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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.15 by dl, Mon Dec 29 19:05:40 2003 UTC vs.
Revision 1.20 by dl, Fri Jul 2 10:24:00 2004 UTC

#	Line 156 | Line 156 | public class ReentrantReadWriteLockTest
156		*/
157		public void testWriteLockInterruptibly_Interrupted() {
158		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
159	–	lock.writeLock().lock();
159		Thread t = new Thread(new Runnable() {
160		public void run() {
161		try {
162		lock.writeLock().lockInterruptibly();
163	<	threadShouldThrow();
163	>	lock.writeLock().unlock();
164	>	lock.writeLock().lockInterruptibly();
165	>	lock.writeLock().unlock();
166		} catch(InterruptedException success){}
167		}
168		});
169		try {
170	+	lock.writeLock().lock();
171		t.start();
172		t.interrupt();
173		lock.writeLock().unlock();
#	Line 185 | Line 187 | public class ReentrantReadWriteLockTest
187		public void run() {
188		try {
189		lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
188	–	threadShouldThrow();
190		} catch(InterruptedException success){}
191		}
192		});
#	Line 209 | Line 210 | public class ReentrantReadWriteLockTest
210		public void run() {
211		try {
212		lock.readLock().lockInterruptibly();
212	–	threadShouldThrow();
213		} catch(InterruptedException success){}
214		}
215		});
#	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 877 | Line 977 | public class ReentrantReadWriteLockTest
977		}
978
979		/**
980	+	* hasQueuedThread(null) throws NPE
981	+	*/
982	+	public void testHasQueuedThreadNPE() {
983	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
984	+	try {
985	+	sync.hasQueuedThread(null);
986	+	shouldThrow();
987	+	} catch (NullPointerException success) {
988	+	}
989	+	}
990	+
991	+	/**
992	+	* hasQueuedThread reports whether a thread is queued.
993	+	*/
994	+	public void testHasQueuedThread() {
995	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
996	+	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
997	+	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
998	+	try {
999	+	assertFalse(sync.hasQueuedThread(t1));
1000	+	assertFalse(sync.hasQueuedThread(t2));
1001	+	sync.writeLock().lock();
1002	+	t1.start();
1003	+	Thread.sleep(SHORT_DELAY_MS);
1004	+	assertTrue(sync.hasQueuedThread(t1));
1005	+	t2.start();
1006	+	Thread.sleep(SHORT_DELAY_MS);
1007	+	assertTrue(sync.hasQueuedThread(t1));
1008	+	assertTrue(sync.hasQueuedThread(t2));
1009	+	t1.interrupt();
1010	+	Thread.sleep(SHORT_DELAY_MS);
1011	+	assertFalse(sync.hasQueuedThread(t1));
1012	+	assertTrue(sync.hasQueuedThread(t2));
1013	+	sync.writeLock().unlock();
1014	+	Thread.sleep(SHORT_DELAY_MS);
1015	+	assertFalse(sync.hasQueuedThread(t1));
1016	+	Thread.sleep(SHORT_DELAY_MS);
1017	+	assertFalse(sync.hasQueuedThread(t2));
1018	+	t1.join();
1019	+	t2.join();
1020	+	} catch(Exception e){
1021	+	unexpectedException();
1022	+	}
1023	+	}
1024	+
1025	+
1026	+	/**
1027		* getQueueLength reports number of waiting threads
1028		*/
1029		public void testGetQueueLength() {
#	Line 1224 | Line 1371 | public class ReentrantReadWriteLockTest
1371		}
1372		}
1373
1374	+	/**
1375	+	* toString indicates current lock state
1376	+	*/
1377	+	public void testToString() {
1378	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1379	+	String us = lock.toString();
1380	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1381	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1382	+	lock.writeLock().lock();
1383	+	String ws = lock.toString();
1384	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1385	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1386	+	lock.writeLock().unlock();
1387	+	lock.readLock().lock();
1388	+	lock.readLock().lock();
1389	+	String rs = lock.toString();
1390	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1391	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1392	+	}
1393	+
1394	+	/**
1395	+	* readLock.toString indicates current lock state
1396	+	*/
1397	+	public void testReadLockToString() {
1398	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1399	+	String us = lock.readLock().toString();
1400	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1401	+	lock.readLock().lock();
1402	+	lock.readLock().lock();
1403	+	String rs = lock.readLock().toString();
1404	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1405	+	}
1406	+
1407	+	/**
1408	+	* writeLock.toString indicates current lock state
1409	+	*/
1410	+	public void testWriteLockToString() {
1411	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1412	+	String us = lock.writeLock().toString();
1413	+	assertTrue(us.indexOf("Unlocked") >= 0);
1414	+	lock.writeLock().lock();
1415	+	String ls = lock.writeLock().toString();
1416	+	assertTrue(ls.indexOf("Locked") >= 0);
1417	+	}
1418	+
1419		}

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