5 |
|
* http://creativecommons.org/publicdomain/zero/1.0/ |
6 |
|
*/ |
7 |
|
|
8 |
+ |
import static java.util.concurrent.TimeUnit.DAYS; |
9 |
|
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
10 |
+ |
import static java.util.concurrent.TimeUnit.SECONDS; |
11 |
|
|
12 |
+ |
import java.util.ArrayList; |
13 |
+ |
import java.util.List; |
14 |
|
import java.util.concurrent.CountDownLatch; |
15 |
+ |
import java.util.concurrent.Future; |
16 |
+ |
import java.util.concurrent.TimeUnit; |
17 |
|
import java.util.concurrent.locks.Lock; |
18 |
|
import java.util.concurrent.locks.StampedLock; |
19 |
+ |
import java.util.function.BiConsumer; |
20 |
+ |
import java.util.function.Function; |
21 |
|
|
22 |
|
import junit.framework.Test; |
23 |
|
import junit.framework.TestSuite; |
31 |
|
} |
32 |
|
|
33 |
|
/** |
26 |
– |
* A runnable calling writeLockInterruptibly |
27 |
– |
*/ |
28 |
– |
class InterruptibleLockRunnable extends CheckedRunnable { |
29 |
– |
final StampedLock lock; |
30 |
– |
InterruptibleLockRunnable(StampedLock l) { lock = l; } |
31 |
– |
public void realRun() throws InterruptedException { |
32 |
– |
lock.writeLockInterruptibly(); |
33 |
– |
} |
34 |
– |
} |
35 |
– |
|
36 |
– |
/** |
37 |
– |
* A runnable calling writeLockInterruptibly that expects to be |
38 |
– |
* interrupted |
39 |
– |
*/ |
40 |
– |
class InterruptedLockRunnable extends CheckedInterruptedRunnable { |
41 |
– |
final StampedLock lock; |
42 |
– |
InterruptedLockRunnable(StampedLock l) { lock = l; } |
43 |
– |
public void realRun() throws InterruptedException { |
44 |
– |
lock.writeLockInterruptibly(); |
45 |
– |
} |
46 |
– |
} |
47 |
– |
|
48 |
– |
/** |
34 |
|
* Releases write lock, checking isWriteLocked before and after |
35 |
|
*/ |
36 |
< |
void releaseWriteLock(StampedLock lock, long s) { |
36 |
> |
void releaseWriteLock(StampedLock lock, long stamp) { |
37 |
|
assertTrue(lock.isWriteLocked()); |
38 |
< |
lock.unlockWrite(s); |
38 |
> |
assertValid(lock, stamp); |
39 |
> |
lock.unlockWrite(stamp); |
40 |
|
assertFalse(lock.isWriteLocked()); |
41 |
+ |
assertFalse(lock.validate(stamp)); |
42 |
|
} |
43 |
|
|
44 |
|
/** |
45 |
< |
* Constructed StampedLock is in unlocked state |
45 |
> |
* Releases read lock, checking isReadLocked before and after |
46 |
|
*/ |
47 |
< |
public void testConstructor() { |
48 |
< |
StampedLock lock; |
49 |
< |
lock = new StampedLock(); |
50 |
< |
assertFalse(lock.isWriteLocked()); |
47 |
> |
void releaseReadLock(StampedLock lock, long stamp) { |
48 |
> |
assertTrue(lock.isReadLocked()); |
49 |
> |
assertValid(lock, stamp); |
50 |
> |
lock.unlockRead(stamp); |
51 |
|
assertFalse(lock.isReadLocked()); |
52 |
< |
assertEquals(lock.getReadLockCount(), 0); |
52 |
> |
assertTrue(lock.validate(stamp)); |
53 |
|
} |
54 |
|
|
55 |
< |
/** |
56 |
< |
* write-locking and read-locking an unlocked lock succeed |
57 |
< |
*/ |
71 |
< |
public void testLock() { |
72 |
< |
StampedLock lock = new StampedLock(); |
73 |
< |
assertFalse(lock.isWriteLocked()); |
74 |
< |
assertFalse(lock.isReadLocked()); |
75 |
< |
assertEquals(lock.getReadLockCount(), 0); |
76 |
< |
long s = lock.writeLock(); |
77 |
< |
assertTrue(lock.isWriteLocked()); |
78 |
< |
assertFalse(lock.isReadLocked()); |
79 |
< |
assertEquals(lock.getReadLockCount(), 0); |
80 |
< |
lock.unlockWrite(s); |
81 |
< |
assertFalse(lock.isWriteLocked()); |
82 |
< |
assertFalse(lock.isReadLocked()); |
83 |
< |
assertEquals(lock.getReadLockCount(), 0); |
84 |
< |
long rs = lock.readLock(); |
85 |
< |
assertFalse(lock.isWriteLocked()); |
86 |
< |
assertTrue(lock.isReadLocked()); |
87 |
< |
assertEquals(lock.getReadLockCount(), 1); |
88 |
< |
lock.unlockRead(rs); |
89 |
< |
assertFalse(lock.isWriteLocked()); |
90 |
< |
assertFalse(lock.isReadLocked()); |
91 |
< |
assertEquals(lock.getReadLockCount(), 0); |
55 |
> |
long assertNonZero(long v) { |
56 |
> |
assertTrue(v != 0L); |
57 |
> |
return v; |
58 |
|
} |
59 |
|
|
60 |
< |
/** |
61 |
< |
* unlock releases either a read or write lock |
62 |
< |
*/ |
63 |
< |
public void testUnlock() { |
98 |
< |
StampedLock lock = new StampedLock(); |
99 |
< |
assertFalse(lock.isWriteLocked()); |
100 |
< |
assertFalse(lock.isReadLocked()); |
101 |
< |
assertEquals(lock.getReadLockCount(), 0); |
102 |
< |
long s = lock.writeLock(); |
103 |
< |
assertTrue(lock.isWriteLocked()); |
104 |
< |
assertFalse(lock.isReadLocked()); |
105 |
< |
assertEquals(lock.getReadLockCount(), 0); |
106 |
< |
lock.unlock(s); |
107 |
< |
assertFalse(lock.isWriteLocked()); |
108 |
< |
assertFalse(lock.isReadLocked()); |
109 |
< |
assertEquals(lock.getReadLockCount(), 0); |
110 |
< |
long rs = lock.readLock(); |
111 |
< |
assertFalse(lock.isWriteLocked()); |
112 |
< |
assertTrue(lock.isReadLocked()); |
113 |
< |
assertEquals(lock.getReadLockCount(), 1); |
114 |
< |
lock.unlock(rs); |
115 |
< |
assertFalse(lock.isWriteLocked()); |
116 |
< |
assertFalse(lock.isReadLocked()); |
117 |
< |
assertEquals(lock.getReadLockCount(), 0); |
60 |
> |
long assertValid(StampedLock lock, long stamp) { |
61 |
> |
assertTrue(stamp != 0L); |
62 |
> |
assertTrue(lock.validate(stamp)); |
63 |
> |
return stamp; |
64 |
|
} |
65 |
|
|
66 |
< |
/** |
121 |
< |
* tryUnlockRead/Write succeeds if locked in associated mode else |
122 |
< |
* returns false |
123 |
< |
*/ |
124 |
< |
public void testTryUnlock() { |
125 |
< |
StampedLock lock = new StampedLock(); |
126 |
< |
assertFalse(lock.isWriteLocked()); |
66 |
> |
void assertUnlocked(StampedLock lock) { |
67 |
|
assertFalse(lock.isReadLocked()); |
128 |
– |
assertEquals(lock.getReadLockCount(), 0); |
129 |
– |
long s = lock.writeLock(); |
130 |
– |
assertTrue(lock.isWriteLocked()); |
131 |
– |
assertFalse(lock.isReadLocked()); |
132 |
– |
assertEquals(lock.getReadLockCount(), 0); |
133 |
– |
assertFalse(lock.tryUnlockRead()); |
134 |
– |
assertTrue(lock.tryUnlockWrite()); |
135 |
– |
assertFalse(lock.tryUnlockWrite()); |
136 |
– |
assertFalse(lock.tryUnlockRead()); |
68 |
|
assertFalse(lock.isWriteLocked()); |
69 |
< |
assertFalse(lock.isReadLocked()); |
70 |
< |
assertEquals(lock.getReadLockCount(), 0); |
140 |
< |
long rs = lock.readLock(); |
141 |
< |
assertFalse(lock.isWriteLocked()); |
142 |
< |
assertTrue(lock.isReadLocked()); |
143 |
< |
assertEquals(lock.getReadLockCount(), 1); |
144 |
< |
assertFalse(lock.tryUnlockWrite()); |
145 |
< |
assertTrue(lock.tryUnlockRead()); |
146 |
< |
assertFalse(lock.tryUnlockRead()); |
147 |
< |
assertFalse(lock.tryUnlockWrite()); |
148 |
< |
assertFalse(lock.isWriteLocked()); |
149 |
< |
assertFalse(lock.isReadLocked()); |
150 |
< |
assertEquals(lock.getReadLockCount(), 0); |
69 |
> |
assertEquals(0, lock.getReadLockCount()); |
70 |
> |
assertValid(lock, lock.tryOptimisticRead()); |
71 |
|
} |
72 |
|
|
73 |
< |
/** |
74 |
< |
* write-unlocking an unlocked lock throws IllegalMonitorStateException |
75 |
< |
*/ |
76 |
< |
public void testWriteUnlock_IMSE() { |
77 |
< |
