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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
* 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 AbstractQueuedSynchronizerTest 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(AbstractQueuedSynchronizerTest.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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* AbstractQueuedSynchronizer javadoc. Exclusive acquire tests |
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* exercise this as a sample user extension. Other |
28 |
* methods/features of AbstractQueuedSynchronizerTest 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 AbstractQueuedSynchronizer { |
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public boolean isLocked() { return getState() == 1; } |
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|
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public boolean tryAcquireExclusive(int acquires) { |
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assertTrue(acquires == 1); |
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return compareAndSetState(0, 1); |
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} |
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|
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public boolean tryReleaseExclusive(int releases) { |
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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 void checkConditionAccess(Thread thread) { |
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if (getState() == 0) throw new IllegalMonitorStateException(); |
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} |
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|
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public AbstractQueuedSynchronizer.ConditionObject newCondition() { return new AbstractQueuedSynchronizer.ConditionObject(); } |
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|
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public void lock() { |
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acquireExclusiveUninterruptibly(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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/** |
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* A simple latch class, to test shared mode. |
60 |
*/ |
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static class BooleanLatch extends AbstractQueuedSynchronizer { |
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public boolean isSignalled() { return getState() != 0; } |
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|
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public int tryAcquireShared(int ignore) { |
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return isSignalled()? 1 : -1; |
66 |
} |
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|
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public boolean tryReleaseShared(int ignore) { |
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setState(1); |
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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 acquireExclusiveInterruptibly |
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*/ |
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class InterruptibleLockRunnable implements Runnable { |
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final Mutex lock; |
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InterruptibleLockRunnable(Mutex l) { lock = l; } |
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public void run() { |
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try { |
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lock.acquireExclusiveInterruptibly(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 acquireExclusiveInterruptibly that expects to be |
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* interrupted |
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*/ |
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class InterruptedLockRunnable implements Runnable { |
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final Mutex lock; |
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InterruptedLockRunnable(Mutex l) { lock = l; } |
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public void run() { |
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try { |
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lock.acquireExclusiveInterruptibly(1); |
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threadShouldThrow(); |
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} catch(InterruptedException success){} |
100 |
} |
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} |
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|
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/** |
