1 |
jsr166 |
1.1 |
/* |
2 |
|
|
* Written by Doug Lea and Martin Buchholz |
3 |
|
|
* with assistance from members of JCP JSR-166 Expert Group and |
4 |
|
|
* released to the public domain, as explained at |
5 |
|
|
* http://creativecommons.org/publicdomain/zero/1.0/ |
6 |
|
|
*/ |
7 |
|
|
|
8 |
jsr166 |
1.25 |
import static java.util.concurrent.TimeUnit.DAYS; |
9 |
jsr166 |
1.10 |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
10 |
|
|
|
11 |
jsr166 |
1.25 |
import java.util.ArrayList; |
12 |
|
|
import java.util.List; |
13 |
jsr166 |
1.10 |
import java.util.concurrent.CountDownLatch; |
14 |
jsr166 |
1.25 |
import java.util.concurrent.TimeUnit; |
15 |
jsr166 |
1.1 |
import java.util.concurrent.locks.Lock; |
16 |
jsr166 |
1.2 |
import java.util.concurrent.locks.StampedLock; |
17 |
jsr166 |
1.25 |
import java.util.function.BiConsumer; |
18 |
|
|
import java.util.function.Consumer; |
19 |
|
|
import java.util.function.Function; |
20 |
jsr166 |
1.10 |
|
21 |
|
|
import junit.framework.Test; |
22 |
|
|
import junit.framework.TestSuite; |
23 |
jsr166 |
1.1 |
|
24 |
|
|
public class StampedLockTest extends JSR166TestCase { |
25 |
|
|
public static void main(String[] args) { |
26 |
jsr166 |
1.13 |
main(suite(), args); |
27 |
jsr166 |
1.1 |
} |
28 |
|
|
public static Test suite() { |
29 |
|
|
return new TestSuite(StampedLockTest.class); |
30 |
|
|
} |
31 |
|
|
|
32 |
dl |
1.4 |
/** |
33 |
|
|
* A runnable calling writeLockInterruptibly |
34 |
|
|
*/ |
35 |
|
|
class InterruptibleLockRunnable extends CheckedRunnable { |
36 |
|
|
final StampedLock lock; |
37 |
|
|
InterruptibleLockRunnable(StampedLock l) { lock = l; } |
38 |
|
|
public void realRun() throws InterruptedException { |
39 |
|
|
lock.writeLockInterruptibly(); |
40 |
|
|
} |
41 |
|
|
} |
42 |
|
|
|
43 |
|
|
/** |
44 |
|
|
* A runnable calling writeLockInterruptibly that expects to be |
45 |
|
|
* interrupted |
46 |
|
|
*/ |
47 |
|
|
class InterruptedLockRunnable extends CheckedInterruptedRunnable { |
48 |
|
|
final StampedLock lock; |
49 |
|
|
InterruptedLockRunnable(StampedLock l) { lock = l; } |
50 |
|
|
public void realRun() throws InterruptedException { |
51 |
|
|
lock.writeLockInterruptibly(); |
52 |
|
|
} |
53 |
|
|
} |
54 |
|
|
|
55 |
|
|
/** |
56 |
|
|
* Releases write lock, checking isWriteLocked before and after |
57 |
|
|
*/ |
58 |
|
|
void releaseWriteLock(StampedLock lock, long s) { |
59 |
|
|
assertTrue(lock.isWriteLocked()); |
60 |
|
|
lock.unlockWrite(s); |
61 |
|
|
assertFalse(lock.isWriteLocked()); |
62 |
|
|
} |
63 |
|
|
|
64 |
|
|
/** |
65 |
|
|
* Constructed StampedLock is in unlocked state |
66 |
|
|
*/ |
67 |
|
|
public void testConstructor() { |
68 |
|
|
StampedLock lock; |
69 |
|
|
lock = new StampedLock(); |
70 |
|
|
assertFalse(lock.isWriteLocked()); |
71 |
|
|
assertFalse(lock.isReadLocked()); |
72 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
73 |
|
|
} |
74 |
|
|
|
75 |
|
|
/** |
76 |
|
|
* write-locking and read-locking an unlocked lock succeed |
77 |
|
|
*/ |
78 |
|
|
public void testLock() { |
79 |
|
|
StampedLock lock = new StampedLock(); |
80 |
|
|
assertFalse(lock.isWriteLocked()); |
81 |
|
|
assertFalse(lock.isReadLocked()); |
82 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
83 |
|
|
long s = lock.writeLock(); |
84 |
|
|
assertTrue(lock.isWriteLocked()); |
85 |
|
|
assertFalse(lock.isReadLocked()); |
86 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
87 |
|
|
lock.unlockWrite(s); |
88 |
|
|
assertFalse(lock.isWriteLocked()); |
89 |
|
|
assertFalse(lock.isReadLocked()); |
90 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
91 |
|
|
long rs = lock.readLock(); |
92 |
|
|
assertFalse(lock.isWriteLocked()); |
93 |
|
|
assertTrue(lock.isReadLocked()); |
94 |
|
|
assertEquals(lock.getReadLockCount(), 1); |
95 |
|
|
lock.unlockRead(rs); |
96 |
|
|
assertFalse(lock.isWriteLocked()); |
97 |
|
|
assertFalse(lock.isReadLocked()); |
98 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
99 |
|
|
} |
100 |
|
|
|
101 |
|
|
/** |
102 |
|
|
* unlock releases either a read or write lock |
103 |
|
|
*/ |
104 |
|
|
public void testUnlock() { |
105 |
|
|
StampedLock lock = new StampedLock(); |
106 |
|
|
assertFalse(lock.isWriteLocked()); |
107 |
|
|
assertFalse(lock.isReadLocked()); |
108 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
109 |
|
|
long s = lock.writeLock(); |
110 |
|
|
assertTrue(lock.isWriteLocked()); |
111 |
|
|
assertFalse(lock.isReadLocked()); |
112 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
113 |
|
|
lock.unlock(s); |
114 |
|
|
assertFalse(lock.isWriteLocked()); |
115 |
|
|
assertFalse(lock.isReadLocked()); |
116 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
117 |
|
|
long rs = lock.readLock(); |
118 |
|
|
assertFalse(lock.isWriteLocked()); |
119 |
|
|
assertTrue(lock.isReadLocked()); |
120 |
|
|
assertEquals(lock.getReadLockCount(), 1); |
121 |
|
|
lock.unlock(rs); |
122 |
|
|
assertFalse(lock.isWriteLocked()); |
123 |
|
|
assertFalse(lock.isReadLocked()); |
124 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
125 |
|
|
} |
126 |
|
|
|
127 |
|
|
/** |
128 |
|
|
* tryUnlockRead/Write succeeds if locked in associated mode else |
129 |
|
|
* returns false |
130 |
|
|
*/ |
131 |
|
|
public void testTryUnlock() { |
132 |
|
|
StampedLock lock = new StampedLock(); |
133 |
|
|
assertFalse(lock.isWriteLocked()); |
134 |
|
|
assertFalse(lock.isReadLocked()); |
135 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
136 |
|
|
long s = lock.writeLock(); |
137 |
|
|
assertTrue(lock.isWriteLocked()); |
138 |
|
|
assertFalse(lock.isReadLocked()); |