StampedLock lock = new StampedLock(); |
78 |
< |
try { |
79 |
< |
lock.unlockWrite(0L); |
80 |
< |
shouldThrow(); |
81 |
< |
} catch (IllegalMonitorStateException success) {} |
73 |
> |
List<Action> lockLockers(Lock lock) { |
74 |
> |
List<Action> lockers = new ArrayList<>(); |
75 |
> |
lockers.add(() -> lock.lock()); |
76 |
> |
lockers.add(() -> lock.lockInterruptibly()); |
77 |
> |
lockers.add(() -> lock.tryLock()); |
78 |
> |
lockers.add(() -> lock.tryLock(Long.MIN_VALUE, DAYS)); |
79 |
> |
lockers.add(() -> lock.tryLock(0L, DAYS)); |
80 |
> |
lockers.add(() -> lock.tryLock(Long.MAX_VALUE, DAYS)); |
81 |
> |
return lockers; |
82 |
> |
} |
83 |
> |
|
84 |
> |
List<Function<StampedLock, Long>> readLockers() { |
85 |
> |
List<Function<StampedLock, Long>> readLockers = new ArrayList<>(); |
86 |
> |
readLockers.add(sl -> sl.readLock()); |
87 |
> |
readLockers.add(sl -> sl.tryReadLock()); |
88 |
> |
readLockers.add(sl -> readLockInterruptiblyUninterrupted(sl)); |
89 |
> |
readLockers.add(sl -> tryReadLockUninterrupted(sl, Long.MIN_VALUE, DAYS)); |
90 |
> |
readLockers.add(sl -> tryReadLockUninterrupted(sl, 0L, DAYS)); |
91 |
> |
readLockers.add(sl -> sl.tryConvertToReadLock(sl.tryOptimisticRead())); |
92 |
> |
return readLockers; |
93 |
> |
} |
94 |
> |
|
95 |
> |
List<BiConsumer<StampedLock, Long>> readUnlockers() { |
96 |
> |
List<BiConsumer<StampedLock, Long>> readUnlockers = new ArrayList<>(); |
97 |
> |
readUnlockers.add((sl, stamp) -> sl.unlockRead(stamp)); |
98 |
> |
readUnlockers.add((sl, stamp) -> assertTrue(sl.tryUnlockRead())); |
99 |
> |
readUnlockers.add((sl, stamp) -> sl.asReadLock().unlock()); |
100 |
> |
readUnlockers.add((sl, stamp) -> sl.unlock(stamp)); |
101 |
> |
readUnlockers.add((sl, stamp) -> assertValid(sl, sl.tryConvertToOptimisticRead(stamp))); |
102 |
> |
return readUnlockers; |
103 |
> |
} |
104 |
> |
|
105 |
> |
List<Function<StampedLock, Long>> writeLockers() { |
106 |
> |
List<Function<StampedLock, Long>> writeLockers = new ArrayList<>(); |
107 |
> |
writeLockers.add(sl -> sl.writeLock()); |
108 |
> |
writeLockers.add(sl -> sl.tryWriteLock()); |
109 |
> |
writeLockers.add(sl -> writeLockInterruptiblyUninterrupted(sl)); |
110 |
> |
writeLockers.add(sl -> tryWriteLockUninterrupted(sl, Long.MIN_VALUE, DAYS)); |
111 |
> |
writeLockers.add(sl -> tryWriteLockUninterrupted(sl, 0L, DAYS)); |
112 |
> |
writeLockers.add(sl -> sl.tryConvertToWriteLock(sl.tryOptimisticRead())); |
113 |
> |
return writeLockers; |
114 |
> |
} |
115 |
> |
|
116 |
> |
List<BiConsumer<StampedLock, Long>> writeUnlockers() { |
117 |
> |
List<BiConsumer<StampedLock, Long>> writeUnlockers = new ArrayList<>(); |
118 |
> |
writeUnlockers.add((sl, stamp) -> sl.unlockWrite(stamp)); |
119 |
> |
writeUnlockers.add((sl, stamp) -> assertTrue(sl.tryUnlockWrite())); |
120 |
> |
writeUnlockers.add((sl, stamp) -> sl.asWriteLock().unlock()); |
121 |
> |
writeUnlockers.add((sl, stamp) -> sl.unlock(stamp)); |
122 |
> |
writeUnlockers.add((sl, stamp) -> assertValid(sl, sl.tryConvertToOptimisticRead(stamp))); |
123 |
> |
return writeUnlockers; |
124 |
|
} |
125 |
|
|
126 |
|
/** |
127 |
< |
* write-unlocking an unlocked lock throws IllegalMonitorStateException |
127 |
> |
* Constructed StampedLock is in unlocked state |
128 |
|
*/ |
129 |
< |
public void testWriteUnlock_IMSE2() { |
130 |
< |
StampedLock lock = new StampedLock(); |
169 |
< |
long s = lock.writeLock(); |
170 |
< |
lock.unlockWrite(s); |
171 |
< |
try { |
172 |
< |
lock.unlockWrite(s); |
173 |
< |
shouldThrow(); |
174 |
< |
} catch (IllegalMonitorStateException success) {} |
129 |
> |
public void testConstructor() { |
130 |
> |
assertUnlocked(new StampedLock()); |
131 |
|
} |
132 |
|
|
133 |
|
/** |
134 |
< |
* write-unlocking after readlock throws IllegalMonitorStateException |
134 |
> |
* write-locking, then unlocking, an unlocked lock succeed |
135 |
|
*/ |
136 |
< |
public void testWriteUnlock_IMSE3() { |
136 |
> |
public void testWriteLock_lockUnlock() { |
137 |
|
StampedLock lock = new StampedLock(); |
138 |
< |
long s = lock.readLock(); |
139 |
< |
try { |
140 |
< |
lock.unlockWrite(s); |
141 |
< |
shouldThrow(); |
142 |
< |
} catch (IllegalMonitorStateException success) {} |
138 |
> |
|
139 |
> |
for (Function<StampedLock, Long> writeLocker : writeLockers()) |
140 |
> |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
141 |
> |
assertFalse(lock.isWriteLocked()); |
142 |
> |
assertFalse(lock.isReadLocked()); |
143 |
> |
assertEquals(0, lock.getReadLockCount()); |
144 |
> |
|
145 |
> |
long s = writeLocker.apply(lock); |
146 |
> |
assertValid(lock, s); |
147 |
> |
assertTrue(lock.isWriteLocked()); |
148 |
> |
assertFalse(lock.isReadLocked()); |
149 |
> |
assertEquals(0, lock.getReadLockCount()); |
150 |
> |
writeUnlocker.accept(lock, s); |
151 |
> |
assertUnlocked(lock); |
152 |
> |
} |
153 |
|
} |
154 |
|
|
155 |
|
/** |
156 |
< |
* read-unlocking an unlocked lock throws IllegalMonitorStateException |
156 |
> |
* read-locking, then unlocking, an unlocked lock succeed |
157 |
|
*/ |
158 |
< |
public void testReadUnlock_IMSE() { |
158 |
> |
public void testReadLock_lockUnlock() { |
159 |
|
StampedLock lock = new StampedLock(); |
160 |
< |
long s = lock.readLock(); |
161 |
< |
lock.unlockRead(s); |
162 |
< |
try { |
163 |
< |
lock.unlockRead(s); |
164 |
< |
shouldThrow(); |
165 |
< |
} catch (IllegalMonitorStateException success) {} |
160 |
> |
|
161 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) |
162 |
> |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
163 |
> |
long s = 42; |
164 |
> |
for (int i = 0; i < 2; i++) { |
165 |
> |
s = assertValid(lock, readLocker.apply(lock)); |
166 |
> |
assertFalse(lock.isWriteLocked()); |
167 |
> |
assertTrue(lock.isReadLocked()); |
168 |
> |
assertEquals(i + 1, lock.getReadLockCount()); |
169 |
> |
} |
170 |
> |
for (int i = 0; i < 2; i++) { |
171 |
> |
assertFalse(lock.isWriteLocked()); |
172 |
> |
assertTrue(lock.isReadLocked()); |
173 |
> |
assertEquals(2 - i, lock.getReadLockCount()); |
174 |
> |
readUnlocker.accept(lock, s); |
175 |
> |
} |
176 |
> |
assertUnlocked(lock); |
177 |
> |
} |
178 |
|
} |
179 |
|
|
180 |
|
/** |
181 |
< |
* read-unlocking an unlocked lock throws IllegalMonitorStateException |
181 |
> |
* tryUnlockWrite fails if not write locked |
182 |
|
*/ |
183 |
< |
public void testReadUnlock_IMSE2() { |
183 |
> |
public void testTryUnlockWrite_failure() { |
184 |
|
StampedLock lock = new StampedLock(); |
185 |
< |
try { |
186 |
< |
lock.unlockRead(0L); |
187 |
< |
shouldThrow(); |
188 |
< |
} catch (IllegalMonitorStateException success) {} |
185 |
> |
assertFalse(lock.tryUnlockWrite()); |
186 |
> |
|
187 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) |
188 |
> |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
189 |
> |
long s = assertValid(lock, readLocker.apply(lock)); |
190 |
> |
assertFalse(lock.tryUnlockWrite()); |
191 |
> |
assertTrue(lock.isReadLocked()); |
192 |
> |
readUnlocker.accept(lock, s); |