104 |
* acquireExclusiveUninterruptiblying an releaseExclusiveed lock succeeds |
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*/ |
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public void testAcquireExclusiveUninterruptibly() { |
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Mutex rl = new Mutex(); |
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rl.acquireExclusiveUninterruptibly(1); |
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assertTrue(rl.isLocked()); |
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rl.releaseExclusive(1); |
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} |
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|
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/** |
114 |
* tryAcquireExclusive on an releaseExclusiveed lock succeeds |
115 |
*/ |
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public void testTryAcquireExclusive() { |
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Mutex rl = new Mutex(); |
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assertTrue(rl.tryAcquireExclusive(1)); |
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assertTrue(rl.isLocked()); |
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rl.releaseExclusive(1); |
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} |
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|
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/** |
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* hasQueuedThreads reports whether there are waiting threads |
125 |
*/ |
126 |
public void testhasQueuedThreads() { |
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final Mutex lock = new Mutex(); |
128 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
129 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
130 |
try { |
131 |
assertFalse(lock.hasQueuedThreads()); |
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lock.acquireExclusiveUninterruptibly(1); |
133 |
t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
138 |
assertTrue(lock.hasQueuedThreads()); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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lock.releaseExclusive(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(lock.hasQueuedThreads()); |
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t1.join(); |
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t2.join(); |
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} catch(Exception e){ |
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unexpectedException(); |
149 |
} |
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} |
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|
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/** |
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* isQueued(null) throws NPE |
154 |
*/ |
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public void testIsQueuedNPE() { |
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final Mutex lock = new Mutex(); |
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try { |
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lock.isQueued(null); |
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shouldThrow(); |
160 |
} catch (NullPointerException success) { |
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} |
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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() { |
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final Mutex lock = new Mutex(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
171 |
try { |
172 |
assertFalse(lock.isQueued(t1)); |
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assertFalse(lock.isQueued(t2)); |
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lock.acquireExclusiveUninterruptibly(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
177 |
assertTrue(lock.isQueued(t1)); |
178 |
t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
180 |
assertTrue(lock.isQueued(t1)); |
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assertTrue(lock.isQueued(t2)); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
184 |
assertFalse(lock.isQueued(t1)); |
185 |
assertTrue(lock.isQueued(t2)); |
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lock.releaseExclusive(1); |
187 |
Thread.sleep(SHORT_DELAY_MS); |
188 |
assertFalse(lock.isQueued(t1)); |
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assertFalse(lock.isQueued(t2)); |
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t1.join(); |
191 |
t2.join(); |
192 |
} catch(Exception e){ |
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unexpectedException(); |
194 |
} |
195 |
} |
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|
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/** |
