3 |
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* with assistance from members of JCP JSR-166 Expert Group and |
4 |
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* released to the public domain, as explained at |
5 |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
6 |
– |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
7 |
– |
* Pat Fisher, Mike Judd. |
6 |
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*/ |
7 |
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|
8 |
< |
import junit.framework.*; |
9 |
< |
import java.util.concurrent.atomic.AtomicBoolean; |
10 |
< |
import java.util.concurrent.locks.Condition; |
8 |
> |
import static java.util.concurrent.TimeUnit.DAYS; |
9 |
> |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
10 |
> |
|
11 |
> |
import java.util.ArrayList; |
12 |
> |
import java.util.List; |
13 |
> |
import java.util.concurrent.CountDownLatch; |
14 |
> |
import java.util.concurrent.Future; |
15 |
> |
import java.util.concurrent.TimeUnit; |
16 |
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import java.util.concurrent.locks.Lock; |
14 |
– |
import java.util.concurrent.locks.ReadWriteLock; |
17 |
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import java.util.concurrent.locks.StampedLock; |
18 |
< |
import java.util.concurrent.CountDownLatch; |
19 |
< |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
20 |
< |
import java.util.*; |
18 |
> |
import java.util.function.BiConsumer; |
19 |
> |
import java.util.function.Function; |
20 |
> |
|
21 |
> |
import junit.framework.Test; |
22 |
> |
import junit.framework.TestSuite; |
23 |
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|
24 |
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public class StampedLockTest extends JSR166TestCase { |
25 |
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public static void main(String[] args) { |
26 |
< |
junit.textui.TestRunner.run(suite()); |
26 |
> |
main(suite(), args); |
27 |
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} |
28 |
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public static Test suite() { |
29 |
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return new TestSuite(StampedLockTest.class); |
30 |
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} |
31 |
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|
32 |
< |
// XXXX Just a skeleton implementation for now. |
33 |
< |
public void testTODO() { |
34 |
< |
fail("Please add some real tests!"); |
35 |
< |
} |
36 |
< |
|
37 |
< |
public void testConstructor() { new StampedLock(); } |
38 |
< |
|
39 |
< |
// /** |
40 |
< |
// * A runnable calling lockInterruptibly |
41 |
< |
// */ |
42 |
< |
// class InterruptibleLockRunnable extends CheckedRunnable { |
43 |
< |
// final ReentrantReadWriteLock lock; |
44 |
< |
// InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
45 |
< |
// public void realRun() throws InterruptedException { |
46 |
< |
// lock.writeLock().lockInterruptibly(); |
47 |
< |
// } |
48 |
< |
// } |
49 |
< |
|
50 |
< |
// /** |
51 |
< |
// * A runnable calling lockInterruptibly that expects to be |
52 |
< |
// * interrupted |
53 |
< |
// */ |
54 |
< |
// class InterruptedLockRunnable extends CheckedInterruptedRunnable { |
55 |
< |
// final ReentrantReadWriteLock lock; |
56 |
< |
// InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
57 |
< |
// public void realRun() throws InterruptedException { |
58 |
< |
// lock.writeLock().lockInterruptibly(); |
59 |
< |
// } |
60 |
< |
// } |
61 |
< |
|
62 |
< |
// /** |
63 |
< |
// * Subclass to expose protected methods |
64 |
< |
// */ |
65 |
< |
// static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock { |
66 |
< |
// PublicReentrantReadWriteLock() { super(); } |
67 |
< |
// PublicReentrantReadWriteLock(boolean fair) { super(fair); } |
68 |
< |
// public Thread getOwner() { |
69 |
< |
// return super.getOwner(); |
70 |
< |
// } |
71 |
< |
// public Collection<Thread> getQueuedThreads() { |
72 |
< |
// return super.getQueuedThreads(); |
73 |
< |
// } |
74 |
< |
// public Collection<Thread> getWaitingThreads(Condition c) { |
75 |
< |
// return super.getWaitingThreads(c); |
76 |
< |
// } |
77 |
< |
// } |
78 |
< |
|
79 |
< |
// /** |
80 |
< |
// * Releases write lock, checking that it had a hold count of 1. |
81 |
< |
// */ |
82 |
< |
// void releaseWriteLock(PublicReentrantReadWriteLock lock) { |
83 |
< |
// ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock(); |
84 |
< |
// assertWriteLockedByMoi(lock); |
85 |
< |
// assertEquals(1, lock.getWriteHoldCount()); |
86 |
< |
// writeLock.unlock(); |
87 |
< |
// assertNotWriteLocked(lock); |
88 |
< |
// } |
89 |
< |
|
90 |
< |
// /** |
91 |
< |
// * Spin-waits until lock.hasQueuedThread(t) becomes true. |
92 |
< |
// */ |
93 |
< |
// void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) { |
94 |
< |
// long startTime = System.nanoTime(); |
95 |
< |
// while (!lock.hasQueuedThread(t)) { |
96 |
< |
// if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
97 |
< |
// throw new AssertionFailedError("timed out"); |
98 |
< |
// Thread.yield(); |
99 |
< |
// } |
100 |
< |
// assertTrue(t.isAlive()); |
101 |
< |
// assertTrue(lock.getOwner() != t); |
102 |
< |
// } |
103 |
< |
|
104 |
< |
// /** |
105 |
< |
// * Checks that lock is not write-locked. |
106 |
< |
// */ |
107 |
< |
// void assertNotWriteLocked(PublicReentrantReadWriteLock lock) { |
108 |
< |
// assertFalse(lock.isWriteLocked()); |
109 |
< |
// assertFalse(lock.isWriteLockedByCurrentThread()); |
110 |
< |
// assertFalse(lock.writeLock().isHeldByCurrentThread()); |
111 |
< |
// assertEquals(0, lock.getWriteHoldCount()); |
112 |
< |
// assertEquals(0, lock.writeLock().getHoldCount()); |
113 |
< |
// assertNull(lock.getOwner()); |
114 |
< |
// } |
115 |
< |
|
116 |
< |
// /** |
117 |
< |
// * Checks that lock is write-locked by the given thread. |
118 |
< |
// */ |
119 |
< |
// void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) { |
120 |
< |
// assertTrue(lock.isWriteLocked()); |
121 |
< |
// assertSame(t, lock.getOwner()); |
122 |
< |
// assertEquals(t == Thread.currentThread(), |
123 |
< |
// lock.isWriteLockedByCurrentThread()); |
124 |
< |
// assertEquals(t == Thread.currentThread(), |
125 |
< |
// lock.writeLock().isHeldByCurrentThread()); |
126 |
< |
// assertEquals(t == Thread.currentThread(), |
127 |
< |
// lock.getWriteHoldCount() > 0); |
128 |
< |
// assertEquals(t == Thread.currentThread(), |
129 |
< |
// lock.writeLock().getHoldCount() > 0); |
130 |
< |
// assertEquals(0, lock.getReadLockCount()); |
131 |
< |
// } |
132 |
< |
|
133 |
< |
// /** |
134 |
< |
// * Checks that lock is write-locked by the current thread. |
135 |
< |
// */ |
136 |
< |
// void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) { |
137 |
< |
// assertWriteLockedBy(lock, Thread.currentThread()); |
138 |
< |
// } |
139 |
< |
|
140 |
< |
// /** |
141 |
< |
// * Checks that condition c has no waiters. |
142 |
< |
// */ |
143 |
< |
// void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) { |
144 |
< |
// assertHasWaiters(lock, c, new Thread[] {}); |
145 |
< |
// } |
146 |
< |
|
147 |
< |
// /** |
148 |
< |
// * Checks that condition c has exactly the given waiter threads. |
149 |
< |
// */ |
150 |
< |
// void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c, |
151 |
< |
// Thread... threads) { |
152 |
< |
// lock.writeLock().lock(); |
153 |
< |
// assertEquals(threads.length > 0, lock.hasWaiters(c)); |
154 |
< |
// assertEquals(threads.length, lock.getWaitQueueLength(c)); |
155 |
< |
// assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty()); |
156 |
< |
// assertEquals(threads.length, lock.getWaitingThreads(c).size()); |
157 |
< |
// assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)), |
158 |
< |
// new HashSet<Thread>(Arrays.asList(threads))); |
159 |
< |
// lock.writeLock().unlock(); |
160 |
< |
// } |
161 |
< |
|
162 |
< |
// enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }; |
163 |
< |
|
164 |
< |
// /** |
165 |
< |
// * Awaits condition using the specified AwaitMethod. |
166 |
< |
// */ |
167 |
< |
// void await(Condition c, AwaitMethod awaitMethod) |
168 |
< |
// throws InterruptedException { |
169 |
< |
// switch (awaitMethod) { |
170 |
< |
// case await: |
171 |
< |
// c.await(); |
172 |
< |
// break; |
173 |
< |
// case awaitTimed: |
174 |
< |
// assertTrue(c.await(2 * LONG_DELAY_MS, MILLISECONDS)); |
175 |
< |
// break; |
176 |
< |
// case awaitNanos: |
177 |
< |
// long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS)); |
178 |
< |
// assertTrue(nanosRemaining > 0); |
179 |
< |
// break; |
180 |
< |
// case awaitUntil: |
181 |
< |
// java.util.Date d = new java.util.Date(); |
182 |
< |
// assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS))); |
183 |
< |
// break; |
184 |
< |
// } |
185 |
< |
// } |
186 |
< |
|
187 |
< |
// /** |
188 |
< |
// * Constructor sets given fairness, and is in unlocked state |
189 |
< |
// */ |
190 |
< |
// public void testConstructor() { |
191 |
< |
// PublicReentrantReadWriteLock lock; |
192 |
< |
|
193 |
< |
// lock = new PublicReentrantReadWriteLock(); |
194 |
< |
// assertFalse(lock.isFair()); |
195 |
< |
// assertNotWriteLocked(lock); |
196 |
< |
// assertEquals(0, lock.getReadLockCount()); |
197 |
< |
|
198 |
< |
// lock = new PublicReentrantReadWriteLock(true); |
199 |
< |
// assertTrue(lock.isFair()); |
200 |
< |
// assertNotWriteLocked(lock); |
201 |
< |
// assertEquals(0, lock.getReadLockCount()); |
202 |
< |
|
203 |
< |
// lock = new PublicReentrantReadWriteLock(false); |
204 |
< |
// assertFalse(lock.isFair()); |
205 |
< |
// assertNotWriteLocked(lock); |
206 |
< |
// assertEquals(0, lock.getReadLockCount()); |
207 |
< |
// } |
208 |
< |
|
209 |
< |
// /** |
210 |
< |
// * write-locking and read-locking an unlocked lock succeed |
211 |
< |
// */ |
212 |
< |
// public void testLock() { testLock(false); } |
213 |
< |
// public void testLock_fair() { testLock(true); } |
214 |
< |
// public void testLock(boolean fair) { |
215 |
< |
// PublicReentrantReadWriteLock lock = |
216 |
< |
// new PublicReentrantReadWriteLock(fair); |
217 |
< |
// assertNotWriteLocked(lock); |
218 |
< |
// lock.writeLock().lock(); |
219 |
< |
// assertWriteLockedByMoi(lock); |
220 |
< |
// lock.writeLock().unlock(); |
221 |
< |
// assertNotWriteLocked(lock); |
222 |
< |
// assertEquals(0, lock.getReadLockCount()); |
223 |
< |
// lock.readLock().lock(); |
224 |
< |
// assertNotWriteLocked(lock); |
225 |
< |
// assertEquals(1, lock.getReadLockCount()); |
226 |
< |
// lock.readLock().unlock(); |
227 |
< |
// assertNotWriteLocked(lock); |
228 |
< |
// assertEquals(0, lock.getReadLockCount()); |
229 |
< |
// } |
230 |
< |
|
231 |
< |
// /** |
232 |
< |
// * getWriteHoldCount returns number of recursive holds |
233 |
< |
// */ |
234 |
< |
// public void testGetWriteHoldCount() { testGetWriteHoldCount(false); } |
235 |
< |
// public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); } |
236 |
< |
// public void testGetWriteHoldCount(boolean fair) { |
237 |
< |
// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
238 |
< |
// for (int i = 1; i <= SIZE; i++) { |
239 |
< |
// lock.writeLock().lock(); |
240 |
< |
// assertEquals(i,lock.getWriteHoldCount()); |
241 |
< |
// } |
242 |
< |
// for (int i = SIZE; i > 0; i--) { |
243 |
< |
// lock.writeLock().unlock(); |
244 |
< |
// assertEquals(i-1,lock.getWriteHoldCount()); |
245 |
< |
// } |
246 |
< |
// } |
247 |
< |
|
248 |
< |
// /** |
249 |
< |
// * writelock.getHoldCount returns number of recursive holds |
250 |
< |
// */ |
251 |
< |
// public void testGetHoldCount() { testGetHoldCount(false); } |
252 |
< |
// public void testGetHoldCount_fair() { testGetHoldCount(true); } |
253 |
< |
// public void testGetHoldCount(boolean fair) { |
254 |
< |
// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
255 |
< |
// for (int i = 1; i <= SIZE; i++) { |
256 |
< |
// lock.writeLock().lock(); |
257 |
< |
// assertEquals(i,lock.writeLock().getHoldCount()); |
258 |
< |
// } |
259 |
< |
// for (int i = SIZE; i > 0; i--) { |
260 |
< |
// lock.writeLock().unlock(); |
261 |
< |
// assertEquals(i-1,lock.writeLock().getHoldCount()); |
262 |
< |
// } |
263 |
< |
// } |
264 |
< |
|
265 |
< |
// /** |
266 |
< |
// * getReadHoldCount returns number of recursive holds |
267 |
< |
// */ |
268 |
< |
// public void testGetReadHoldCount() { testGetReadHoldCount(false); } |
269 |
< |
// public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); } |
270 |
< |
// public void testGetReadHoldCount(boolean fair) { |
271 |
< |
// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
272 |
< |
// for (int i = 1; i <= SIZE; i++) { |
273 |
< |
// lock.readLock().lock(); |
274 |
< |
// assertEquals(i,lock.getReadHoldCount()); |
275 |
< |
// } |
276 |
< |
// for (int i = SIZE; i > 0; i--) { |
277 |
< |
// lock.readLock().unlock(); |
278 |
< |
// assertEquals(i-1,lock.getReadHoldCount()); |
279 |
< |
// } |
280 |
< |
// } |
281 |
< |
|
282 |
< |
// /** |
283 |
< |
// * write-unlocking an unlocked lock throws IllegalMonitorStateException |
284 |
< |
// */ |
285 |
< |
// public void testWriteUnlock_IMSE() { testWriteUnlock_IMSE(false); } |
286 |
< |
// public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); } |
287 |
< |
// public void testWriteUnlock_IMSE(boolean fair) { |
288 |
< |
// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
289 |
< |
// try { |
290 |
< |
// lock.writeLock().unlock(); |
291 |
< |
// shouldThrow(); |
292 |
< |
// } catch (IllegalMonitorStateException success) {} |
293 |
< |
// } |
294 |
< |
|
295 |
< |
// /** |
296 |
< |
// * read-unlocking an unlocked lock throws IllegalMonitorStateException |
297 |
< |
// */ |
298 |
< |
// public void testReadUnlock_IMSE() { testReadUnlock_IMSE(false); } |
299 |
< |
// public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); } |
300 |
< |
// public void testReadUnlock_IMSE(boolean fair) { |
301 |
< |
// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
302 |
< |
// try { |
303 |
< |
// lock.readLock().unlock(); |
304 |
< |
// shouldThrow(); |
305 |
< |
// } catch (IllegalMonitorStateException success) {} |
306 |
< |
// } |
307 |
< |
|
308 |
< |
// /** |
309 |
< |
// * write-lockInterruptibly is interruptible |
310 |
< |
// */ |
311 |
< |
// public void testWriteLockInterruptibly_Interruptible() { testWriteLockInterruptibly_Interruptible(false); } |
312 |
< |
// public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); } |
313 |
< |
// public void testWriteLockInterruptibly_Interruptible(boolean fair) { |
314 |
< |
// final PublicReentrantReadWriteLock lock = |
315 |
< |
// new PublicReentrantReadWriteLock(fair); |
316 |
< |
// lock.writeLock().lock(); |
317 |
< |
// Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
318 |
< |
// public void realRun() throws InterruptedException { |
319 |
< |
// lock.writeLock().lockInterruptibly(); |
320 |
< |
// }}); |
321 |
< |
|
322 |
< |
// waitForQueuedThread(lock, t); |
323 |
< |
// t.interrupt(); |
324 |
< |
// awaitTermination(t); |
325 |
< |
// releaseWriteLock(lock); |
326 |
< |
// } |
327 |
< |
|
328 |
< |
// /** |
329 |
< |
// * timed write-tryLock is interruptible |
330 |
< |
// */ |
331 |
< |
// public void testWriteTryLock_Interruptible() { testWriteTryLock_Interruptible(false); } |
332 |
< |
// public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); } |
333 |
< |
// public void testWriteTryLock_Interruptible(boolean fair) { |
334 |
< |
// final PublicReentrantReadWriteLock lock = |
335 |
< |
// new PublicReentrantReadWriteLock(fair); |
336 |
< |
// lock.writeLock().lock(); |
337 |
< |
// Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
338 |
< |
// public void realRun() throws InterruptedException { |
339 |
< |
// lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS); |
340 |
< |
// }}); |
341 |
< |
|
342 |
< |
// waitForQueuedThread(lock, t); |
343 |
< |
// t.interrupt(); |
344 |
< |
// awaitTermination(t); |
345 |
< |
// releaseWriteLock(lock); |
346 |
< |
// } |
347 |
< |
|
348 |
< |
// /** |
349 |
< |
// * read-lockInterruptibly is interruptible |
350 |
< |
// */ |
351 |
< |
// public void testReadLockInterruptibly_Interruptible() { testReadLockInterruptibly_Interruptible(false); } |
352 |
< |
// public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); } |
353 |
< |
// public void testReadLockInterruptibly_Interruptible(boolean fair) { |
354 |
< |
// final PublicReentrantReadWriteLock lock = |
355 |
< |
// new PublicReentrantReadWriteLock(fair); |
356 |
< |
// lock.writeLock().lock(); |
357 |
< |
// Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
358 |
< |
// public void realRun() throws InterruptedException { |
359 |
< |
// lock.readLock().lockInterruptibly(); |
360 |
< |
// }}); |
361 |
< |
|
362 |
< |
// waitForQueuedThread(lock, t); |
363 |
< |
// t.interrupt(); |
364 |
< |
// awaitTermination(t); |
365 |
< |
// releaseWriteLock(lock); |
366 |
< |
// } |
367 |
< |
|
368 |
< |
// /** |
369 |
< |
// * timed read-tryLock is interruptible |
370 |
< |
// */ |
371 |
< |
// public void testReadTryLock_Interruptible() { testReadTryLock_Interruptible(false); } |
372 |
< |
// public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); } |
373 |
< |
// public void testReadTryLock_Interruptible(boolean fair) { |
374 |
< |
// final PublicReentrantReadWriteLock lock = |
375 |
< |
// new PublicReentrantReadWriteLock(fair); |
376 |
< |
// lock.writeLock().lock(); |
377 |
< |
// Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
378 |
< |
// public void realRun() throws InterruptedException { |
379 |
< |
// lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS); |
380 |
< |
// }}); |
381 |
< |
|
382 |
< |
// waitForQueuedThread(lock, t); |
383 |
< |
// t.interrupt(); |
384 |
< |
// awaitTermination(t); |
385 |
< |
// releaseWriteLock(lock); |
386 |
< |
// } |
387 |
< |
|
388 |
< |
// /** |
389 |
< |
// * write-tryLock on an unlocked lock succeeds |
390 |
< |
// */ |
391 |
< |
// public void testWriteTryLock() { testWriteTryLock(false); } |
392 |
< |
// public void testWriteTryLock_fair() { testWriteTryLock(true); } |
393 |
< |
// public void testWriteTryLock(boolean fair) { |
394 |
< |
// final PublicReentrantReadWriteLock lock = |
395 |
< |
// new PublicReentrantReadWriteLock(fair); |
396 |
< |
// assertTrue(lock.writeLock().tryLock()); |
397 |
< |
// assertWriteLockedByMoi(lock); |
398 |
< |
// assertTrue(lock.writeLock().tryLock()); |
399 |
< |
// assertWriteLockedByMoi(lock); |
400 |
< |
// lock.writeLock().unlock(); |
401 |
< |
// releaseWriteLock(lock); |
402 |
< |
// } |
403 |
< |
|
404 |
< |
// /** |
405 |
< |
// * write-tryLock fails if locked |
406 |
< |
// */ |
407 |
< |
// public void testWriteTryLockWhenLocked() { testWriteTryLockWhenLocked(false); } |
408 |
< |
// public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); } |
409 |
< |
// public void testWriteTryLockWhenLocked(boolean fair) { |
410 |
< |
// final PublicReentrantReadWriteLock lock = |
411 |
< |
// new PublicReentrantReadWriteLock(fair); |
412 |
< |
// lock.writeLock().lock(); |
413 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
414 |
< |
// public void realRun() { |
415 |
< |
// assertFalse(lock.writeLock().tryLock()); |
416 |
< |
// }}); |
417 |
< |
|
418 |
< |
// awaitTermination(t); |
419 |
< |
// releaseWriteLock(lock); |
420 |
< |
// } |
421 |
< |
|
422 |
< |
// /** |
423 |
< |
// * read-tryLock fails if locked |
424 |
< |
// */ |
425 |
< |
// public void testReadTryLockWhenLocked() { testReadTryLockWhenLocked(false); } |
426 |
< |
// public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); } |
427 |
< |
// public void testReadTryLockWhenLocked(boolean fair) { |
428 |
< |
// final PublicReentrantReadWriteLock lock = |
429 |
< |
// new PublicReentrantReadWriteLock(fair); |
430 |
< |
// lock.writeLock().lock(); |
431 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
432 |
< |
// public void realRun() { |
433 |
< |
// assertFalse(lock.readLock().tryLock()); |
434 |
< |
// }}); |
435 |
< |
|
436 |
< |
// awaitTermination(t); |
437 |
< |
// releaseWriteLock(lock); |
438 |
< |
// } |
439 |
< |
|
440 |
< |
// /** |
441 |
< |
// * Multiple threads can hold a read lock when not write-locked |
442 |
< |
// */ |
443 |
< |
// public void testMultipleReadLocks() { testMultipleReadLocks(false); } |
444 |
< |
// public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); } |
445 |
< |
// public void testMultipleReadLocks(boolean fair) { |
446 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
447 |
< |
// lock.readLock().lock(); |
448 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
449 |
< |
// public void realRun() throws InterruptedException { |
450 |
< |
// assertTrue(lock.readLock().tryLock()); |
451 |
< |
// lock.readLock().unlock(); |
452 |
< |
// assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS)); |
453 |
< |
// lock.readLock().unlock(); |
454 |
< |
// lock.readLock().lock(); |
455 |
< |
// lock.readLock().unlock(); |
456 |
< |
// }}); |
457 |
< |
|
458 |
< |
// awaitTermination(t); |
459 |
< |
// lock.readLock().unlock(); |
460 |
< |
// } |
461 |
< |
|
462 |
< |
// /** |
463 |
< |
// * A writelock succeeds only after a reading thread unlocks |
464 |
< |
// */ |
465 |
< |
// public void testWriteAfterReadLock() { testWriteAfterReadLock(false); } |
466 |
< |
// public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); } |
467 |
< |
// public void testWriteAfterReadLock(boolean fair) { |
468 |
< |
// final PublicReentrantReadWriteLock lock = |
469 |
< |
// new PublicReentrantReadWriteLock(fair); |
470 |
< |
// lock.readLock().lock(); |
471 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
472 |
< |
// public void realRun() { |
473 |
< |
// assertEquals(1, lock.getReadLockCount()); |
474 |
< |
// lock.writeLock().lock(); |
475 |
< |
// assertEquals(0, lock.getReadLockCount()); |
476 |
< |
// lock.writeLock().unlock(); |
477 |
< |
// }}); |
474 |
< |
// waitForQueuedThread(lock, t); |
475 |
< |
// assertNotWriteLocked(lock); |
476 |
< |
// assertEquals(1, lock.getReadLockCount()); |
477 |
< |
// lock.readLock().unlock(); |
478 |
< |
// assertEquals(0, lock.getReadLockCount()); |
479 |
< |
// awaitTermination(t); |
480 |
< |
// assertNotWriteLocked(lock); |
481 |
< |
// } |
482 |
< |
|
483 |
< |
// /** |
484 |
< |
// * A writelock succeeds only after reading threads unlock |
485 |
< |
// */ |
486 |
< |
// public void testWriteAfterMultipleReadLocks() { testWriteAfterMultipleReadLocks(false); } |
487 |
< |
// public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); } |
488 |
< |
// public void testWriteAfterMultipleReadLocks(boolean fair) { |
489 |
< |
// final PublicReentrantReadWriteLock lock = |
490 |
< |
// new PublicReentrantReadWriteLock(fair); |
491 |
< |
// lock.readLock().lock(); |
492 |
< |
// lock.readLock().lock(); |
493 |
< |
// Thread t1 = newStartedThread(new CheckedRunnable() { |
494 |
< |
// public void realRun() { |
495 |
< |
// lock.readLock().lock(); |
496 |
< |
// assertEquals(3, lock.getReadLockCount()); |
497 |
< |
// lock.readLock().unlock(); |
498 |
< |
// }}); |
499 |
< |
// awaitTermination(t1); |
500 |
< |
|
501 |
< |
// Thread t2 = newStartedThread(new CheckedRunnable() { |
502 |
< |
// public void realRun() { |
503 |
< |
// assertEquals(2, lock.getReadLockCount()); |
504 |
< |
// lock.writeLock().lock(); |
505 |
< |
// assertEquals(0, lock.getReadLockCount()); |
506 |
< |
// lock.writeLock().unlock(); |
507 |
< |
// }}); |
508 |
< |
// waitForQueuedThread(lock, t2); |
509 |
< |
// assertNotWriteLocked(lock); |
510 |
< |
// assertEquals(2, lock.getReadLockCount()); |
511 |
< |
// lock.readLock().unlock(); |
512 |
< |
// lock.readLock().unlock(); |
513 |
< |
// assertEquals(0, lock.getReadLockCount()); |
514 |
< |
// awaitTermination(t2); |
515 |
< |
// assertNotWriteLocked(lock); |
516 |
< |
// } |
517 |
< |
|
518 |
< |
// /** |
519 |
< |
// * A thread that tries to acquire a fair read lock (non-reentrantly) |
520 |
< |
// * will block if there is a waiting writer thread |
521 |
< |
// */ |
522 |
< |
// public void testReaderWriterReaderFairFifo() { |
523 |
< |
// final PublicReentrantReadWriteLock lock = |
524 |
< |
// new PublicReentrantReadWriteLock(true); |
525 |
< |
// final AtomicBoolean t1GotLock = new AtomicBoolean(false); |
526 |
< |
|
527 |
< |
// lock.readLock().lock(); |
528 |
< |
// Thread t1 = newStartedThread(new CheckedRunnable() { |
529 |
< |
// public void realRun() { |
530 |
< |
// assertEquals(1, lock.getReadLockCount()); |
531 |
< |
// lock.writeLock().lock(); |
532 |
< |
// assertEquals(0, lock.getReadLockCount()); |
533 |
< |
// t1GotLock.set(true); |
534 |
< |
// lock.writeLock().unlock(); |
535 |
< |
// }}); |
536 |
< |
// waitForQueuedThread(lock, t1); |
537 |
< |
|
538 |
< |
// Thread t2 = newStartedThread(new CheckedRunnable() { |
539 |
< |
// public void realRun() { |
540 |
< |
// assertEquals(1, lock.getReadLockCount()); |
541 |
< |
// lock.readLock().lock(); |
542 |
< |
// assertEquals(1, lock.getReadLockCount()); |
543 |
< |
// assertTrue(t1GotLock.get()); |
544 |
< |
// lock.readLock().unlock(); |
545 |
< |
// }}); |
546 |
< |
// waitForQueuedThread(lock, t2); |
547 |
< |
// assertTrue(t1.isAlive()); |
548 |
< |
// assertNotWriteLocked(lock); |
549 |
< |
// assertEquals(1, lock.getReadLockCount()); |
550 |
< |
// lock.readLock().unlock(); |
551 |
< |
// awaitTermination(t1); |
552 |
< |
// awaitTermination(t2); |
553 |
< |
// assertNotWriteLocked(lock); |
554 |
< |
// } |
555 |
< |
|
556 |
< |
// /** |
557 |
< |
// * Readlocks succeed only after a writing thread unlocks |
558 |
< |
// */ |
559 |
< |
// public void testReadAfterWriteLock() { testReadAfterWriteLock(false); } |
560 |
< |
// public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); } |
561 |
< |
// public void testReadAfterWriteLock(boolean fair) { |
562 |
< |
// final PublicReentrantReadWriteLock lock = |
563 |
< |
// new PublicReentrantReadWriteLock(fair); |
564 |
< |
// lock.writeLock().lock(); |
565 |
< |
// Thread t1 = newStartedThread(new CheckedRunnable() { |
566 |
< |
// public void realRun() { |
567 |
< |
// lock.readLock().lock(); |
568 |
< |
// lock.readLock().unlock(); |
569 |
< |
// }}); |
570 |
< |
// Thread t2 = newStartedThread(new CheckedRunnable() { |
571 |
< |
// public void realRun() { |
572 |
< |
// lock.readLock().lock(); |
573 |
< |
// lock.readLock().unlock(); |
574 |
< |
// }}); |
575 |
< |
|
576 |
< |
// waitForQueuedThread(lock, t1); |
577 |
< |
// waitForQueuedThread(lock, t2); |
578 |
< |
// releaseWriteLock(lock); |
579 |
< |
// awaitTermination(t1); |
580 |
< |
// awaitTermination(t2); |
581 |
< |
// } |
582 |
< |
|
583 |
< |
// /** |
584 |
< |
// * Read trylock succeeds if write locked by current thread |
585 |
< |
// */ |
586 |
< |
// public void testReadHoldingWriteLock() { testReadHoldingWriteLock(false); } |
587 |
< |
// public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); } |
588 |
< |
// public void testReadHoldingWriteLock(boolean fair) { |
589 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
590 |
< |
// lock.writeLock().lock(); |
591 |
< |
// assertTrue(lock.readLock().tryLock()); |
592 |
< |
// lock.readLock().unlock(); |
593 |
< |
// lock.writeLock().unlock(); |
594 |
< |
// } |
595 |
< |
|
596 |
< |
// /** |
597 |
< |
// * Read trylock succeeds (barging) even in the presence of waiting |
598 |
< |
// * readers and/or writers |
599 |
< |
// */ |
600 |
< |
// public void testReadTryLockBarging() { testReadTryLockBarging(false); } |
601 |
< |
// public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); } |
602 |
< |
// public void testReadTryLockBarging(boolean fair) { |
603 |
< |
// final PublicReentrantReadWriteLock lock = |
604 |
< |
// new PublicReentrantReadWriteLock(fair); |
605 |
< |
// lock.readLock().lock(); |
606 |
< |
|
607 |
< |
// Thread t1 = newStartedThread(new CheckedRunnable() { |
608 |
< |
// public void realRun() { |
609 |
< |
// lock.writeLock().lock(); |
610 |
< |
// lock.writeLock().unlock(); |
611 |
< |
// }}); |
612 |
< |
|
613 |
< |
// waitForQueuedThread(lock, t1); |
614 |
< |
|
615 |
< |
// Thread t2 = newStartedThread(new CheckedRunnable() { |
616 |
< |
// public void realRun() { |
617 |
< |
// lock.readLock().lock(); |
618 |
< |
// lock.readLock().unlock(); |
619 |
< |
// }}); |
620 |
< |
|
621 |
< |
// if (fair) |
622 |
< |
// waitForQueuedThread(lock, t2); |
623 |
< |
|
624 |
< |
// Thread t3 = newStartedThread(new CheckedRunnable() { |
625 |
< |
// public void realRun() { |
626 |
< |
// lock.readLock().tryLock(); |
627 |
< |
// lock.readLock().unlock(); |
628 |
< |
// }}); |
629 |
< |
|
630 |
< |
// assertTrue(lock.getReadLockCount() > 0); |
631 |
< |
// awaitTermination(t3); |
632 |
< |
// assertTrue(t1.isAlive()); |
633 |
< |
// if (fair) assertTrue(t2.isAlive()); |
634 |
< |
// lock.readLock().unlock(); |
635 |
< |
// awaitTermination(t1); |
636 |
< |
// awaitTermination(t2); |
637 |
< |
// } |
638 |
< |
|
639 |
< |
// /** |
640 |
< |
// * Read lock succeeds if write locked by current thread even if |
641 |
< |
// * other threads are waiting for readlock |
642 |
< |
// */ |
643 |
< |
// public void testReadHoldingWriteLock2() { testReadHoldingWriteLock2(false); } |
644 |
< |
// public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); } |
645 |
< |
// public void testReadHoldingWriteLock2(boolean fair) { |
646 |
< |
// final PublicReentrantReadWriteLock lock = |
647 |
< |
// new PublicReentrantReadWriteLock(fair); |
648 |
< |
// lock.writeLock().lock(); |
649 |
< |
// lock.readLock().lock(); |
650 |
< |
// lock.readLock().unlock(); |
651 |
< |
|
652 |
< |
// Thread t1 = newStartedThread(new CheckedRunnable() { |
653 |
< |
// public void realRun() { |
654 |
< |
// lock.readLock().lock(); |
655 |
< |
// lock.readLock().unlock(); |
656 |
< |
// }}); |
657 |
< |
// Thread t2 = newStartedThread(new CheckedRunnable() { |
658 |
< |
// public void realRun() { |
659 |
< |
// lock.readLock().lock(); |
660 |
< |
// lock.readLock().unlock(); |
661 |
< |
// }}); |
662 |
< |
|
663 |
< |
// waitForQueuedThread(lock, t1); |
664 |
< |
// waitForQueuedThread(lock, t2); |
665 |
< |
// assertWriteLockedByMoi(lock); |
666 |
< |
// lock.readLock().lock(); |
667 |
< |
// lock.readLock().unlock(); |
668 |
< |
// releaseWriteLock(lock); |
669 |
< |
// awaitTermination(t1); |
670 |
< |
// awaitTermination(t2); |
671 |
< |
// } |
672 |
< |
|
673 |
< |
// /** |
674 |
< |
// * Read lock succeeds if write locked by current thread even if |
675 |
< |
// * other threads are waiting for writelock |
676 |
< |
// */ |
677 |
< |
// public void testReadHoldingWriteLock3() { testReadHoldingWriteLock3(false); } |
678 |
< |
// public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); } |
679 |
< |
// public void testReadHoldingWriteLock3(boolean fair) { |
680 |
< |
// final PublicReentrantReadWriteLock lock = |
681 |
< |
// new PublicReentrantReadWriteLock(fair); |
682 |
< |
// lock.writeLock().lock(); |
683 |
< |
// lock.readLock().lock(); |
684 |
< |
// lock.readLock().unlock(); |
685 |
< |
|
686 |
< |
// Thread t1 = newStartedThread(new CheckedRunnable() { |
687 |
< |
// public void realRun() { |
688 |
< |
// lock.writeLock().lock(); |
689 |
< |
// lock.writeLock().unlock(); |
690 |
< |
// }}); |
691 |
< |
// Thread t2 = newStartedThread(new CheckedRunnable() { |
692 |
< |
// public void realRun() { |
693 |
< |
// lock.writeLock().lock(); |
694 |
< |
// lock.writeLock().unlock(); |
695 |
< |
// }}); |
696 |
< |
|
697 |
< |
// waitForQueuedThread(lock, t1); |