193 |
> |
assertUnlocked(lock); |
194 |
> |
} |
195 |
|
} |
196 |
|
|
197 |
|
/** |
198 |
< |
* read-unlocking after writeLock throws IllegalMonitorStateException |
198 |
> |
* tryUnlockRead fails if not read locked |
199 |
|
*/ |
200 |
< |
public void testReadUnlock_IMSE3() { |
200 |
> |
public void testTryUnlockRead_failure() { |
201 |
|
StampedLock lock = new StampedLock(); |
202 |
< |
long s = lock.writeLock(); |
203 |
< |
try { |
204 |
< |
lock.unlockRead(s); |
205 |
< |
shouldThrow(); |
206 |
< |
} catch (IllegalMonitorStateException success) {} |
202 |
> |
assertFalse(lock.tryUnlockRead()); |
203 |
> |
|
204 |
> |
for (Function<StampedLock, Long> writeLocker : writeLockers()) |
205 |
> |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
206 |
> |
long s = writeLocker.apply(lock); |
207 |
> |
assertFalse(lock.tryUnlockRead()); |
208 |
> |
assertTrue(lock.isWriteLocked()); |
209 |
> |
writeUnlocker.accept(lock, s); |
210 |
> |
assertUnlocked(lock); |
211 |
> |
} |
212 |
|
} |
213 |
|
|
214 |
|
/** |
215 |
< |
* validate(0) fails |
215 |
> |
* validate(0L) fails |
216 |
|
*/ |
217 |
|
public void testValidate0() { |
218 |
|
StampedLock lock = new StampedLock(); |
220 |
|
} |
221 |
|
|
222 |
|
/** |
223 |
< |
* A stamp obtained from a successful lock operation validates |
223 |
> |
* A stamp obtained from a successful lock operation validates while the lock is held |
224 |
|
*/ |
225 |
|
public void testValidate() throws InterruptedException { |
226 |
|
StampedLock lock = new StampedLock(); |
227 |
< |
long s = lock.writeLock(); |
228 |
< |
assertTrue(lock.validate(s)); |
229 |
< |
lock.unlockWrite(s); |
230 |
< |
s = lock.readLock(); |
231 |
< |
assertTrue(lock.validate(s)); |
232 |
< |
lock.unlockRead(s); |
233 |
< |
assertTrue((s = lock.tryWriteLock()) != 0L); |
234 |
< |
assertTrue(lock.validate(s)); |
235 |
< |
lock.unlockWrite(s); |
236 |
< |
assertTrue((s = lock.tryReadLock()) != 0L); |
237 |
< |
assertTrue(lock.validate(s)); |
238 |
< |
lock.unlockRead(s); |
239 |
< |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
240 |
< |
assertTrue(lock.validate(s)); |
252 |
< |
lock.unlockWrite(s); |
253 |
< |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
254 |
< |
assertTrue(lock.validate(s)); |
255 |
< |
lock.unlockRead(s); |
256 |
< |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
227 |
> |
|
228 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) |
229 |
> |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
230 |
> |
long s = assertNonZero(readLocker.apply(lock)); |
231 |
> |
assertTrue(lock.validate(s)); |
232 |
> |
readUnlocker.accept(lock, s); |
233 |
> |
} |
234 |
> |
|
235 |
> |
for (Function<StampedLock, Long> writeLocker : writeLockers()) |
236 |
> |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
237 |
> |
long s = assertNonZero(writeLocker.apply(lock)); |
238 |
> |
assertTrue(lock.validate(s)); |
239 |
> |
writeUnlocker.accept(lock, s); |
240 |
> |
} |
241 |
|
} |
242 |
|
|
243 |
|
/** |
245 |
|
*/ |
246 |
|
public void testValidate2() throws InterruptedException { |
247 |
|
StampedLock lock = new StampedLock(); |
248 |
< |
long s; |
265 |
< |
assertTrue((s = lock.writeLock()) != 0L); |
248 |
> |
long s = assertNonZero(lock.writeLock()); |
249 |
|
assertTrue(lock.validate(s)); |
250 |
|
assertFalse(lock.validate(lock.tryWriteLock())); |
251 |
< |
assertFalse(lock.validate(lock.tryWriteLock(10L, MILLISECONDS))); |
251 |
> |
assertFalse(lock.validate(lock.tryWriteLock(0L, SECONDS))); |
252 |
|
assertFalse(lock.validate(lock.tryReadLock())); |
253 |
< |
assertFalse(lock.validate(lock.tryReadLock(10L, MILLISECONDS))); |
253 |
> |
assertFalse(lock.validate(lock.tryReadLock(0L, SECONDS))); |
254 |
|
assertFalse(lock.validate(lock.tryOptimisticRead())); |
255 |
|
lock.unlockWrite(s); |
256 |
|
} |
257 |
|
|
258 |
+ |
void assertThrowInterruptedExceptionWhenPreInterrupted(Action[] actions) { |
259 |
+ |
for (Action action : actions) { |
260 |
+ |
Thread.currentThread().interrupt(); |
261 |
+ |
try { |
262 |
+ |
action.run(); |
263 |
+ |
shouldThrow(); |
264 |
+ |
} |
265 |
+ |
catch (InterruptedException success) {} |
266 |
+ |
catch (Throwable fail) { threadUnexpectedException(fail); } |
267 |
+ |
assertFalse(Thread.interrupted()); |
268 |
+ |
} |
269 |
+ |
} |
270 |
+ |
|
271 |
|
/** |
272 |
< |
* writeLockInterruptibly is interruptible |
272 |
> |
* interruptible operations throw InterruptedException when pre-interrupted |
273 |
|
*/ |
274 |
< |
public void testWriteLockInterruptibly_Interruptible() |
279 |
< |
throws InterruptedException { |
280 |
< |
final CountDownLatch running = new CountDownLatch(1); |
274 |
> |
public void testInterruptibleOperationsThrowInterruptedExceptionWhenPreInterrupted() { |
275 |
|
final StampedLock lock = new StampedLock(); |
282 |
– |
long s = lock.writeLock(); |
283 |
– |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
284 |
– |
public void realRun() throws InterruptedException { |
285 |
– |
running.countDown(); |
286 |
– |
lock.writeLockInterruptibly(); |
287 |
– |
}}); |
276 |
|
|
277 |
< |
running.await(); |
278 |
< |
waitForThreadToEnterWaitState(t, 100); |
279 |
< |
t.interrupt(); |
280 |
< |
awaitTermination(t); |
281 |
< |
releaseWriteLock(lock, s); |
277 |
> |
Action[] interruptibleLockActions = { |
278 |
> |
() -> lock.writeLockInterruptibly(), |
279 |
> |
() -> lock.tryWriteLock(Long.MIN_VALUE, DAYS), |
280 |
> |
() -> lock.tryWriteLock(Long.MAX_VALUE, DAYS), |
281 |
> |
() -> lock.readLockInterruptibly(), |
282 |
> |
() -> lock.tryReadLock(Long.MIN_VALUE, DAYS), |
283 |
> |
() -> lock.tryReadLock(Long.MAX_VALUE, DAYS), |
284 |
> |
() -> lock.asWriteLock().lockInterruptibly(), |
285 |
> |
() -> lock.asWriteLock().tryLock(0L, DAYS), |
286 |
> |
() -> lock.asWriteLock().tryLock(Long.MAX_VALUE, DAYS), |
287 |
> |
() -> lock.asReadLock().lockInterruptibly(), |
288 |
> |
() -> lock.asReadLock().tryLock(0L, DAYS), |
289 |
> |
() -> lock.asReadLock().tryLock(Long.MAX_VALUE, DAYS), |
290 |
> |
}; |
291 |
> |
shuffle(interruptibleLockActions); |
292 |
> |
|
293 |
> |
assertThrowInterruptedExceptionWhenPreInterrupted(interruptibleLockActions); |
294 |
> |
{ |
295 |
> |
long s = lock.writeLock(); |
296 |
> |
assertThrowInterruptedExceptionWhenPreInterrupted(interruptibleLockActions); |
297 |
> |
lock.unlockWrite(s); |
298 |
> |
} |
299 |
> |
{ |
300 |
> |
long s = lock.readLock(); |
301 |
> |
assertThrowInterruptedExceptionWhenPreInterrupted(interruptibleLockActions); |
302 |
> |
lock.unlockRead(s); |
303 |
> |
} |
304 |
> |
} |
305 |
> |
|
306 |
> |
void assertThrowInterruptedExceptionWhenInterrupted(Action[] actions) { |
307 |
> |
int n = actions.length; |
308 |
> |
Future<?>[] futures = new Future<?>[n]; |
309 |
> |
CountDownLatch threadsStarted = new CountDownLatch(n); |
310 |
> |
CountDownLatch done = new CountDownLatch(n); |
311 |
> |
|
312 |
> |
for (int i = 0; i < n; i++) { |
313 |
> |
Action action = actions[i]; |