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* getFirstQueuedThread returns first waiting thread or null is none |
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*/ |
200 |
public void testGetFirstQueuedThread() { |
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final Mutex lock = new Mutex(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
203 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
204 |
try { |
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assertNull(lock.getFirstQueuedThread()); |
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lock.acquireExclusiveUninterruptibly(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
209 |
assertEquals(t1, lock.getFirstQueuedThread()); |
210 |
t2.start(); |
211 |
Thread.sleep(SHORT_DELAY_MS); |
212 |
assertEquals(t1, lock.getFirstQueuedThread()); |
213 |
t1.interrupt(); |
214 |
Thread.sleep(SHORT_DELAY_MS); |
215 |
assertEquals(t2, lock.getFirstQueuedThread()); |
216 |
lock.releaseExclusive(1); |
217 |
Thread.sleep(SHORT_DELAY_MS); |
218 |
assertNull(lock.getFirstQueuedThread()); |
219 |
t1.join(); |
220 |
t2.join(); |
221 |
} catch(Exception e){ |
222 |
unexpectedException(); |
223 |
} |
224 |
} |
225 |
|
226 |
|
227 |
/** |
228 |
* hasContended reports false if no thread has ever blocked, else true |
229 |
*/ |
230 |
public void testHasContended() { |
231 |
final Mutex lock = new Mutex(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
234 |
try { |
235 |
assertFalse(lock.hasContended()); |
236 |
lock.acquireExclusiveUninterruptibly(1); |
237 |
t1.start(); |
238 |
Thread.sleep(SHORT_DELAY_MS); |
239 |
assertTrue(lock.hasContended()); |
240 |
t2.start(); |
241 |
Thread.sleep(SHORT_DELAY_MS); |
242 |
assertTrue(lock.hasContended()); |
243 |
t1.interrupt(); |
244 |
Thread.sleep(SHORT_DELAY_MS); |
245 |
assertTrue(lock.hasContended()); |
246 |
lock.releaseExclusive(1); |
247 |
Thread.sleep(SHORT_DELAY_MS); |
248 |
assertTrue(lock.hasContended()); |
249 |
t1.join(); |
250 |
t2.join(); |
251 |
} catch(Exception e){ |
252 |
unexpectedException(); |
253 |
} |
254 |
} |
255 |
|
256 |
/** |
257 |
* acquireExclusiveNanos is interruptible. |
258 |
*/ |
259 |
public void testInterruptedException2() { |
260 |
final Mutex lock = new Mutex(); |
261 |
lock.acquireExclusiveUninterruptibly(1); |
262 |
Thread t = new Thread(new Runnable() { |
263 |
public void run() { |
264 |
try { |
265 |
lock.acquireExclusiveNanos(1, MEDIUM_DELAY_MS * 1000 * 1000); |
266 |
threadShouldThrow(); |
267 |
} catch(InterruptedException success){} |
268 |
} |
269 |
}); |
270 |
try { |
271 |
t.start(); |
272 |
t.interrupt(); |
273 |
} catch(Exception e){ |
274 |
unexpectedException(); |
275 |
} |
276 |
} |
277 |
|
278 |
|
279 |
/** |
280 |
* TryAcquireExclusive on a locked lock fails |
281 |
*/ |
282 |
public void testTryAcquireExclusiveWhenLocked() { |
283 |
final Mutex lock = new Mutex(); |
284 |
lock.acquireExclusiveUninterruptibly(1); |
285 |
Thread t = new Thread(new Runnable() { |
286 |
public void run() { |
287 |
threadAssertFalse(lock.tryAcquireExclusive(1)); |
288 |
} |
289 |
}); |
290 |
try { |
291 |
t.start(); |
292 |
t.join(); |
293 |
lock.releaseExclusive(1); |
294 |
} catch(Exception e){ |
295 |
unexpectedException(); |
296 |
} |
297 |
} |
298 |
|
299 |
/** |
300 |
* acquireExclusiveNanos on a locked lock times out |
301 |
*/ |
302 |
public void testAcquireExclusiveNanos_Timeout() { |
303 |
final Mutex lock = new Mutex(); |
304 |
lock.acquireExclusiveUninterruptibly(1); |
305 |
Thread t = new Thread(new Runnable() { |
306 |
public void run() { |
307 |
try { |
308 |
threadAssertFalse(lock.acquireExclusiveNanos(1, 1000 * 1000)); |
309 |
} catch (Exception ex) { |
310 |
threadUnexpectedException(); |
311 |
} |
312 |
} |
313 |
}); |
314 |
try { |
315 |
t.start(); |
316 |
t.join(); |
317 |
lock.releaseExclusive(1); |
318 |
} catch(Exception e){ |
319 |
unexpectedException(); |
320 |
} |
321 |
} |
322 |
|
323 |
|
324 |
/** |
325 |
* getState is true when acquired and false when not |
326 |
*/ |
327 |
public void testGetState() { |
328 |
final Mutex lock = new Mutex(); |
329 |
lock.acquireExclusiveUninterruptibly(1); |
330 |
assertTrue(lock.isLocked()); |
331 |
lock.releaseExclusive(1); |
332 |
assertFalse(lock.isLocked()); |
333 |
Thread t = new Thread(new Runnable() { |
334 |
public void run() { |
335 |
lock.acquireExclusiveUninterruptibly(1); |
336 |
try { |
337 |
Thread.sleep(SMALL_DELAY_MS); |
338 |
} |
339 |
catch(Exception e) { |
340 |
threadUnexpectedException(); |
341 |
} |
342 |
lock.releaseExclusive(1); |
343 |
} |
344 |
}); |
345 |
try { |
346 |
t.start(); |
347 |
Thread.sleep(SHORT_DELAY_MS); |
348 |
assertTrue(lock.isLocked()); |
349 |
t.join(); |
350 |
assertFalse(lock.isLocked()); |
351 |
} catch(Exception e){ |
352 |
unexpectedException(); |
353 |
} |
354 |
} |
355 |
|
356 |
|
357 |
/** |
358 |
* acquireExclusiveInterruptibly is interruptible. |