139 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
140 |
|
|
assertFalse(lock.tryUnlockRead()); |
141 |
|
|
assertTrue(lock.tryUnlockWrite()); |
142 |
|
|
assertFalse(lock.tryUnlockWrite()); |
143 |
|
|
assertFalse(lock.tryUnlockRead()); |
144 |
|
|
assertFalse(lock.isWriteLocked()); |
145 |
|
|
assertFalse(lock.isReadLocked()); |
146 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
147 |
|
|
long rs = lock.readLock(); |
148 |
|
|
assertFalse(lock.isWriteLocked()); |
149 |
|
|
assertTrue(lock.isReadLocked()); |
150 |
|
|
assertEquals(lock.getReadLockCount(), 1); |
151 |
|
|
assertFalse(lock.tryUnlockWrite()); |
152 |
|
|
assertTrue(lock.tryUnlockRead()); |
153 |
|
|
assertFalse(lock.tryUnlockRead()); |
154 |
|
|
assertFalse(lock.tryUnlockWrite()); |
155 |
|
|
assertFalse(lock.isWriteLocked()); |
156 |
|
|
assertFalse(lock.isReadLocked()); |
157 |
|
|
assertEquals(lock.getReadLockCount(), 0); |
158 |
|
|
} |
159 |
|
|
|
160 |
|
|
/** |
161 |
|
|
* write-unlocking an unlocked lock throws IllegalMonitorStateException |
162 |
|
|
*/ |
163 |
|
|
public void testWriteUnlock_IMSE() { |
164 |
|
|
StampedLock lock = new StampedLock(); |
165 |
|
|
try { |
166 |
|
|
lock.unlockWrite(0L); |
167 |
|
|
shouldThrow(); |
168 |
|
|
} catch (IllegalMonitorStateException success) {} |
169 |
|
|
} |
170 |
|
|
|
171 |
|
|
/** |
172 |
|
|
* write-unlocking an unlocked lock throws IllegalMonitorStateException |
173 |
|
|
*/ |
174 |
|
|
public void testWriteUnlock_IMSE2() { |
175 |
|
|
StampedLock lock = new StampedLock(); |
176 |
jsr166 |
1.14 |
long s = lock.writeLock(); |
177 |
|
|
lock.unlockWrite(s); |
178 |
dl |
1.4 |
try { |
179 |
|
|
lock.unlockWrite(s); |
180 |
|
|
shouldThrow(); |
181 |
|
|
} catch (IllegalMonitorStateException success) {} |
182 |
|
|
} |
183 |
|
|
|
184 |
|
|
/** |
185 |
|
|
* write-unlocking after readlock throws IllegalMonitorStateException |
186 |
|
|
*/ |
187 |
|
|
public void testWriteUnlock_IMSE3() { |
188 |
|
|
StampedLock lock = new StampedLock(); |
189 |
jsr166 |
1.14 |
long s = lock.readLock(); |
190 |
dl |
1.4 |
try { |
191 |
|
|
lock.unlockWrite(s); |
192 |
|
|
shouldThrow(); |
193 |
|
|
} catch (IllegalMonitorStateException success) {} |
194 |
|
|
} |
195 |
|
|
|
196 |
|
|
/** |
197 |
|
|
* read-unlocking an unlocked lock throws IllegalMonitorStateException |
198 |
|
|
*/ |
199 |
|
|
public void testReadUnlock_IMSE() { |
200 |
|
|
StampedLock lock = new StampedLock(); |
201 |
jsr166 |
1.14 |
long s = lock.readLock(); |
202 |
|
|
lock.unlockRead(s); |
203 |
dl |
1.4 |
try { |
204 |
|
|
lock.unlockRead(s); |
205 |
|
|
shouldThrow(); |
206 |
|
|
} catch (IllegalMonitorStateException success) {} |
207 |
|
|
} |
208 |
|
|
|
209 |
|
|
/** |
210 |
|
|
* read-unlocking an unlocked lock throws IllegalMonitorStateException |
211 |
|
|
*/ |
212 |
|
|
public void testReadUnlock_IMSE2() { |
213 |
|
|
StampedLock lock = new StampedLock(); |
214 |
|
|
try { |
215 |
|
|
lock.unlockRead(0L); |
216 |
|
|
shouldThrow(); |
217 |
|
|
} catch (IllegalMonitorStateException success) {} |
218 |
|
|
} |
219 |
|
|
|
220 |
|
|
/** |
221 |
|
|
* read-unlocking after writeLock throws IllegalMonitorStateException |
222 |
|
|
*/ |
223 |
|
|
public void testReadUnlock_IMSE3() { |
224 |
|
|
StampedLock lock = new StampedLock(); |
225 |
jsr166 |
1.14 |
long s = lock.writeLock(); |
226 |
dl |
1.4 |
try { |
227 |
|
|
lock.unlockRead(s); |
228 |
|
|
shouldThrow(); |
229 |
|
|
} catch (IllegalMonitorStateException success) {} |
230 |
|
|
} |
231 |
|
|
|
232 |
|
|
/** |
233 |
|
|
* validate(0) fails |
234 |
|
|
*/ |
235 |
|
|
public void testValidate0() { |
236 |
|
|
StampedLock lock = new StampedLock(); |
237 |
|
|
assertFalse(lock.validate(0L)); |
238 |
|
|
} |
239 |
|
|
|
240 |
|
|
/** |
241 |
|
|
* A stamp obtained from a successful lock operation validates |
242 |
|
|
*/ |
243 |
jsr166 |
1.11 |
public void testValidate() throws InterruptedException { |
244 |
|
|
StampedLock lock = new StampedLock(); |
245 |
|
|
long s = lock.writeLock(); |
246 |
|
|
assertTrue(lock.validate(s)); |
247 |
|
|
lock.unlockWrite(s); |
248 |
|
|
s = lock.readLock(); |
249 |
|
|
assertTrue(lock.validate(s)); |
250 |
|
|
lock.unlockRead(s); |
251 |
|
|
assertTrue((s = lock.tryWriteLock()) != 0L); |
252 |
|
|
assertTrue(lock.validate(s)); |
253 |
|
|
lock.unlockWrite(s); |
254 |
|
|
assertTrue((s = lock.tryReadLock()) != 0L); |
255 |
|
|
assertTrue(lock.validate(s)); |
256 |
|
|
lock.unlockRead(s); |
257 |
|
|
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
258 |
|
|
assertTrue(lock.validate(s)); |
259 |
|
|
lock.unlockWrite(s); |
260 |
|
|
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
261 |
|
|
assertTrue(lock.validate(s)); |
262 |
|
|
lock.unlockRead(s); |
263 |
|
|
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
264 |
dl |
1.4 |
} |
265 |
|
|
|
266 |
|
|
/** |
267 |
|
|
* A stamp obtained from an unsuccessful lock operation does not validate |
268 |
|
|
*/ |
269 |
jsr166 |
1.11 |
public void testValidate2() throws InterruptedException { |
270 |
|
|
StampedLock lock = new StampedLock(); |
271 |
|
|
long s; |
272 |
|
|
assertTrue((s = lock.writeLock()) != 0L); |
273 |
|
|
assertTrue(lock.validate(s)); |
274 |
|
|
assertFalse(lock.validate(lock.tryWriteLock())); |
275 |
|
|
assertFalse(lock.validate(lock.tryWriteLock(10L, MILLISECONDS))); |
276 |
|
|
assertFalse(lock.validate(lock.tryReadLock())); |
277 |
|
|
assertFalse(lock.validate(lock.tryReadLock(10L, MILLISECONDS))); |
278 |
|
|
assertFalse(lock.validate(lock.tryOptimisticRead())); |
279 |
|
|
lock.unlockWrite(s); |
280 |
dl |
1.4 |
} |
281 |
|
|
|
282 |
|
|
/** |
