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import junit.framework.*; |
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import java.util.concurrent.locks.*; |
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import java.util.concurrent.*; |
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import java.util.*; |
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import java.io.*; |
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|
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public class ReentrantLockTest extends JSR166TestCase { |
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static int HOLD_COUNT_TEST_LIMIT = 20; |
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|
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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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|
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public static Test suite() { |
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return new TestSuite(ReentrantLockTest.class); |
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} |
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|
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static int HOLD_COUNT_TEST_LIMIT = 20; |
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|
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class InterruptibleLockRunnable implements Runnable { |
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final ReentrantLock lock; |
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InterruptibleLockRunnable(ReentrantLock l) { lock = l; } |
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public void run(){ |
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try{ |
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lock.lockInterruptibly(); |
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} catch(InterruptedException success){} |
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} |
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} |
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|
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// Same, except must interrupt |
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class InterruptedLockRunnable implements Runnable { |
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final ReentrantLock lock; |
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InterruptedLockRunnable(ReentrantLock l) { lock = l; } |
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public void run(){ |
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try{ |
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lock.lockInterruptibly(); |
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threadFail("should throw"); |
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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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* To expose protected methods |
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*/ |
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static class MyReentrantLock extends ReentrantLock { |
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MyReentrantLock() { super(); } |
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public Collection<Thread> getQueuedThreads() { |
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return super.getQueuedThreads(); |
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} |
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public ConditionObject newCondition() { |
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return new MyCondition(this); |
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} |
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|
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static class MyCondition extends ReentrantLock.ConditionObject { |
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MyCondition(MyReentrantLock l) { super(l); } |
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public Collection<Thread> getWaitingThreads() { |
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return super.getWaitingThreads(); |
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} |
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} |
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|
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} |
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|
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/* |
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* Unlocks an unlocked lock, throws Illegal Monitor State |
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< |
* |
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> |
* Unlocking an unlocked lock throws IllegalMonitorStateException |
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*/ |
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public void testIllegalMonitorStateException(){ |
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ReentrantLock rl = new ReentrantLock(); |
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fail("Should of thown Illegal Monitor State Exception"); |
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|
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} catch(IllegalMonitorStateException 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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/* |
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* makes a lock, locks it, tries to aquire the lock in another thread |
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* interrupts that thread and waits for an interrupted Exception to |
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* be thrown. |
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* lockInterruptibly is interruptible. |
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*/ |
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|
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public void testInterruptedException(){ |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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Thread t = new Thread(new Runnable() { |
49 |
< |
public void run(){ |
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< |
try{ |
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< |
lock.lockInterruptibly(); |
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< |
threadFail("should throw"); |
53 |
< |
} catch(InterruptedException success){} |
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< |
} |
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< |
}); |