314 |
> |
futures[i] = cachedThreadPool.submit(new CheckedRunnable() { |
315 |
> |
public void realRun() throws Throwable { |
316 |
> |
threadsStarted.countDown(); |
317 |
> |
try { |
318 |
> |
action.run(); |
319 |
> |
shouldThrow(); |
320 |
> |
} |
321 |
> |
catch (InterruptedException success) {} |
322 |
> |
catch (Throwable fail) { threadUnexpectedException(fail); } |
323 |
> |
assertFalse(Thread.interrupted()); |
324 |
> |
done.countDown(); |
325 |
> |
}}); |
326 |
> |
} |
327 |
> |
|
328 |
> |
await(threadsStarted); |
329 |
> |
assertEquals(n, done.getCount()); |
330 |
> |
for (Future<?> future : futures) // Interrupt all the tasks |
331 |
> |
future.cancel(true); |
332 |
> |
await(done); |
333 |
|
} |
334 |
|
|
335 |
|
/** |
336 |
< |
* timed tryWriteLock is interruptible |
336 |
> |
* interruptible operations throw InterruptedException when write locked and interrupted |
337 |
|
*/ |
338 |
< |
public void testWriteTryLock_Interruptible() throws InterruptedException { |
300 |
< |
final CountDownLatch running = new CountDownLatch(1); |
338 |
> |
public void testInterruptibleOperationsThrowInterruptedExceptionWriteLockedInterrupted() { |
339 |
|
final StampedLock lock = new StampedLock(); |
340 |
|
long s = lock.writeLock(); |
303 |
– |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
304 |
– |
public void realRun() throws InterruptedException { |
305 |
– |
running.countDown(); |
306 |
– |
lock.tryWriteLock(2 * LONG_DELAY_MS, MILLISECONDS); |
307 |
– |
}}); |
341 |
|
|
342 |
< |
running.await(); |
343 |
< |
waitForThreadToEnterWaitState(t, 100); |
344 |
< |
t.interrupt(); |
345 |
< |
awaitTermination(t); |
346 |
< |
releaseWriteLock(lock, s); |
342 |
> |
Action[] interruptibleLockBlockingActions = { |
343 |
> |
() -> lock.writeLockInterruptibly(), |
344 |
> |
() -> lock.tryWriteLock(Long.MAX_VALUE, DAYS), |
345 |
> |
() -> lock.readLockInterruptibly(), |
346 |
> |
() -> lock.tryReadLock(Long.MAX_VALUE, DAYS), |
347 |
> |
() -> lock.asWriteLock().lockInterruptibly(), |
348 |
> |
() -> lock.asWriteLock().tryLock(Long.MAX_VALUE, DAYS), |
349 |
> |
() -> lock.asReadLock().lockInterruptibly(), |
350 |
> |
() -> lock.asReadLock().tryLock(Long.MAX_VALUE, DAYS), |
351 |
> |
}; |
352 |
> |
shuffle(interruptibleLockBlockingActions); |
353 |
> |
|
354 |
> |
assertThrowInterruptedExceptionWhenInterrupted(interruptibleLockBlockingActions); |
355 |
|
} |
356 |
|
|
357 |
|
/** |
358 |
< |
* readLockInterruptibly is interruptible |
358 |
> |
* interruptible operations throw InterruptedException when read locked and interrupted |
359 |
|
*/ |
360 |
< |
public void testReadLockInterruptibly_Interruptible() |
320 |
< |
throws InterruptedException { |
321 |
< |
final CountDownLatch running = new CountDownLatch(1); |
360 |
> |
public void testInterruptibleOperationsThrowInterruptedExceptionReadLockedInterrupted() { |
361 |
|
final StampedLock lock = new StampedLock(); |
362 |
< |
long s = lock.writeLock(); |
324 |
< |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
325 |
< |
public void realRun() throws InterruptedException { |
326 |
< |
running.countDown(); |
327 |
< |
lock.readLockInterruptibly(); |
328 |
< |
}}); |
362 |
> |
long s = lock.readLock(); |
363 |
|
|
364 |
< |
running.await(); |
365 |
< |
waitForThreadToEnterWaitState(t, 100); |
366 |
< |
t.interrupt(); |
367 |
< |
awaitTermination(t); |
368 |
< |
releaseWriteLock(lock, s); |
364 |
> |
Action[] interruptibleLockBlockingActions = { |
365 |
> |
() -> lock.writeLockInterruptibly(), |
366 |
> |
() -> lock.tryWriteLock(Long.MAX_VALUE, DAYS), |
367 |
> |
() -> lock.asWriteLock().lockInterruptibly(), |
368 |
> |
() -> lock.asWriteLock().tryLock(Long.MAX_VALUE, DAYS), |
369 |
> |
}; |
370 |
> |
shuffle(interruptibleLockBlockingActions); |
371 |
> |
|
372 |
> |
assertThrowInterruptedExceptionWhenInterrupted(interruptibleLockBlockingActions); |
373 |
|
} |
374 |
|
|
375 |
|
/** |
376 |
< |
* timed tryReadLock is interruptible |
376 |
> |
* Non-interruptible operations ignore and preserve interrupt status |
377 |
|
*/ |
378 |
< |
public void testReadTryLock_Interruptible() throws InterruptedException { |
341 |
< |
final CountDownLatch running = new CountDownLatch(1); |
378 |
> |
public void testNonInterruptibleOperationsIgnoreInterrupts() { |
379 |
|
final StampedLock lock = new StampedLock(); |
380 |
< |
long s = lock.writeLock(); |
344 |
< |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
345 |
< |
public void realRun() throws InterruptedException { |
346 |
< |
running.countDown(); |
347 |
< |
lock.tryReadLock(2 * LONG_DELAY_MS, MILLISECONDS); |
348 |
< |
}}); |
380 |
> |
Thread.currentThread().interrupt(); |
381 |
|
|
382 |
< |
running.await(); |
383 |
< |
waitForThreadToEnterWaitState(t, 100); |
384 |
< |
t.interrupt(); |
385 |
< |
awaitTermination(t); |
386 |
< |
releaseWriteLock(lock, s); |
382 |
> |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
383 |
> |
long s = assertValid(lock, lock.readLock()); |
384 |
> |
readUnlocker.accept(lock, s); |
385 |
> |
s = assertValid(lock, lock.tryReadLock()); |
386 |
> |
readUnlocker.accept(lock, s); |
387 |
> |
} |
388 |
> |
|
389 |
> |
lock.asReadLock().lock(); |
390 |
> |
lock.asReadLock().unlock(); |
391 |
> |
|
392 |
> |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
393 |
> |
long s = assertValid(lock, lock.writeLock()); |
394 |
> |
writeUnlocker.accept(lock, s); |
395 |
> |
s = assertValid(lock, lock.tryWriteLock()); |
396 |
> |
writeUnlocker.accept(lock, s); |
397 |
> |
} |
398 |
> |
|
399 |
> |
lock.asWriteLock().lock(); |
400 |
> |
lock.asWriteLock().unlock(); |
401 |
> |
|
402 |
> |
assertTrue(Thread.interrupted()); |
403 |
|
} |
404 |
|
|
405 |
|
/** |
406 |
|
* tryWriteLock on an unlocked lock succeeds |
407 |
|
*/ |
408 |
< |
public void testWriteTryLock() { |
408 |
> |
public void testTryWriteLock() { |
409 |
|
final StampedLock lock = new StampedLock(); |
410 |
|
long s = lock.tryWriteLock(); |
411 |
|
assertTrue(s != 0L); |
412 |
|
assertTrue(lock.isWriteLocked()); |
413 |
< |
long s2 = lock.tryWriteLock(); |
366 |
< |
assertEquals(s2, 0L); |
413 |
> |
assertEquals(0L, lock.tryWriteLock()); |
414 |
|
releaseWriteLock(lock, s); |
415 |
|
} |
416 |
|
|
417 |
|
/** |
418 |
|
* tryWriteLock fails if locked |
419 |
|
*/ |
420 |
< |
public void testWriteTryLockWhenLocked() { |
420 |
> |
public void testTryWriteLockWhenLocked() { |
421 |
|
final StampedLock lock = new StampedLock(); |
422 |
|
long s = lock.writeLock(); |
423 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
424 |
|
public void realRun() { |
425 |
< |
long ws = lock.tryWriteLock(); |
379 |
< |
assertTrue(ws == 0L); |
425 |
> |
assertEquals(0L, lock.tryWriteLock()); |
426 |
|
}}); |
427 |
|
|
428 |
+ |
assertEquals(0L, lock.tryWriteLock()); |
429 |
|
awaitTermination(t); |
430 |
|
releaseWriteLock(lock, s); |
431 |
|
} |
433 |
|
/** |
434 |
|
* tryReadLock fails if write-locked |
435 |
|
*/ |
436 |
< |