283 |
|
|
* writeLockInterruptibly is interruptible |
284 |
|
|
*/ |
285 |
jsr166 |
1.11 |
public void testWriteLockInterruptibly_Interruptible() |
286 |
|
|
throws InterruptedException { |
287 |
dl |
1.4 |
final CountDownLatch running = new CountDownLatch(1); |
288 |
|
|
final StampedLock lock = new StampedLock(); |
289 |
|
|
long s = lock.writeLock(); |
290 |
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
291 |
|
|
public void realRun() throws InterruptedException { |
292 |
|
|
running.countDown(); |
293 |
|
|
lock.writeLockInterruptibly(); |
294 |
|
|
}}); |
295 |
jsr166 |
1.12 |
|
296 |
jsr166 |
1.11 |
running.await(); |
297 |
|
|
waitForThreadToEnterWaitState(t, 100); |
298 |
|
|
t.interrupt(); |
299 |
|
|
awaitTermination(t); |
300 |
|
|
releaseWriteLock(lock, s); |
301 |
dl |
1.4 |
} |
302 |
|
|
|
303 |
|
|
/** |
304 |
|
|
* timed tryWriteLock is interruptible |
305 |
|
|
*/ |
306 |
jsr166 |
1.11 |
public void testWriteTryLock_Interruptible() throws InterruptedException { |
307 |
dl |
1.4 |
final CountDownLatch running = new CountDownLatch(1); |
308 |
|
|
final StampedLock lock = new StampedLock(); |
309 |
|
|
long s = lock.writeLock(); |
310 |
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
311 |
|
|
public void realRun() throws InterruptedException { |
312 |
|
|
running.countDown(); |
313 |
|
|
lock.tryWriteLock(2 * LONG_DELAY_MS, MILLISECONDS); |
314 |
|
|
}}); |
315 |
jsr166 |
1.12 |
|
316 |
jsr166 |
1.11 |
running.await(); |
317 |
|
|
waitForThreadToEnterWaitState(t, 100); |
318 |
|
|
t.interrupt(); |
319 |
|
|
awaitTermination(t); |
320 |
|
|
releaseWriteLock(lock, s); |
321 |
dl |
1.4 |
} |
322 |
|
|
|
323 |
|
|
/** |
324 |
|
|
* readLockInterruptibly is interruptible |
325 |
|
|
*/ |
326 |
jsr166 |
1.11 |
public void testReadLockInterruptibly_Interruptible() |
327 |
|
|
throws InterruptedException { |
328 |
dl |
1.4 |
final CountDownLatch running = new CountDownLatch(1); |
329 |
|
|
final StampedLock lock = new StampedLock(); |
330 |
|
|
long s = lock.writeLock(); |
331 |
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
332 |
|
|
public void realRun() throws InterruptedException { |
333 |
|
|
running.countDown(); |
334 |
|
|
lock.readLockInterruptibly(); |
335 |
|
|
}}); |
336 |
jsr166 |
1.12 |
|
337 |
jsr166 |
1.11 |
running.await(); |
338 |
|
|
waitForThreadToEnterWaitState(t, 100); |
339 |
|
|
t.interrupt(); |
340 |
|
|
awaitTermination(t); |
341 |
|
|
releaseWriteLock(lock, s); |
342 |
dl |
1.4 |
} |
343 |
|
|
|
344 |
|
|
/** |
345 |
|
|
* timed tryReadLock is interruptible |
346 |
|
|
*/ |
347 |
jsr166 |
1.11 |
public void testReadTryLock_Interruptible() throws InterruptedException { |
348 |
dl |
1.4 |
final CountDownLatch running = new CountDownLatch(1); |
349 |
|
|
final StampedLock lock = new StampedLock(); |
350 |
|
|
long s = lock.writeLock(); |
351 |
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
352 |
|
|
public void realRun() throws InterruptedException { |
353 |
|
|
running.countDown(); |
354 |
|
|
lock.tryReadLock(2 * LONG_DELAY_MS, MILLISECONDS); |
355 |
|
|
}}); |
356 |
jsr166 |
1.12 |
|
357 |
jsr166 |
1.11 |
running.await(); |
358 |
|
|
waitForThreadToEnterWaitState(t, 100); |
359 |
|
|
t.interrupt(); |
360 |
|
|
awaitTermination(t); |
361 |
|
|
releaseWriteLock(lock, s); |
362 |
dl |
1.4 |
} |
363 |
|
|
|
364 |
|
|
/** |
365 |
|
|
* tryWriteLock on an unlocked lock succeeds |
366 |
|
|
*/ |
367 |
|
|
public void testWriteTryLock() { |
368 |
|
|
final StampedLock lock = new StampedLock(); |
369 |
|
|
long s = lock.tryWriteLock(); |
370 |
|
|
assertTrue(s != 0L); |
371 |
|
|
assertTrue(lock.isWriteLocked()); |
372 |
|
|
long s2 = lock.tryWriteLock(); |
373 |
|
|
assertEquals(s2, 0L); |
374 |
|
|
releaseWriteLock(lock, s); |
375 |
|
|
} |
376 |
|
|
|
377 |
|
|
/** |
378 |
|
|
* tryWriteLock fails if locked |
379 |
|
|
*/ |
380 |
|
|
public void testWriteTryLockWhenLocked() { |
381 |
|
|
final StampedLock lock = new StampedLock(); |
382 |
|
|
long s = lock.writeLock(); |
383 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
384 |
|
|
public void realRun() { |
385 |
|
|
long ws = lock.tryWriteLock(); |
386 |
|
|
assertTrue(ws == 0L); |
387 |
|
|
}}); |
388 |
jsr166 |
1.12 |
|
389 |
dl |
1.4 |
awaitTermination(t); |
390 |
|
|
releaseWriteLock(lock, s); |
391 |
|
|
} |
392 |
|
|
|
393 |
|
|
/** |
394 |
|
|
* tryReadLock fails if write-locked |
395 |
|
|
*/ |
396 |
|
|
public void testReadTryLockWhenLocked() { |
397 |
|
|
final StampedLock lock = new StampedLock(); |
398 |
|
|
long s = lock.writeLock(); |
399 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
400 |
|
|
public void realRun() { |
401 |
|
|
long rs = lock.tryReadLock(); |
402 |
|
|
assertEquals(rs, 0L); |
403 |
|
|
}}); |
404 |
jsr166 |
1.12 |
|
405 |
dl |
1.4 |
awaitTermination(t); |
406 |
|
|
releaseWriteLock(lock, s); |
407 |
|
|
} |
408 |
|
|
|
409 |
|
|
/** |
410 |
|
|
* Multiple threads can hold a read lock when not write-locked |
411 |
|
|
*/ |
412 |
|
|
public void testMultipleReadLocks() { |
413 |
|
|
final StampedLock lock = new StampedLock(); |
414 |
|
|
final long s = lock.readLock(); |
415 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
416 |
|
|
public void realRun() throws InterruptedException { |
417 |
|
|
long s2 = lock.tryReadLock(); |
418 |
|
|
assertTrue(s2 != 0L); |
419 |
|
|
lock.unlockRead(s2); |
420 |
|
|
long s3 = lock.tryReadLock(LONG_DELAY_MS, MILLISECONDS); |
421 |
|
|
assertTrue(s3 != 0L); |
422 |
|
|
lock.unlockRead(s3); |
423 |
|
|
long s4 = lock.readLock(); |
424 |
|
|
lock.unlockRead(s4); |
425 |
|
|
}}); |
426 |
jsr166 |
1.12 |
|
427 |