359 |
*/ |
360 |
public void testAcquireInterruptibly1() { |
361 |
final Mutex lock = new Mutex(); |
362 |
lock.acquireExclusiveUninterruptibly(1); |
363 |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
364 |
try { |
365 |
t.start(); |
366 |
t.interrupt(); |
367 |
lock.releaseExclusive(1); |
368 |
t.join(); |
369 |
} catch(Exception e){ |
370 |
unexpectedException(); |
371 |
} |
372 |
} |
373 |
|
374 |
/** |
375 |
* acquireExclusiveInterruptibly succeeds when released, else is interruptible |
376 |
*/ |
377 |
public void testAcquireInterruptibly2() { |
378 |
final Mutex lock = new Mutex(); |
379 |
try { |
380 |
lock.acquireExclusiveInterruptibly(1); |
381 |
} catch(Exception e) { |
382 |
unexpectedException(); |
383 |
} |
384 |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
385 |
try { |
386 |
t.start(); |
387 |
t.interrupt(); |
388 |
assertTrue(lock.isLocked()); |
389 |
t.join(); |
390 |
} catch(Exception e){ |
391 |
unexpectedException(); |
392 |
} |
393 |
} |
394 |
|
395 |
/** |
396 |
* owns is true for a condition created by lock else false |
397 |
*/ |
398 |
public void testOwns() { |
399 |
final Mutex lock = new Mutex(); |
400 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
401 |
final Mutex lock2 = new Mutex(); |
402 |
assertTrue(lock.owns(c)); |
403 |
assertFalse(lock2.owns(c)); |
404 |
} |
405 |
|
406 |
/** |
407 |
* Calling await without holding lock throws IllegalMonitorStateException |
408 |
*/ |
409 |
public void testAwait_IllegalMonitor() { |
410 |
final Mutex lock = new Mutex(); |
411 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
412 |
try { |
413 |
c.await(); |
414 |
shouldThrow(); |
415 |
} |
416 |
catch (IllegalMonitorStateException success) { |
417 |
} |
418 |
catch (Exception ex) { |
419 |
unexpectedException(); |
420 |
} |
421 |
} |
422 |
|
423 |
/** |
424 |
* Calling signal without holding lock throws IllegalMonitorStateException |
425 |
*/ |
426 |
public void testSignal_IllegalMonitor() { |
427 |
final Mutex lock = new Mutex(); |
428 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
429 |
try { |
430 |
c.signal(); |
431 |
shouldThrow(); |
432 |
} |
433 |
catch (IllegalMonitorStateException success) { |
434 |
} |
435 |
catch (Exception ex) { |
436 |
unexpectedException(); |
437 |
} |
438 |
} |
439 |
|
440 |
/** |
441 |
* awaitNanos without a signal times out |
442 |
*/ |
443 |
public void testAwaitNanos_Timeout() { |
444 |
final Mutex lock = new Mutex(); |
445 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
446 |
try { |
447 |
lock.acquireExclusiveUninterruptibly(1); |
448 |
long t = c.awaitNanos(100); |
449 |
assertTrue(t <= 0); |
450 |
lock.releaseExclusive(1); |
451 |
} |
452 |
catch (Exception ex) { |
453 |
unexpectedException(); |
454 |
} |
455 |
} |
456 |
|
457 |
/** |
458 |
* timed await without a signal times out |
459 |
*/ |
460 |
public void testAwait_Timeout() { |
461 |
final Mutex lock = new Mutex(); |
462 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
463 |
try { |
464 |
lock.acquireExclusiveUninterruptibly(1); |
465 |
assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
466 |
lock.releaseExclusive(1); |
467 |
} |
468 |
catch (Exception ex) { |
469 |
unexpectedException(); |
470 |
} |
471 |
} |
472 |
|
473 |
/** |
474 |
* awaitUntil without a signal times out |
475 |
*/ |
476 |
public void testAwaitUntil_Timeout() { |
477 |
final Mutex lock = new Mutex(); |
478 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
479 |
try { |
480 |
lock.acquireExclusiveUninterruptibly(1); |
481 |
java.util.Date d = new java.util.Date(); |
482 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
483 |
lock.releaseExclusive(1); |
484 |
} |
485 |
catch (Exception ex) { |
486 |
unexpectedException(); |
487 |
} |
488 |
} |
489 |
|
490 |
/** |
491 |
* await returns when signalled |
492 |
*/ |
493 |
public void testAwait() { |
494 |
final Mutex lock = new Mutex(); |
495 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
496 |
Thread t = new Thread(new Runnable() { |
497 |
public void run() { |
498 |
try { |
499 |
lock.acquireExclusiveUninterruptibly(1); |
500 |
c.await(); |
501 |
lock.releaseExclusive(1); |
502 |
} |
503 |
catch(InterruptedException e) { |
504 |
threadUnexpectedException(); |
505 |
} |
506 |
} |
507 |
}); |
508 |
|
509 |
try { |
510 |
t.start(); |
511 |
Thread.sleep(SHORT_DELAY_MS); |
512 |
lock.acquireExclusiveUninterruptibly(1); |
513 |
c.signal(); |
514 |
lock.releaseExclusive(1); |
515 |
t.join(SHORT_DELAY_MS); |
516 |
assertFalse(t.isAlive()); |
517 |
} |
518 |
catch (Exception ex) { |
519 |
unexpectedException(); |
520 |
} |
521 |
} |
522 |
|
523 |
|
524 |
|
525 |
/** |
526 |
* hasWaiters throws NPE if null |
527 |
*/ |
528 |
public void testHasWaitersNPE() { |
529 |
final Mutex lock = new Mutex(); |
530 |
try { |
531 |
lock.hasWaiters(null); |
532 |
shouldThrow(); |