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> |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
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try { |
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t.start(); |
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t.interrupt(); |
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} |
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|
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/* |
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* tests for interrupted exception on a timed wait |
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* |
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* getLockQueueLength reports number of waiting threads |
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*/ |
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|
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> |
public void testgetLockQueueLength(){ |
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final ReentrantLock lock = new ReentrantLock(); |
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> |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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> |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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> |
try { |
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> |
assertEquals(0, lock.getLockQueueLength()); |
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> |
lock.lock(); |
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> |
t1.start(); |
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> |
Thread.sleep(SHORT_DELAY_MS); |
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> |
assertEquals(1, lock.getLockQueueLength()); |
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> |
t2.start(); |
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> |
Thread.sleep(SHORT_DELAY_MS); |
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> |
assertEquals(2, lock.getLockQueueLength()); |
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> |
t1.interrupt(); |
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> |
Thread.sleep(SHORT_DELAY_MS); |
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> |
assertEquals(1, lock.getLockQueueLength()); |
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> |
lock.unlock(); |
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> |
Thread.sleep(SHORT_DELAY_MS); |
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> |
assertEquals(0, lock.getLockQueueLength()); |
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> |
t1.join(); |
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> |
t2.join(); |
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> |
} catch(Exception e){ |
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> |
fail("unexpected exception"); |
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> |
} |
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> |
} |
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|
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/* |
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* getQueuedThreads includes waiting threads |
127 |
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*/ |
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public void testGetQueuedThreads(){ |
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final MyReentrantLock lock = new MyReentrantLock(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
132 |
+ |
try { |
133 |
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assertTrue(lock.getQueuedThreads().isEmpty()); |
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lock.lock(); |
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assertTrue(lock.getQueuedThreads().isEmpty()); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.getQueuedThreads().contains(t1)); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.getQueuedThreads().contains(t1)); |
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assertTrue(lock.getQueuedThreads().contains(t2)); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(lock.getQueuedThreads().contains(t1)); |
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assertTrue(lock.getQueuedThreads().contains(t2)); |
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lock.unlock(); |
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Thread.sleep(SHORT_DELAY_MS); |
149 |
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assertTrue(lock.getQueuedThreads().isEmpty()); |
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t1.join(); |
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t2.join(); |
152 |
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} catch(Exception e){ |
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fail("unexpected exception"); |
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} |
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} |
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|
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|
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/* |
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* timed trylock is interruptible. |
160 |
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*/ |
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public void testInterruptedException2(){ |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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|
} |
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|
180 |
|
|
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/** |
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* Trylock on a locked lock fails |
183 |
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*/ |
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public void testTryLockWhenLocked() { |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
198 |
|
} |
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|
} |
200 |
|
|
201 |
+ |
/** |
202 |
+ |
* Timed Trylock on a locked lock times out |
203 |
+ |
*/ |
204 |
|
public void testTryLock_Timeout(){ |
205 |
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final ReentrantLock lock = new ReentrantLock(); |
206 |
|
lock.lock(); |
222 |
|
} |
223 |
|
} |
224 |
|
|
225 |
+ |
/** |
226 |
+ |
* getHoldCount returns number of recursive holds |
227 |
+ |
*/ |
228 |
|
public void testGetHoldCount() { |
229 |
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ReentrantLock lock = new ReentrantLock(); |
230 |
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for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) { |
238 |
|
} |
239 |
|
|
240 |
|