dl |
1.4 |
awaitTermination(t); |
428 |
|
|
lock.unlockRead(s); |
429 |
|
|
} |
430 |
|
|
|
431 |
|
|
/** |
432 |
|
|
* A writelock succeeds only after a reading thread unlocks |
433 |
|
|
*/ |
434 |
jsr166 |
1.11 |
public void testWriteAfterReadLock() throws InterruptedException { |
435 |
dl |
1.4 |
final CountDownLatch running = new CountDownLatch(1); |
436 |
|
|
final StampedLock lock = new StampedLock(); |
437 |
|
|
long rs = lock.readLock(); |
438 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
439 |
|
|
public void realRun() { |
440 |
|
|
running.countDown(); |
441 |
|
|
long s = lock.writeLock(); |
442 |
|
|
lock.unlockWrite(s); |
443 |
|
|
}}); |
444 |
jsr166 |
1.12 |
|
445 |
jsr166 |
1.11 |
running.await(); |
446 |
|
|
waitForThreadToEnterWaitState(t, 100); |
447 |
|
|
assertFalse(lock.isWriteLocked()); |
448 |
|
|
lock.unlockRead(rs); |
449 |
|
|
awaitTermination(t); |
450 |
|
|
assertFalse(lock.isWriteLocked()); |
451 |
dl |
1.4 |
} |
452 |
|
|
|
453 |
|
|
/** |
454 |
|
|
* A writelock succeeds only after reading threads unlock |
455 |
|
|
*/ |
456 |
|
|
public void testWriteAfterMultipleReadLocks() { |
457 |
|
|
final StampedLock lock = new StampedLock(); |
458 |
|
|
long s = lock.readLock(); |
459 |
|
|
Thread t1 = newStartedThread(new CheckedRunnable() { |
460 |
|
|
public void realRun() { |
461 |
|
|
long rs = lock.readLock(); |
462 |
|
|
lock.unlockRead(rs); |
463 |
|
|
}}); |
464 |
jsr166 |
1.12 |
|
465 |
dl |
1.4 |
awaitTermination(t1); |
466 |
|
|
|
467 |
|
|
Thread t2 = newStartedThread(new CheckedRunnable() { |
468 |
|
|
public void realRun() { |
469 |
|
|
long ws = lock.writeLock(); |
470 |
|
|
lock.unlockWrite(ws); |
471 |
|
|
}}); |
472 |
jsr166 |
1.12 |
|
473 |
dl |
1.4 |
assertFalse(lock.isWriteLocked()); |
474 |
|
|
lock.unlockRead(s); |
475 |
|
|
awaitTermination(t2); |
476 |
|
|
assertFalse(lock.isWriteLocked()); |
477 |
|
|
} |
478 |
|
|
|
479 |
|
|
/** |
480 |
|
|
* Readlocks succeed only after a writing thread unlocks |
481 |
|
|
*/ |
482 |
|
|
public void testReadAfterWriteLock() { |
483 |
|
|
final StampedLock lock = new StampedLock(); |
484 |
|
|
final long s = lock.writeLock(); |
485 |
|
|
Thread t1 = newStartedThread(new CheckedRunnable() { |
486 |
|
|
public void realRun() { |
487 |
|
|
long rs = lock.readLock(); |
488 |
|
|
lock.unlockRead(rs); |
489 |
|
|
}}); |
490 |
|
|
Thread t2 = newStartedThread(new CheckedRunnable() { |
491 |
|
|
public void realRun() { |
492 |
|
|
long rs = lock.readLock(); |
493 |
|
|
lock.unlockRead(rs); |
494 |
|
|
}}); |
495 |
|
|
|
496 |
|
|
releaseWriteLock(lock, s); |
497 |
|
|
awaitTermination(t1); |
498 |
|
|
awaitTermination(t2); |
499 |
|
|
} |
500 |
|
|
|
501 |
|
|
/** |
502 |
|
|
* tryReadLock succeeds if readlocked but not writelocked |
503 |
|
|
*/ |
504 |
|
|
public void testTryLockWhenReadLocked() { |
505 |
|
|
final StampedLock lock = new StampedLock(); |
506 |
|
|
long s = lock.readLock(); |
507 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
508 |
|
|
public void realRun() { |
509 |
|
|
long rs = lock.tryReadLock(); |
510 |
|
|
threadAssertTrue(rs != 0L); |
511 |
|
|
lock.unlockRead(rs); |
512 |
|
|
}}); |
513 |
|
|
|
514 |
|
|
awaitTermination(t); |
515 |
|
|
lock.unlockRead(s); |
516 |
|
|
} |
517 |
|
|
|
518 |
|
|
/** |
519 |
|
|
* tryWriteLock fails when readlocked |
520 |
|
|
*/ |
521 |
|
|
public void testWriteTryLockWhenReadLocked() { |
522 |
|
|
final StampedLock lock = new StampedLock(); |
523 |
|
|
long s = lock.readLock(); |
524 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
525 |
|
|
public void realRun() { |
526 |
|
|
long ws = lock.tryWriteLock(); |
527 |
|
|
threadAssertEquals(ws, 0L); |
528 |
|
|
}}); |
529 |
|
|
|
530 |
|
|
awaitTermination(t); |
531 |
|
|
lock.unlockRead(s); |
532 |
|
|
} |
533 |
|
|
|
534 |
|
|
/** |
535 |
|
|
* timed tryWriteLock times out if locked |
536 |
|
|
*/ |
537 |
|
|
public void testWriteTryLock_Timeout() { |
538 |
|
|
final StampedLock lock = new StampedLock(); |
539 |
|
|
long s = lock.writeLock(); |
540 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
541 |
|
|
public void realRun() throws InterruptedException { |
542 |
|
|
long startTime = System.nanoTime(); |
543 |
|
|
long timeoutMillis = 10; |
544 |
|
|
long ws = lock.tryWriteLock(timeoutMillis, MILLISECONDS); |
545 |
|
|
assertEquals(ws, 0L); |
546 |
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
547 |
|
|
}}); |
548 |
|
|
|
549 |
|
|
awaitTermination(t); |
550 |
|
|
releaseWriteLock(lock, s); |
551 |
|
|
} |
552 |
|
|
|
553 |
|
|
/** |
554 |
|
|
* timed tryReadLock times out if write-locked |
555 |
|
|
*/ |
556 |
|
|
public void testReadTryLock_Timeout() { |
557 |
|
|
final StampedLock lock = new StampedLock(); |
558 |
|
|
long s = lock.writeLock(); |
559 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
560 |
|
|
public void realRun() throws InterruptedException { |
561 |
|
|
long startTime = System.nanoTime(); |
562 |
|
|
long timeoutMillis = 10; |
563 |
|
|
long rs = lock.tryReadLock(timeoutMillis, MILLISECONDS); |
564 |
|
|
assertEquals(rs, 0L); |
565 |
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
566 |
|
|
}}); |
567 |
jsr166 |
1.7 |
|
568 |
dl |
1.4 |
awaitTermination(t); |
569 |
|
|
assertTrue(lock.isWriteLocked()); |
570 |
|
|
lock.unlockWrite(s); |
571 |
|
|
} |
572 |
|
|
|
573 |
|
|
/** |
574 |
|
|
* writeLockInterruptibly succeeds if unlocked, else is interruptible |
575 |
|
|
*/ |
576 |
jsr166 |
1.11 |
public void testWriteLockInterruptibly() throws InterruptedException { |
577 |
dl |
1.4 |
final CountDownLatch running = new CountDownLatch(1); |
578 |
|