public void testReadTryLockWhenLocked() { |
436 |
> |
public void testTryReadLockWhenLocked() { |
437 |
|
final StampedLock lock = new StampedLock(); |
438 |
|
long s = lock.writeLock(); |
439 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
440 |
|
public void realRun() { |
441 |
< |
long rs = lock.tryReadLock(); |
395 |
< |
assertEquals(rs, 0L); |
441 |
> |
assertEquals(0L, lock.tryReadLock()); |
442 |
|
}}); |
443 |
|
|
444 |
+ |
assertEquals(0L, lock.tryReadLock()); |
445 |
|
awaitTermination(t); |
446 |
|
releaseWriteLock(lock, s); |
447 |
|
} |
455 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
456 |
|
public void realRun() throws InterruptedException { |
457 |
|
long s2 = lock.tryReadLock(); |
458 |
< |
assertTrue(s2 != 0L); |
458 |
> |
assertValid(lock, s2); |
459 |
|
lock.unlockRead(s2); |
460 |
|
long s3 = lock.tryReadLock(LONG_DELAY_MS, MILLISECONDS); |
461 |
< |
assertTrue(s3 != 0L); |
461 |
> |
assertValid(lock, s3); |
462 |
|
lock.unlockRead(s3); |
463 |
|
long s4 = lock.readLock(); |
464 |
+ |
assertValid(lock, s4); |
465 |
|
lock.unlockRead(s4); |
466 |
+ |
lock.asReadLock().lock(); |
467 |
+ |
lock.asReadLock().unlock(); |
468 |
+ |
lock.asReadLock().lockInterruptibly(); |
469 |
+ |
lock.asReadLock().unlock(); |
470 |
+ |
lock.asReadLock().tryLock(Long.MIN_VALUE, DAYS); |
471 |
+ |
lock.asReadLock().unlock(); |
472 |
|
}}); |
473 |
|
|
474 |
|
awaitTermination(t); |
479 |
|
* A writelock succeeds only after a reading thread unlocks |
480 |
|
*/ |
481 |
|
public void testWriteAfterReadLock() throws InterruptedException { |
482 |
< |
final CountDownLatch running = new CountDownLatch(1); |
482 |
> |
final CountDownLatch threadStarted = new CountDownLatch(1); |
483 |
|
final StampedLock lock = new StampedLock(); |
484 |
|
long rs = lock.readLock(); |
485 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
486 |
|
public void realRun() { |
487 |
< |
running.countDown(); |
487 |
> |
threadStarted.countDown(); |
488 |
|
long s = lock.writeLock(); |
489 |
|
lock.unlockWrite(s); |
490 |
|
}}); |
491 |
|
|
492 |
< |
running.await(); |
493 |
< |
waitForThreadToEnterWaitState(t, 100); |
492 |
> |
threadStarted.await(); |
493 |
> |
waitForThreadToEnterWaitState(t, MEDIUM_DELAY_MS); |
494 |
|
assertFalse(lock.isWriteLocked()); |
495 |
|
lock.unlockRead(rs); |
496 |
|
awaitTermination(t); |
517 |
|
lock.unlockWrite(ws); |
518 |
|
}}); |
519 |
|
|
520 |
+ |
assertTrue(lock.isReadLocked()); |
521 |
|
assertFalse(lock.isWriteLocked()); |
522 |
|
lock.unlockRead(s); |
523 |
|
awaitTermination(t2); |
529 |
|
*/ |
530 |
|
public void testReadAfterWriteLock() { |
531 |
|
final StampedLock lock = new StampedLock(); |
532 |
+ |
final CountDownLatch threadsStarted = new CountDownLatch(2); |
533 |
|
final long s = lock.writeLock(); |
534 |
|
Thread t1 = newStartedThread(new CheckedRunnable() { |
535 |
|
public void realRun() { |
536 |
+ |
threadsStarted.countDown(); |
537 |
|
long rs = lock.readLock(); |
538 |
|
lock.unlockRead(rs); |
539 |
|
}}); |
540 |
|
Thread t2 = newStartedThread(new CheckedRunnable() { |
541 |
|
public void realRun() { |
542 |
+ |
threadsStarted.countDown(); |
543 |
|
long rs = lock.readLock(); |
544 |
|
lock.unlockRead(rs); |
545 |
|
}}); |
546 |
|
|
547 |
+ |
await(threadsStarted); |
548 |
+ |
waitForThreadToEnterWaitState(t1, MEDIUM_DELAY_MS); |
549 |
+ |
waitForThreadToEnterWaitState(t2, MEDIUM_DELAY_MS); |
550 |
|
releaseWriteLock(lock, s); |
551 |
|
awaitTermination(t1); |
552 |
|
awaitTermination(t2); |
553 |
|
} |
554 |
|
|
555 |
|
/** |
556 |
< |
* tryReadLock succeeds if readlocked but not writelocked |
556 |
> |
* tryReadLock succeeds if read locked but not write locked |
557 |
|
*/ |
558 |
|
public void testTryLockWhenReadLocked() { |
559 |
|
final StampedLock lock = new StampedLock(); |
561 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
562 |
|
public void realRun() { |
563 |
|
long rs = lock.tryReadLock(); |
564 |
< |
threadAssertTrue(rs != 0L); |
564 |
> |
assertValid(lock, rs); |
565 |
|
lock.unlockRead(rs); |
566 |
|
}}); |
567 |
|
|
570 |
|
} |
571 |
|
|
572 |
|
/** |
573 |
< |
* tryWriteLock fails when readlocked |
573 |
> |
* tryWriteLock fails when read locked |
574 |
|
*/ |
575 |
< |
public void testWriteTryLockWhenReadLocked() { |
575 |
> |
public void testTryWriteLockWhenReadLocked() { |
576 |
|
final StampedLock lock = new StampedLock(); |
577 |
|
long s = lock.readLock(); |
578 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
579 |
|
public void realRun() { |
580 |
< |
long ws = lock.tryWriteLock(); |
520 |
< |
threadAssertEquals(ws, 0L); |
580 |
> |
threadAssertEquals(0L, lock.tryWriteLock()); |
581 |
|
}}); |
582 |
|
|
583 |
|
awaitTermination(t); |
585 |
|
} |
586 |
|
|
587 |
|
/** |
588 |
< |
* timed tryWriteLock times out if locked |
588 |
> |
* timed lock operations time out if lock not available |
589 |
|
*/ |
590 |
< |
public void testWriteTryLock_Timeout() { |
590 |
> |
public void testTimedLock_Timeout() throws Exception { |
591 |
> |
ArrayList<Future<?>> futures = new ArrayList<>(); |
592 |
> |
|
593 |
> |
// Write locked |
594 |
|
final StampedLock lock = new StampedLock(); |
595 |
< |
long s = lock.writeLock(); |
596 |
< |
Thread t = newStartedThread(new CheckedRunnable() { |
595 |
> |
long stamp = lock.writeLock(); |
596 |
> |
assertEquals(0L, lock.tryReadLock(0L, DAYS)); |
597 |
> |
assertEquals(0L, lock.tryReadLock(Long.MIN_VALUE, DAYS)); |
598 |
> |
assertFalse(lock.asReadLock().tryLock(0L, DAYS)); |
599 |
> |
assertFalse(lock.asReadLock().tryLock(Long.MIN_VALUE, DAYS)); |
600 |
> |
assertEquals(0L, lock.tryWriteLock(0L, DAYS)); |
601 |
> |
assertEquals(0L, lock.tryWriteLock(Long.MIN_VALUE, DAYS)); |
602 |
> |
assertFalse(lock.asWriteLock().tryLock(0L, DAYS)); |
603 |
> |
assertFalse(lock.asWriteLock().tryLock(Long.MIN_VALUE, DAYS)); |
604 |
> |
|
605 |
> |
futures.add(cachedThreadPool.submit(new CheckedRunnable() { |
606 |
|
public void realRun() throws InterruptedException { |
607 |
|
long startTime = System.nanoTime(); |
608 |
< |
long timeoutMillis = 10; |
609 |
< |
long ws = lock.tryWriteLock(timeoutMillis, MILLISECONDS); |
610 |
< |
assertEquals(ws, 0L); |
539 |
< |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
540 |
< |
}}); |
608 |
> |
assertEquals(0L, lock.tryWriteLock(timeoutMillis(), MILLISECONDS)); |
609 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
610 |
> |
}})); |
611 |
|
|
612 |
< |
awaitTermination(t); |
613 |
< |
releaseWriteLock(lock, s); |
614 |
< |
} |
612 |
> |
futures.add(cachedThreadPool.submit(new CheckedRunnable() { |
613 |
> |
public void realRun() throws InterruptedException { |
614 |
> |
long startTime = System.nanoTime(); |
615 |
> |
assertEquals(0L, lock.tryReadLock(timeoutMillis(), MILLISECONDS)); |
616 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
617 |
> |
}})); |
618 |
> |
|
619 |
> |
// Read locked |
620 |
> |
final StampedLock lock2 = new StampedLock(); |
621 |
> |