698 |
< |
// waitForQueuedThread(lock, t2); |
699 |
< |
// assertWriteLockedByMoi(lock); |
700 |
< |
// lock.readLock().lock(); |
701 |
< |
// lock.readLock().unlock(); |
702 |
< |
// assertWriteLockedByMoi(lock); |
703 |
< |
// lock.writeLock().unlock(); |
704 |
< |
// awaitTermination(t1); |
705 |
< |
// awaitTermination(t2); |
706 |
< |
// } |
707 |
< |
|
708 |
< |
// /** |
709 |
< |
// * Write lock succeeds if write locked by current thread even if |
710 |
< |
// * other threads are waiting for writelock |
711 |
< |
// */ |
712 |
< |
// public void testWriteHoldingWriteLock4() { testWriteHoldingWriteLock4(false); } |
713 |
< |
// public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); } |
714 |
< |
// public void testWriteHoldingWriteLock4(boolean fair) { |
715 |
< |
// final PublicReentrantReadWriteLock lock = |
716 |
< |
// new PublicReentrantReadWriteLock(fair); |
717 |
< |
// lock.writeLock().lock(); |
718 |
< |
// lock.writeLock().lock(); |
719 |
< |
// lock.writeLock().unlock(); |
720 |
< |
|
721 |
< |
// Thread t1 = newStartedThread(new CheckedRunnable() { |
722 |
< |
// public void realRun() { |
723 |
< |
// lock.writeLock().lock(); |
724 |
< |
// lock.writeLock().unlock(); |
725 |
< |
// }}); |
726 |
< |
// Thread t2 = newStartedThread(new CheckedRunnable() { |
727 |
< |
// public void realRun() { |
728 |
< |
// lock.writeLock().lock(); |
729 |
< |
// lock.writeLock().unlock(); |
730 |
< |
// }}); |
731 |
< |
|
732 |
< |
// waitForQueuedThread(lock, t1); |
733 |
< |
// waitForQueuedThread(lock, t2); |
734 |
< |
// assertWriteLockedByMoi(lock); |
735 |
< |
// assertEquals(1, lock.getWriteHoldCount()); |
736 |
< |
// lock.writeLock().lock(); |
737 |
< |
// assertWriteLockedByMoi(lock); |
738 |
< |
// assertEquals(2, lock.getWriteHoldCount()); |
739 |
< |
// lock.writeLock().unlock(); |
740 |
< |
// assertWriteLockedByMoi(lock); |
741 |
< |
// assertEquals(1, lock.getWriteHoldCount()); |
742 |
< |
// lock.writeLock().unlock(); |
743 |
< |
// awaitTermination(t1); |
744 |
< |
// awaitTermination(t2); |
745 |
< |
// } |
746 |
< |
|
747 |
< |
// /** |
748 |
< |
// * Read tryLock succeeds if readlocked but not writelocked |
749 |
< |
// */ |
750 |
< |
// public void testTryLockWhenReadLocked() { testTryLockWhenReadLocked(false); } |
751 |
< |
// public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); } |
752 |
< |
// public void testTryLockWhenReadLocked(boolean fair) { |
753 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
754 |
< |
// lock.readLock().lock(); |
755 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
756 |
< |
// public void realRun() { |
757 |
< |
// assertTrue(lock.readLock().tryLock()); |
758 |
< |
// lock.readLock().unlock(); |
759 |
< |
// }}); |
760 |
< |
|
761 |
< |
// awaitTermination(t); |
762 |
< |
// lock.readLock().unlock(); |
763 |
< |
// } |
764 |
< |
|
765 |
< |
// /** |
766 |
< |
// * write tryLock fails when readlocked |
767 |
< |
// */ |
768 |
< |
// public void testWriteTryLockWhenReadLocked() { testWriteTryLockWhenReadLocked(false); } |
769 |
< |
// public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); } |
770 |
< |
// public void testWriteTryLockWhenReadLocked(boolean fair) { |
771 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
772 |
< |
// lock.readLock().lock(); |
773 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
774 |
< |
// public void realRun() { |
775 |
< |
// assertFalse(lock.writeLock().tryLock()); |
776 |
< |
// }}); |
777 |
< |
|
778 |
< |
// awaitTermination(t); |
779 |
< |
// lock.readLock().unlock(); |
780 |
< |
// } |
781 |
< |
|
782 |
< |
// /** |
783 |
< |
// * write timed tryLock times out if locked |
784 |
< |
// */ |
785 |
< |
// public void testWriteTryLock_Timeout() { testWriteTryLock_Timeout(false); } |
786 |
< |
// public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); } |
787 |
< |
// public void testWriteTryLock_Timeout(boolean fair) { |
788 |
< |
// final PublicReentrantReadWriteLock lock = |
789 |
< |
// new PublicReentrantReadWriteLock(fair); |
790 |
< |
// lock.writeLock().lock(); |
791 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
792 |
< |
// public void realRun() throws InterruptedException { |
793 |
< |
// long startTime = System.nanoTime(); |
794 |
< |
// long timeoutMillis = 10; |
795 |
< |
// assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS)); |
796 |
< |
// assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
797 |
< |
// }}); |
798 |
< |
|
799 |
< |
// awaitTermination(t); |
800 |
< |
// releaseWriteLock(lock); |
801 |
< |
// } |
802 |
< |
|
803 |
< |
// /** |
804 |
< |
// * read timed tryLock times out if write-locked |
805 |
< |
// */ |
806 |
< |
// public void testReadTryLock_Timeout() { testReadTryLock_Timeout(false); } |
807 |
< |
// public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); } |
808 |
< |
// public void testReadTryLock_Timeout(boolean fair) { |
809 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
810 |
< |
// lock.writeLock().lock(); |
811 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
812 |
< |
// public void realRun() throws InterruptedException { |
813 |
< |
// long startTime = System.nanoTime(); |
814 |
< |
// long timeoutMillis = 10; |
815 |
< |
// assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS)); |
816 |
< |
// assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
817 |
< |
// }}); |
818 |
< |
|
819 |
< |
// awaitTermination(t); |
820 |
< |
// assertTrue(lock.writeLock().isHeldByCurrentThread()); |
821 |
< |
// lock.writeLock().unlock(); |
822 |
< |
// } |
823 |
< |
|
824 |
< |
// /** |
825 |
< |
// * write lockInterruptibly succeeds if unlocked, else is interruptible |
826 |
< |
// */ |
827 |
< |
// public void testWriteLockInterruptibly() { testWriteLockInterruptibly(false); } |
828 |
< |
// public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); } |
829 |
< |
// public void testWriteLockInterruptibly(boolean fair) { |
830 |
< |
// final PublicReentrantReadWriteLock lock = |
831 |
< |
// new PublicReentrantReadWriteLock(fair); |
832 |
< |
// try { |
833 |
< |
// lock.writeLock().lockInterruptibly(); |
834 |
< |
// } catch (InterruptedException ie) { |
835 |
< |
// threadUnexpectedException(ie); |
836 |
< |
// } |
837 |
< |
// Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
838 |
< |
// public void realRun() throws InterruptedException { |
839 |
< |
// lock.writeLock().lockInterruptibly(); |
840 |
< |
// }}); |
841 |
< |
|
842 |
< |
// waitForQueuedThread(lock, t); |
843 |
< |
// t.interrupt(); |
844 |
< |
// assertTrue(lock.writeLock().isHeldByCurrentThread()); |
845 |
< |
// awaitTermination(t); |
846 |
< |
// releaseWriteLock(lock); |
847 |
< |
// } |
848 |
< |
|
849 |
< |
// /** |
850 |
< |
// * read lockInterruptibly succeeds if lock free else is interruptible |
851 |
< |
// */ |
852 |
< |
// public void testReadLockInterruptibly() { testReadLockInterruptibly(false); } |
853 |
< |
// public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); } |
854 |
< |
// public void testReadLockInterruptibly(boolean fair) { |
855 |
< |
// final PublicReentrantReadWriteLock lock = |
856 |
< |
// new PublicReentrantReadWriteLock(fair); |
857 |
< |
// try { |
858 |
< |
// lock.readLock().lockInterruptibly(); |
859 |
< |
// lock.readLock().unlock(); |
860 |
< |
// lock.writeLock().lockInterruptibly(); |
861 |
< |
// } catch (InterruptedException ie) { |
862 |
< |
// threadUnexpectedException(ie); |
863 |
< |
// } |
864 |
< |
// Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
865 |
< |
// public void realRun() throws InterruptedException { |
866 |
< |
// lock.readLock().lockInterruptibly(); |
867 |
< |
// }}); |
868 |
< |
|
869 |
< |
// waitForQueuedThread(lock, t); |
870 |
< |
// t.interrupt(); |
871 |
< |
// awaitTermination(t); |
872 |
< |
// releaseWriteLock(lock); |
873 |
< |
// } |
874 |
< |
|
875 |
< |
// /** |
876 |
< |
// * Calling await without holding lock throws IllegalMonitorStateException |
877 |
< |
// */ |
878 |
< |
// public void testAwait_IMSE() { testAwait_IMSE(false); } |
879 |
< |
// public void testAwait_IMSE_fair() { testAwait_IMSE(true); } |
880 |
< |
// public void testAwait_IMSE(boolean fair) { |
881 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
882 |
< |
// final Condition c = lock.writeLock().newCondition(); |
883 |
< |
// for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
884 |
< |
// long startTime = System.nanoTime(); |
885 |
< |
// try { |
886 |
< |
// await(c, awaitMethod); |
887 |
< |
// shouldThrow(); |
888 |
< |
// } catch (IllegalMonitorStateException success) { |
889 |
< |
// } catch (InterruptedException e) { threadUnexpectedException(e); } |
890 |
< |
// assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
891 |
< |
// } |
892 |
< |
// } |
893 |
< |
|
894 |
< |
// /** |
895 |
< |
// * Calling signal without holding lock throws IllegalMonitorStateException |
896 |
< |
// */ |
897 |
< |
// public void testSignal_IMSE() { testSignal_IMSE(false); } |
898 |
< |
// public void testSignal_IMSE_fair() { testSignal_IMSE(true); } |
899 |
< |
// public void testSignal_IMSE(boolean fair) { |
900 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
901 |
< |
// final Condition c = lock.writeLock().newCondition(); |
902 |
< |
// try { |
903 |
< |
// c.signal(); |
904 |
< |
// shouldThrow(); |
905 |
< |
// } catch (IllegalMonitorStateException success) {} |
906 |
< |
// } |
907 |
< |
|
908 |
< |
// /** |
909 |
< |
// * Calling signalAll without holding lock throws IllegalMonitorStateException |
910 |
< |
// */ |
911 |
< |
// public void testSignalAll_IMSE() { testSignalAll_IMSE(false); } |
912 |
< |
// public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); } |
913 |
< |
// public void testSignalAll_IMSE(boolean fair) { |
914 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
915 |
< |
// final Condition c = lock.writeLock().newCondition(); |
916 |
< |
// try { |
917 |
< |
// c.signalAll(); |
918 |
< |
// shouldThrow(); |
919 |
< |
// } catch (IllegalMonitorStateException success) {} |
920 |
< |
// } |
921 |
< |
|
922 |
< |
// /** |
923 |
< |
// * awaitNanos without a signal times out |
924 |
< |
// */ |
925 |
< |
// public void testAwaitNanos_Timeout() { testAwaitNanos_Timeout(false); } |
926 |
< |
// public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); } |
927 |
< |
// public void testAwaitNanos_Timeout(boolean fair) { |
928 |
< |
// try { |
929 |
< |
// final ReentrantReadWriteLock lock = |
930 |
< |
// new ReentrantReadWriteLock(fair); |
931 |
< |
// final Condition c = lock.writeLock().newCondition(); |
932 |
< |
// lock.writeLock().lock(); |
933 |
< |
// long startTime = System.nanoTime(); |
934 |
< |
// long timeoutMillis = 10; |
935 |
< |
// long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
936 |
< |
// long nanosRemaining = c.awaitNanos(timeoutNanos); |
937 |
< |
// assertTrue(nanosRemaining <= 0); |
938 |
< |
// assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
939 |
< |
// lock.writeLock().unlock(); |
940 |
< |
// } catch (InterruptedException e) { |
941 |
< |
// threadUnexpectedException(e); |
942 |
< |
// } |
943 |
< |
// } |
944 |
< |
|
945 |
< |
// /** |
946 |
< |
// * timed await without a signal times out |
947 |
< |
// */ |
948 |
< |
// public void testAwait_Timeout() { testAwait_Timeout(false); } |
949 |
< |
// public void testAwait_Timeout_fair() { testAwait_Timeout(true); } |
950 |
< |
// public void testAwait_Timeout(boolean fair) { |
951 |
< |
// try { |
952 |
< |
// final ReentrantReadWriteLock lock = |
953 |
< |
// new ReentrantReadWriteLock(fair); |
954 |
< |
// final Condition c = lock.writeLock().newCondition(); |
955 |
< |
// lock.writeLock().lock(); |
956 |
< |
// long startTime = System.nanoTime(); |
957 |
< |
// long timeoutMillis = 10; |
958 |
< |
// assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
959 |
< |
// assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
960 |
< |
// lock.writeLock().unlock(); |
961 |
< |
// } catch (InterruptedException e) { |
962 |
< |
// threadUnexpectedException(e); |
963 |
< |
// } |
964 |
< |
// } |
965 |
< |
|
966 |
< |
// /** |
967 |
< |
// * awaitUntil without a signal times out |
968 |
< |
// */ |
969 |
< |
// public void testAwaitUntil_Timeout() { testAwaitUntil_Timeout(false); } |
970 |
< |
// public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); } |
971 |
< |
// public void testAwaitUntil_Timeout(boolean fair) { |
972 |
< |
// try { |
973 |
< |
// final ReentrantReadWriteLock lock = |
974 |
< |
// new ReentrantReadWriteLock(fair); |
975 |
< |
// final Condition c = lock.writeLock().newCondition(); |
976 |
< |
// lock.writeLock().lock(); |
977 |
< |
// long startTime = System.nanoTime(); |
978 |
< |
// long timeoutMillis = 10; |
979 |
< |
// java.util.Date d = new java.util.Date(); |
980 |
< |
// assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis))); |
981 |
< |
// assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
982 |
< |
// lock.writeLock().unlock(); |
983 |
< |
// } catch (InterruptedException e) { |
984 |
< |
// threadUnexpectedException(e); |
985 |
< |
// } |
986 |
< |
// } |
987 |
< |
|
988 |
< |
// /** |
989 |
< |
// * await returns when signalled |
990 |
< |
// */ |
991 |
< |
// public void testAwait() { testAwait(false); } |
992 |
< |
// public void testAwait_fair() { testAwait(true); } |
993 |
< |
// public void testAwait(boolean fair) { |
994 |
< |
// final PublicReentrantReadWriteLock lock = |
995 |
< |
// new PublicReentrantReadWriteLock(fair); |
996 |
< |
// final Condition c = lock.writeLock().newCondition(); |
997 |
< |
// final CountDownLatch locked = new CountDownLatch(1); |
998 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
999 |
< |
// public void realRun() throws InterruptedException { |
1000 |
< |
// lock.writeLock().lock(); |
1001 |
< |
// locked.countDown(); |
1002 |
< |
// c.await(); |
1003 |
< |
// lock.writeLock().unlock(); |
1004 |
< |
// }}); |
1005 |
< |
|
1006 |
< |
// await(locked); |
1007 |
< |
// lock.writeLock().lock(); |
1008 |
< |
// assertHasWaiters(lock, c, t); |
1009 |
< |
// c.signal(); |
1010 |
< |
// assertHasNoWaiters(lock, c); |
1011 |
< |
// assertTrue(t.isAlive()); |
1012 |
< |
// lock.writeLock().unlock(); |
1013 |
< |
// awaitTermination(t); |
1014 |
< |
// } |
1015 |
< |
|
1016 |
< |
// /** |
1017 |
< |
// * awaitUninterruptibly is uninterruptible |
1018 |
< |
// */ |
1019 |
< |
// public void testAwaitUninterruptibly() { testAwaitUninterruptibly(false); } |
1020 |
< |
// public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); } |
1021 |
< |
// public void testAwaitUninterruptibly(boolean fair) { |
1022 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1023 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1024 |
< |
// final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
1025 |
< |
|
1026 |
< |
// Thread t1 = newStartedThread(new CheckedRunnable() { |
1027 |
< |
// public void realRun() { |
1028 |
< |
// // Interrupt before awaitUninterruptibly |
1029 |
< |
// lock.writeLock().lock(); |
1030 |
< |
// pleaseInterrupt.countDown(); |
1031 |
< |
// Thread.currentThread().interrupt(); |
1032 |
< |
// c.awaitUninterruptibly(); |
1033 |
< |
// assertTrue(Thread.interrupted()); |
1034 |
< |
// lock.writeLock().unlock(); |
1035 |
< |
// }}); |
1036 |
< |
|
1037 |
< |
// Thread t2 = newStartedThread(new CheckedRunnable() { |
1038 |
< |
// public void realRun() { |
1039 |
< |
// // Interrupt during awaitUninterruptibly |
1040 |
< |
// lock.writeLock().lock(); |
1041 |
< |
// pleaseInterrupt.countDown(); |
1042 |
< |
// c.awaitUninterruptibly(); |
1043 |
< |
// assertTrue(Thread.interrupted()); |
1044 |
< |
// lock.writeLock().unlock(); |
1045 |
< |
// }}); |
1046 |
< |
|
1047 |
< |