|
final StampedLock lock = new StampedLock(); |
579 |
jsr166 |
1.11 |
long s = lock.writeLockInterruptibly(); |
580 |
dl |
1.4 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
581 |
|
|
public void realRun() throws InterruptedException { |
582 |
|
|
running.countDown(); |
583 |
|
|
lock.writeLockInterruptibly(); |
584 |
|
|
}}); |
585 |
|
|
|
586 |
jsr166 |
1.11 |
running.await(); |
587 |
|
|
waitForThreadToEnterWaitState(t, 100); |
588 |
|
|
t.interrupt(); |
589 |
|
|
assertTrue(lock.isWriteLocked()); |
590 |
|
|
awaitTermination(t); |
591 |
|
|
releaseWriteLock(lock, s); |
592 |
dl |
1.4 |
} |
593 |
|
|
|
594 |
|
|
/** |
595 |
|
|
* readLockInterruptibly succeeds if lock free else is interruptible |
596 |
|
|
*/ |
597 |
jsr166 |
1.11 |
public void testReadLockInterruptibly() throws InterruptedException { |
598 |
dl |
1.4 |
final CountDownLatch running = new CountDownLatch(1); |
599 |
|
|
final StampedLock lock = new StampedLock(); |
600 |
jsr166 |
1.11 |
long s; |
601 |
|
|
s = lock.readLockInterruptibly(); |
602 |
|
|
lock.unlockRead(s); |
603 |
|
|
s = lock.writeLockInterruptibly(); |
604 |
dl |
1.4 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
605 |
|
|
public void realRun() throws InterruptedException { |
606 |
|
|
running.countDown(); |
607 |
|
|
lock.readLockInterruptibly(); |
608 |
|
|
}}); |
609 |
jsr166 |
1.12 |
|
610 |
jsr166 |
1.11 |
running.await(); |
611 |
|
|
waitForThreadToEnterWaitState(t, 100); |
612 |
|
|
t.interrupt(); |
613 |
|
|
awaitTermination(t); |
614 |
|
|
releaseWriteLock(lock, s); |
615 |
dl |
1.4 |
} |
616 |
|
|
|
617 |
|
|
/** |
618 |
|
|
* A serialized lock deserializes as unlocked |
619 |
|
|
*/ |
620 |
|
|
public void testSerialization() { |
621 |
|
|
StampedLock lock = new StampedLock(); |
622 |
|
|
lock.writeLock(); |
623 |
|
|
StampedLock clone = serialClone(lock); |
624 |
|
|
assertTrue(lock.isWriteLocked()); |
625 |
|
|
assertFalse(clone.isWriteLocked()); |
626 |
|
|
long s = clone.writeLock(); |
627 |
|
|
assertTrue(clone.isWriteLocked()); |
628 |
|
|
clone.unlockWrite(s); |
629 |
|
|
assertFalse(clone.isWriteLocked()); |
630 |
|
|
} |
631 |
dl |
1.5 |
|
632 |
dl |
1.4 |
/** |
633 |
|
|
* toString indicates current lock state |
634 |
|
|
*/ |
635 |
|
|
public void testToString() { |
636 |
|
|
StampedLock lock = new StampedLock(); |
637 |
|
|
assertTrue(lock.toString().contains("Unlocked")); |
638 |
|
|
long s = lock.writeLock(); |
639 |
|
|
assertTrue(lock.toString().contains("Write-locked")); |
640 |
|
|
lock.unlockWrite(s); |
641 |
|
|
s = lock.readLock(); |
642 |
|
|
assertTrue(lock.toString().contains("Read-locks")); |
643 |
|
|
} |
644 |
|
|
|
645 |
|
|
/** |
646 |
|
|
* tryOptimisticRead succeeds and validates if unlocked, fails if locked |
647 |
|
|
*/ |
648 |
jsr166 |
1.11 |
public void testValidateOptimistic() throws InterruptedException { |
649 |
|
|
StampedLock lock = new StampedLock(); |
650 |
|
|
long s, p; |
651 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
652 |
|
|
assertTrue(lock.validate(p)); |
653 |
|
|
assertTrue((s = lock.writeLock()) != 0L); |
654 |
|
|
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
655 |
|
|
assertTrue(lock.validate(s)); |
656 |
|
|
lock.unlockWrite(s); |
657 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
658 |
|
|
assertTrue(lock.validate(p)); |
659 |
|
|
assertTrue((s = lock.readLock()) != 0L); |
660 |
|
|
assertTrue(lock.validate(s)); |
661 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
662 |
|
|
assertTrue(lock.validate(p)); |
663 |
|
|
lock.unlockRead(s); |
664 |
|
|
assertTrue((s = lock.tryWriteLock()) != 0L); |
665 |
|
|
assertTrue(lock.validate(s)); |
666 |
|
|
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
667 |
|
|
lock.unlockWrite(s); |
668 |
|
|
assertTrue((s = lock.tryReadLock()) != 0L); |
669 |
|
|
assertTrue(lock.validate(s)); |
670 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
671 |
|
|
lock.unlockRead(s); |
672 |
|
|
assertTrue(lock.validate(p)); |
673 |
|
|
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
674 |
|
|
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
675 |
|
|
assertTrue(lock.validate(s)); |
676 |
|
|
lock.unlockWrite(s); |
677 |
|
|
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
678 |
|
|
assertTrue(lock.validate(s)); |
679 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
680 |
|
|
lock.unlockRead(s); |
681 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
682 |
dl |
1.4 |
} |
683 |
|
|
|
684 |
|
|
/** |
685 |
|
|
* tryOptimisticRead stamp does not validate if a write lock intervenes |
686 |
|
|
*/ |
687 |
|
|
public void testValidateOptimisticWriteLocked() { |
688 |
|
|
StampedLock lock = new StampedLock(); |
689 |
|
|
long s, p; |
690 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
691 |
|
|
assertTrue((s = lock.writeLock()) != 0L); |
692 |
|
|
assertFalse(lock.validate(p)); |
693 |
|
|
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
694 |
|
|
assertTrue(lock.validate(s)); |
695 |
|
|
lock.unlockWrite(s); |
696 |
|
|
} |
697 |
|
|
|
698 |
|
|
/** |
699 |
|
|
* tryOptimisticRead stamp does not validate if a write lock |
700 |
|
|
* intervenes in another thread |
701 |
|
|
*/ |
702 |
jsr166 |
1.11 |
public void testValidateOptimisticWriteLocked2() |
703 |
|
|
throws InterruptedException { |
704 |
dl |
1.4 |
final CountDownLatch running = new CountDownLatch(1); |
705 |
|
|
final StampedLock lock = new StampedLock(); |
706 |
|
|
long s, p; |
707 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
708 |
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
709 |
jsr166 |
1.11 |