long stamp2 = lock2.readLock(); |
622 |
> |
assertEquals(0L, lock2.tryWriteLock(0L, DAYS)); |
623 |
> |
assertEquals(0L, lock2.tryWriteLock(Long.MIN_VALUE, DAYS)); |
624 |
> |
assertFalse(lock2.asWriteLock().tryLock(0L, DAYS)); |
625 |
> |
assertFalse(lock2.asWriteLock().tryLock(Long.MIN_VALUE, DAYS)); |
626 |
|
|
627 |
< |
/** |
547 |
< |
* timed tryReadLock times out if write-locked |
548 |
< |
*/ |
549 |
< |
public void testReadTryLock_Timeout() { |
550 |
< |
final StampedLock lock = new StampedLock(); |
551 |
< |
long s = lock.writeLock(); |
552 |
< |
Thread t = newStartedThread(new CheckedRunnable() { |
627 |
> |
futures.add(cachedThreadPool.submit(new CheckedRunnable() { |
628 |
|
public void realRun() throws InterruptedException { |
629 |
|
long startTime = System.nanoTime(); |
630 |
< |
long timeoutMillis = 10; |
631 |
< |
long rs = lock.tryReadLock(timeoutMillis, MILLISECONDS); |
632 |
< |
assertEquals(rs, 0L); |
558 |
< |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
559 |
< |
}}); |
630 |
> |
assertEquals(0L, lock2.tryWriteLock(timeoutMillis(), MILLISECONDS)); |
631 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
632 |
> |
}})); |
633 |
|
|
634 |
< |
awaitTermination(t); |
635 |
< |
assertTrue(lock.isWriteLocked()); |
636 |
< |
lock.unlockWrite(s); |
634 |
> |
for (Future<?> future : futures) |
635 |
> |
assertNull(future.get()); |
636 |
> |
|
637 |
> |
releaseWriteLock(lock, stamp); |
638 |
> |
releaseReadLock(lock2, stamp2); |
639 |
|
} |
640 |
|
|
641 |
|
/** |
642 |
< |
* writeLockInterruptibly succeeds if unlocked, else is interruptible |
642 |
> |
* writeLockInterruptibly succeeds if unlocked |
643 |
|
*/ |
644 |
|
public void testWriteLockInterruptibly() throws InterruptedException { |
570 |
– |
final CountDownLatch running = new CountDownLatch(1); |
645 |
|
final StampedLock lock = new StampedLock(); |
646 |
|
long s = lock.writeLockInterruptibly(); |
573 |
– |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
574 |
– |
public void realRun() throws InterruptedException { |
575 |
– |
running.countDown(); |
576 |
– |
lock.writeLockInterruptibly(); |
577 |
– |
}}); |
578 |
– |
|
579 |
– |
running.await(); |
580 |
– |
waitForThreadToEnterWaitState(t, 100); |
581 |
– |
t.interrupt(); |
647 |
|
assertTrue(lock.isWriteLocked()); |
583 |
– |
awaitTermination(t); |
648 |
|
releaseWriteLock(lock, s); |
649 |
|
} |
650 |
|
|
651 |
|
/** |
652 |
< |
* readLockInterruptibly succeeds if lock free else is interruptible |
652 |
> |
* readLockInterruptibly succeeds if lock free |
653 |
|
*/ |
654 |
|
public void testReadLockInterruptibly() throws InterruptedException { |
591 |
– |
final CountDownLatch running = new CountDownLatch(1); |
655 |
|
final StampedLock lock = new StampedLock(); |
656 |
< |
long s; |
657 |
< |
s = lock.readLockInterruptibly(); |
656 |
> |
|
657 |
> |
long s = assertValid(lock, lock.readLockInterruptibly()); |
658 |
> |
assertTrue(lock.isReadLocked()); |
659 |
|
lock.unlockRead(s); |
596 |
– |
s = lock.writeLockInterruptibly(); |
597 |
– |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
598 |
– |
public void realRun() throws InterruptedException { |
599 |
– |
running.countDown(); |
600 |
– |
lock.readLockInterruptibly(); |
601 |
– |
}}); |
660 |
|
|
661 |
< |
running.await(); |
662 |
< |
waitForThreadToEnterWaitState(t, 100); |
663 |
< |
t.interrupt(); |
606 |
< |
awaitTermination(t); |
607 |
< |
releaseWriteLock(lock, s); |
661 |
> |
lock.asReadLock().lockInterruptibly(); |
662 |
> |
assertTrue(lock.isReadLocked()); |
663 |
> |
lock.asReadLock().unlock(); |
664 |
|
} |
665 |
|
|
666 |
|
/** |
692 |
|
} |
693 |
|
|
694 |
|
/** |
695 |
< |
* tryOptimisticRead succeeds and validates if unlocked, fails if locked |
695 |
> |
* tryOptimisticRead succeeds and validates if unlocked, fails if |
696 |
> |
* exclusively locked |
697 |
|
*/ |
698 |
|
public void testValidateOptimistic() throws InterruptedException { |
699 |
|
StampedLock lock = new StampedLock(); |
700 |
< |
long s, p; |
701 |
< |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
702 |
< |
assertTrue(lock.validate(p)); |
703 |
< |
assertTrue((s = lock.writeLock()) != 0L); |
704 |
< |
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
705 |
< |
assertTrue(lock.validate(s)); |
706 |
< |
lock.unlockWrite(s); |
707 |
< |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
708 |
< |
assertTrue(lock.validate(p)); |
709 |
< |
assertTrue((s = lock.readLock()) != 0L); |
710 |
< |
assertTrue(lock.validate(s)); |
711 |
< |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
712 |
< |
assertTrue(lock.validate(p)); |
713 |
< |
lock.unlockRead(s); |
714 |
< |
assertTrue((s = lock.tryWriteLock()) != 0L); |
715 |
< |
assertTrue(lock.validate(s)); |
716 |
< |
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
660 |
< |
lock.unlockWrite(s); |
661 |
< |
assertTrue((s = lock.tryReadLock()) != 0L); |
662 |
< |
assertTrue(lock.validate(s)); |
663 |
< |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
664 |
< |
lock.unlockRead(s); |
665 |
< |
assertTrue(lock.validate(p)); |
666 |
< |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
667 |
< |
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
668 |
< |
assertTrue(lock.validate(s)); |
669 |
< |
lock.unlockWrite(s); |
670 |
< |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
671 |
< |
assertTrue(lock.validate(s)); |
672 |
< |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
673 |
< |
lock.unlockRead(s); |
674 |
< |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
700 |
> |
|
701 |
> |
assertValid(lock, lock.tryOptimisticRead()); |
702 |
> |
|
703 |
> |
for (Function<StampedLock, Long> writeLocker : writeLockers()) { |
704 |
> |
long s = assertValid(lock, writeLocker.apply(lock)); |
705 |
> |
assertEquals(0L, lock.tryOptimisticRead()); |
706 |
> |
releaseWriteLock(lock, s); |
707 |
> |
} |
708 |
> |
|
709 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) { |
710 |
> |
long s = assertValid(lock, readLocker.apply(lock)); |
711 |
> |
long p = assertValid(lock, lock.tryOptimisticRead()); |
712 |
> |
releaseReadLock(lock, s); |
713 |
> |
assertTrue(lock.validate(p)); |
714 |
> |
} |
715 |
> |
|
716 |
> |
assertValid(lock, lock.tryOptimisticRead()); |
717 |
|
} |
718 |
|
|
719 |
|
/** |
720 |
|
* tryOptimisticRead stamp does not validate if a write lock intervenes |
721 |
|
*/ |
722 |
|
public void testValidateOptimisticWriteLocked() { |
723 |
< |
StampedLock lock = new StampedLock(); |
724 |
< |
long s, p; |
725 |
< |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
684 |
< |
assertTrue((s = lock.writeLock()) != 0L); |
723 |
> |
final StampedLock lock = new StampedLock(); |
724 |
> |
final long p = assertValid(lock, lock.tryOptimisticRead()); |
725 |
> |
final long s = assertValid(lock, lock.writeLock()); |
726 |
|
assertFalse(lock.validate(p)); |
727 |
< |
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
727 |
> |
assertEquals(0L, lock.tryOptimisticRead()); |