// await(pleaseInterrupt); |
1048 |
< |
// lock.writeLock().lock(); |
1049 |
< |
// lock.writeLock().unlock(); |
1050 |
< |
// t2.interrupt(); |
1051 |
< |
|
1052 |
< |
// assertThreadStaysAlive(t1); |
1053 |
< |
// assertTrue(t2.isAlive()); |
1054 |
< |
|
1055 |
< |
// lock.writeLock().lock(); |
1056 |
< |
// c.signalAll(); |
1057 |
< |
// lock.writeLock().unlock(); |
1058 |
< |
|
1059 |
< |
// awaitTermination(t1); |
1060 |
< |
// awaitTermination(t2); |
1061 |
< |
// } |
1062 |
< |
|
1063 |
< |
// /** |
1064 |
< |
// * await/awaitNanos/awaitUntil is interruptible |
1065 |
< |
// */ |
1066 |
< |
// public void testInterruptible_await() { testInterruptible(false, AwaitMethod.await); } |
1067 |
< |
// public void testInterruptible_await_fair() { testInterruptible(true, AwaitMethod.await); } |
1068 |
< |
// public void testInterruptible_awaitTimed() { testInterruptible(false, AwaitMethod.awaitTimed); } |
1069 |
< |
// public void testInterruptible_awaitTimed_fair() { testInterruptible(true, AwaitMethod.awaitTimed); } |
1070 |
< |
// public void testInterruptible_awaitNanos() { testInterruptible(false, AwaitMethod.awaitNanos); } |
1071 |
< |
// public void testInterruptible_awaitNanos_fair() { testInterruptible(true, AwaitMethod.awaitNanos); } |
1072 |
< |
// public void testInterruptible_awaitUntil() { testInterruptible(false, AwaitMethod.awaitUntil); } |
1073 |
< |
// public void testInterruptible_awaitUntil_fair() { testInterruptible(true, AwaitMethod.awaitUntil); } |
1074 |
< |
// public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) { |
1075 |
< |
// final PublicReentrantReadWriteLock lock = |
1076 |
< |
// new PublicReentrantReadWriteLock(fair); |
1077 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1078 |
< |
// final CountDownLatch locked = new CountDownLatch(1); |
1079 |
< |
// Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1080 |
< |
// public void realRun() throws InterruptedException { |
1081 |
< |
// lock.writeLock().lock(); |
1082 |
< |
// assertWriteLockedByMoi(lock); |
1083 |
< |
// assertHasNoWaiters(lock, c); |
1084 |
< |
// locked.countDown(); |
1085 |
< |
// try { |
1086 |
< |
// await(c, awaitMethod); |
1087 |
< |
// } finally { |
1088 |
< |
// assertWriteLockedByMoi(lock); |
1089 |
< |
// assertHasNoWaiters(lock, c); |
1090 |
< |
// lock.writeLock().unlock(); |
1091 |
< |
// assertFalse(Thread.interrupted()); |
1092 |
< |
// } |
1093 |
< |
// }}); |
1094 |
< |
|
1095 |
< |
// await(locked); |
1096 |
< |
// assertHasWaiters(lock, c, t); |
1097 |
< |
// t.interrupt(); |
1098 |
< |
// awaitTermination(t); |
1099 |
< |
// assertNotWriteLocked(lock); |
1100 |
< |
// } |
1101 |
< |
|
1102 |
< |
// /** |
1103 |
< |
// * signalAll wakes up all threads |
1104 |
< |
// */ |
1105 |
< |
// public void testSignalAll_await() { testSignalAll(false, AwaitMethod.await); } |
1106 |
< |
// public void testSignalAll_await_fair() { testSignalAll(true, AwaitMethod.await); } |
1107 |
< |
// public void testSignalAll_awaitTimed() { testSignalAll(false, AwaitMethod.awaitTimed); } |
1108 |
< |
// public void testSignalAll_awaitTimed_fair() { testSignalAll(true, AwaitMethod.awaitTimed); } |
1109 |
< |
// public void testSignalAll_awaitNanos() { testSignalAll(false, AwaitMethod.awaitNanos); } |
1110 |
< |
// public void testSignalAll_awaitNanos_fair() { testSignalAll(true, AwaitMethod.awaitNanos); } |
1111 |
< |
// public void testSignalAll_awaitUntil() { testSignalAll(false, AwaitMethod.awaitUntil); } |
1112 |
< |
// public void testSignalAll_awaitUntil_fair() { testSignalAll(true, AwaitMethod.awaitUntil); } |
1113 |
< |
// public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) { |
1114 |
< |
// final PublicReentrantReadWriteLock lock = |
1115 |
< |
// new PublicReentrantReadWriteLock(fair); |
1116 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1117 |
< |
// final CountDownLatch locked = new CountDownLatch(2); |
1118 |
< |
// final Lock writeLock = lock.writeLock(); |
1119 |
< |
// class Awaiter extends CheckedRunnable { |
1120 |
< |
// public void realRun() throws InterruptedException { |
1121 |
< |
// writeLock.lock(); |
1122 |
< |
// locked.countDown(); |
1123 |
< |
// await(c, awaitMethod); |
1124 |
< |
// writeLock.unlock(); |
1125 |
< |
// } |
1126 |
< |
// } |
1127 |
< |
|
1128 |
< |
// Thread t1 = newStartedThread(new Awaiter()); |
1129 |
< |
// Thread t2 = newStartedThread(new Awaiter()); |
1130 |
< |
|
1131 |
< |
// await(locked); |
1132 |
< |
// writeLock.lock(); |
1133 |
< |
// assertHasWaiters(lock, c, t1, t2); |
1134 |
< |
// c.signalAll(); |
1135 |
< |
// assertHasNoWaiters(lock, c); |
1136 |
< |
// writeLock.unlock(); |
1137 |
< |
// awaitTermination(t1); |
1138 |
< |
// awaitTermination(t2); |
1139 |
< |
// } |
1140 |
< |
|
1141 |
< |
// /** |
1142 |
< |
// * signal wakes up waiting threads in FIFO order |
1143 |
< |
// */ |
1144 |
< |
// public void testSignalWakesFifo() { testSignalWakesFifo(false); } |
1145 |
< |
// public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); } |
1146 |
< |
// public void testSignalWakesFifo(boolean fair) { |
1147 |
< |
// final PublicReentrantReadWriteLock lock = |
1148 |
< |
// new PublicReentrantReadWriteLock(fair); |
1149 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1150 |
< |
// final CountDownLatch locked1 = new CountDownLatch(1); |
1151 |
< |
// final CountDownLatch locked2 = new CountDownLatch(1); |
1152 |
< |
// final Lock writeLock = lock.writeLock(); |
1153 |
< |
// Thread t1 = newStartedThread(new CheckedRunnable() { |
1154 |
< |
// public void realRun() throws InterruptedException { |
1155 |
< |
// writeLock.lock(); |
1156 |
< |
// locked1.countDown(); |
1157 |
< |
// c.await(); |
1158 |
< |
// writeLock.unlock(); |
1159 |
< |
// }}); |
1160 |
< |
|
1161 |
< |
// await(locked1); |
1162 |
< |
|
1163 |
< |
// Thread t2 = newStartedThread(new CheckedRunnable() { |
1164 |
< |
// public void realRun() throws InterruptedException { |
1165 |
< |
// writeLock.lock(); |
1166 |
< |
// locked2.countDown(); |
1167 |
< |
// c.await(); |
1168 |
< |
// writeLock.unlock(); |
1169 |
< |
// }}); |
1170 |
< |
|
1171 |
< |
// await(locked2); |
1172 |
< |
|
1173 |
< |
// writeLock.lock(); |
1174 |
< |
// assertHasWaiters(lock, c, t1, t2); |
1175 |
< |
// assertFalse(lock.hasQueuedThreads()); |
1176 |
< |
// c.signal(); |
1177 |
< |
// assertHasWaiters(lock, c, t2); |
1178 |
< |
// assertTrue(lock.hasQueuedThread(t1)); |
1179 |
< |
// assertFalse(lock.hasQueuedThread(t2)); |
1180 |
< |
// c.signal(); |
1181 |
< |
// assertHasNoWaiters(lock, c); |
1182 |
< |
// assertTrue(lock.hasQueuedThread(t1)); |
1183 |
< |
// assertTrue(lock.hasQueuedThread(t2)); |
1184 |
< |
// writeLock.unlock(); |
1185 |
< |
// awaitTermination(t1); |
1186 |
< |
// awaitTermination(t2); |
1187 |
< |
// } |
1188 |
< |
|
1189 |
< |
// /** |
1190 |
< |
// * await after multiple reentrant locking preserves lock count |
1191 |
< |
// */ |
1192 |
< |
// public void testAwaitLockCount() { testAwaitLockCount(false); } |
1193 |
< |
// public void testAwaitLockCount_fair() { testAwaitLockCount(true); } |
1194 |
< |
// public void testAwaitLockCount(boolean fair) { |
1195 |
< |
// final PublicReentrantReadWriteLock lock = |
1196 |
< |
// new PublicReentrantReadWriteLock(fair); |
1197 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1198 |
< |
// final CountDownLatch locked = new CountDownLatch(2); |
1199 |
< |
// Thread t1 = newStartedThread(new CheckedRunnable() { |
1200 |
< |
// public void realRun() throws InterruptedException { |
1201 |
< |
// lock.writeLock().lock(); |
1202 |
< |
// assertWriteLockedByMoi(lock); |
1203 |
< |
// assertEquals(1, lock.writeLock().getHoldCount()); |
1204 |
< |
// locked.countDown(); |
1205 |
< |
// c.await(); |
1206 |
< |
// assertWriteLockedByMoi(lock); |
1207 |
< |
// assertEquals(1, lock.writeLock().getHoldCount()); |
1208 |
< |
// lock.writeLock().unlock(); |
1209 |
< |
// }}); |
1210 |
< |
|
1211 |
< |
// Thread t2 = newStartedThread(new CheckedRunnable() { |
1212 |
< |
// public void realRun() throws InterruptedException { |
1213 |
< |
// lock.writeLock().lock(); |
1214 |
< |
// lock.writeLock().lock(); |
1215 |
< |
// assertWriteLockedByMoi(lock); |
1216 |
< |
// assertEquals(2, lock.writeLock().getHoldCount()); |
1217 |
< |
// locked.countDown(); |
1218 |
< |
// c.await(); |
1219 |
< |
// assertWriteLockedByMoi(lock); |
1220 |
< |
// assertEquals(2, lock.writeLock().getHoldCount()); |
1221 |
< |
// lock.writeLock().unlock(); |
1222 |
< |
// lock.writeLock().unlock(); |
1223 |
< |
// }}); |
1224 |
< |
|
1225 |
< |
// await(locked); |
1226 |
< |
// lock.writeLock().lock(); |
1227 |
< |
// assertHasWaiters(lock, c, t1, t2); |
1228 |
< |
// c.signalAll(); |
1229 |
< |
// assertHasNoWaiters(lock, c); |
1230 |
< |
// lock.writeLock().unlock(); |
1231 |
< |
// awaitTermination(t1); |
1232 |
< |
// awaitTermination(t2); |
1233 |
< |
// } |
1234 |
< |
|
1235 |
< |
// /** |
1236 |
< |
// * A serialized lock deserializes as unlocked |
1237 |
< |
// */ |
1238 |
< |
// public void testSerialization() { testSerialization(false); } |
1239 |
< |
// public void testSerialization_fair() { testSerialization(true); } |
1240 |
< |
// public void testSerialization(boolean fair) { |
1241 |
< |
// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1242 |
< |
// lock.writeLock().lock(); |
1243 |
< |
// lock.readLock().lock(); |
1244 |
< |
|
1245 |
< |
// ReentrantReadWriteLock clone = serialClone(lock); |
1246 |
< |
// assertEquals(lock.isFair(), clone.isFair()); |
1247 |
< |
// assertTrue(lock.isWriteLocked()); |
1248 |
< |
// assertFalse(clone.isWriteLocked()); |
1249 |
< |
// assertEquals(1, lock.getReadLockCount()); |
1250 |
< |
// assertEquals(0, clone.getReadLockCount()); |
1251 |
< |
// clone.writeLock().lock(); |
1252 |
< |
// clone.readLock().lock(); |
1253 |
< |
// assertTrue(clone.isWriteLocked()); |
1254 |
< |
// assertEquals(1, clone.getReadLockCount()); |
1255 |
< |
// clone.readLock().unlock(); |
1256 |
< |
// clone.writeLock().unlock(); |
1257 |
< |
// assertFalse(clone.isWriteLocked()); |
1258 |
< |
// assertEquals(1, lock.getReadLockCount()); |
1259 |
< |
// assertEquals(0, clone.getReadLockCount()); |
1260 |
< |
// } |
1261 |
< |
|
1262 |
< |
// /** |
1263 |
< |
// * hasQueuedThreads reports whether there are waiting threads |
1264 |
< |
// */ |
1265 |
< |
// public void testHasQueuedThreads() { testHasQueuedThreads(false); } |
1266 |
< |
// public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); } |
1267 |
< |
// public void testHasQueuedThreads(boolean fair) { |
1268 |
< |
// final PublicReentrantReadWriteLock lock = |
1269 |
< |
// new PublicReentrantReadWriteLock(fair); |
1270 |
< |
// Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1271 |
< |
// Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1272 |
< |
// assertFalse(lock.hasQueuedThreads()); |
1273 |
< |
// lock.writeLock().lock(); |
1274 |
< |
// assertFalse(lock.hasQueuedThreads()); |
1275 |
< |
// t1.start(); |
1276 |
< |
// waitForQueuedThread(lock, t1); |
1277 |
< |
// assertTrue(lock.hasQueuedThreads()); |
1278 |
< |
// t2.start(); |
1279 |
< |
// waitForQueuedThread(lock, t2); |
1280 |
< |
// assertTrue(lock.hasQueuedThreads()); |
1281 |
< |
// t1.interrupt(); |
1282 |
< |
// awaitTermination(t1); |
1283 |
< |
// assertTrue(lock.hasQueuedThreads()); |
1284 |
< |
// lock.writeLock().unlock(); |
1285 |
< |
// awaitTermination(t2); |
1286 |
< |
// assertFalse(lock.hasQueuedThreads()); |
1287 |
< |
// } |
1288 |
< |
|
1289 |
< |
// /** |
1290 |
< |
// * hasQueuedThread(null) throws NPE |
1291 |
< |
// */ |
1292 |
< |
// public void testHasQueuedThreadNPE() { testHasQueuedThreadNPE(false); } |
1293 |
< |
// public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); } |
1294 |
< |
// public void testHasQueuedThreadNPE(boolean fair) { |
1295 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1296 |
< |
// try { |
1297 |
< |
// lock.hasQueuedThread(null); |
1298 |
< |
// shouldThrow(); |
1299 |
< |
// } catch (NullPointerException success) {} |
1300 |
< |
// } |
1301 |
< |
|
1302 |
< |
// /** |
1303 |
< |
// * hasQueuedThread reports whether a thread is queued |
1304 |
< |
// */ |
1305 |
< |
// public void testHasQueuedThread() { testHasQueuedThread(false); } |
1306 |
< |
// public void testHasQueuedThread_fair() { testHasQueuedThread(true); } |
1307 |
< |
// public void testHasQueuedThread(boolean fair) { |
1308 |
< |
// final PublicReentrantReadWriteLock lock = |
1309 |
< |
// new PublicReentrantReadWriteLock(fair); |
1310 |
< |
// Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1311 |
< |
// Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1312 |
< |
// assertFalse(lock.hasQueuedThread(t1)); |
1313 |
< |
// assertFalse(lock.hasQueuedThread(t2)); |
1314 |
< |
// lock.writeLock().lock(); |
1315 |
< |
// t1.start(); |
1316 |
< |
// waitForQueuedThread(lock, t1); |
1317 |
< |
// assertTrue(lock.hasQueuedThread(t1)); |
1318 |
< |
// assertFalse(lock.hasQueuedThread(t2)); |
1319 |
< |
// t2.start(); |
1320 |
< |
// waitForQueuedThread(lock, t2); |
1321 |
< |
// assertTrue(lock.hasQueuedThread(t1)); |
1322 |
< |
// assertTrue(lock.hasQueuedThread(t2)); |
1323 |
< |
// t1.interrupt(); |
1324 |
< |
// awaitTermination(t1); |
1325 |
< |
// assertFalse(lock.hasQueuedThread(t1)); |
1326 |
< |
// assertTrue(lock.hasQueuedThread(t2)); |
1327 |
< |
// lock.writeLock().unlock(); |
1328 |
< |
// awaitTermination(t2); |
1329 |
< |
// assertFalse(lock.hasQueuedThread(t1)); |
1330 |
< |
// assertFalse(lock.hasQueuedThread(t2)); |
1331 |
< |
// } |
1332 |
< |
|
1333 |
< |
// /** |
1334 |
< |
// * getQueueLength reports number of waiting threads |
1335 |
< |
// */ |
1336 |
< |
// public void testGetQueueLength() { testGetQueueLength(false); } |
1337 |
< |
// public void testGetQueueLength_fair() { testGetQueueLength(true); } |
1338 |
< |
// public void testGetQueueLength(boolean fair) { |
1339 |
< |
// final PublicReentrantReadWriteLock lock = |
1340 |
< |
// new PublicReentrantReadWriteLock(fair); |
1341 |
< |
// Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1342 |
< |
// Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1343 |
< |
// assertEquals(0, lock.getQueueLength()); |
1344 |
< |
// lock.writeLock().lock(); |
1345 |
< |
// t1.start(); |
1346 |
< |
// waitForQueuedThread(lock, t1); |
1347 |
< |
// assertEquals(1, lock.getQueueLength()); |
1348 |
< |
// t2.start(); |
1349 |
< |
// waitForQueuedThread(lock, t2); |
1350 |
< |
// assertEquals(2, lock.getQueueLength()); |
1351 |
< |
// t1.interrupt(); |
1352 |
< |
// awaitTermination(t1); |
1353 |
< |
// assertEquals(1, lock.getQueueLength()); |
1354 |
< |
// lock.writeLock().unlock(); |
1355 |
< |
// awaitTermination(t2); |
1356 |
< |
// assertEquals(0, lock.getQueueLength()); |
1357 |
< |
// } |
1358 |
< |
|
1359 |
< |
// /** |
1360 |
< |
// * getQueuedThreads includes waiting threads |
1361 |
< |
// */ |
1362 |
< |
// public void testGetQueuedThreads() { testGetQueuedThreads(false); } |
1363 |
< |
// public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); } |
1364 |
< |
// public void testGetQueuedThreads(boolean fair) { |
1365 |
< |
// final PublicReentrantReadWriteLock lock = |
1366 |
< |
// new PublicReentrantReadWriteLock(fair); |
1367 |
< |
// Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1368 |
< |
// Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1369 |
< |
// assertTrue(lock.getQueuedThreads().isEmpty()); |
1370 |
< |
// lock.writeLock().lock(); |
1371 |
< |
// assertTrue(lock.getQueuedThreads().isEmpty()); |
1372 |
< |
// t1.start(); |
1373 |
< |
// waitForQueuedThread(lock, t1); |
1374 |
< |
// assertEquals(1, lock.getQueuedThreads().size()); |
1375 |
< |
// assertTrue(lock.getQueuedThreads().contains(t1)); |
1376 |
< |