public void realRun() throws InterruptedException { |
710 |
|
|
lock.writeLockInterruptibly(); |
711 |
|
|
running.countDown(); |
712 |
|
|
lock.writeLockInterruptibly(); |
713 |
|
|
}}); |
714 |
jsr166 |
1.12 |
|
715 |
jsr166 |
1.11 |
running.await(); |
716 |
|
|
assertFalse(lock.validate(p)); |
717 |
|
|
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
718 |
|
|
t.interrupt(); |
719 |
|
|
awaitTermination(t); |
720 |
dl |
1.4 |
} |
721 |
|
|
|
722 |
|
|
/** |
723 |
|
|
* tryConvertToOptimisticRead succeeds and validates if successfully locked, |
724 |
|
|
*/ |
725 |
jsr166 |
1.11 |
public void testTryConvertToOptimisticRead() throws InterruptedException { |
726 |
|
|
StampedLock lock = new StampedLock(); |
727 |
|
|
long s, p; |
728 |
jsr166 |
1.19 |
assertEquals(0L, lock.tryConvertToOptimisticRead(0L)); |
729 |
|
|
|
730 |
jsr166 |
1.11 |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
731 |
jsr166 |
1.19 |
assertEquals(s, lock.tryConvertToOptimisticRead(s)); |
732 |
|
|
assertTrue(lock.validate(s)); |
733 |
|
|
|
734 |
jsr166 |
1.20 |
assertTrue((p = lock.readLock()) != 0L); |
735 |
|
|
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
736 |
|
|
assertEquals(s, lock.tryConvertToOptimisticRead(s)); |
737 |
|
|
assertTrue(lock.validate(s)); |
738 |
|
|
lock.unlockRead(p); |
739 |
|
|
|
740 |
jsr166 |
1.11 |
assertTrue((s = lock.writeLock()) != 0L); |
741 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
742 |
|
|
assertTrue(lock.validate(p)); |
743 |
jsr166 |
1.19 |
|
744 |
jsr166 |
1.11 |
assertTrue((s = lock.readLock()) != 0L); |
745 |
|
|
assertTrue(lock.validate(s)); |
746 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
747 |
|
|
assertTrue(lock.validate(p)); |
748 |
jsr166 |
1.19 |
|
749 |
jsr166 |
1.11 |
assertTrue((s = lock.tryWriteLock()) != 0L); |
750 |
|
|
assertTrue(lock.validate(s)); |
751 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
752 |
|
|
assertTrue(lock.validate(p)); |
753 |
jsr166 |
1.19 |
|
754 |
jsr166 |
1.11 |
assertTrue((s = lock.tryReadLock()) != 0L); |
755 |
|
|
assertTrue(lock.validate(s)); |
756 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
757 |
|
|
assertTrue(lock.validate(p)); |
758 |
jsr166 |
1.19 |
|
759 |
jsr166 |
1.11 |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
760 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
761 |
|
|
assertTrue(lock.validate(p)); |
762 |
jsr166 |
1.19 |
|
763 |
jsr166 |
1.11 |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
764 |
|
|
assertTrue(lock.validate(s)); |
765 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
766 |
|
|
assertTrue(lock.validate(p)); |
767 |
dl |
1.4 |
} |
768 |
|
|
|
769 |
|
|
/** |
770 |
|
|
* tryConvertToReadLock succeeds and validates if successfully locked |
771 |
|
|
* or lock free; |
772 |
|
|
*/ |
773 |
jsr166 |
1.11 |
public void testTryConvertToReadLock() throws InterruptedException { |
774 |
|
|
StampedLock lock = new StampedLock(); |
775 |
|
|
long s, p; |
776 |
jsr166 |
1.22 |
|
777 |
|
|
assertFalse((p = lock.tryConvertToReadLock(0L)) != 0L); |
778 |
|
|
|
779 |
jsr166 |
1.11 |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
780 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
781 |
jsr166 |
1.22 |
assertTrue(lock.isReadLocked()); |
782 |
|
|
assertEquals(1, lock.getReadLockCount()); |
783 |
jsr166 |
1.11 |
lock.unlockRead(p); |
784 |
jsr166 |
1.22 |
|
785 |
jsr166 |
1.24 |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
786 |
|
|
lock.readLock(); |
787 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
788 |
|
|
assertTrue(lock.isReadLocked()); |
789 |
|
|
assertEquals(2, lock.getReadLockCount()); |
790 |
|
|
lock.unlockRead(p); |
791 |
|
|
lock.unlockRead(p); |
792 |
|
|
|
793 |
jsr166 |
1.11 |
assertTrue((s = lock.writeLock()) != 0L); |
794 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
795 |
|
|
assertTrue(lock.validate(p)); |
796 |
jsr166 |
1.22 |
assertTrue(lock.isReadLocked()); |
797 |
|
|
assertEquals(1, lock.getReadLockCount()); |
798 |
jsr166 |
1.11 |
lock.unlockRead(p); |
799 |
jsr166 |
1.22 |
|
800 |
jsr166 |
1.11 |
assertTrue((s = lock.readLock()) != 0L); |
801 |
|
|
assertTrue(lock.validate(s)); |
802 |
jsr166 |
1.22 |
assertEquals(s, lock.tryConvertToReadLock(s)); |
803 |
|
|
assertTrue(lock.validate(s)); |
804 |
|
|
assertTrue(lock.isReadLocked()); |
805 |
|
|
assertEquals(1, lock.getReadLockCount()); |
806 |
|
|
lock.unlockRead(s); |
807 |
|
|
|
808 |
jsr166 |
1.11 |
assertTrue((s = lock.tryWriteLock()) != 0L); |
809 |
|
|
assertTrue(lock.validate(s)); |
810 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
811 |
|
|
assertTrue(lock.validate(p)); |
812 |
jsr166 |
1.22 |
assertEquals(1, lock.getReadLockCount()); |
813 |
jsr166 |
1.11 |
lock.unlockRead(p); |
814 |
jsr166 |
1.22 |
|
815 |
jsr166 |
1.11 |
assertTrue((s = lock.tryReadLock()) != 0L); |
816 |
|
|
assertTrue(lock.validate(s)); |
817 |
jsr166 |
1.22 |
assertEquals(s, lock.tryConvertToReadLock(s)); |
818 |
|
|
assertTrue(lock.validate(s)); |
819 |
|
|
assertTrue(lock.isReadLocked()); |
820 |
|
|
assertEquals(1, lock.getReadLockCount()); |
821 |
|
|
lock.unlockRead(s); |
822 |
|
|
|
823 |
jsr166 |
1.11 |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
824 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
825 |
|
|
assertTrue(lock.validate(p)); |
826 |
jsr166 |
1.22 |
assertTrue(lock.isReadLocked()); |
827 |
|
|
assertEquals(1, lock.getReadLockCount()); |
828 |
jsr166 |
1.11 |
lock.unlockRead(p); |
829 |
jsr166 |
1.22 |
|
830 |
jsr166 |
1.11 |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
831 |
|
|
assertTrue(lock.validate(s)); |
832 |