533 |
} catch (NullPointerException success) { |
534 |
} catch (Exception ex) { |
535 |
unexpectedException(); |
536 |
} |
537 |
} |
538 |
|
539 |
/** |
540 |
* getWaitQueueLength throws NPE if null |
541 |
*/ |
542 |
public void testGetWaitQueueLengthNPE() { |
543 |
final Mutex lock = new Mutex(); |
544 |
try { |
545 |
lock.getWaitQueueLength(null); |
546 |
shouldThrow(); |
547 |
} catch (NullPointerException success) { |
548 |
} catch (Exception ex) { |
549 |
unexpectedException(); |
550 |
} |
551 |
} |
552 |
|
553 |
|
554 |
/** |
555 |
* getWaitingThreads throws NPE if null |
556 |
*/ |
557 |
public void testGetWaitingThreadsNPE() { |
558 |
final Mutex lock = new Mutex(); |
559 |
try { |
560 |
lock.getWaitingThreads(null); |
561 |
shouldThrow(); |
562 |
} catch (NullPointerException success) { |
563 |
} catch (Exception ex) { |
564 |
unexpectedException(); |
565 |
} |
566 |
} |
567 |
|
568 |
|
569 |
/** |
570 |
* hasWaiters throws IAE if not owned |
571 |
*/ |
572 |
public void testHasWaitersIAE() { |
573 |
final Mutex lock = new Mutex(); |
574 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
575 |
final Mutex lock2 = new Mutex(); |
576 |
try { |
577 |
lock2.hasWaiters(c); |
578 |
shouldThrow(); |
579 |
} catch (IllegalArgumentException success) { |
580 |
} catch (Exception ex) { |
581 |
unexpectedException(); |
582 |
} |
583 |
} |
584 |
|
585 |
/** |
586 |
* hasWaiters throws IMSE if not locked |
587 |
*/ |
588 |
public void testHasWaitersIMSE() { |
589 |
final Mutex lock = new Mutex(); |
590 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
591 |
try { |
592 |
lock.hasWaiters(c); |
593 |
shouldThrow(); |
594 |
} catch (IllegalMonitorStateException success) { |
595 |
} catch (Exception ex) { |
596 |
unexpectedException(); |
597 |
} |
598 |
} |
599 |
|
600 |
|
601 |
/** |
602 |
* getWaitQueueLength throws IAE if not owned |
603 |
*/ |
604 |
public void testGetWaitQueueLengthIAE() { |
605 |
final Mutex lock = new Mutex(); |
606 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
607 |
final Mutex lock2 = new Mutex(); |
608 |
try { |
609 |
lock2.getWaitQueueLength(c); |
610 |
shouldThrow(); |
611 |
} catch (IllegalArgumentException success) { |
612 |
} catch (Exception ex) { |
613 |
unexpectedException(); |
614 |
} |
615 |
} |
616 |
|
617 |
/** |
618 |
* getWaitQueueLength throws IMSE if not locked |
619 |
*/ |
620 |
public void testGetWaitQueueLengthIMSE() { |
621 |
final Mutex lock = new Mutex(); |
622 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
623 |
try { |
624 |
lock.getWaitQueueLength(c); |
625 |
shouldThrow(); |
626 |
} catch (IllegalMonitorStateException success) { |
627 |
} catch (Exception ex) { |
628 |
unexpectedException(); |
629 |
} |
630 |
} |
631 |
|
632 |
|
633 |
/** |
634 |
* getWaitingThreads throws IAE if not owned |
635 |
*/ |
636 |
public void testGetWaitingThreadsIAE() { |
637 |
final Mutex lock = new Mutex(); |
638 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
639 |
final Mutex lock2 = new Mutex(); |
640 |
try { |
641 |
lock2.getWaitingThreads(c); |
642 |
shouldThrow(); |
643 |
} catch (IllegalArgumentException success) { |
644 |
} catch (Exception ex) { |
645 |
unexpectedException(); |
646 |
} |
647 |
} |
648 |
|
649 |
/** |
650 |
* getWaitingThreads throws IMSE if not locked |
651 |
*/ |
652 |
public void testGetWaitingThreadsIMSE() { |
653 |
final Mutex lock = new Mutex(); |
654 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
655 |
try { |
656 |
lock.getWaitingThreads(c); |
657 |
shouldThrow(); |
658 |
} catch (IllegalMonitorStateException success) { |
659 |
} catch (Exception ex) { |
660 |
unexpectedException(); |
661 |
} |
662 |
} |
663 |
|
664 |
|
665 |
|
666 |
/** |
667 |
* hasWaiters returns true when a thread is waiting, else false |
668 |
*/ |
669 |
public void testHasWaiters() { |
670 |
final Mutex lock = new Mutex(); |
671 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
672 |
Thread t = new Thread(new Runnable() { |
673 |
public void run() { |
674 |
try { |
675 |
lock.acquireExclusiveUninterruptibly(1); |
676 |
threadAssertFalse(lock.hasWaiters(c)); |
677 |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
678 |
c.await(); |
679 |
lock.releaseExclusive(1); |
680 |
} |
681 |
catch(InterruptedException e) { |
682 |
threadUnexpectedException(); |
683 |
} |
684 |
} |
685 |
}); |
686 |
|
687 |
try { |
688 |
t.start(); |
689 |
Thread.sleep(SHORT_DELAY_MS); |
690 |
lock.acquireExclusiveUninterruptibly(1); |
691 |
assertTrue(lock.hasWaiters(c)); |
692 |
assertEquals(1, lock.getWaitQueueLength(c)); |
693 |
c.signal(); |
694 |
lock.releaseExclusive(1); |
695 |
Thread.sleep(SHORT_DELAY_MS); |
696 |
lock.acquireExclusiveUninterruptibly(1); |
697 |
assertFalse(lock.hasWaiters(c)); |
698 |
assertEquals(0, lock.getWaitQueueLength(c)); |
699 |
lock.releaseExclusive(1); |
700 |
t.join(SHORT_DELAY_MS); |