// t2.start(); |
1377 |
< |
// waitForQueuedThread(lock, t2); |
1378 |
< |
// assertEquals(2, lock.getQueuedThreads().size()); |
1379 |
< |
// assertTrue(lock.getQueuedThreads().contains(t1)); |
1380 |
< |
// assertTrue(lock.getQueuedThreads().contains(t2)); |
1381 |
< |
// t1.interrupt(); |
1382 |
< |
// awaitTermination(t1); |
1383 |
< |
// assertFalse(lock.getQueuedThreads().contains(t1)); |
1384 |
< |
// assertTrue(lock.getQueuedThreads().contains(t2)); |
1385 |
< |
// assertEquals(1, lock.getQueuedThreads().size()); |
1386 |
< |
// lock.writeLock().unlock(); |
1387 |
< |
// awaitTermination(t2); |
1388 |
< |
// assertTrue(lock.getQueuedThreads().isEmpty()); |
1389 |
< |
// } |
1390 |
< |
|
1391 |
< |
// /** |
1392 |
< |
// * hasWaiters throws NPE if null |
1393 |
< |
// */ |
1394 |
< |
// public void testHasWaitersNPE() { testHasWaitersNPE(false); } |
1395 |
< |
// public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); } |
1396 |
< |
// public void testHasWaitersNPE(boolean fair) { |
1397 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1398 |
< |
// try { |
1399 |
< |
// lock.hasWaiters(null); |
1400 |
< |
// shouldThrow(); |
1401 |
< |
// } catch (NullPointerException success) {} |
1402 |
< |
// } |
1403 |
< |
|
1404 |
< |
// /** |
1405 |
< |
// * getWaitQueueLength throws NPE if null |
1406 |
< |
// */ |
1407 |
< |
// public void testGetWaitQueueLengthNPE() { testGetWaitQueueLengthNPE(false); } |
1408 |
< |
// public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); } |
1409 |
< |
// public void testGetWaitQueueLengthNPE(boolean fair) { |
1410 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1411 |
< |
// try { |
1412 |
< |
// lock.getWaitQueueLength(null); |
1413 |
< |
// shouldThrow(); |
1414 |
< |
// } catch (NullPointerException success) {} |
1415 |
< |
// } |
1416 |
< |
|
1417 |
< |
// /** |
1418 |
< |
// * getWaitingThreads throws NPE if null |
1419 |
< |
// */ |
1420 |
< |
// public void testGetWaitingThreadsNPE() { testGetWaitingThreadsNPE(false); } |
1421 |
< |
// public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); } |
1422 |
< |
// public void testGetWaitingThreadsNPE(boolean fair) { |
1423 |
< |
// final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair); |
1424 |
< |
// try { |
1425 |
< |
// lock.getWaitingThreads(null); |
1426 |
< |
// shouldThrow(); |
1427 |
< |
// } catch (NullPointerException success) {} |
1428 |
< |
// } |
1429 |
< |
|
1430 |
< |
// /** |
1431 |
< |
// * hasWaiters throws IllegalArgumentException if not owned |
1432 |
< |
// */ |
1433 |
< |
// public void testHasWaitersIAE() { testHasWaitersIAE(false); } |
1434 |
< |
// public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); } |
1435 |
< |
// public void testHasWaitersIAE(boolean fair) { |
1436 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1437 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1438 |
< |
// final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair); |
1439 |
< |
// try { |
1440 |
< |
// lock2.hasWaiters(c); |
1441 |
< |
// shouldThrow(); |
1442 |
< |
// } catch (IllegalArgumentException success) {} |
1443 |
< |
// } |
1444 |
< |
|
1445 |
< |
// /** |
1446 |
< |
// * hasWaiters throws IllegalMonitorStateException if not locked |
1447 |
< |
// */ |
1448 |
< |
// public void testHasWaitersIMSE() { testHasWaitersIMSE(false); } |
1449 |
< |
// public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); } |
1450 |
< |
// public void testHasWaitersIMSE(boolean fair) { |
1451 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1452 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1453 |
< |
// try { |
1454 |
< |
// lock.hasWaiters(c); |
1455 |
< |
// shouldThrow(); |
1456 |
< |
// } catch (IllegalMonitorStateException success) {} |
1457 |
< |
// } |
1458 |
< |
|
1459 |
< |
// /** |
1460 |
< |
// * getWaitQueueLength throws IllegalArgumentException if not owned |
1461 |
< |
// */ |
1462 |
< |
// public void testGetWaitQueueLengthIAE() { testGetWaitQueueLengthIAE(false); } |
1463 |
< |
// public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); } |
1464 |
< |
// public void testGetWaitQueueLengthIAE(boolean fair) { |
1465 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1466 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1467 |
< |
// final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair); |
1468 |
< |
// try { |
1469 |
< |
// lock2.getWaitQueueLength(c); |
1470 |
< |
// shouldThrow(); |
1471 |
< |
// } catch (IllegalArgumentException success) {} |
1472 |
< |
// } |
1473 |
< |
|
1474 |
< |
// /** |
1475 |
< |
// * getWaitQueueLength throws IllegalMonitorStateException if not locked |
1476 |
< |
// */ |
1477 |
< |
// public void testGetWaitQueueLengthIMSE() { testGetWaitQueueLengthIMSE(false); } |
1478 |
< |
// public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); } |
1479 |
< |
// public void testGetWaitQueueLengthIMSE(boolean fair) { |
1480 |
< |
// final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1481 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1482 |
< |
// try { |
1483 |
< |
// lock.getWaitQueueLength(c); |
1484 |
< |
// shouldThrow(); |
1485 |
< |
// } catch (IllegalMonitorStateException success) {} |
1486 |
< |
// } |
1487 |
< |
|
1488 |
< |
// /** |
1489 |
< |
// * getWaitingThreads throws IllegalArgumentException if not owned |
1490 |
< |
// */ |
1491 |
< |
// public void testGetWaitingThreadsIAE() { testGetWaitingThreadsIAE(false); } |
1492 |
< |
// public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); } |
1493 |
< |
// public void testGetWaitingThreadsIAE(boolean fair) { |
1494 |
< |
// final PublicReentrantReadWriteLock lock = |
1495 |
< |
// new PublicReentrantReadWriteLock(fair); |
1496 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1497 |
< |
// final PublicReentrantReadWriteLock lock2 = |
1498 |
< |
// new PublicReentrantReadWriteLock(fair); |
1499 |
< |
// try { |
1500 |
< |
// lock2.getWaitingThreads(c); |
1501 |
< |
// shouldThrow(); |
1502 |
< |
// } catch (IllegalArgumentException success) {} |
1503 |
< |
// } |
1504 |
< |
|
1505 |
< |
// /** |
1506 |
< |
// * getWaitingThreads throws IllegalMonitorStateException if not locked |
1507 |
< |
// */ |
1508 |
< |
// public void testGetWaitingThreadsIMSE() { testGetWaitingThreadsIMSE(false); } |
1509 |
< |
// public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); } |
1510 |
< |
// public void testGetWaitingThreadsIMSE(boolean fair) { |
1511 |
< |
// final PublicReentrantReadWriteLock lock = |
1512 |
< |
// new PublicReentrantReadWriteLock(fair); |
1513 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1514 |
< |
// try { |
1515 |
< |
// lock.getWaitingThreads(c); |
1516 |
< |
// shouldThrow(); |
1517 |
< |
// } catch (IllegalMonitorStateException success) {} |
1518 |
< |
// } |
1519 |
< |
|
1520 |
< |
// /** |
1521 |
< |
// * hasWaiters returns true when a thread is waiting, else false |
1522 |
< |
// */ |
1523 |
< |
// public void testHasWaiters() { testHasWaiters(false); } |
1524 |
< |
// public void testHasWaiters_fair() { testHasWaiters(true); } |
1525 |
< |
// public void testHasWaiters(boolean fair) { |
1526 |
< |
// final PublicReentrantReadWriteLock lock = |
1527 |
< |
// new PublicReentrantReadWriteLock(fair); |
1528 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1529 |
< |
// final CountDownLatch locked = new CountDownLatch(1); |
1530 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
1531 |
< |
// public void realRun() throws InterruptedException { |
1532 |
< |
// lock.writeLock().lock(); |
1533 |
< |
// assertHasNoWaiters(lock, c); |
1534 |
< |
// assertFalse(lock.hasWaiters(c)); |
1535 |
< |
// locked.countDown(); |
1536 |
< |
// c.await(); |
1537 |
< |
// assertHasNoWaiters(lock, c); |
1538 |
< |
// assertFalse(lock.hasWaiters(c)); |
1539 |
< |
// lock.writeLock().unlock(); |
1540 |
< |
// }}); |
1541 |
< |
|
1542 |
< |
// await(locked); |
1543 |
< |
// lock.writeLock().lock(); |
1544 |
< |
// assertHasWaiters(lock, c, t); |
1545 |
< |
// assertTrue(lock.hasWaiters(c)); |
1546 |
< |
// c.signal(); |
1547 |
< |
// assertHasNoWaiters(lock, c); |
1548 |
< |
// assertFalse(lock.hasWaiters(c)); |
1549 |
< |
// lock.writeLock().unlock(); |
1550 |
< |
// awaitTermination(t); |
1551 |
< |
// assertHasNoWaiters(lock, c); |
1552 |
< |
// } |
1553 |
< |
|
1554 |
< |
// /** |
1555 |
< |
// * getWaitQueueLength returns number of waiting threads |
1556 |
< |
// */ |
1557 |
< |
// public void testGetWaitQueueLength() { testGetWaitQueueLength(false); } |
1558 |
< |
// public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); } |
1559 |
< |
// public void testGetWaitQueueLength(boolean fair) { |
1560 |
< |
// final PublicReentrantReadWriteLock lock = |
1561 |
< |
// new PublicReentrantReadWriteLock(fair); |
1562 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1563 |
< |
// final CountDownLatch locked = new CountDownLatch(1); |
1564 |
< |
// Thread t = newStartedThread(new CheckedRunnable() { |
1565 |
< |
// public void realRun() throws InterruptedException { |
1566 |
< |
// lock.writeLock().lock(); |
1567 |
< |
// assertEquals(0, lock.getWaitQueueLength(c)); |
1568 |
< |
// locked.countDown(); |
1569 |
< |
// c.await(); |
1570 |
< |
// lock.writeLock().unlock(); |
1571 |
< |
// }}); |
1572 |
< |
|
1573 |
< |
// await(locked); |
1574 |
< |
// lock.writeLock().lock(); |
1575 |
< |
// assertHasWaiters(lock, c, t); |
1576 |
< |
// assertEquals(1, lock.getWaitQueueLength(c)); |
1577 |
< |
// c.signal(); |
1578 |
< |
// assertHasNoWaiters(lock, c); |
1579 |
< |
// assertEquals(0, lock.getWaitQueueLength(c)); |
1580 |
< |
// lock.writeLock().unlock(); |
1581 |
< |
// awaitTermination(t); |
1582 |
< |
// } |
1583 |
< |
|
1584 |
< |
// /** |
1585 |
< |
// * getWaitingThreads returns only and all waiting threads |
1586 |
< |
// */ |
1587 |
< |
// public void testGetWaitingThreads() { testGetWaitingThreads(false); } |
1588 |
< |
// public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); } |
1589 |
< |
// public void testGetWaitingThreads(boolean fair) { |
1590 |
< |
// final PublicReentrantReadWriteLock lock = |
1591 |
< |
// new PublicReentrantReadWriteLock(fair); |
1592 |
< |
// final Condition c = lock.writeLock().newCondition(); |
1593 |
< |
// final CountDownLatch locked1 = new CountDownLatch(1); |
1594 |
< |
// final CountDownLatch locked2 = new CountDownLatch(1); |
1595 |
< |
// Thread t1 = new Thread(new CheckedRunnable() { |
1596 |
< |
// public void realRun() throws InterruptedException { |
1597 |
< |
// lock.writeLock().lock(); |
1598 |
< |
// assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1599 |
< |
// locked1.countDown(); |
1600 |
< |
// c.await(); |
1601 |
< |
// lock.writeLock().unlock(); |
1602 |
< |
// }}); |
1603 |
< |
|
1604 |
< |
// Thread t2 = new Thread(new CheckedRunnable() { |
1605 |
< |
// public void realRun() throws InterruptedException { |
1606 |
< |
// lock.writeLock().lock(); |
1607 |
< |
// assertFalse(lock.getWaitingThreads(c).isEmpty()); |
1608 |
< |
// locked2.countDown(); |
1609 |
< |
// c.await(); |
1610 |
< |
// lock.writeLock().unlock(); |
1611 |
< |
// }}); |
1612 |
< |
|
1613 |
< |
// lock.writeLock().lock(); |
1614 |
< |
// assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1615 |
< |
// lock.writeLock().unlock(); |
1616 |
< |
|
1617 |
< |
// t1.start(); |
1618 |
< |
// await(locked1); |
1619 |
< |
// t2.start(); |
1620 |
< |
// await(locked2); |
1621 |
< |
|
1622 |
< |
// lock.writeLock().lock(); |
1623 |
< |
// assertTrue(lock.hasWaiters(c)); |
1624 |
< |
// assertTrue(lock.getWaitingThreads(c).contains(t1)); |
1625 |
< |
// assertTrue(lock.getWaitingThreads(c).contains(t2)); |
1626 |
< |
// assertEquals(2, lock.getWaitingThreads(c).size()); |
1627 |
< |
// c.signalAll(); |
1628 |
< |
// assertHasNoWaiters(lock, c); |
1629 |
< |
// lock.writeLock().unlock(); |
1630 |
< |
|
1631 |
< |
// awaitTermination(t1); |
1632 |
< |
// awaitTermination(t2); |
1633 |
< |
|
1634 |
< |
// assertHasNoWaiters(lock, c); |
1635 |
< |
// } |
1636 |
< |
|
1637 |
< |
// /** |
1638 |
< |
// * toString indicates current lock state |
1639 |
< |
// */ |
1640 |
< |
// public void testToString() { testToString(false); } |
1641 |
< |
// public void testToString_fair() { testToString(true); } |
1642 |
< |
// public void testToString(boolean fair) { |
1643 |
< |
// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1644 |
< |
// assertTrue(lock.toString().contains("Write locks = 0")); |
1645 |
< |
// assertTrue(lock.toString().contains("Read locks = 0")); |
1646 |
< |
// lock.writeLock().lock(); |
1647 |
< |
// assertTrue(lock.toString().contains("Write locks = 1")); |
1648 |
< |
// assertTrue(lock.toString().contains("Read locks = 0")); |
1649 |
< |
// lock.writeLock().unlock(); |
1650 |
< |
// lock.readLock().lock(); |
1651 |
< |
// lock.readLock().lock(); |
1652 |
< |
// assertTrue(lock.toString().contains("Write locks = 0")); |
1653 |
< |
// assertTrue(lock.toString().contains("Read locks = 2")); |
1654 |
< |
// } |
1655 |
< |
|
1656 |
< |
// /** |
1657 |
< |
// * readLock.toString indicates current lock state |
1658 |
< |
// */ |
1659 |
< |
// public void testReadLockToString() { testReadLockToString(false); } |
1660 |
< |
// public void testReadLockToString_fair() { testReadLockToString(true); } |
1661 |
< |
// public void testReadLockToString(boolean fair) { |
1662 |
< |
// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1663 |
< |
// assertTrue(lock.readLock().toString().contains("Read locks = 0")); |
1664 |
< |
// lock.readLock().lock(); |
1665 |
< |
// lock.readLock().lock(); |
1666 |
< |
// assertTrue(lock.readLock().toString().contains("Read locks = 2")); |
1667 |
< |
// } |
1668 |
< |
|
1669 |
< |
// /** |
1670 |
< |
// * writeLock.toString indicates current lock state |
1671 |
< |
// */ |
1672 |
< |
// public void testWriteLockToString() { testWriteLockToString(false); } |
1673 |
< |
// public void testWriteLockToString_fair() { testWriteLockToString(true); } |
1674 |
< |
// public void testWriteLockToString(boolean fair) { |
1675 |
< |
// ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
1676 |
< |
// assertTrue(lock.writeLock().toString().contains("Unlocked")); |
1677 |
< |
// lock.writeLock().lock(); |
1678 |
< |
// assertTrue(lock.writeLock().toString().contains("Locked")); |
1679 |
< |
// lock.writeLock().unlock(); |
1680 |
< |
// assertTrue(lock.writeLock().toString().contains("Unlocked")); |
1681 |
< |
// } |
32 |
> |
/** |
33 |
> |
* Releases write lock, checking isWriteLocked before and after |
34 |
> |
*/ |
35 |
> |
void releaseWriteLock(StampedLock lock, long stamp) { |
36 |
> |
assertTrue(lock.isWriteLocked()); |
37 |
> |
assertValid(lock, stamp); |
38 |
> |
lock.unlockWrite(stamp); |
39 |
> |
assertFalse(lock.isWriteLocked()); |
40 |
> |
assertFalse(lock.validate(stamp)); |
41 |
> |
} |
42 |
> |
|
43 |
> |
/** |
44 |
> |
* Releases read lock, checking isReadLocked before and after |
45 |
> |
*/ |
46 |
> |
void releaseReadLock(StampedLock lock, long stamp) { |
47 |
> |
assertTrue(lock.isReadLocked()); |
48 |
> |
assertValid(lock, stamp); |
49 |
> |
lock.unlockRead(stamp); |
50 |
> |
assertFalse(lock.isReadLocked()); |
51 |
> |
assertTrue(lock.validate(stamp)); |
52 |
> |
} |
53 |
> |
|
54 |
> |
long assertNonZero(long v) { |
55 |
> |
assertTrue(v != 0L); |
56 |
> |
return v; |
57 |
> |
} |
58 |
> |
|
59 |
> |
long assertValid(StampedLock lock, long stamp) { |
60 |
> |
assertTrue(stamp != 0L); |
61 |
> |
assertTrue(lock.validate(stamp)); |
62 |
> |
return stamp; |
63 |
> |
} |
64 |
> |
|
65 |
> |
void assertUnlocked(StampedLock lock) { |
66 |
> |
assertFalse(lock.isReadLocked()); |
67 |
> |
assertFalse(lock.isWriteLocked()); |
68 |
> |
assertEquals(0, lock.getReadLockCount()); |
69 |
> |