|
241 |
< |
|
242 |
< |
|
241 |
> |
/** |
242 |
> |
* isLocked is true when locked and false when not |
243 |
> |
*/ |
244 |
|
public void testIsLocked() { |
245 |
|
final ReentrantLock lock = new ReentrantLock(); |
246 |
|
lock.lock(); |
271 |
|
} |
272 |
|
|
273 |
|
|
274 |
+ |
/** |
275 |
+ |
* lockInterruptibly succeeds when unlocked, else is interruptible |
276 |
+ |
*/ |
277 |
|
public void testLockInterruptibly() { |
278 |
|
final ReentrantLock lock = new ReentrantLock(); |
279 |
|
try { |
281 |
|
} catch(Exception e) { |
282 |
|
fail("unexpected exception"); |
283 |
|
} |
284 |
< |
Thread t = new Thread(new Runnable() { |
183 |
< |
public void run() { |
184 |
< |
try { |
185 |
< |
lock.lockInterruptibly(); |
186 |
< |
threadFail("should throw"); |
187 |
< |
} |
188 |
< |
catch(InterruptedException e) {} |
189 |
< |
} |
190 |
< |
}); |
284 |
> |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
285 |
|
try { |
286 |
|
t.start(); |
287 |
|
t.interrupt(); |
364 |
|
|
365 |
|
public void testAwait() { |
366 |
|
final ReentrantLock lock = new ReentrantLock(); |
367 |
< |
final Condition c = lock.newCondition(); |
367 |
> |
final ReentrantLock.ConditionObject c = lock.newCondition(); |
368 |
|
Thread t = new Thread(new Runnable() { |
369 |
|
public void run() { |
370 |
|
try { |
389 |
|
} |
390 |
|
catch (Exception ex) { |
391 |
|
fail("unexpected exception"); |
392 |
+ |
} |
393 |
+ |
} |
394 |
+ |
|
395 |
+ |
public void testHasWaiters() { |
396 |
+ |
final ReentrantLock lock = new ReentrantLock(); |
397 |
+ |
final ReentrantLock.ConditionObject c = lock.newCondition(); |
398 |
+ |
Thread t = new Thread(new Runnable() { |
399 |
+ |
public void run() { |
400 |
+ |
try { |
401 |
+ |
lock.lock(); |
402 |
+ |
threadAssertFalse(c.hasWaiters()); |
403 |
+ |
threadAssertEquals(0, c.getWaitQueueLength()); |
404 |
+ |
c.await(); |
405 |
+ |
lock.unlock(); |
406 |
+ |
} |
407 |
+ |
catch(InterruptedException e) { |
408 |
+ |
threadFail("unexpected exception"); |
409 |
+ |
} |
410 |
+ |
} |
411 |
+ |
}); |
412 |
+ |
|
413 |
+ |
try { |
414 |
+ |
t.start(); |
415 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
416 |
+ |
lock.lock(); |
417 |
+ |
assertTrue(c.hasWaiters()); |
418 |
+ |
assertEquals(1, c.getWaitQueueLength()); |
419 |
+ |
c.signal(); |
420 |
+ |
lock.unlock(); |
421 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
422 |
+ |
lock.lock(); |
423 |
+ |
assertFalse(c.hasWaiters()); |
424 |
+ |
assertEquals(0, c.getWaitQueueLength()); |
425 |
+ |
lock.unlock(); |
426 |
+ |
t.join(SHORT_DELAY_MS); |
427 |
+ |
assertFalse(t.isAlive()); |
428 |
+ |
} |
429 |
+ |
catch (Exception ex) { |
430 |
+ |
fail("unexpected exception"); |
431 |
+ |
} |
432 |
+ |
} |
433 |
+ |
|
434 |
+ |
public void testGetWaitQueueLength() { |
435 |
+ |
final ReentrantLock lock = new ReentrantLock(); |
436 |
+ |
final ReentrantLock.ConditionObject c = lock.newCondition(); |
437 |
+ |
Thread t1 = new Thread(new Runnable() { |
438 |
+ |
public void run() { |
439 |
+ |
try { |
440 |
+ |
lock.lock(); |
441 |
+ |
threadAssertFalse(c.hasWaiters()); |
442 |
+ |
threadAssertEquals(0, c.getWaitQueueLength()); |
443 |
+ |
c.await(); |
444 |
+ |
lock.unlock(); |
445 |
+ |
} |
446 |
+ |
catch(InterruptedException e) { |
447 |
+ |
threadFail("unexpected exception"); |
448 |
+ |
} |
449 |
+ |
} |
450 |
+ |
}); |
451 |
+ |
|
452 |
+ |
Thread t2 = new Thread(new Runnable() { |
453 |
+ |
public void run() { |
454 |
+ |
try { |
455 |
+ |
lock.lock(); |
456 |
+ |
threadAssertTrue(c.hasWaiters()); |
457 |
+ |
threadAssertEquals(1, c.getWaitQueueLength()); |
458 |
+ |
c.await(); |
459 |
+ |
lock.unlock(); |
460 |
+ |
} |
461 |
+ |
catch(InterruptedException e) { |
462 |
+ |
threadFail("unexpected exception"); |
463 |
+ |
} |
464 |
+ |
} |
465 |
+ |
}); |
466 |
+ |
|
467 |
+ |
try { |
468 |
+ |
t1.start(); |
469 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
470 |
+ |
t2.start(); |
471 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
472 |
+ |
lock.lock(); |
473 |
+ |
assertTrue(c.hasWaiters()); |
474 |
+ |
assertEquals(2, c.getWaitQueueLength()); |
475 |
+ |
c.signalAll(); |
476 |
+ |
lock.unlock(); |
477 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
478 |
+ |
lock.lock(); |
479 |
+ |
assertFalse(c.hasWaiters()); |
480 |
+ |
assertEquals(0, c.getWaitQueueLength()); |
481 |
+ |
lock.unlock(); |
482 |
+ |
t1.join(SHORT_DELAY_MS); |
483 |
+ |
t2.join(SHORT_DELAY_MS); |
484 |
+ |
assertFalse(t1.isAlive()); |
485 |
+ |
assertFalse(t2.isAlive()); |
486 |
+ |
} |
487 |
+ |
catch (Exception ex) { |
488 |
+ |
fail("unexpected exception"); |
489 |
+ |
} |
490 |
+ |
} |
491 |
+ |
|
492 |
+ |
public void testGetWaitingThreads() { |
493 |
+ |
final MyReentrantLock lock = new MyReentrantLock(); |
494 |
+ |
final MyReentrantLock.MyCondition c = (MyReentrantLock.MyCondition)lock.newCondition(); |
495 |
+ |
Thread t1 = new Thread(new Runnable() { |
496 |
+ |
public void run() { |
497 |
+ |
try { |
498 |
+ |
lock.lock(); |
499 |
+ |
threadAssertTrue(c.getWaitingThreads().isEmpty()); |
500 |
+ |
c.await(); |
501 |
+ |
lock.unlock(); |
502 |
+ |
} |
503 |
+ |
catch(InterruptedException e) { |
504 |
+ |
threadFail("unexpected exception"); |
505 |
+ |
} |
506 |
+ |
} |
507 |
+ |
}); |
508 |
+ |
|
509 |
+ |
Thread t2 = new Thread(new Runnable() { |
510 |
+ |
public void run() { |
511 |
+ |
try { |
512 |
+ |
lock.lock(); |
513 |
+ |
threadAssertFalse(c.getWaitingThreads().isEmpty()); |
514 |
+ |
c.await(); |
515 |
+ |
lock.unlock(); |
516 |
+ |
} |
517 |
+ |
catch(InterruptedException e) { |
518 |
+ |
threadFail("unexpected exception"); |
519 |
+ |
} |
520 |
+ |
} |
521 |
+ |
}); |
522 |
+ |
|
523 |
+ |
try { |
524 |
+ |
lock.lock(); |
525 |
+ |
assertTrue(c.getWaitingThreads().isEmpty()); |
526 |
+ |
lock.unlock(); |
527 |
+ |
t1.start(); |
528 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
529 |
+ |
t2.start(); |
530 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
531 |
+ |
lock.lock(); |
532 |
+ |
assertTrue(c.hasWaiters()); |
533 |
+ |
assertTrue(c.getWaitingThreads().contains(t1)); |
534 |
+ |
assertTrue(c.getWaitingThreads().contains(t2)); |
535 |
+ |
c.signalAll(); |
536 |
+ |
lock.unlock(); |
537 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
538 |
+ |
lock.lock(); |
539 |
+ |
assertFalse(c.hasWaiters()); |
540 |
+ |
assertTrue(c.getWaitingThreads().isEmpty()); |
541 |
+ |
lock.unlock(); |
542 |
+ |
t1.join(SHORT_DELAY_MS); |
543 |
+ |
t2.join(SHORT_DELAY_MS); |
544 |
+ |
assertFalse(t1.isAlive()); |
545 |
+ |
assertFalse(t2.isAlive()); |
546 |
+ |
} |
547 |
+ |
catch (Exception ex) { |
548 |
+ |
fail("unexpected exception"); |
549 |
|
} |
550 |
|
} |
551 |
|
|