701 |
assertFalse(t.isAlive()); |
702 |
} |
703 |
catch (Exception ex) { |
704 |
unexpectedException(); |
705 |
} |
706 |
} |
707 |
|
708 |
/** |
709 |
* getWaitQueueLength returns number of waiting threads |
710 |
*/ |
711 |
public void testGetWaitQueueLength() { |
712 |
final Mutex lock = new Mutex(); |
713 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
714 |
Thread t1 = new Thread(new Runnable() { |
715 |
public void run() { |
716 |
try { |
717 |
lock.acquireExclusiveUninterruptibly(1); |
718 |
threadAssertFalse(lock.hasWaiters(c)); |
719 |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
720 |
c.await(); |
721 |
lock.releaseExclusive(1); |
722 |
} |
723 |
catch(InterruptedException e) { |
724 |
threadUnexpectedException(); |
725 |
} |
726 |
} |
727 |
}); |
728 |
|
729 |
Thread t2 = new Thread(new Runnable() { |
730 |
public void run() { |
731 |
try { |
732 |
lock.acquireExclusiveUninterruptibly(1); |
733 |
threadAssertTrue(lock.hasWaiters(c)); |
734 |
threadAssertEquals(1, lock.getWaitQueueLength(c)); |
735 |
c.await(); |
736 |
lock.releaseExclusive(1); |
737 |
} |
738 |
catch(InterruptedException e) { |
739 |
threadUnexpectedException(); |
740 |
} |
741 |
} |
742 |
}); |
743 |
|
744 |
try { |
745 |
t1.start(); |
746 |
Thread.sleep(SHORT_DELAY_MS); |
747 |
t2.start(); |
748 |
Thread.sleep(SHORT_DELAY_MS); |
749 |
lock.acquireExclusiveUninterruptibly(1); |
750 |
assertTrue(lock.hasWaiters(c)); |
751 |
assertEquals(2, lock.getWaitQueueLength(c)); |
752 |
c.signalAll(); |
753 |
lock.releaseExclusive(1); |
754 |
Thread.sleep(SHORT_DELAY_MS); |
755 |
lock.acquireExclusiveUninterruptibly(1); |
756 |
assertFalse(lock.hasWaiters(c)); |
757 |
assertEquals(0, lock.getWaitQueueLength(c)); |
758 |
lock.releaseExclusive(1); |
759 |
t1.join(SHORT_DELAY_MS); |
760 |
t2.join(SHORT_DELAY_MS); |
761 |
assertFalse(t1.isAlive()); |
762 |
assertFalse(t2.isAlive()); |
763 |
} |
764 |
catch (Exception ex) { |
765 |
unexpectedException(); |
766 |
} |
767 |
} |
768 |
|
769 |
/** |
770 |
* getWaitingThreads returns only and all waiting threads |
771 |
*/ |
772 |
public void testGetWaitingThreads() { |
773 |
final Mutex lock = new Mutex(); |
774 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
775 |
Thread t1 = new Thread(new Runnable() { |
776 |
public void run() { |
777 |
try { |
778 |
lock.acquireExclusiveUninterruptibly(1); |
779 |
threadAssertTrue(lock.getWaitingThreads(c).isEmpty()); |
780 |
c.await(); |
781 |
lock.releaseExclusive(1); |
782 |
} |
783 |
catch(InterruptedException e) { |
784 |
threadUnexpectedException(); |
785 |
} |
786 |
} |
787 |
}); |
788 |
|
789 |
Thread t2 = new Thread(new Runnable() { |
790 |
public void run() { |
791 |
try { |
792 |
lock.acquireExclusiveUninterruptibly(1); |
793 |
threadAssertFalse(lock.getWaitingThreads(c).isEmpty()); |
794 |
c.await(); |
795 |
lock.releaseExclusive(1); |
796 |
} |
797 |
catch(InterruptedException e) { |
798 |
threadUnexpectedException(); |
799 |
} |
800 |
} |
801 |
}); |
802 |
|
803 |
try { |
804 |
lock.acquireExclusiveUninterruptibly(1); |
805 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
806 |
lock.releaseExclusive(1); |
807 |
t1.start(); |
808 |
Thread.sleep(SHORT_DELAY_MS); |
809 |
t2.start(); |
810 |
Thread.sleep(SHORT_DELAY_MS); |
811 |
lock.acquireExclusiveUninterruptibly(1); |
812 |
assertTrue(lock.hasWaiters(c)); |
813 |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
814 |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
815 |
c.signalAll(); |
816 |
lock.releaseExclusive(1); |
817 |
Thread.sleep(SHORT_DELAY_MS); |
818 |
lock.acquireExclusiveUninterruptibly(1); |
819 |
assertFalse(lock.hasWaiters(c)); |
820 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
821 |
lock.releaseExclusive(1); |
822 |
t1.join(SHORT_DELAY_MS); |
823 |
t2.join(SHORT_DELAY_MS); |
824 |
assertFalse(t1.isAlive()); |
825 |
assertFalse(t2.isAlive()); |
826 |
} |
827 |
catch (Exception ex) { |
828 |
unexpectedException(); |
829 |
} |
830 |
} |
831 |
|
832 |
|
833 |
|
834 |
/** |
835 |
* awaitUninterruptibly doesn't abort on interrupt |
836 |
*/ |
837 |
public void testAwaitUninterruptibly() { |
838 |
final Mutex lock = new Mutex(); |
839 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
840 |
Thread t = new Thread(new Runnable() { |
841 |
public void run() { |
842 |
lock.acquireExclusiveUninterruptibly(1); |
843 |
c.awaitUninterruptibly(); |
844 |
lock.releaseExclusive(1); |
845 |
} |
846 |
}); |
847 |
|
848 |
try { |
849 |
t.start(); |
850 |
Thread.sleep(SHORT_DELAY_MS); |
851 |
t.interrupt(); |
852 |
lock.acquireExclusiveUninterruptibly(1); |
853 |
c.signal(); |
854 |
lock.releaseExclusive(1); |
855 |
assert(t.isInterrupted()); |
856 |
t.join(SHORT_DELAY_MS); |
857 |
assertFalse(t.isAlive()); |
858 |
} |
859 |
catch (Exception ex) { |
860 |
unexpectedException(); |
861 |
} |
862 |
} |
863 |
|
