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root/jsr166/jsr166/src/test/tck/ReentrantReadWriteLockTest.java

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.18 by dl, Sat Jan 10 01:41:59 2004 UTC vs.
Revision 1.21 by dl, Thu Jan 20 00:39:13 2005 UTC

#	Line 376 | Line 376 | public class ReentrantReadWriteLockTest
376		}
377		}
378
379	+	/**
380	+	* Read trylock succeeds if write locked by current thread
381	+	*/
382	+	public void testReadHoldingWriteLock() {
383	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
384	+	lock.writeLock().lock();
385	+	assertTrue(lock.readLock().tryLock());
386	+	lock.readLock().unlock();
387	+	lock.writeLock().unlock();
388	+	}
389	+
390	+	/**
391	+	* Read lock succeeds if write locked by current thread even if
392	+	* other threads are waiting
393	+	*/
394	+	public void testReadHoldingWriteLock2() {
395	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
396	+	lock.writeLock().lock();
397	+	Thread t1 = new Thread(new Runnable() {
398	+	public void run() {
399	+	lock.readLock().lock();
400	+	lock.readLock().unlock();
401	+	}
402	+	});
403	+	Thread t2 = new Thread(new Runnable() {
404	+	public void run() {
405	+	lock.readLock().lock();
406	+	lock.readLock().unlock();
407	+	}
408	+	});
409	+
410	+	try {
411	+	t1.start();
412	+	t2.start();
413	+	lock.readLock().lock();
414	+	lock.readLock().unlock();
415	+	Thread.sleep(SHORT_DELAY_MS);
416	+	lock.readLock().lock();
417	+	lock.readLock().unlock();
418	+	lock.writeLock().unlock();
419	+	t1.join(MEDIUM_DELAY_MS);
420	+	t2.join(MEDIUM_DELAY_MS);
421	+	assertTrue(!t1.isAlive());
422	+	assertTrue(!t2.isAlive());
423	+
424	+	} catch(Exception e){
425	+	unexpectedException();
426	+	}
427	+	}
428	+
429	+	/**
430	+	* Fair Read trylock succeeds if write locked by current thread
431	+	*/
432	+	public void testReadHoldingWriteLockFair() {
433	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
434	+	lock.writeLock().lock();
435	+	assertTrue(lock.readLock().tryLock());
436	+	lock.readLock().unlock();
437	+	lock.writeLock().unlock();
438	+	}
439	+
440	+	/**
441	+	* Fair Read lock succeeds if write locked by current thread even if
442	+	* other threads are waiting
443	+	*/
444	+	public void testReadHoldingWriteLockFair2() {
445	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
446	+	lock.writeLock().lock();
447	+	Thread t1 = new Thread(new Runnable() {
448	+	public void run() {
449	+	lock.readLock().lock();
450	+	lock.readLock().unlock();
451	+	}
452	+	});
453	+	Thread t2 = new Thread(new Runnable() {
454	+	public void run() {
455	+	lock.readLock().lock();
456	+	lock.readLock().unlock();
457	+	}
458	+	});
459	+
460	+	try {
461	+	t1.start();
462	+	t2.start();
463	+	lock.readLock().lock();
464	+	lock.readLock().unlock();
465	+	Thread.sleep(SHORT_DELAY_MS);
466	+	lock.readLock().lock();
467	+	lock.readLock().unlock();
468	+	lock.writeLock().unlock();
469	+	t1.join(MEDIUM_DELAY_MS);
470	+	t2.join(MEDIUM_DELAY_MS);
471	+	assertTrue(!t1.isAlive());
472	+	assertTrue(!t2.isAlive());
473	+
474	+	} catch(Exception e){
475	+	unexpectedException();
476	+	}
477	+	}
478	+
479
480		/**
481		* Read tryLock succeeds if readlocked but not writelocked
#	Line 591 | Line 691 | public class ReentrantReadWriteLockTest
691		final Condition c = lock.writeLock().newCondition();
692		try {
693		lock.writeLock().lock();
594	–	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
694		lock.writeLock().unlock();
695		}
696		catch (Exception ex) {
#	Line 608 | Line 707 | public class ReentrantReadWriteLockTest
707		try {
708		lock.writeLock().lock();
709		java.util.Date d = new java.util.Date();
611	–	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
710		lock.writeLock().unlock();
711		}
712		catch (Exception ex) {
#	Line 877 | Line 975 | public class ReentrantReadWriteLockTest
975		}
976
977		/**
978	+	* hasQueuedThread(null) throws NPE
979	+	*/
980	+	public void testHasQueuedThreadNPE() {
981	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
982	+	try {
983	+	sync.hasQueuedThread(null);
984	+	shouldThrow();
985	+	} catch (NullPointerException success) {
986	+	}
987	+	}
988	+
989	+	/**
990	+	* hasQueuedThread reports whether a thread is queued.
991	+	*/
992	+	public void testHasQueuedThread() {
993	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
994	+	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
995	+	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
996	+	try {
997	+	assertFalse(sync.hasQueuedThread(t1));
998	+	assertFalse(sync.hasQueuedThread(t2));
999	+	sync.writeLock().lock();
1000	+	t1.start();
1001	+	Thread.sleep(SHORT_DELAY_MS);
1002	+	assertTrue(sync.hasQueuedThread(t1));
1003	+	t2.start();
1004	+	Thread.sleep(SHORT_DELAY_MS);
1005	+	assertTrue(sync.hasQueuedThread(t1));
1006	+	assertTrue(sync.hasQueuedThread(t2));
1007	+	t1.interrupt();
1008	+	Thread.sleep(SHORT_DELAY_MS);
1009	+	assertFalse(sync.hasQueuedThread(t1));
1010	+	assertTrue(sync.hasQueuedThread(t2));
1011	+	sync.writeLock().unlock();
1012	+	Thread.sleep(SHORT_DELAY_MS);
1013	+	assertFalse(sync.hasQueuedThread(t1));
1014	+	Thread.sleep(SHORT_DELAY_MS);
1015	+	assertFalse(sync.hasQueuedThread(t2));
1016	+	t1.join();
1017	+	t2.join();
1018	+	} catch(Exception e){
1019	+	unexpectedException();
1020	+	}
1021	+	}
1022	+
1023	+
1024	+	/**
1025		* getQueueLength reports number of waiting threads
1026		*/
1027		public void testGetQueueLength() {

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