jsr166 |
1.22 |
assertEquals(s, lock.tryConvertToReadLock(s)); |
833 |
|
|
assertTrue(lock.validate(s)); |
834 |
|
|
assertTrue(lock.isReadLocked()); |
835 |
|
|
assertEquals(1, lock.getReadLockCount()); |
836 |
|
|
lock.unlockRead(s); |
837 |
dl |
1.4 |
} |
838 |
|
|
|
839 |
|
|
/** |
840 |
|
|
* tryConvertToWriteLock succeeds and validates if successfully locked |
841 |
|
|
* or lock free; |
842 |
|
|
*/ |
843 |
jsr166 |
1.11 |
public void testTryConvertToWriteLock() throws InterruptedException { |
844 |
|
|
StampedLock lock = new StampedLock(); |
845 |
|
|
long s, p; |
846 |
jsr166 |
1.21 |
|
847 |
|
|
assertFalse((p = lock.tryConvertToWriteLock(0L)) != 0L); |
848 |
|
|
|
849 |
jsr166 |
1.11 |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
850 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
851 |
jsr166 |
1.23 |
assertTrue(lock.isWriteLocked()); |
852 |
jsr166 |
1.11 |
lock.unlockWrite(p); |
853 |
jsr166 |
1.21 |
|
854 |
jsr166 |
1.11 |
assertTrue((s = lock.writeLock()) != 0L); |
855 |
jsr166 |
1.21 |
assertEquals(s, lock.tryConvertToWriteLock(s)); |
856 |
|
|
assertTrue(lock.validate(s)); |
857 |
jsr166 |
1.23 |
assertTrue(lock.isWriteLocked()); |
858 |
jsr166 |
1.21 |
lock.unlockWrite(s); |
859 |
|
|
|
860 |
jsr166 |
1.11 |
assertTrue((s = lock.readLock()) != 0L); |
861 |
|
|
assertTrue(lock.validate(s)); |
862 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
863 |
|
|
assertTrue(lock.validate(p)); |
864 |
jsr166 |
1.23 |
assertTrue(lock.isWriteLocked()); |
865 |
jsr166 |
1.11 |
lock.unlockWrite(p); |
866 |
jsr166 |
1.21 |
|
867 |
jsr166 |
1.11 |
assertTrue((s = lock.tryWriteLock()) != 0L); |
868 |
|
|
assertTrue(lock.validate(s)); |
869 |
jsr166 |
1.21 |
assertEquals(s, lock.tryConvertToWriteLock(s)); |
870 |
|
|
assertTrue(lock.validate(s)); |
871 |
jsr166 |
1.23 |
assertTrue(lock.isWriteLocked()); |
872 |
jsr166 |
1.21 |
lock.unlockWrite(s); |
873 |
|
|
|
874 |
jsr166 |
1.11 |
assertTrue((s = lock.tryReadLock()) != 0L); |
875 |
|
|
assertTrue(lock.validate(s)); |
876 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
877 |
|
|
assertTrue(lock.validate(p)); |
878 |
jsr166 |
1.23 |
assertTrue(lock.isWriteLocked()); |
879 |
jsr166 |
1.11 |
lock.unlockWrite(p); |
880 |
jsr166 |
1.21 |
|
881 |
jsr166 |
1.11 |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
882 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
883 |
|
|
assertTrue(lock.validate(p)); |
884 |
jsr166 |
1.23 |
assertTrue(lock.isWriteLocked()); |
885 |
jsr166 |
1.11 |
lock.unlockWrite(p); |
886 |
jsr166 |
1.21 |
|
887 |
jsr166 |
1.11 |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
888 |
|
|
assertTrue(lock.validate(s)); |
889 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
890 |
|
|
assertTrue(lock.validate(p)); |
891 |
jsr166 |
1.23 |
assertTrue(lock.isWriteLocked()); |
892 |
jsr166 |
1.11 |
lock.unlockWrite(p); |
893 |
dl |
1.4 |
} |
894 |
|
|
|
895 |
|
|
/** |
896 |
|
|
* asWriteLock can be locked and unlocked |
897 |
|
|
*/ |
898 |
|
|
public void testAsWriteLock() { |
899 |
|
|
StampedLock sl = new StampedLock(); |
900 |
|
|
Lock lock = sl.asWriteLock(); |
901 |
|
|
lock.lock(); |
902 |
|
|
assertFalse(lock.tryLock()); |
903 |
|
|
lock.unlock(); |
904 |
|
|
assertTrue(lock.tryLock()); |
905 |
|
|
} |
906 |
|
|
|
907 |
|
|
/** |
908 |
|
|
* asReadLock can be locked and unlocked |
909 |
|
|
*/ |
910 |
|
|
public void testAsReadLock() { |
911 |
|
|
StampedLock sl = new StampedLock(); |
912 |
|
|
Lock lock = sl.asReadLock(); |
913 |
|
|
lock.lock(); |
914 |
|
|
lock.unlock(); |
915 |
|
|
assertTrue(lock.tryLock()); |
916 |
|
|
} |
917 |
|
|
|
918 |
|
|
/** |
919 |
|
|
* asReadWriteLock.writeLock can be locked and unlocked |
920 |
|
|
*/ |
921 |
|
|
public void testAsReadWriteLockWriteLock() { |
922 |
|
|
StampedLock sl = new StampedLock(); |
923 |
|
|
Lock lock = sl.asReadWriteLock().writeLock(); |
924 |
|
|
lock.lock(); |
925 |
|
|
assertFalse(lock.tryLock()); |
926 |
|
|
lock.unlock(); |
927 |
|
|
assertTrue(lock.tryLock()); |
928 |
|
|
} |
929 |
|
|
|
930 |
|
|
/** |
931 |
|
|
* asReadWriteLock.readLock can be locked and unlocked |
932 |
|
|
*/ |
933 |
|
|
public void testAsReadWriteLockReadLock() { |
934 |
|
|
StampedLock sl = new StampedLock(); |
935 |
|
|
Lock lock = sl.asReadWriteLock().readLock(); |
936 |
|
|
lock.lock(); |
937 |
|
|
lock.unlock(); |
938 |
|
|
assertTrue(lock.tryLock()); |
939 |
|
|
} |
940 |
jsr166 |
1.1 |
|
941 |
jsr166 |
1.15 |
/** |
942 |
|
|
* Lock.newCondition throws UnsupportedOperationException |
943 |
|
|
*/ |
944 |
|
|
public void testLockViewsDoNotSupportConditions() { |
945 |
|
|
StampedLock sl = new StampedLock(); |
946 |
|
|
assertThrows(UnsupportedOperationException.class, |
947 |
|
|
() -> sl.asWriteLock().newCondition(), |
948 |
|
|
() -> sl.asReadLock().newCondition(), |
949 |
|
|
() -> sl.asReadWriteLock().writeLock().newCondition(), |
950 |
|
|
() -> sl.asReadWriteLock().readLock().newCondition()); |
951 |
|
|
} |
952 |
|
|
|
953 |
jsr166 |
1.16 |
/** |
954 |
|
|
* Passing optimistic read stamps to unlock operations result in |
955 |
|
|
* IllegalMonitorStateException |
956 |
|
|
*/ |
957 |
|
|
public void testCannotUnlockOptimisticReadStamps() { |
958 |
|
|
Runnable[] actions = { |
959 |
|
|
() -> { |
960 |
|
|
StampedLock sl = new StampedLock(); |
961 |
|
|
long stamp = sl.tryOptimisticRead(); |
962 |
|
|
assertTrue(stamp != 0); |
963 |
|
|
sl.unlockRead(stamp); |
964 |
|
|
}, |
965 |
|
|
() -> { |
966 |
|
|
StampedLock sl = new StampedLock(); |
967 |
|
|
long stamp = sl.tryOptimisticRead(); |
968 |
|
|
sl.unlock(stamp); |
969 |
|
|
}, |
970 |
|