728 |
|
assertTrue(lock.validate(s)); |
729 |
|
lock.unlockWrite(s); |
730 |
|
} |
737 |
|
throws InterruptedException { |
738 |
|
final CountDownLatch running = new CountDownLatch(1); |
739 |
|
final StampedLock lock = new StampedLock(); |
740 |
< |
long s, p; |
741 |
< |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
740 |
> |
final long p = assertValid(lock, lock.tryOptimisticRead()); |
741 |
> |
|
742 |
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
743 |
|
public void realRun() throws InterruptedException { |
744 |
|
lock.writeLockInterruptibly(); |
748 |
|
|
749 |
|
running.await(); |
750 |
|
assertFalse(lock.validate(p)); |
751 |
< |
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
751 |
> |
assertEquals(0L, lock.tryOptimisticRead()); |
752 |
|
t.interrupt(); |
753 |
|
awaitTermination(t); |
754 |
|
} |
755 |
|
|
756 |
|
/** |
757 |
< |
* tryConvertToOptimisticRead succeeds and validates if successfully locked, |
757 |
> |
* tryConvertToOptimisticRead succeeds and validates if successfully locked |
758 |
|
*/ |
759 |
|
public void testTryConvertToOptimisticRead() throws InterruptedException { |
760 |
|
StampedLock lock = new StampedLock(); |
761 |
< |
long s, p; |
761 |
> |
long s, p, q; |
762 |
|
assertEquals(0L, lock.tryConvertToOptimisticRead(0L)); |
763 |
|
|
764 |
< |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
764 |
> |
s = assertValid(lock, lock.tryOptimisticRead()); |
765 |
|
assertEquals(s, lock.tryConvertToOptimisticRead(s)); |
766 |
|
assertTrue(lock.validate(s)); |
767 |
|
|
768 |
< |
assertTrue((p = lock.readLock()) != 0L); |
769 |
< |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
770 |
< |
assertEquals(s, lock.tryConvertToOptimisticRead(s)); |
771 |
< |
assertTrue(lock.validate(s)); |
772 |
< |
lock.unlockRead(p); |
773 |
< |
|
774 |
< |
assertTrue((s = lock.writeLock()) != 0L); |
734 |
< |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
735 |
< |
assertTrue(lock.validate(p)); |
736 |
< |
|
737 |
< |
assertTrue((s = lock.readLock()) != 0L); |
738 |
< |
assertTrue(lock.validate(s)); |
739 |
< |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
740 |
< |
assertTrue(lock.validate(p)); |
741 |
< |
|
742 |
< |
assertTrue((s = lock.tryWriteLock()) != 0L); |
743 |
< |
assertTrue(lock.validate(s)); |
744 |
< |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
745 |
< |
assertTrue(lock.validate(p)); |
746 |
< |
|
747 |
< |
assertTrue((s = lock.tryReadLock()) != 0L); |
748 |
< |
assertTrue(lock.validate(s)); |
749 |
< |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
750 |
< |
assertTrue(lock.validate(p)); |
751 |
< |
|
752 |
< |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
753 |
< |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
754 |
< |
assertTrue(lock.validate(p)); |
768 |
> |
for (Function<StampedLock, Long> writeLocker : writeLockers()) { |
769 |
> |
s = assertValid(lock, writeLocker.apply(lock)); |
770 |
> |
p = assertValid(lock, lock.tryConvertToOptimisticRead(s)); |
771 |
> |
assertFalse(lock.validate(s)); |
772 |
> |
assertTrue(lock.validate(p)); |
773 |
> |
assertUnlocked(lock); |
774 |
> |
} |
775 |
|
|
776 |
< |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
777 |
< |
assertTrue(lock.validate(s)); |
778 |
< |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
779 |
< |
assertTrue(lock.validate(p)); |
776 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) { |
777 |
> |
s = assertValid(lock, readLocker.apply(lock)); |
778 |
> |
q = assertValid(lock, lock.tryOptimisticRead()); |
779 |
> |
assertEquals(q, lock.tryConvertToOptimisticRead(q)); |
780 |
> |
assertTrue(lock.validate(q)); |
781 |
> |
assertTrue(lock.isReadLocked()); |
782 |
> |
p = assertValid(lock, lock.tryConvertToOptimisticRead(s)); |
783 |
> |
assertTrue(lock.validate(p)); |
784 |
> |
assertTrue(lock.validate(s)); |
785 |
> |
assertUnlocked(lock); |
786 |
> |
assertEquals(q, lock.tryConvertToOptimisticRead(q)); |
787 |
> |
assertTrue(lock.validate(q)); |
788 |
> |
} |
789 |
|
} |
790 |
|
|
791 |
|
/** |
792 |
< |
* tryConvertToReadLock succeeds and validates if successfully locked |
764 |
< |
* or lock free; |
792 |
> |
* tryConvertToReadLock succeeds for valid stamps |
793 |
|
*/ |
794 |
|
public void testTryConvertToReadLock() throws InterruptedException { |
795 |
|
StampedLock lock = new StampedLock(); |
796 |
|
long s, p; |
797 |
|
|
798 |
< |
assertFalse((p = lock.tryConvertToReadLock(0L)) != 0L); |
798 |
> |
assertEquals(0L, lock.tryConvertToReadLock(0L)); |
799 |
|
|
800 |
< |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
801 |
< |
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
800 |
> |
s = assertValid(lock, lock.tryOptimisticRead()); |
801 |
> |
p = assertValid(lock, lock.tryConvertToReadLock(s)); |
802 |
|
assertTrue(lock.isReadLocked()); |
803 |
|
assertEquals(1, lock.getReadLockCount()); |
804 |
+ |
assertTrue(lock.validate(s)); |
805 |
|
lock.unlockRead(p); |
806 |
|
|
807 |
< |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
807 |
> |
s = assertValid(lock, lock.tryOptimisticRead()); |
808 |
|
lock.readLock(); |
809 |
< |
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
809 |
> |
p = assertValid(lock, lock.tryConvertToReadLock(s)); |
810 |
|
assertTrue(lock.isReadLocked()); |
811 |
|
assertEquals(2, lock.getReadLockCount()); |
812 |
|
lock.unlockRead(p); |
813 |
|
lock.unlockRead(p); |
814 |
+ |
assertUnlocked(lock); |
815 |
|
|
816 |
< |
assertTrue((s = lock.writeLock()) != 0L); |
817 |
< |
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
818 |
< |
assertTrue(lock.validate(p)); |
819 |
< |
assertTrue(lock.isReadLocked()); |
820 |
< |
assertEquals(1, lock.getReadLockCount()); |
821 |
< |
lock.unlockRead(p); |
822 |
< |
|
823 |
< |
assertTrue((s = lock.readLock()) != 0L); |
824 |
< |
assertTrue(lock.validate(s)); |
825 |
< |
assertEquals(s, lock.tryConvertToReadLock(s)); |
826 |
< |
assertTrue(lock.validate(s)); |
827 |
< |
assertTrue(lock.isReadLocked()); |
828 |
< |
assertEquals(1, lock.getReadLockCount()); |
829 |
< |
lock.unlockRead(s); |
830 |
< |
|
831 |
< |
assertTrue((s = lock.tryWriteLock()) != 0L); |
832 |
< |
assertTrue(lock.validate(s)); |
833 |
< |
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
834 |
< |
assertTrue(lock.validate(p)); |
805 |
< |
assertEquals(1, lock.getReadLockCount()); |
806 |
< |
lock.unlockRead(p); |
807 |
< |
|
808 |
< |
assertTrue((s = lock.tryReadLock()) != 0L); |
809 |
< |
assertTrue(lock.validate(s)); |
810 |
< |
assertEquals(s, lock.tryConvertToReadLock(s)); |
811 |
< |
assertTrue(lock.validate(s)); |
812 |
< |
assertTrue(lock.isReadLocked()); |
813 |
< |
assertEquals(1, lock.getReadLockCount()); |
814 |
< |
lock.unlockRead(s); |
815 |
< |
|
816 |
< |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
817 |
< |
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
818 |
< |
assertTrue(lock.validate(p)); |
819 |
< |
assertTrue(lock.isReadLocked()); |