assertValid(lock, lock.tryOptimisticRead()); |
70 |
> |
} |
71 |
> |
|
72 |
> |
List<Action> lockLockers(Lock lock) { |
73 |
> |
List<Action> lockers = new ArrayList<>(); |
74 |
> |
lockers.add(() -> lock.lock()); |
75 |
> |
lockers.add(() -> lock.lockInterruptibly()); |
76 |
> |
lockers.add(() -> lock.tryLock()); |
77 |
> |
lockers.add(() -> lock.tryLock(Long.MIN_VALUE, DAYS)); |
78 |
> |
lockers.add(() -> lock.tryLock(0L, DAYS)); |
79 |
> |
lockers.add(() -> lock.tryLock(Long.MAX_VALUE, DAYS)); |
80 |
> |
return lockers; |
81 |
> |
} |
82 |
> |
|
83 |
> |
List<Function<StampedLock, Long>> readLockers() { |
84 |
> |
List<Function<StampedLock, Long>> readLockers = new ArrayList<>(); |
85 |
> |
readLockers.add(sl -> sl.readLock()); |
86 |
> |
readLockers.add(sl -> sl.tryReadLock()); |
87 |
> |
readLockers.add(sl -> readLockInterruptiblyUninterrupted(sl)); |
88 |
> |
readLockers.add(sl -> tryReadLockUninterrupted(sl, Long.MIN_VALUE, DAYS)); |
89 |
> |
readLockers.add(sl -> tryReadLockUninterrupted(sl, 0L, DAYS)); |
90 |
> |
readLockers.add(sl -> sl.tryConvertToReadLock(sl.tryOptimisticRead())); |
91 |
> |
return readLockers; |
92 |
> |
} |
93 |
> |
|
94 |
> |
List<BiConsumer<StampedLock, Long>> readUnlockers() { |
95 |
> |
List<BiConsumer<StampedLock, Long>> readUnlockers = new ArrayList<>(); |
96 |
> |
readUnlockers.add((sl, stamp) -> sl.unlockRead(stamp)); |
97 |
> |
readUnlockers.add((sl, stamp) -> assertTrue(sl.tryUnlockRead())); |
98 |
> |
readUnlockers.add((sl, stamp) -> sl.asReadLock().unlock()); |
99 |
> |
readUnlockers.add((sl, stamp) -> sl.unlock(stamp)); |
100 |
> |
readUnlockers.add((sl, stamp) -> assertValid(sl, sl.tryConvertToOptimisticRead(stamp))); |
101 |
> |
return readUnlockers; |
102 |
> |
} |
103 |
> |
|
104 |
> |
List<Function<StampedLock, Long>> writeLockers() { |
105 |
> |
List<Function<StampedLock, Long>> writeLockers = new ArrayList<>(); |
106 |
> |
writeLockers.add(sl -> sl.writeLock()); |
107 |
> |
writeLockers.add(sl -> sl.tryWriteLock()); |
108 |
> |
writeLockers.add(sl -> writeLockInterruptiblyUninterrupted(sl)); |
109 |
> |
writeLockers.add(sl -> tryWriteLockUninterrupted(sl, Long.MIN_VALUE, DAYS)); |
110 |
> |
writeLockers.add(sl -> tryWriteLockUninterrupted(sl, 0L, DAYS)); |
111 |
> |
writeLockers.add(sl -> sl.tryConvertToWriteLock(sl.tryOptimisticRead())); |
112 |
> |
return writeLockers; |
113 |
> |
} |
114 |
> |
|
115 |
> |
List<BiConsumer<StampedLock, Long>> writeUnlockers() { |
116 |
> |
List<BiConsumer<StampedLock, Long>> writeUnlockers = new ArrayList<>(); |
117 |
> |
writeUnlockers.add((sl, stamp) -> sl.unlockWrite(stamp)); |
118 |
> |
writeUnlockers.add((sl, stamp) -> assertTrue(sl.tryUnlockWrite())); |
119 |
> |
writeUnlockers.add((sl, stamp) -> sl.asWriteLock().unlock()); |
120 |
> |
writeUnlockers.add((sl, stamp) -> sl.unlock(stamp)); |
121 |
> |
writeUnlockers.add((sl, stamp) -> assertValid(sl, sl.tryConvertToOptimisticRead(stamp))); |
122 |
> |
return writeUnlockers; |
123 |
> |
} |
124 |
> |
|
125 |
> |
/** |
126 |
> |
* Constructed StampedLock is in unlocked state |
127 |
> |
*/ |
128 |
> |
public void testConstructor() { |
129 |
> |
assertUnlocked(new StampedLock()); |
130 |
> |
} |
131 |
> |
|
132 |
> |
/** |
133 |
> |
* write-locking, then unlocking, an unlocked lock succeed |
134 |
> |
*/ |
135 |
> |
public void testWriteLock_lockUnlock() { |
136 |
> |
StampedLock lock = new StampedLock(); |
137 |
> |
|
138 |
> |
for (Function<StampedLock, Long> writeLocker : writeLockers()) |
139 |
> |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
140 |
> |
assertFalse(lock.isWriteLocked()); |
141 |
> |
assertFalse(lock.isReadLocked()); |
142 |
> |
assertEquals(0, lock.getReadLockCount()); |
143 |
> |
|
144 |
> |
long s = writeLocker.apply(lock); |
145 |
> |
assertValid(lock, s); |
146 |
> |
assertTrue(lock.isWriteLocked()); |
147 |
> |
assertFalse(lock.isReadLocked()); |
148 |
> |
assertEquals(0, lock.getReadLockCount()); |
149 |
> |
writeUnlocker.accept(lock, s); |
150 |
> |
assertUnlocked(lock); |
151 |
> |
} |
152 |
> |
} |
153 |
> |
|
154 |
> |
/** |
155 |
> |
* read-locking, then unlocking, an unlocked lock succeed |
156 |
> |
*/ |
157 |
> |
public void testReadLock_lockUnlock() { |
158 |
> |
StampedLock lock = new StampedLock(); |
159 |
> |
|
160 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) |
161 |
> |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
162 |
> |
long s = 42; |
163 |
> |
for (int i = 0; i < 2; i++) { |
164 |
> |
s = assertValid(lock, readLocker.apply(lock)); |
165 |
> |
assertFalse(lock.isWriteLocked()); |
166 |
> |
assertTrue(lock.isReadLocked()); |
167 |
> |
assertEquals(i + 1, lock.getReadLockCount()); |
168 |
> |
} |
169 |
> |
for (int i = 0; i < 2; i++) { |
170 |
> |
assertFalse(lock.isWriteLocked()); |
171 |
> |
assertTrue(lock.isReadLocked()); |
172 |
> |
assertEquals(2 - i, lock.getReadLockCount()); |
173 |
> |
readUnlocker.accept(lock, s); |
174 |
> |
} |
175 |
> |
assertUnlocked(lock); |
176 |
> |
} |
177 |
> |
} |
178 |
> |
|
179 |
> |
/** |
180 |
> |
* tryUnlockWrite fails if not write locked |
181 |
> |
*/ |
182 |
> |
public void testTryUnlockWrite_failure() { |
183 |
> |
StampedLock lock = new StampedLock(); |
184 |
> |
assertFalse(lock.tryUnlockWrite()); |
185 |
> |
|
186 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) |
187 |
> |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
188 |
> |
long s = assertValid(lock, readLocker.apply(lock)); |
189 |
> |
assertFalse(lock.tryUnlockWrite()); |
190 |
> |
assertTrue(lock.isReadLocked()); |
191 |
> |
readUnlocker.accept(lock, s); |
192 |
> |
assertUnlocked(lock); |
193 |
> |
} |
194 |
> |
} |
195 |
> |
|
196 |
> |
/** |
197 |
> |
* tryUnlockRead fails if not read locked |
198 |
> |
*/ |
199 |
> |
public void testTryUnlockRead_failure() { |
200 |
> |
StampedLock lock = new StampedLock(); |
201 |
> |
assertFalse(lock.tryUnlockRead()); |
202 |
> |
|
203 |
> |
for (Function<StampedLock, Long> writeLocker : writeLockers()) |
204 |
> |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
205 |
> |
long s = writeLocker.apply(lock); |
206 |
> |
assertFalse(lock.tryUnlockRead()); |
207 |
> |
assertTrue(lock.isWriteLocked()); |
208 |
> |
writeUnlocker.accept(lock, s); |
209 |
> |
assertUnlocked(lock); |
210 |
> |
} |
211 |
> |
} |
212 |
> |
|
213 |
> |
/** |
214 |
> |
* validate(0L) fails |
215 |
> |
*/ |
216 |
> |
public void testValidate0() { |
217 |
> |
StampedLock lock = new StampedLock(); |
218 |
> |
assertFalse(lock.validate(0L)); |
219 |
> |
} |
220 |
> |
|
221 |
> |
/** |
222 |
> |
* A stamp obtained from a successful lock operation validates while the lock is held |
223 |
> |
*/ |
224 |
> |
public void testValidate() throws InterruptedException { |
225 |
> |
StampedLock lock = new StampedLock(); |
226 |
> |
|
227 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) |
228 |
> |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
229 |
> |
long s = assertNonZero(readLocker.apply(lock)); |
230 |
> |
assertTrue(lock.validate(s)); |
231 |
> |
readUnlocker.accept(lock, s); |
232 |
> |
} |
233 |
> |
|
234 |
> |
for (Function<StampedLock, Long> writeLocker : writeLockers()) |
235 |
> |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
236 |
> |
long s = assertNonZero(writeLocker.apply(lock)); |
237 |
> |
assertTrue(lock.validate(s)); |
238 |
> |
writeUnlocker.accept(lock, s); |
239 |
> |
} |
240 |
> |
} |
241 |
> |
|
242 |
> |
/** |
243 |
> |
* A stamp obtained from an unsuccessful lock operation does not validate |
244 |
> |
*/ |
245 |
> |
public void testValidate2() throws InterruptedException { |
246 |
> |
StampedLock lock = new StampedLock(); |
247 |
> |
long s = assertNonZero(lock.writeLock()); |
248 |
> |
assertTrue(lock.validate(s)); |
249 |
> |
assertFalse(lock.validate(lock.tryWriteLock())); |
250 |
> |
assertFalse(lock.validate(lock.tryWriteLock(randomExpiredTimeout(), |
251 |
> |
randomTimeUnit()))); |
252 |
> |
assertFalse(lock.validate(lock.tryReadLock())); |
253 |
> |
assertFalse(lock.validate(lock.tryWriteLock(randomExpiredTimeout(), |
254 |
> |
randomTimeUnit()))); |
255 |
> |
assertFalse(lock.validate(lock.tryOptimisticRead())); |
256 |
> |
lock.unlockWrite(s); |
257 |
> |
} |
258 |
> |
|
259 |
> |
void assertThrowInterruptedExceptionWhenPreInterrupted(Action[] actions) { |
260 |
> |
for (Action action : actions) { |
261 |
> |
Thread.currentThread().interrupt(); |
262 |
> |
try { |
263 |
> |
action.run(); |
264 |
> |
shouldThrow(); |
265 |
> |
} |
266 |
> |
catch (InterruptedException success) {} |
267 |
> |
catch (Throwable fail) { threadUnexpectedException(fail); } |
268 |
> |
assertFalse(Thread.interrupted()); |
269 |
> |
} |
270 |
> |
} |
271 |
> |
|
272 |
> |
/** |
273 |
> |
* interruptible operations throw InterruptedException when pre-interrupted |
274 |
> |
*/ |
275 |
> |
public void testInterruptibleOperationsThrowInterruptedExceptionWhenPreInterrupted() { |
276 |
> |
final StampedLock lock = new StampedLock(); |
277 |
> |
|
278 |
> |
Action[] interruptibleLockActions = { |
279 |
> |
() -> lock.writeLockInterruptibly(), |
280 |
> |
() -> lock.tryWriteLock(Long.MIN_VALUE, DAYS), |
281 |
> |
() -> lock.tryWriteLock(Long.MAX_VALUE, DAYS), |
282 |
> |
() -> lock.readLockInterruptibly(), |
283 |
> |
() -> lock.tryReadLock(Long.MIN_VALUE, DAYS), |
284 |
> |
() -> lock.tryReadLock(Long.MAX_VALUE, DAYS), |
285 |
> |
() -> lock.asWriteLock().lockInterruptibly(), |
286 |
> |
() -> lock.asWriteLock().tryLock(0L, DAYS), |
287 |
> |
() -> lock.asWriteLock().tryLock(Long.MAX_VALUE, DAYS), |
288 |
> |
() -> lock.asReadLock().lockInterruptibly(), |
289 |
> |
() -> lock.asReadLock().tryLock(0L, DAYS), |
290 |
> |
() -> lock.asReadLock().tryLock(Long.MAX_VALUE, DAYS), |
291 |
> |
}; |
292 |
> |
shuffle(interruptibleLockActions); |
293 |
> |
|
294 |
> |
assertThrowInterruptedExceptionWhenPreInterrupted(interruptibleLockActions); |
295 |
> |
{ |
296 |
> |
long s = lock.writeLock(); |
297 |
> |
assertThrowInterruptedExceptionWhenPreInterrupted(interruptibleLockActions); |
298 |
> |
lock.unlockWrite(s); |
299 |
> |
} |
300 |
> |
{ |
301 |
> |
long s = lock.readLock(); |
302 |
> |
assertThrowInterruptedExceptionWhenPreInterrupted(interruptibleLockActions); |
303 |
> |
lock.unlockRead(s); |
304 |
> |
} |
305 |
> |
} |
306 |
> |
|
307 |
> |
void assertThrowInterruptedExceptionWhenInterrupted(Action[] actions) { |
308 |
> |
int n = actions.length; |
309 |
> |
Future<?>[] futures = new Future<?>[n]; |
310 |
> |
CountDownLatch threadsStarted = new CountDownLatch(n); |
311 |
> |
CountDownLatch done = new CountDownLatch(n); |
312 |
> |
|
313 |
> |
for (int i = 0; i < n; i++) { |
314 |
> |
Action action = actions[i]; |
315 |
> |
futures[i] = cachedThreadPool.submit(new CheckedRunnable() { |
316 |
> |
public void realRun() throws Throwable { |
317 |
> |
threadsStarted.countDown(); |
318 |
> |
try { |
319 |
> |
action.run(); |
320 |
> |
shouldThrow(); |
321 |
> |
} |
322 |
> |
catch (InterruptedException success) {} |
323 |
> |
catch (Throwable fail) { threadUnexpectedException(fail); } |
324 |
> |
assertFalse(Thread.interrupted()); |
325 |
> |
done.countDown(); |
326 |
> |
}}); |
327 |
> |
} |
328 |
> |
|
329 |
> |
await(threadsStarted); |
330 |
> |
assertEquals(n, done.getCount()); |
331 |
> |
for (Future<?> future : futures) // Interrupt all the tasks |
332 |
> |
future.cancel(true); |
333 |
> |
await(done); |
334 |
> |
} |
335 |
> |
|
336 |
> |
/** |
337 |
> |
* interruptible operations throw InterruptedException when write locked and interrupted |
338 |
> |
*/ |
339 |
> |
public void testInterruptibleOperationsThrowInterruptedExceptionWriteLockedInterrupted() { |
340 |
> |
final StampedLock lock = new StampedLock(); |
341 |
> |
long s = lock.writeLock(); |
342 |
> |
|
343 |
> |
Action[] interruptibleLockBlockingActions = { |
344 |
> |
() -> lock.writeLockInterruptibly(), |
345 |
> |
() -> lock.tryWriteLock(Long.MAX_VALUE, DAYS), |
346 |
> |
() -> lock.readLockInterruptibly(), |
347 |
> |
() -> lock.tryReadLock(Long.MAX_VALUE, DAYS), |
348 |
> |
() -> lock.asWriteLock().lockInterruptibly(), |
349 |
> |
() -> lock.asWriteLock().tryLock(Long.MAX_VALUE, DAYS), |
350 |
> |
() -> lock.asReadLock().lockInterruptibly(), |
351 |
> |
() -> lock.asReadLock().tryLock(Long.MAX_VALUE, DAYS), |
352 |
> |
}; |
353 |
> |
shuffle(interruptibleLockBlockingActions); |
354 |
> |
|
355 |
> |
assertThrowInterruptedExceptionWhenInterrupted(interruptibleLockBlockingActions); |
356 |
> |
} |
357 |
> |
|
358 |
> |
/** |
359 |
> |
* interruptible operations throw InterruptedException when read locked and interrupted |
360 |
> |
*/ |
361 |
> |
public void testInterruptibleOperationsThrowInterruptedExceptionReadLockedInterrupted() { |
362 |
> |
final StampedLock lock = new StampedLock(); |
363 |
> |
long s = lock.readLock(); |
364 |
> |
|
365 |
> |
Action[] interruptibleLockBlockingActions = { |
366 |
> |
() -> lock.writeLockInterruptibly(), |
367 |
> |
() -> lock.tryWriteLock(Long.MAX_VALUE, DAYS), |
368 |
> |
() -> lock.asWriteLock().lockInterruptibly(), |
369 |
> |
() -> lock.asWriteLock().tryLock(Long.MAX_VALUE, DAYS), |
370 |
> |
}; |
371 |
> |
shuffle(interruptibleLockBlockingActions); |
372 |
> |
|
373 |
> |
assertThrowInterruptedExceptionWhenInterrupted(interruptibleLockBlockingActions); |
374 |
> |
} |
375 |
> |
|
376 |
> |
/** |
377 |
> |
* Non-interruptible operations ignore and preserve interrupt status |
378 |
> |
*/ |
379 |
> |
public void testNonInterruptibleOperationsIgnoreInterrupts() { |
380 |
> |
final StampedLock lock = new StampedLock(); |
381 |
> |
Thread.currentThread().interrupt(); |
382 |
> |
|
383 |
> |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
384 |
> |
long s = assertValid(lock, lock.readLock()); |
385 |
> |
readUnlocker.accept(lock, s); |
386 |
> |
s = assertValid(lock, lock.tryReadLock()); |
387 |
> |
readUnlocker.accept(lock, s); |
388 |
> |
} |
389 |
> |
|
390 |
> |
lock.asReadLock().lock(); |
391 |
> |
lock.asReadLock().unlock(); |
392 |
> |
|
393 |
> |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
394 |
> |
long s = assertValid(lock, lock.writeLock()); |
395 |
> |
writeUnlocker.accept(lock, s); |
396 |
> |
s = assertValid(lock, lock.tryWriteLock()); |
397 |
> |
writeUnlocker.accept(lock, s); |
398 |
> |
} |
399 |
> |
|
400 |
> |
lock.asWriteLock().lock(); |
401 |
> |
lock.asWriteLock().unlock(); |
402 |
> |
|
403 |
> |
assertTrue(Thread.interrupted()); |
404 |
> |
} |
405 |
> |
|
406 |
> |
/** |
407 |
> |
* tryWriteLock on an unlocked lock succeeds |
408 |
> |
*/ |
409 |
> |
public void testTryWriteLock() { |
410 |
> |
final StampedLock lock = new StampedLock(); |
411 |
> |
long s = lock.tryWriteLock(); |
412 |
> |
assertTrue(s != 0L); |
413 |
> |
assertTrue(lock.isWriteLocked()); |
414 |
> |
assertEquals(0L, lock.tryWriteLock()); |
415 |
> |
releaseWriteLock(lock, s); |
416 |
> |
} |
417 |
> |
|
418 |
> |
/** |
419 |
> |
* tryWriteLock fails if locked |
420 |
> |
*/ |
421 |
> |
public void testTryWriteLockWhenLocked() { |
422 |
> |
final StampedLock lock = new StampedLock(); |
423 |
> |
long s = lock.writeLock(); |
424 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
425 |
> |
public void realRun() { |
426 |
> |
assertEquals(0L, lock.tryWriteLock()); |
427 |
> |
}}); |
428 |
> |
|
429 |
> |
assertEquals(0L, lock.tryWriteLock()); |
430 |
> |
awaitTermination(t); |
431 |
> |
releaseWriteLock(lock, s); |
432 |
> |
} |
433 |
> |
|
434 |
> |
/** |
435 |
> |
* tryReadLock fails if write-locked |
436 |
> |
*/ |
437 |
> |
public void testTryReadLockWhenLocked() { |
438 |
> |
final StampedLock lock = new StampedLock(); |
439 |
> |
long s = lock.writeLock(); |
440 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
441 |
> |
public void realRun() { |
442 |
> |
assertEquals(0L, lock.tryReadLock()); |
443 |