864 |
/** |
865 |
* await is interruptible |
866 |
*/ |
867 |
public void testAwait_Interrupt() { |
868 |
final Mutex lock = new Mutex(); |
869 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
870 |
Thread t = new Thread(new Runnable() { |
871 |
public void run() { |
872 |
try { |
873 |
lock.acquireExclusiveUninterruptibly(1); |
874 |
c.await(); |
875 |
lock.releaseExclusive(1); |
876 |
threadShouldThrow(); |
877 |
} |
878 |
catch(InterruptedException success) { |
879 |
} |
880 |
} |
881 |
}); |
882 |
|
883 |
try { |
884 |
t.start(); |
885 |
Thread.sleep(SHORT_DELAY_MS); |
886 |
t.interrupt(); |
887 |
t.join(SHORT_DELAY_MS); |
888 |
assertFalse(t.isAlive()); |
889 |
} |
890 |
catch (Exception ex) { |
891 |
unexpectedException(); |
892 |
} |
893 |
} |
894 |
|
895 |
/** |
896 |
* awaitNanos is interruptible |
897 |
*/ |
898 |
public void testAwaitNanos_Interrupt() { |
899 |
final Mutex lock = new Mutex(); |
900 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
901 |
Thread t = new Thread(new Runnable() { |
902 |
public void run() { |
903 |
try { |
904 |
lock.acquireExclusiveUninterruptibly(1); |
905 |
c.awaitNanos(1000 * 1000 * 1000); // 1 sec |
906 |
lock.releaseExclusive(1); |
907 |
threadShouldThrow(); |
908 |
} |
909 |
catch(InterruptedException success) { |
910 |
} |
911 |
} |
912 |
}); |
913 |
|
914 |
try { |
915 |
t.start(); |
916 |
Thread.sleep(SHORT_DELAY_MS); |
917 |
t.interrupt(); |
918 |
t.join(SHORT_DELAY_MS); |
919 |
assertFalse(t.isAlive()); |
920 |
} |
921 |
catch (Exception ex) { |
922 |
unexpectedException(); |
923 |
} |
924 |
} |
925 |
|
926 |
/** |
927 |
* awaitUntil is interruptible |
928 |
*/ |
929 |
public void testAwaitUntil_Interrupt() { |
930 |
final Mutex lock = new Mutex(); |
931 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
932 |
Thread t = new Thread(new Runnable() { |
933 |
public void run() { |
934 |
try { |
935 |
lock.acquireExclusiveUninterruptibly(1); |
936 |
java.util.Date d = new java.util.Date(); |
937 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
938 |
lock.releaseExclusive(1); |
939 |
threadShouldThrow(); |
940 |
} |
941 |
catch(InterruptedException success) { |
942 |
} |
943 |
} |
944 |
}); |
945 |
|
946 |
try { |
947 |
t.start(); |
948 |
Thread.sleep(SHORT_DELAY_MS); |
949 |
t.interrupt(); |
950 |
t.join(SHORT_DELAY_MS); |
951 |
assertFalse(t.isAlive()); |
952 |
} |
953 |
catch (Exception ex) { |
954 |
unexpectedException(); |
955 |
} |
956 |
} |
957 |
|
958 |
/** |
959 |
* signalAll wakes up all threads |
960 |
*/ |
961 |
public void testSignalAll() { |
962 |
final Mutex lock = new Mutex(); |
963 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
964 |
Thread t1 = new Thread(new Runnable() { |
965 |
public void run() { |
966 |
try { |
967 |
lock.acquireExclusiveUninterruptibly(1); |
968 |
c.await(); |
969 |
lock.releaseExclusive(1); |
970 |
} |
971 |
catch(InterruptedException e) { |
972 |
threadUnexpectedException(); |
973 |
} |
974 |
} |
975 |
}); |
976 |
|
977 |
Thread t2 = new Thread(new Runnable() { |
978 |
public void run() { |
979 |
try { |
980 |
lock.acquireExclusiveUninterruptibly(1); |
981 |
c.await(); |
982 |
lock.releaseExclusive(1); |
983 |
} |
984 |
catch(InterruptedException e) { |
985 |
threadUnexpectedException(); |
986 |
} |
987 |
} |
988 |
}); |
989 |
|
990 |
try { |
991 |
t1.start(); |
992 |
t2.start(); |
993 |
Thread.sleep(SHORT_DELAY_MS); |
994 |
lock.acquireExclusiveUninterruptibly(1); |
995 |
c.signalAll(); |
996 |
lock.releaseExclusive(1); |
997 |
t1.join(SHORT_DELAY_MS); |
998 |
t2.join(SHORT_DELAY_MS); |
999 |
assertFalse(t1.isAlive()); |
1000 |
assertFalse(t2.isAlive()); |
1001 |
} |
1002 |
catch (Exception ex) { |
1003 |
unexpectedException(); |
1004 |
} |
1005 |
} |
1006 |
|
1007 |
|
1008 |
/** |
1009 |
* toString indicates current state |
1010 |
*/ |
1011 |
public void testToString() { |
1012 |
Mutex lock = new Mutex(); |
1013 |
String us = lock.toString(); |
1014 |
assertTrue(us.indexOf("State = 0") >= 0); |
1015 |
lock.acquireExclusiveUninterruptibly(1); |
1016 |
String ls = lock.toString(); |
1017 |
assertTrue(ls.indexOf("State = 1") >= 0); |
1018 |
} |
1019 |
|
1020 |
/** |
1021 |
* A serialized AQS deserializes with current state |
1022 |
*/ |
1023 |
public void testSerialization() { |
1024 |
Mutex l = new Mutex(); |
1025 |
l.acquireExclusiveUninterruptibly(1); |
1026 |
assertTrue(l.isLocked()); |
1027 |
|
1028 |
try { |
1029 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
1030 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
1031 |
out.writeObject(l); |
1032 |
out.close(); |
1033 |
|
1034 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
1035 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
1036 |
Mutex r = (Mutex) in.readObject(); |
1037 |
assertTrue(r.isLocked()); |
1038 |
} catch(Exception e){ |
1039 |
e.printStackTrace(); |
1040 |
