |
1050 |
|
1051 |
Thread t = new Thread(new Runnable() { |
1052 |
public void run() { |
1053 |
try { |
1054 |
threadAssertFalse(l.isSignalled()); |
1055 |
threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000)); |
1056 |
threadAssertTrue(l.isSignalled()); |
1057 |
|
1058 |
} catch (InterruptedException e) { |
1059 |
threadUnexpectedException(); |
1060 |
} |
1061 |
} |
1062 |
}); |
1063 |
|
1064 |
t.start(); |
1065 |
assertFalse(l.isSignalled()); |
1066 |
Thread.sleep(SHORT_DELAY_MS); |
1067 |
l.releaseShared(0); |
1068 |
assertTrue(l.isSignalled()); |
1069 |
t.join(); |
1070 |
} |
1071 |
|
1072 |
/** |
1073 |
* acquireSharedInterruptibly throws IE if interrupted before released |
1074 |
*/ |
1075 |
public void testAcquireSharedInterruptibly_InterruptedException() throws InterruptedException { |
1076 |
final BooleanLatch l = new BooleanLatch(); |
1077 |
Thread t = new Thread(new Runnable() { |
1078 |
public void run() { |
1079 |
try { |
1080 |
threadAssertFalse(l.isSignalled()); |
1081 |
l.acquireSharedInterruptibly(0); |
1082 |
threadShouldThrow(); |
1083 |
} catch (InterruptedException success) {} |
1084 |
} |
1085 |
}); |
1086 |
|
1087 |
t.start(); |
1088 |
assertFalse(l.isSignalled()); |
1089 |
t.interrupt(); |
1090 |
t.join(); |
1091 |
} |
1092 |
|
1093 |
/** |
1094 |
* acquireSharedTimed throws IE if interrupted before released |
1095 |
*/ |
1096 |
public void testAcquireSharedNanos_InterruptedException() throws InterruptedException { |
1097 |
final BooleanLatch l = new BooleanLatch(); |
1098 |
Thread t = new Thread(new Runnable() { |
1099 |
public void run() { |
1100 |
try { |
1101 |
threadAssertFalse(l.isSignalled()); |
1102 |
l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000); |
1103 |
threadShouldThrow(); |
1104 |
} catch (InterruptedException success) {} |
1105 |
} |
1106 |
}); |
1107 |
|
1108 |
t.start(); |
1109 |
Thread.sleep(SHORT_DELAY_MS); |
1110 |
assertFalse(l.isSignalled()); |
1111 |
t.interrupt(); |
1112 |
t.join(); |
1113 |
} |
1114 |
|
1115 |
/** |
1116 |
* acquireSharedTimed times out if not released before timeout |
1117 |
*/ |
1118 |
public void testAcquireSharedNanos_Timeout() throws InterruptedException { |
1119 |
final BooleanLatch l = new BooleanLatch(); |
1120 |
Thread t = new Thread(new Runnable() { |
1121 |
public void run() { |
1122 |
try { |
1123 |
threadAssertFalse(l.isSignalled()); |
1124 |
threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000)); |
1125 |
} catch (InterruptedException ie) { |
1126 |
threadUnexpectedException(); |
1127 |
} |
1128 |
} |
1129 |
}); |
1130 |
|
1131 |
t.start(); |
1132 |
Thread.sleep(SHORT_DELAY_MS); |
1133 |
assertFalse(l.isSignalled()); |
1134 |
t.join(); |
1135 |
} |
1136 |
|
1137 |
|
1138 |
} |