> |
}}); |
444 |
> |
|
445 |
> |
assertEquals(0L, lock.tryReadLock()); |
446 |
> |
awaitTermination(t); |
447 |
> |
releaseWriteLock(lock, s); |
448 |
> |
} |
449 |
> |
|
450 |
> |
/** |
451 |
> |
* Multiple threads can hold a read lock when not write-locked |
452 |
> |
*/ |
453 |
> |
public void testMultipleReadLocks() { |
454 |
> |
final StampedLock lock = new StampedLock(); |
455 |
> |
final long s = lock.readLock(); |
456 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
457 |
> |
public void realRun() throws InterruptedException { |
458 |
> |
long s2 = lock.tryReadLock(); |
459 |
> |
assertValid(lock, s2); |
460 |
> |
lock.unlockRead(s2); |
461 |
> |
long s3 = lock.tryReadLock(LONG_DELAY_MS, MILLISECONDS); |
462 |
> |
assertValid(lock, s3); |
463 |
> |
lock.unlockRead(s3); |
464 |
> |
long s4 = lock.readLock(); |
465 |
> |
assertValid(lock, s4); |
466 |
> |
lock.unlockRead(s4); |
467 |
> |
lock.asReadLock().lock(); |
468 |
> |
lock.asReadLock().unlock(); |
469 |
> |
lock.asReadLock().lockInterruptibly(); |
470 |
> |
lock.asReadLock().unlock(); |
471 |
> |
lock.asReadLock().tryLock(Long.MIN_VALUE, DAYS); |
472 |
> |
lock.asReadLock().unlock(); |
473 |
> |
}}); |
474 |
> |
|
475 |
> |
awaitTermination(t); |
476 |
> |
lock.unlockRead(s); |
477 |
> |
} |
478 |
|
|
479 |
+ |
/** |
480 |
+ |
* writeLock() succeeds only after a reading thread unlocks |
481 |
+ |
*/ |
482 |
+ |
public void testWriteAfterReadLock() throws InterruptedException { |
483 |
+ |
final CountDownLatch aboutToLock = new CountDownLatch(1); |
484 |
+ |
final StampedLock lock = new StampedLock(); |
485 |
+ |
long rs = lock.readLock(); |
486 |
+ |
Thread t = newStartedThread(new CheckedRunnable() { |
487 |
+ |
public void realRun() { |
488 |
+ |
aboutToLock.countDown(); |
489 |
+ |
long s = lock.writeLock(); |
490 |
+ |
assertTrue(lock.isWriteLocked()); |
491 |
+ |
assertFalse(lock.isReadLocked()); |
492 |
+ |
lock.unlockWrite(s); |
493 |
+ |
}}); |
494 |
+ |
|
495 |
+ |
await(aboutToLock); |
496 |
+ |
assertThreadBlocks(t, Thread.State.WAITING); |
497 |
+ |
assertFalse(lock.isWriteLocked()); |
498 |
+ |
assertTrue(lock.isReadLocked()); |
499 |
+ |
lock.unlockRead(rs); |
500 |
+ |
awaitTermination(t); |
501 |
+ |
assertUnlocked(lock); |
502 |
+ |
} |
503 |
+ |
|
504 |
+ |
/** |
505 |
+ |
* writeLock() succeeds only after reading threads unlock |
506 |
+ |
*/ |
507 |
+ |
public void testWriteAfterMultipleReadLocks() { |
508 |
+ |
final StampedLock lock = new StampedLock(); |
509 |
+ |
long s = lock.readLock(); |
510 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
511 |
+ |
public void realRun() { |
512 |
+ |
long rs = lock.readLock(); |
513 |
+ |
lock.unlockRead(rs); |
514 |
+ |
}}); |
515 |
+ |
|
516 |
+ |
awaitTermination(t1); |
517 |
+ |
|
518 |
+ |
Thread t2 = newStartedThread(new CheckedRunnable() { |
519 |
+ |
public void realRun() { |
520 |
+ |
long ws = lock.writeLock(); |
521 |
+ |
lock.unlockWrite(ws); |
522 |
+ |
}}); |
523 |
+ |
|
524 |
+ |
assertTrue(lock.isReadLocked()); |
525 |
+ |
assertFalse(lock.isWriteLocked()); |
526 |
+ |
lock.unlockRead(s); |
527 |
+ |
awaitTermination(t2); |
528 |
+ |
assertUnlocked(lock); |
529 |
+ |
} |
530 |
+ |
|
531 |
+ |
/** |
532 |
+ |
* readLock() succeed only after a writing thread unlocks |
533 |
+ |
*/ |
534 |
+ |
public void testReadAfterWriteLock() { |
535 |
+ |
final StampedLock lock = new StampedLock(); |
536 |
+ |
final CountDownLatch threadsStarted = new CountDownLatch(2); |
537 |
+ |
final long s = lock.writeLock(); |
538 |
+ |
final Runnable acquireReleaseReadLock = new CheckedRunnable() { |
539 |
+ |
public void realRun() { |
540 |
+ |
threadsStarted.countDown(); |
541 |
+ |
long rs = lock.readLock(); |
542 |
+ |
assertTrue(lock.isReadLocked()); |
543 |
+ |
assertFalse(lock.isWriteLocked()); |
544 |
+ |
lock.unlockRead(rs); |
545 |
+ |
}}; |
546 |
+ |
Thread t1 = newStartedThread(acquireReleaseReadLock); |
547 |
+ |
Thread t2 = newStartedThread(acquireReleaseReadLock); |
548 |
+ |
|
549 |
+ |
await(threadsStarted); |
550 |
+ |
assertThreadBlocks(t1, Thread.State.WAITING); |
551 |
+ |
assertThreadBlocks(t2, Thread.State.WAITING); |
552 |
+ |
assertTrue(lock.isWriteLocked()); |
553 |
+ |
assertFalse(lock.isReadLocked()); |
554 |
+ |
releaseWriteLock(lock, s); |
555 |
+ |
awaitTermination(t1); |
556 |
+ |
awaitTermination(t2); |
557 |
+ |
assertUnlocked(lock); |
558 |
+ |
} |
559 |
+ |
|
560 |
+ |
/** |
561 |
+ |
* tryReadLock succeeds if read locked but not write locked |
562 |
+ |
*/ |
563 |
+ |
public void testTryLockWhenReadLocked() { |
564 |
+ |
final StampedLock lock = new StampedLock(); |
565 |
+ |
long s = lock.readLock(); |
566 |
+ |
Thread t = newStartedThread(new CheckedRunnable() { |
567 |
+ |
public void realRun() { |
568 |
+ |
long rs = lock.tryReadLock(); |
569 |
+ |
assertValid(lock, rs); |
570 |
+ |
lock.unlockRead(rs); |
571 |
+ |
}}); |
572 |
+ |
|
573 |
+ |
awaitTermination(t); |
574 |
+ |
lock.unlockRead(s); |
575 |
+ |
} |
576 |
+ |
|
577 |
+ |
/** |
578 |
+ |
* tryWriteLock fails when read locked |
579 |
+ |
*/ |
580 |
+ |
public void testTryWriteLockWhenReadLocked() { |
581 |
+ |
final StampedLock lock = new StampedLock(); |
582 |
+ |
long s = lock.readLock(); |
583 |
+ |
Thread t = newStartedThread(new CheckedRunnable() { |
584 |
+ |
public void realRun() { |
585 |
+ |
threadAssertEquals(0L, lock.tryWriteLock()); |
586 |
+ |
}}); |
587 |
+ |
|
588 |
+ |
awaitTermination(t); |
589 |
+ |
lock.unlockRead(s); |
590 |
+ |
} |
591 |
+ |
|
592 |
+ |
/** |
593 |
+ |
* timed lock operations time out if lock not available |
594 |
+ |
*/ |
595 |
+ |
public void testTimedLock_Timeout() throws Exception { |
596 |
+ |
ArrayList<Future<?>> futures = new ArrayList<>(); |
597 |
+ |
|
598 |
+ |
// Write locked |
599 |
+ |
final StampedLock lock = new StampedLock(); |
600 |
+ |
long stamp = lock.writeLock(); |
601 |
+ |
assertEquals(0L, lock.tryReadLock(0L, DAYS)); |
602 |
+ |
assertEquals(0L, lock.tryReadLock(Long.MIN_VALUE, DAYS)); |
603 |
+ |
assertFalse(lock.asReadLock().tryLock(0L, DAYS)); |
604 |
+ |
assertFalse(lock.asReadLock().tryLock(Long.MIN_VALUE, DAYS)); |
605 |
+ |
assertEquals(0L, lock.tryWriteLock(0L, DAYS)); |
606 |
+ |
assertEquals(0L, lock.tryWriteLock(Long.MIN_VALUE, DAYS)); |
607 |
+ |
assertFalse(lock.asWriteLock().tryLock(0L, DAYS)); |
608 |
+ |
assertFalse(lock.asWriteLock().tryLock(Long.MIN_VALUE, DAYS)); |
609 |
+ |
|
610 |
+ |
futures.add(cachedThreadPool.submit(new CheckedRunnable() { |
611 |
+ |
public void realRun() throws InterruptedException { |
612 |
+ |
long startTime = System.nanoTime(); |
613 |
+ |
assertEquals(0L, lock.tryWriteLock(timeoutMillis(), MILLISECONDS)); |
614 |
+ |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
615 |
+ |
}})); |
616 |
+ |
|
617 |
+ |
futures.add(cachedThreadPool.submit(new CheckedRunnable() { |
618 |
+ |
public void realRun() throws InterruptedException { |
619 |
+ |
long startTime = System.nanoTime(); |
620 |
+ |
assertEquals(0L, lock.tryReadLock(timeoutMillis(), MILLISECONDS)); |
621 |
+ |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
622 |
+ |
}})); |
623 |
+ |
|
624 |
+ |
// Read locked |
625 |
+ |
final StampedLock lock2 = new StampedLock(); |
626 |
+ |
long stamp2 = lock2.readLock(); |
627 |
+ |
assertEquals(0L, lock2.tryWriteLock(0L, DAYS)); |
628 |
+ |
assertEquals(0L, lock2.tryWriteLock(Long.MIN_VALUE, DAYS)); |
629 |
+ |
assertFalse(lock2.asWriteLock().tryLock(0L, DAYS)); |
630 |
+ |
assertFalse(lock2.asWriteLock().tryLock(Long.MIN_VALUE, DAYS)); |
631 |
+ |
|
632 |
+ |
futures.add(cachedThreadPool.submit(new CheckedRunnable() { |
633 |
+ |
public void realRun() throws InterruptedException { |
634 |
+ |
long startTime = System.nanoTime(); |
635 |
+ |
assertEquals(0L, lock2.tryWriteLock(timeoutMillis(), MILLISECONDS)); |
636 |
+ |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
637 |
+ |
}})); |
638 |
+ |
|
639 |
+ |
for (Future<?> future : futures) |
640 |
+ |
assertNull(future.get()); |
641 |
+ |
|
642 |
+ |
releaseWriteLock(lock, stamp); |
643 |
+ |
releaseReadLock(lock2, stamp2); |
644 |
+ |
} |
645 |
+ |
|
646 |
+ |
/** |
647 |
+ |
* writeLockInterruptibly succeeds if unlocked |
648 |
+ |
*/ |
649 |
+ |
public void testWriteLockInterruptibly() throws InterruptedException { |
650 |
+ |
final StampedLock lock = new StampedLock(); |
651 |
+ |
long s = lock.writeLockInterruptibly(); |
652 |
+ |
assertTrue(lock.isWriteLocked()); |
653 |
+ |
releaseWriteLock(lock, s); |
654 |
+ |
} |
655 |
+ |
|
656 |
+ |
/** |
657 |
+ |
* readLockInterruptibly succeeds if lock free |
658 |
+ |
*/ |
659 |
+ |
public void testReadLockInterruptibly() throws InterruptedException { |
660 |
+ |
final StampedLock lock = new StampedLock(); |
661 |
+ |
|
662 |
+ |
long s = assertValid(lock, lock.readLockInterruptibly()); |
663 |
+ |
assertTrue(lock.isReadLocked()); |
664 |
+ |
lock.unlockRead(s); |
665 |
+ |
|
666 |
+ |
lock.asReadLock().lockInterruptibly(); |
667 |
+ |
assertTrue(lock.isReadLocked()); |
668 |
+ |
lock.asReadLock().unlock(); |
669 |
+ |
} |
670 |
+ |
|
671 |
+ |
/** |
672 |
+ |
* A serialized lock deserializes as unlocked |
673 |
+ |
*/ |
674 |
+ |
public void testSerialization() { |
675 |
+ |
StampedLock lock = new StampedLock(); |
676 |
+ |
lock.writeLock(); |
677 |
+ |
StampedLock clone = serialClone(lock); |
678 |
+ |
assertTrue(lock.isWriteLocked()); |
679 |
+ |
assertFalse(clone.isWriteLocked()); |
680 |
+ |
long s = clone.writeLock(); |
681 |
+ |
assertTrue(clone.isWriteLocked()); |
682 |
+ |
clone.unlockWrite(s); |
683 |
+ |
assertFalse(clone.isWriteLocked()); |
684 |
+ |
} |
685 |
+ |
|
686 |
+ |
/** |
687 |
+ |
* toString indicates current lock state |
688 |
+ |
*/ |
689 |
+ |
public void testToString() { |
690 |
+ |
StampedLock lock = new StampedLock(); |
691 |
+ |
assertTrue(lock.toString().contains("Unlocked")); |
692 |
+ |
long s = lock.writeLock(); |
693 |
+ |
assertTrue(lock.toString().contains("Write-locked")); |
694 |
+ |
lock.unlockWrite(s); |
695 |
+ |
s = lock.readLock(); |
696 |
+ |
assertTrue(lock.toString().contains("Read-locks")); |
697 |
+ |
} |
698 |
+ |
|
699 |
+ |
/** |
700 |
+ |
* tryOptimisticRead succeeds and validates if unlocked, fails if |
701 |
+ |
* exclusively locked |
702 |
+ |
*/ |
703 |
+ |
public void testValidateOptimistic() throws InterruptedException { |
704 |
+ |
StampedLock lock = new StampedLock(); |
705 |
+ |
|
706 |
+ |
assertValid(lock, lock.tryOptimisticRead()); |
707 |
+ |
|
708 |
+ |
for (Function<StampedLock, Long> writeLocker : writeLockers()) { |
709 |
+ |
long s = assertValid(lock, writeLocker.apply(lock)); |
710 |
+ |
assertEquals(0L, lock.tryOptimisticRead()); |
711 |
+ |
releaseWriteLock(lock, s); |
712 |
+ |
} |
713 |
+ |
|
714 |
+ |
for (Function<StampedLock, Long> readLocker : readLockers()) { |
715 |
+ |
long s = assertValid(lock, readLocker.apply(lock)); |
716 |
+ |
long p = assertValid(lock, lock.tryOptimisticRead()); |
717 |
+ |
releaseReadLock(lock, s); |
718 |
+ |
assertTrue(lock.validate(p)); |
719 |
+ |
} |
720 |
+ |
|
721 |
+ |
assertValid(lock, lock.tryOptimisticRead()); |
722 |
+ |
} |
723 |
+ |
|
724 |
+ |
/** |
725 |
+ |
* tryOptimisticRead stamp does not validate if a write lock intervenes |
726 |
+ |
*/ |
727 |
+ |
public void testValidateOptimisticWriteLocked() { |
728 |
+ |
final StampedLock lock = new StampedLock(); |
729 |
+ |
final long p = assertValid(lock, lock.tryOptimisticRead()); |
730 |
+ |
final long s = assertValid(lock, lock.writeLock()); |
731 |
+ |
assertFalse(lock.validate(p)); |
732 |
+ |
assertEquals(0L, lock.tryOptimisticRead()); |
733 |
+ |
assertTrue(lock.validate(s)); |
734 |
+ |
lock.unlockWrite(s); |
735 |
+ |
} |
736 |
+ |
|
737 |
+ |
/** |
738 |
+ |
* tryOptimisticRead stamp does not validate if a write lock |
739 |
+ |
* intervenes in another thread |
740 |
+ |
*/ |
741 |
+ |
public void testValidateOptimisticWriteLocked2() |
742 |
+ |
throws InterruptedException { |
743 |
+ |
final CountDownLatch locked = new CountDownLatch(1); |
744 |
+ |
final StampedLock lock = new StampedLock(); |
745 |
+ |
final long p = assertValid(lock, lock.tryOptimisticRead()); |
746 |
+ |
|
747 |
+ |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
748 |
+ |
public void realRun() throws InterruptedException { |
749 |
+ |
lock.writeLockInterruptibly(); |
750 |
+ |
locked.countDown(); |
751 |
+ |
lock.writeLockInterruptibly(); |
752 |
+ |
}}); |
753 |
+ |
|
754 |
+ |
await(locked); |
755 |
+ |
assertFalse(lock.validate(p)); |
756 |
+ |
assertEquals(0L, lock.tryOptimisticRead()); |
757 |
+ |
assertThreadBlocks(t, Thread.State.WAITING); |
758 |
+ |
t.interrupt(); |
759 |
+ |
awaitTermination(t); |
760 |
+ |
assertTrue(lock.isWriteLocked()); |
761 |
+ |
} |
762 |
+ |
|
763 |
+ |
/** |
764 |
+ |
* tryConvertToOptimisticRead succeeds and validates if successfully locked |
765 |
+ |
*/ |
766 |
+ |
public void testTryConvertToOptimisticRead() throws InterruptedException { |
767 |
+ |
StampedLock lock = new StampedLock(); |
768 |
+ |
long s, p, q; |
769 |
+ |
assertEquals(0L, lock.tryConvertToOptimisticRead(0L)); |
770 |
+ |
|
771 |
+ |
s = assertValid(lock, lock.tryOptimisticRead()); |
772 |
+ |
assertEquals(s, lock.tryConvertToOptimisticRead(s)); |
773 |
+ |
assertTrue(lock.validate(s)); |
774 |
+ |
|
775 |
+ |
for (Function<StampedLock, Long> writeLocker : writeLockers()) { |
776 |
+ |
s = assertValid(lock, writeLocker.apply(lock)); |
777 |
+ |
p = assertValid(lock, lock.tryConvertToOptimisticRead(s)); |
778 |
+ |
assertFalse(lock.validate(s)); |
779 |
+ |
assertTrue(lock.validate(p)); |
780 |
+ |
assertUnlocked(lock); |
781 |
+ |
} |
782 |
+ |
|
783 |
+ |
for (Function<StampedLock, Long> readLocker : readLockers()) { |
784 |
+ |
s = assertValid(lock, readLocker.apply(lock)); |
785 |
+ |
q = assertValid(lock, lock.tryOptimisticRead()); |
786 |
+ |
assertEquals(q, lock.tryConvertToOptimisticRead(q)); |
787 |
+ |
assertTrue(lock.validate(q)); |
788 |
+ |
assertTrue(lock.isReadLocked()); |
789 |
+ |
p = assertValid(lock, lock.tryConvertToOptimisticRead(s)); |
790 |
+ |
assertTrue(lock.validate(p)); |
791 |
+ |
assertTrue(lock.validate(s)); |
792 |
+ |
assertUnlocked(lock); |
793 |
+ |
assertEquals(q, lock.tryConvertToOptimisticRead(q)); |
794 |
+ |
assertTrue(lock.validate(q)); |
795 |
+ |
} |
796 |
+ |
} |
797 |
+ |
|
798 |
+ |
/** |
799 |
+ |
* tryConvertToReadLock succeeds for valid stamps |
800 |
+ |
*/ |
801 |
+ |
public void testTryConvertToReadLock() throws InterruptedException { |
802 |
+ |
StampedLock lock = new StampedLock(); |
803 |
+ |
long s, p; |
804 |
+ |
|
805 |
+ |
assertEquals(0L, lock.tryConvertToReadLock(0L)); |
806 |
+ |
|
807 |
+ |
s = assertValid(lock, lock.tryOptimisticRead()); |
808 |
+ |
p = assertValid(lock, lock.tryConvertToReadLock(s)); |
809 |
+ |
assertTrue(lock.isReadLocked()); |
810 |
+ |
assertEquals(1, lock.getReadLockCount()); |
811 |
+ |
assertTrue(lock.validate(s)); |
812 |
+ |
lock.unlockRead(p); |
813 |
+ |
|
814 |
+ |
s = assertValid(lock, lock.tryOptimisticRead()); |
815 |
+ |
lock.readLock(); |
816 |
+ |
p = assertValid(lock, lock.tryConvertToReadLock(s)); |
817 |
+ |
assertTrue(lock.isReadLocked()); |
818 |
+ |
assertEquals(2, lock.getReadLockCount()); |
819 |
+ |
lock.unlockRead(p); |
820 |
+ |
lock.unlockRead(p); |
821 |
+ |
assertUnlocked(lock); |
822 |
+ |
|
823 |
+ |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
824 |
+ |
for (Function<StampedLock, Long> writeLocker : writeLockers()) { |
825 |
+ |
s = assertValid(lock, writeLocker.apply(lock)); |
826 |
+ |
p = assertValid(lock, lock.tryConvertToReadLock(s)); |
827 |
+ |
assertFalse(lock.validate(s)); |
828 |
+ |
assertTrue(lock.isReadLocked()); |
829 |
+ |
assertEquals(1, lock.getReadLockCount()); |
830 |
+ |
readUnlocker.accept(lock, p); |
831 |
+ |
} |