unexpectedException(); |
1041 |
} |
1042 |
} |
1043 |
|
1044 |
|
1045 |
/** |
1046 |
* tryReleaseShared setting state changes getState |
1047 |
*/ |
1048 |
public void testGetStateWithReleaseShared() { |
1049 |
final BooleanLatch l = new BooleanLatch(); |
1050 |
assertFalse(l.isSignalled()); |
1051 |
l.releaseShared(0); |
1052 |
assertTrue(l.isSignalled()); |
1053 |
} |
1054 |
|
1055 |
/** |
1056 |
* release and has no effect when already signalled |
1057 |
*/ |
1058 |
public void testReleaseShared() { |
1059 |
final BooleanLatch l = new BooleanLatch(); |
1060 |
assertFalse(l.isSignalled()); |
1061 |
l.releaseShared(0); |
1062 |
assertTrue(l.isSignalled()); |
1063 |
l.releaseShared(0); |
1064 |
assertTrue(l.isSignalled()); |
1065 |
} |
1066 |
|
1067 |
/** |
1068 |
* acquireSharedInterruptibly returns after release, but not before |
1069 |
*/ |
1070 |
public void testAcquireSharedInterruptibly() { |
1071 |
final BooleanLatch l = new BooleanLatch(); |
1072 |
|
1073 |
Thread t = new Thread(new Runnable() { |
1074 |
public void run() { |
1075 |
try { |
1076 |
threadAssertFalse(l.isSignalled()); |
1077 |
l.acquireSharedInterruptibly(0); |
1078 |
threadAssertTrue(l.isSignalled()); |
1079 |
} catch(InterruptedException e){ |
1080 |
threadUnexpectedException(); |
1081 |
} |
1082 |
} |
1083 |
}); |
1084 |
try { |
1085 |
t.start(); |
1086 |
assertFalse(l.isSignalled()); |
1087 |
Thread.sleep(SHORT_DELAY_MS); |
1088 |
l.releaseShared(0); |
1089 |
assertTrue(l.isSignalled()); |
1090 |
t.join(); |
1091 |
} catch (InterruptedException e){ |
1092 |
unexpectedException(); |
1093 |
} |
1094 |
} |
1095 |
|
1096 |
|
1097 |
/** |
1098 |
* acquireSharedTimed returns after release |
1099 |
*/ |
1100 |
public void testAsquireSharedTimed() { |
1101 |
final BooleanLatch l = new BooleanLatch(); |
1102 |
|
1103 |
Thread t = new Thread(new Runnable() { |
1104 |
public void run() { |
1105 |
try { |
1106 |
threadAssertFalse(l.isSignalled()); |
1107 |
threadAssertTrue(l.acquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000)); |
1108 |
threadAssertTrue(l.isSignalled()); |
1109 |
|
1110 |
} catch(InterruptedException e){ |
1111 |
threadUnexpectedException(); |
1112 |
} |
1113 |
} |
1114 |
}); |
1115 |
try { |
1116 |
t.start(); |
1117 |
assertFalse(l.isSignalled()); |
1118 |
Thread.sleep(SHORT_DELAY_MS); |
1119 |
l.releaseShared(0); |
1120 |
assertTrue(l.isSignalled()); |
1121 |
t.join(); |
1122 |
} catch (InterruptedException e){ |
1123 |
unexpectedException(); |
1124 |
} |
1125 |
} |
1126 |
|
1127 |
/** |
1128 |
* acquireSharedInterruptibly throws IE if interrupted before released |
1129 |
*/ |
1130 |
public void testAcquireSharedInterruptibly_InterruptedException() { |
1131 |
final BooleanLatch l = new BooleanLatch(); |
1132 |
Thread t = new Thread(new Runnable() { |
1133 |
public void run() { |
1134 |
try { |
1135 |
threadAssertFalse(l.isSignalled()); |
1136 |
l.acquireSharedInterruptibly(0); |
1137 |
threadShouldThrow(); |
1138 |
} catch(InterruptedException success){} |
1139 |
} |
1140 |
}); |
1141 |
t.start(); |
1142 |
try { |
1143 |
assertFalse(l.isSignalled()); |
1144 |
t.interrupt(); |
1145 |
t.join(); |
1146 |
} catch (InterruptedException e){ |
1147 |
unexpectedException(); |
1148 |
} |
1149 |
} |
1150 |
|
1151 |
/** |
1152 |
* acquireSharedTimed throws IE if interrupted before released |
1153 |
*/ |
1154 |
public void testAcquireSharedNanos_InterruptedException() { |
1155 |
final BooleanLatch l = new BooleanLatch(); |
1156 |
Thread t = new Thread(new Runnable() { |
1157 |
public void run() { |
1158 |
try { |
1159 |
threadAssertFalse(l.isSignalled()); |
1160 |
l.acquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000); |
1161 |
threadShouldThrow(); |
1162 |
} catch(InterruptedException success){} |
1163 |
} |
1164 |
}); |
1165 |
t.start(); |
1166 |
try { |
1167 |
Thread.sleep(SHORT_DELAY_MS); |
1168 |
assertFalse(l.isSignalled()); |
1169 |
t.interrupt(); |
1170 |
t.join(); |
1171 |
} catch (InterruptedException e){ |
1172 |
unexpectedException(); |
1173 |
} |
1174 |
} |
1175 |
|
1176 |
/** |
1177 |
* acquireSharedTimed times out if not released before timeout |
1178 |
*/ |
1179 |
public void testAcquireSharedNanos_Timeout() { |
1180 |
final BooleanLatch l = new BooleanLatch(); |
1181 |
Thread t = new Thread(new Runnable() { |
1182 |
public void run() { |
1183 |
try { |
1184 |
threadAssertFalse(l.isSignalled()); |
1185 |
threadAssertFalse(l.acquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000)); |
1186 |
} catch(InterruptedException ie){ |
1187 |
threadUnexpectedException(); |
1188 |
} |
1189 |
} |
1190 |
}); |
1191 |
t.start(); |
1192 |
try { |
1193 |
Thread.sleep(SHORT_DELAY_MS); |
1194 |
assertFalse(l.isSignalled()); |
1195 |
t.join(); |
1196 |
} catch (InterruptedException e){ |
1197 |
unexpectedException(); |
1198 |
} |
1199 |
} |
1200 |
|
1201 |
|
1202 |
} |