|
|
971 |
|
|
() -> { |
972 |
|
|
StampedLock sl = new StampedLock(); |
973 |
|
|
long stamp = sl.tryOptimisticRead(); |
974 |
|
|
sl.writeLock(); |
975 |
|
|
sl.unlock(stamp); |
976 |
|
|
}, |
977 |
|
|
() -> { |
978 |
|
|
StampedLock sl = new StampedLock(); |
979 |
|
|
long stamp = sl.tryOptimisticRead(); |
980 |
|
|
sl.readLock(); |
981 |
|
|
sl.unlockRead(stamp); |
982 |
|
|
}, |
983 |
|
|
() -> { |
984 |
|
|
StampedLock sl = new StampedLock(); |
985 |
|
|
long stamp = sl.tryOptimisticRead(); |
986 |
|
|
sl.readLock(); |
987 |
|
|
sl.unlock(stamp); |
988 |
|
|
}, |
989 |
|
|
|
990 |
|
|
() -> { |
991 |
|
|
StampedLock sl = new StampedLock(); |
992 |
|
|
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
993 |
|
|
assertTrue(stamp != 0); |
994 |
|
|
sl.writeLock(); |
995 |
|
|
sl.unlockWrite(stamp); |
996 |
|
|
}, |
997 |
|
|
() -> { |
998 |
|
|
StampedLock sl = new StampedLock(); |
999 |
|
|
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1000 |
|
|
sl.writeLock(); |
1001 |
|
|
sl.unlock(stamp); |
1002 |
|
|
}, |
1003 |
|
|
() -> { |
1004 |
|
|
StampedLock sl = new StampedLock(); |
1005 |
|
|
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1006 |
|
|
sl.readLock(); |
1007 |
|
|
sl.unlockRead(stamp); |
1008 |
|
|
}, |
1009 |
|
|
() -> { |
1010 |
|
|
StampedLock sl = new StampedLock(); |
1011 |
|
|
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1012 |
|
|
sl.readLock(); |
1013 |
|
|
sl.unlock(stamp); |
1014 |
|
|
}, |
1015 |
|
|
|
1016 |
|
|
() -> { |
1017 |
|
|
StampedLock sl = new StampedLock(); |
1018 |
|
|
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1019 |
|
|
assertTrue(stamp != 0); |
1020 |
|
|
sl.writeLock(); |
1021 |
|
|
sl.unlockWrite(stamp); |
1022 |
|
|
}, |
1023 |
|
|
() -> { |
1024 |
|
|
StampedLock sl = new StampedLock(); |
1025 |
|
|
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1026 |
|
|
sl.writeLock(); |
1027 |
|
|
sl.unlock(stamp); |
1028 |
|
|
}, |
1029 |
|
|
() -> { |
1030 |
|
|
StampedLock sl = new StampedLock(); |
1031 |
|
|
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1032 |
|
|
sl.readLock(); |
1033 |
|
|
sl.unlockRead(stamp); |
1034 |
|
|
}, |
1035 |
|
|
() -> { |
1036 |
|
|
StampedLock sl = new StampedLock(); |
1037 |
jsr166 |
1.18 |
sl.readLock(); |
1038 |
|
|
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1039 |
|
|
assertTrue(stamp != 0); |
1040 |
|
|
sl.readLock(); |
1041 |
|
|
sl.unlockRead(stamp); |
1042 |
|
|
}, |
1043 |
|
|
() -> { |
1044 |
|
|
StampedLock sl = new StampedLock(); |
1045 |
|
|
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1046 |
|
|
sl.readLock(); |
1047 |
|
|
sl.unlock(stamp); |
1048 |
|
|
}, |
1049 |
|
|
() -> { |
1050 |
|
|
StampedLock sl = new StampedLock(); |
1051 |
|
|
sl.readLock(); |
1052 |
jsr166 |
1.16 |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1053 |
|
|
sl.readLock(); |
1054 |
|
|
sl.unlock(stamp); |
1055 |
|
|
}, |
1056 |
|
|
}; |
1057 |
jsr166 |
1.17 |
|
1058 |
jsr166 |
1.16 |
assertThrows(IllegalMonitorStateException.class, actions); |
1059 |
|
|
} |
1060 |
|
|
|
1061 |
jsr166 |
1.25 |
static long writeLockInterruptiblyUninterrupted(StampedLock sl) { |
1062 |
|
|
try { return sl.writeLockInterruptibly(); } |
1063 |
|
|
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1064 |
|
|
} |
1065 |
|
|
|
1066 |
|
|
static long tryWriteLockUninterrupted(StampedLock sl, long time, TimeUnit unit) { |
1067 |
|
|
try { return sl.tryWriteLock(time, unit); } |
1068 |
|
|
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1069 |
|
|
} |
1070 |
|
|
|
1071 |
|
|
/** |
1072 |
|
|
* Invalid write stamps result in IllegalMonitorStateException |
1073 |
|
|
*/ |
1074 |
|
|
public void testInvalidWriteStampsThrowIllegalMonitorStateException() { |
1075 |
|
|
List<Function<StampedLock, Long>> writeLockers = new ArrayList<>(); |
1076 |
|
|
writeLockers.add((sl) -> sl.writeLock()); |
1077 |
|
|
writeLockers.add((sl) -> writeLockInterruptiblyUninterrupted(sl)); |
1078 |
|
|
writeLockers.add((sl) -> tryWriteLockUninterrupted(sl, Long.MIN_VALUE, DAYS)); |
1079 |
|
|
writeLockers.add((sl) -> tryWriteLockUninterrupted(sl, 0, DAYS)); |
1080 |
|
|
|
1081 |
|
|
List<Consumer<StampedLock>> mutaters = new ArrayList<>(); |
1082 |
|
|
mutaters.add((sl) -> {}); |
1083 |
|
|
mutaters.add((sl) -> sl.readLock()); |
1084 |
|
|
for (Function<StampedLock, Long> writeLocker : writeLockers) |
1085 |
|
|
mutaters.add((sl) -> writeLocker.apply(sl)); |
1086 |
|
|
|
1087 |
|
|
List<BiConsumer<StampedLock, Long>> writeUnlockers = new ArrayList<>(); |
1088 |
|
|
writeUnlockers.add((sl, stamp) -> sl.unlockWrite(stamp)); |
1089 |
|
|
writeUnlockers.add((sl, stamp) -> assertTrue(sl.tryUnlockWrite())); |
1090 |
|
|
writeUnlockers.add((sl, stamp) -> sl.asWriteLock().unlock()); |
1091 |
|
|
writeUnlockers.add((sl, stamp) -> sl.unlock(stamp)); |
1092 |
|
|
|
1093 |
|
|
for (Function<StampedLock, Long> writeLocker : writeLockers) |
1094 |
|
|
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers) |
1095 |
|
|
for (Consumer<StampedLock> mutater : mutaters) { |
1096 |
|
|
StampedLock sl = new StampedLock(); |
1097 |
|
|
long stamp = writeLocker.apply(sl); |
1098 |
|
|
assertTrue(stamp != 0L); |
1099 |
|
|
assertThrows(IllegalMonitorStateException.class, |
1100 |
|
|
() -> sl.unlockRead(stamp)); |
1101 |
|
|
writeUnlocker.accept(sl, stamp); |
1102 |
|
|
mutater.accept(sl); |
1103 |
|
|
assertThrows(IllegalMonitorStateException.class, |
1104 |
|
|
() -> sl.unlock(stamp), |
1105 |
|
|
() -> sl.unlockRead(stamp), |
1106 |
|
|
() -> sl.unlockWrite(stamp)); |
1107 |
|
|
} |
1108 |
|
|
} |
1109 |
|
|
|
1110 |
jsr166 |
1.1 |
} |