832 |
+ |
|
833 |
+ |
for (Function<StampedLock, Long> readLocker : readLockers()) { |
834 |
+ |
s = assertValid(lock, readLocker.apply(lock)); |
835 |
+ |
assertEquals(s, lock.tryConvertToReadLock(s)); |
836 |
+ |
assertTrue(lock.validate(s)); |
837 |
+ |
assertTrue(lock.isReadLocked()); |
838 |
+ |
assertEquals(1, lock.getReadLockCount()); |
839 |
+ |
readUnlocker.accept(lock, s); |
840 |
+ |
} |
841 |
+ |
} |
842 |
+ |
} |
843 |
+ |
|
844 |
+ |
/** |
845 |
+ |
* tryConvertToWriteLock succeeds if lock available; fails if multiply read locked |
846 |
+ |
*/ |
847 |
+ |
public void testTryConvertToWriteLock() throws InterruptedException { |
848 |
+ |
StampedLock lock = new StampedLock(); |
849 |
+ |
long s, p; |
850 |
+ |
|
851 |
+ |
assertEquals(0L, lock.tryConvertToWriteLock(0L)); |
852 |
+ |
|
853 |
+ |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
854 |
+ |
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
855 |
+ |
assertTrue(lock.isWriteLocked()); |
856 |
+ |
lock.unlockWrite(p); |
857 |
+ |
|
858 |
+ |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
859 |
+ |
for (Function<StampedLock, Long> writeLocker : writeLockers()) { |
860 |
+ |
s = assertValid(lock, writeLocker.apply(lock)); |
861 |
+ |
assertEquals(s, lock.tryConvertToWriteLock(s)); |
862 |
+ |
assertTrue(lock.validate(s)); |
863 |
+ |
assertTrue(lock.isWriteLocked()); |
864 |
+ |
writeUnlocker.accept(lock, s); |
865 |
+ |
} |
866 |
+ |
|
867 |
+ |
for (Function<StampedLock, Long> readLocker : readLockers()) { |
868 |
+ |
s = assertValid(lock, readLocker.apply(lock)); |
869 |
+ |
p = assertValid(lock, lock.tryConvertToWriteLock(s)); |
870 |
+ |
assertFalse(lock.validate(s)); |
871 |
+ |
assertTrue(lock.validate(p)); |
872 |
+ |
assertTrue(lock.isWriteLocked()); |
873 |
+ |
writeUnlocker.accept(lock, p); |
874 |
+ |
} |
875 |
+ |
} |
876 |
+ |
|
877 |
+ |
// failure if multiply read locked |
878 |
+ |
for (Function<StampedLock, Long> readLocker : readLockers()) { |
879 |
+ |
s = assertValid(lock, readLocker.apply(lock)); |
880 |
+ |
p = assertValid(lock, readLocker.apply(lock)); |
881 |
+ |
assertEquals(0L, lock.tryConvertToWriteLock(s)); |
882 |
+ |
assertTrue(lock.validate(s)); |
883 |
+ |
assertTrue(lock.validate(p)); |
884 |
+ |
assertEquals(2, lock.getReadLockCount()); |
885 |
+ |
lock.unlock(p); |
886 |
+ |
lock.unlock(s); |
887 |
+ |
assertUnlocked(lock); |
888 |
+ |
} |
889 |
+ |
} |
890 |
+ |
|
891 |
+ |
/** |
892 |
+ |
* asWriteLock can be locked and unlocked |
893 |
+ |
*/ |
894 |
+ |
public void testAsWriteLock() throws Throwable { |
895 |
+ |
StampedLock sl = new StampedLock(); |
896 |
+ |
Lock lock = sl.asWriteLock(); |
897 |
+ |
for (Action locker : lockLockers(lock)) { |
898 |
+ |
locker.run(); |
899 |
+ |
assertTrue(sl.isWriteLocked()); |
900 |
+ |
assertFalse(sl.isReadLocked()); |
901 |
+ |
assertFalse(lock.tryLock()); |
902 |
+ |
lock.unlock(); |
903 |
+ |
assertUnlocked(sl); |
904 |
+ |
} |
905 |
+ |
} |
906 |
+ |
|
907 |
+ |
/** |
908 |
+ |
* asReadLock can be locked and unlocked |
909 |
+ |
*/ |
910 |
+ |
public void testAsReadLock() throws Throwable { |
911 |
+ |
StampedLock sl = new StampedLock(); |
912 |
+ |
Lock lock = sl.asReadLock(); |
913 |
+ |
for (Action locker : lockLockers(lock)) { |
914 |
+ |
locker.run(); |
915 |
+ |
assertTrue(sl.isReadLocked()); |
916 |
+ |
assertFalse(sl.isWriteLocked()); |
917 |
+ |
assertEquals(1, sl.getReadLockCount()); |
918 |
+ |
locker.run(); |
919 |
+ |
assertTrue(sl.isReadLocked()); |
920 |
+ |
assertEquals(2, sl.getReadLockCount()); |
921 |
+ |
lock.unlock(); |
922 |
+ |
lock.unlock(); |
923 |
+ |
assertUnlocked(sl); |
924 |
+ |
} |
925 |
+ |
} |
926 |
+ |
|
927 |
+ |
/** |
928 |
+ |
* asReadWriteLock.writeLock can be locked and unlocked |
929 |
+ |
*/ |
930 |
+ |
public void testAsReadWriteLockWriteLock() throws Throwable { |
931 |
+ |
StampedLock sl = new StampedLock(); |
932 |
+ |
Lock lock = sl.asReadWriteLock().writeLock(); |
933 |
+ |
for (Action locker : lockLockers(lock)) { |
934 |
+ |
locker.run(); |
935 |
+ |
assertTrue(sl.isWriteLocked()); |
936 |
+ |
assertFalse(sl.isReadLocked()); |
937 |
+ |
assertFalse(lock.tryLock()); |
938 |
+ |
lock.unlock(); |
939 |
+ |
assertUnlocked(sl); |
940 |
+ |
} |
941 |
+ |
} |
942 |
+ |
|
943 |
+ |
/** |
944 |
+ |
* asReadWriteLock.readLock can be locked and unlocked |
945 |
+ |
*/ |
946 |
+ |
public void testAsReadWriteLockReadLock() throws Throwable { |
947 |
+ |
StampedLock sl = new StampedLock(); |
948 |
+ |
Lock lock = sl.asReadWriteLock().readLock(); |
949 |
+ |
for (Action locker : lockLockers(lock)) { |
950 |
+ |
locker.run(); |
951 |
+ |
assertTrue(sl.isReadLocked()); |
952 |
+ |
assertFalse(sl.isWriteLocked()); |
953 |
+ |
assertEquals(1, sl.getReadLockCount()); |
954 |
+ |
locker.run(); |
955 |
+ |
assertTrue(sl.isReadLocked()); |
956 |
+ |
assertEquals(2, sl.getReadLockCount()); |
957 |
+ |
lock.unlock(); |
958 |
+ |
lock.unlock(); |
959 |
+ |
assertUnlocked(sl); |
960 |
+ |
} |
961 |
+ |
} |
962 |
+ |
|
963 |
+ |
/** |
964 |
+ |
* Lock.newCondition throws UnsupportedOperationException |
965 |
+ |
*/ |
966 |
+ |
public void testLockViewsDoNotSupportConditions() { |
967 |
+ |
StampedLock sl = new StampedLock(); |
968 |
+ |
assertThrows(UnsupportedOperationException.class, |
969 |
+ |
() -> sl.asWriteLock().newCondition(), |
970 |
+ |
() -> sl.asReadLock().newCondition(), |
971 |
+ |
() -> sl.asReadWriteLock().writeLock().newCondition(), |
972 |
+ |
() -> sl.asReadWriteLock().readLock().newCondition()); |
973 |
+ |
} |
974 |
+ |
|
975 |
+ |
/** |
976 |
+ |
* Passing optimistic read stamps to unlock operations result in |
977 |
+ |
* IllegalMonitorStateException |
978 |
+ |
*/ |
979 |
+ |
public void testCannotUnlockOptimisticReadStamps() { |
980 |
+ |
Runnable[] actions = { |
981 |
+ |
() -> { |
982 |
+ |
StampedLock sl = new StampedLock(); |
983 |
+ |
long stamp = assertValid(sl, sl.tryOptimisticRead()); |
984 |
+ |
sl.unlockRead(stamp); |
985 |
+ |
}, |
986 |
+ |
() -> { |
987 |
+ |
StampedLock sl = new StampedLock(); |
988 |
+ |
long stamp = sl.tryOptimisticRead(); |
989 |
+ |
sl.unlock(stamp); |
990 |
+ |
}, |
991 |
+ |
|
992 |
+ |
() -> { |
993 |
+ |
StampedLock sl = new StampedLock(); |
994 |
+ |
long stamp = sl.tryOptimisticRead(); |
995 |
+ |
sl.writeLock(); |
996 |
+ |
sl.unlock(stamp); |
997 |
+ |
}, |
998 |
+ |
() -> { |
999 |
+ |
StampedLock sl = new StampedLock(); |
1000 |
+ |
sl.readLock(); |
1001 |
+ |
long stamp = assertValid(sl, sl.tryOptimisticRead()); |
1002 |
+ |
sl.unlockRead(stamp); |
1003 |
+ |
}, |
1004 |
+ |
() -> { |
1005 |
+ |
StampedLock sl = new StampedLock(); |
1006 |
+ |
sl.readLock(); |
1007 |
+ |
long stamp = assertValid(sl, sl.tryOptimisticRead()); |
1008 |
+ |
sl.unlock(stamp); |
1009 |
+ |
}, |
1010 |
+ |
|
1011 |
+ |
() -> { |
1012 |
+ |
StampedLock sl = new StampedLock(); |
1013 |
+ |
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1014 |
+ |
assertValid(sl, stamp); |
1015 |
+ |
sl.writeLock(); |
1016 |
+ |
sl.unlockWrite(stamp); |
1017 |
+ |
}, |
1018 |
+ |
() -> { |
1019 |
+ |
StampedLock sl = new StampedLock(); |
1020 |
+ |
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1021 |
+ |
sl.writeLock(); |
1022 |
+ |
sl.unlock(stamp); |
1023 |
+ |
}, |
1024 |
+ |
() -> { |
1025 |
+ |
StampedLock sl = new StampedLock(); |
1026 |
+ |
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1027 |
+ |
sl.readLock(); |
1028 |
+ |
sl.unlockRead(stamp); |
1029 |
+ |
}, |
1030 |
+ |
() -> { |
1031 |
+ |
StampedLock sl = new StampedLock(); |
1032 |
+ |
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1033 |
+ |
sl.readLock(); |
1034 |
+ |
sl.unlock(stamp); |
1035 |
+ |
}, |
1036 |
+ |
|
1037 |
+ |
() -> { |
1038 |
+ |
StampedLock sl = new StampedLock(); |
1039 |
+ |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1040 |
+ |
assertValid(sl, stamp); |
1041 |
+ |
sl.writeLock(); |
1042 |
+ |
sl.unlockWrite(stamp); |
1043 |
+ |
}, |
1044 |
+ |
() -> { |
1045 |
+ |
StampedLock sl = new StampedLock(); |
1046 |
+ |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1047 |
+ |
sl.writeLock(); |
1048 |
+ |
sl.unlock(stamp); |
1049 |
+ |
}, |
1050 |
+ |
() -> { |
1051 |
+ |
StampedLock sl = new StampedLock(); |
1052 |
+ |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1053 |
+ |
sl.readLock(); |
1054 |
+ |
sl.unlockRead(stamp); |
1055 |
+ |
}, |
1056 |
+ |
() -> { |
1057 |
+ |
StampedLock sl = new StampedLock(); |
1058 |
+ |
sl.readLock(); |
1059 |
+ |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1060 |
+ |
assertValid(sl, stamp); |
1061 |
+ |
sl.readLock(); |
1062 |
+ |
sl.unlockRead(stamp); |
1063 |
+ |
}, |
1064 |
+ |
() -> { |
1065 |
+ |
StampedLock sl = new StampedLock(); |
1066 |
+ |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1067 |
+ |
sl.readLock(); |
1068 |
+ |
sl.unlock(stamp); |
1069 |
+ |
}, |
1070 |
+ |
() -> { |
1071 |
+ |
StampedLock sl = new StampedLock(); |
1072 |
+ |
sl.readLock(); |
1073 |
+ |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1074 |
+ |
sl.readLock(); |
1075 |
+ |
sl.unlock(stamp); |
1076 |
+ |
}, |
1077 |
+ |
}; |
1078 |
+ |
|
1079 |
+ |
assertThrows(IllegalMonitorStateException.class, actions); |
1080 |
+ |
} |
1081 |
+ |
|
1082 |
+ |
static long writeLockInterruptiblyUninterrupted(StampedLock sl) { |
1083 |
+ |
try { return sl.writeLockInterruptibly(); } |
1084 |
+ |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1085 |
+ |
} |
1086 |
+ |
|
1087 |
+ |
static long tryWriteLockUninterrupted(StampedLock sl, long time, TimeUnit unit) { |
1088 |
+ |
try { return sl.tryWriteLock(time, unit); } |
1089 |
+ |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1090 |
+ |
} |
1091 |
+ |
|
1092 |
+ |
static long readLockInterruptiblyUninterrupted(StampedLock sl) { |
1093 |
+ |
try { return sl.readLockInterruptibly(); } |
1094 |
+ |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1095 |
+ |
} |
1096 |
+ |
|
1097 |
+ |
static long tryReadLockUninterrupted(StampedLock sl, long time, TimeUnit unit) { |
1098 |
+ |
try { return sl.tryReadLock(time, unit); } |
1099 |
+ |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1100 |
+ |
} |
1101 |
+ |
|
1102 |
+ |
/** |
1103 |
+ |
* Invalid stamps result in IllegalMonitorStateException |
1104 |
+ |
*/ |
1105 |
+ |
public void testInvalidStampsThrowIllegalMonitorStateException() { |
1106 |
+ |
final StampedLock sl = new StampedLock(); |
1107 |
+ |
|
1108 |
+ |
assertThrows(IllegalMonitorStateException.class, |
1109 |
+ |
() -> sl.unlockWrite(0L), |
1110 |
+ |
() -> sl.unlockRead(0L), |
1111 |
+ |
() -> sl.unlock(0L)); |
1112 |
+ |
|
1113 |
+ |
final long optimisticStamp = sl.tryOptimisticRead(); |
1114 |
+ |
final long readStamp = sl.readLock(); |
1115 |
+ |
sl.unlockRead(readStamp); |
1116 |
+ |
final long writeStamp = sl.writeLock(); |
1117 |
+ |
sl.unlockWrite(writeStamp); |
1118 |
+ |
assertTrue(optimisticStamp != 0L && readStamp != 0L && writeStamp != 0L); |
1119 |
+ |
final long[] noLongerValidStamps = { optimisticStamp, readStamp, writeStamp }; |
1120 |
+ |
final Runnable assertNoLongerValidStampsThrow = () -> { |
1121 |
+ |
for (long noLongerValidStamp : noLongerValidStamps) |
1122 |
+ |
assertThrows(IllegalMonitorStateException.class, |
1123 |
+ |
() -> sl.unlockWrite(noLongerValidStamp), |
1124 |
+ |
() -> sl.unlockRead(noLongerValidStamp), |
1125 |
+ |
() -> sl.unlock(noLongerValidStamp)); |
1126 |
+ |
}; |
1127 |
+ |
assertNoLongerValidStampsThrow.run(); |
1128 |
+ |
|
1129 |
+ |
for (Function<StampedLock, Long> readLocker : readLockers()) |
1130 |
+ |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
1131 |
+ |
final long stamp = readLocker.apply(sl); |
1132 |
+ |
assertValid(sl, stamp); |
1133 |
+ |
assertNoLongerValidStampsThrow.run(); |
1134 |
+ |
assertThrows(IllegalMonitorStateException.class, |
1135 |
+ |
() -> sl.unlockWrite(stamp), |
1136 |
+ |
() -> sl.unlockRead(sl.tryOptimisticRead()), |
1137 |
+ |
() -> sl.unlockRead(0L)); |
1138 |
+ |
readUnlocker.accept(sl, stamp); |
1139 |
+ |
assertUnlocked(sl); |
1140 |
+ |
assertNoLongerValidStampsThrow.run(); |
1141 |
+ |
} |
1142 |
+ |
|
1143 |
+ |
for (Function<StampedLock, Long> writeLocker : writeLockers()) |
1144 |
+ |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
1145 |
+ |
final long stamp = writeLocker.apply(sl); |
1146 |
+ |
assertValid(sl, stamp); |
1147 |
+ |
assertNoLongerValidStampsThrow.run(); |
1148 |
+ |
assertThrows(IllegalMonitorStateException.class, |
1149 |
+ |
() -> sl.unlockRead(stamp), |
1150 |
+ |
() -> sl.unlockWrite(0L)); |
1151 |
+ |
writeUnlocker.accept(sl, stamp); |
1152 |
+ |
assertUnlocked(sl); |
1153 |
+ |
assertNoLongerValidStampsThrow.run(); |
1154 |
+ |
} |
1155 |
+ |
} |
1156 |
+ |
|
1157 |
+ |
/** |
1158 |
+ |
* Read locks can be very deeply nested |
1159 |
+ |
*/ |
1160 |
+ |
public void testDeeplyNestedReadLocks() { |
1161 |
+ |
final StampedLock lock = new StampedLock(); |
1162 |
+ |
final int depth = 300; |
1163 |
+ |
final long[] stamps = new long[depth]; |
1164 |
+ |
final List<Function<StampedLock, Long>> readLockers = readLockers(); |
1165 |
+ |
final List<BiConsumer<StampedLock, Long>> readUnlockers = readUnlockers(); |
1166 |
+ |
for (int i = 0; i < depth; i++) { |
1167 |
+ |
Function<StampedLock, Long> readLocker |
1168 |
+ |
= readLockers.get(i % readLockers.size()); |
1169 |
+ |
long stamp = readLocker.apply(lock); |
1170 |
+ |
assertEquals(i + 1, lock.getReadLockCount()); |
1171 |
+ |
assertTrue(lock.isReadLocked()); |
1172 |
+ |
stamps[i] = stamp; |
1173 |
+ |
} |
1174 |
+ |
for (int i = 0; i < depth; i++) { |
1175 |
+ |
BiConsumer<StampedLock, Long> readUnlocker |
1176 |
+ |
= readUnlockers.get(i % readUnlockers.size()); |
1177 |
+ |
assertEquals(depth - i, lock.getReadLockCount()); |
1178 |
+ |
assertTrue(lock.isReadLocked()); |
1179 |
+ |
readUnlocker.accept(lock, stamps[depth - 1 - i]); |
1180 |
+ |
} |
1181 |
+ |
assertUnlocked(lock); |
1182 |
+ |
} |
1183 |
+ |
|
1184 |
+ |
/** |
1185 |
+ |
* Stamped locks are not reentrant. |
1186 |
+ |
*/ |
1187 |
+ |
public void testNonReentrant() throws InterruptedException { |
1188 |
+ |
final StampedLock lock = new StampedLock(); |
1189 |
+ |
long stamp; |
1190 |
+ |
|
1191 |
+ |
stamp = lock.writeLock(); |
1192 |
+ |
assertValid(lock, stamp); |
1193 |
+ |
assertEquals(0L, lock.tryWriteLock(0L, DAYS)); |
1194 |
+ |
assertEquals(0L, lock.tryReadLock(0L, DAYS)); |
1195 |
+ |
assertValid(lock, stamp); |
1196 |
+ |
lock.unlockWrite(stamp); |
1197 |
+ |
|
1198 |
+ |
stamp = lock.tryWriteLock(1L, DAYS); |
1199 |
+ |
assertEquals(0L, lock.tryWriteLock(0L, DAYS)); |
1200 |
+ |
assertValid(lock, stamp); |
1201 |
+ |
lock.unlockWrite(stamp); |
1202 |
+ |
|
1203 |
+ |
stamp = lock.readLock(); |
1204 |
+ |
assertEquals(0L, lock.tryWriteLock(0L, DAYS)); |
1205 |
+ |
assertValid(lock, stamp); |
1206 |
+ |
lock.unlockRead(stamp); |
1207 |
+ |
} |
1208 |
+ |
|
1209 |
+ |
/** |
1210 |
+ |
* """StampedLocks have no notion of ownership. Locks acquired in |
1211 |
+ |
* one thread can be released or converted in another.""" |
1212 |
+ |
*/ |
1213 |
+ |
public void testNoOwnership() throws Throwable { |
1214 |
+ |
ArrayList<Future<?>> futures = new ArrayList<>(); |
1215 |
+ |
for (Function<StampedLock, Long> writeLocker : writeLockers()) |
1216 |
+ |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
1217 |
+ |
StampedLock lock = new StampedLock(); |
1218 |
+ |
long stamp = writeLocker.apply(lock); |
1219 |
+ |
futures.add(cachedThreadPool.submit(new CheckedRunnable() { |
1220 |
+ |
public void realRun() { |
1221 |
+ |
writeUnlocker.accept(lock, stamp); |
1222 |
+ |
assertUnlocked(lock); |
1223 |
+ |
assertFalse(lock.validate(stamp)); |
1224 |
+ |
}})); |
1225 |
+ |
} |
1226 |
+ |
for (Future<?> future : futures) |
1227 |
+ |
assertNull(future.get()); |
1228 |
+ |
} |
1229 |
|
} |