820 |
< |
assertEquals(1, lock.getReadLockCount()); |
821 |
< |
lock.unlockRead(p); |
822 |
< |
|
823 |
< |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
824 |
< |
assertTrue(lock.validate(s)); |
825 |
< |
assertEquals(s, lock.tryConvertToReadLock(s)); |
826 |
< |
assertTrue(lock.validate(s)); |
827 |
< |
assertTrue(lock.isReadLocked()); |
828 |
< |
assertEquals(1, lock.getReadLockCount()); |
829 |
< |
lock.unlockRead(s); |
816 |
> |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
817 |
> |
for (Function<StampedLock, Long> writeLocker : writeLockers()) { |
818 |
> |
s = assertValid(lock, writeLocker.apply(lock)); |
819 |
> |
p = assertValid(lock, lock.tryConvertToReadLock(s)); |
820 |
> |
assertFalse(lock.validate(s)); |
821 |
> |
assertTrue(lock.isReadLocked()); |
822 |
> |
assertEquals(1, lock.getReadLockCount()); |
823 |
> |
readUnlocker.accept(lock, p); |
824 |
> |
} |
825 |
> |
|
826 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) { |
827 |
> |
s = assertValid(lock, readLocker.apply(lock)); |
828 |
> |
assertEquals(s, lock.tryConvertToReadLock(s)); |
829 |
> |
assertTrue(lock.validate(s)); |
830 |
> |
assertTrue(lock.isReadLocked()); |
831 |
> |
assertEquals(1, lock.getReadLockCount()); |
832 |
> |
readUnlocker.accept(lock, s); |
833 |
> |
} |
834 |
> |
} |
835 |
|
} |
836 |
|
|
837 |
|
/** |
838 |
< |
* tryConvertToWriteLock succeeds and validates if successfully locked |
834 |
< |
* or lock free; |
838 |
> |
* tryConvertToWriteLock succeeds if lock available; fails if multiply read locked |
839 |
|
*/ |
840 |
|
public void testTryConvertToWriteLock() throws InterruptedException { |
841 |
|
StampedLock lock = new StampedLock(); |
842 |
|
long s, p; |
843 |
|
|
844 |
< |
assertFalse((p = lock.tryConvertToWriteLock(0L)) != 0L); |
844 |
> |
assertEquals(0L, lock.tryConvertToWriteLock(0L)); |
845 |
|
|
846 |
|
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
847 |
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
848 |
|
assertTrue(lock.isWriteLocked()); |
849 |
|
lock.unlockWrite(p); |
850 |
|
|
851 |
< |
assertTrue((s = lock.writeLock()) != 0L); |
852 |
< |
assertEquals(s, lock.tryConvertToWriteLock(s)); |
853 |
< |
assertTrue(lock.validate(s)); |
854 |
< |
assertTrue(lock.isWriteLocked()); |
855 |
< |
lock.unlockWrite(s); |
856 |
< |
|
857 |
< |
assertTrue((s = lock.readLock()) != 0L); |
858 |
< |
assertTrue(lock.validate(s)); |
859 |
< |
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
860 |
< |
assertTrue(lock.validate(p)); |
861 |
< |
assertTrue(lock.isWriteLocked()); |
862 |
< |
lock.unlockWrite(p); |
863 |
< |
|
864 |
< |
assertTrue((s = lock.tryWriteLock()) != 0L); |
865 |
< |
assertTrue(lock.validate(s)); |
866 |
< |
assertEquals(s, lock.tryConvertToWriteLock(s)); |
867 |
< |
assertTrue(lock.validate(s)); |
868 |
< |
assertTrue(lock.isWriteLocked()); |
865 |
< |
lock.unlockWrite(s); |
866 |
< |
|
867 |
< |
assertTrue((s = lock.tryReadLock()) != 0L); |
868 |
< |
assertTrue(lock.validate(s)); |
869 |
< |
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
870 |
< |
assertTrue(lock.validate(p)); |
871 |
< |
assertTrue(lock.isWriteLocked()); |
872 |
< |
lock.unlockWrite(p); |
873 |
< |
|
874 |
< |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
875 |
< |
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
876 |
< |
assertTrue(lock.validate(p)); |
877 |
< |
assertTrue(lock.isWriteLocked()); |
878 |
< |
lock.unlockWrite(p); |
851 |
> |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
852 |
> |
for (Function<StampedLock, Long> writeLocker : writeLockers()) { |
853 |
> |
s = assertValid(lock, writeLocker.apply(lock)); |
854 |
> |
assertEquals(s, lock.tryConvertToWriteLock(s)); |
855 |
> |
assertTrue(lock.validate(s)); |
856 |
> |
assertTrue(lock.isWriteLocked()); |
857 |
> |
writeUnlocker.accept(lock, s); |
858 |
> |
} |
859 |
> |
|
860 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) { |
861 |
> |
s = assertValid(lock, readLocker.apply(lock)); |
862 |
> |
p = assertValid(lock, lock.tryConvertToWriteLock(s)); |
863 |
> |
assertFalse(lock.validate(s)); |
864 |
> |
assertTrue(lock.validate(p)); |
865 |
> |
assertTrue(lock.isWriteLocked()); |
866 |
> |
writeUnlocker.accept(lock, p); |
867 |
> |
} |
868 |
> |
} |
869 |
|
|
870 |
< |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
871 |
< |
assertTrue(lock.validate(s)); |
872 |
< |
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
873 |
< |
assertTrue(lock.validate(p)); |
874 |
< |
assertTrue(lock.isWriteLocked()); |
875 |
< |
lock.unlockWrite(p); |
870 |
> |
// failure if multiply read locked |
871 |
> |
for (Function<StampedLock, Long> readLocker : readLockers()) { |
872 |
> |
s = assertValid(lock, readLocker.apply(lock)); |
873 |
> |
p = assertValid(lock, readLocker.apply(lock)); |
874 |
> |
assertEquals(0L, lock.tryConvertToWriteLock(s)); |
875 |
> |
assertTrue(lock.validate(s)); |
876 |
> |
assertTrue(lock.validate(p)); |
877 |
> |
assertEquals(2, lock.getReadLockCount()); |
878 |
> |
lock.unlock(p); |
879 |
> |
lock.unlock(s); |
880 |
> |
assertUnlocked(lock); |
881 |
> |
} |
882 |
|
} |
883 |
|
|
884 |
|
/** |
885 |
|
* asWriteLock can be locked and unlocked |
886 |
|
*/ |
887 |
< |
public void testAsWriteLock() { |
887 |
> |
public void testAsWriteLock() throws Throwable { |
888 |
|
StampedLock sl = new StampedLock(); |
889 |
|
Lock lock = sl.asWriteLock(); |
890 |
< |
lock.lock(); |
891 |
< |
assertFalse(lock.tryLock()); |
892 |
< |
lock.unlock(); |
893 |
< |
assertTrue(lock.tryLock()); |
890 |
> |
for (Action locker : lockLockers(lock)) { |
891 |
> |
locker.run(); |
892 |
> |
assertTrue(sl.isWriteLocked()); |
893 |
> |
assertFalse(sl.isReadLocked()); |
894 |
> |
assertFalse(lock.tryLock()); |
895 |
> |
lock.unlock(); |
896 |
> |
assertUnlocked(sl); |
897 |
> |
} |
898 |
|
} |
899 |
|
|
900 |
|
/** |
901 |
|
* asReadLock can be locked and unlocked |
902 |
|
*/ |
903 |
< |
public void testAsReadLock() { |
903 |
> |
public void testAsReadLock() throws Throwable { |
904 |
|
StampedLock sl = new StampedLock(); |
905 |
|
Lock lock = sl.asReadLock(); |
906 |
< |
lock.lock(); |
907 |
< |
lock.unlock(); |
908 |
< |
assertTrue(lock.tryLock()); |
906 |
> |
for (Action locker : lockLockers(lock)) { |
907 |
> |
locker.run(); |
908 |
> |
assertTrue(sl.isReadLocked()); |
909 |
> |
assertFalse(sl.isWriteLocked()); |
910 |
> |
assertEquals(1, sl.getReadLockCount()); |
911 |
> |
locker.run(); |
912 |
> |
assertTrue(sl.isReadLocked()); |
913 |
> |
assertEquals(2, sl.getReadLockCount()); |
914 |
> |
lock.unlock(); |
915 |
> |
lock.unlock(); |
916 |
> |
assertUnlocked(sl); |
917 |
> |
} |
918 |
|
} |
919 |
|
|
920 |
|
/** |
921 |
|
* asReadWriteLock.writeLock can be locked and unlocked |
922 |
|
*/ |
923 |
< |
public void testAsReadWriteLockWriteLock() { |
923 |
> |
public void testAsReadWriteLockWriteLock() throws Throwable { |
924 |
|
StampedLock sl = new StampedLock(); |
925 |
|
Lock lock = sl.asReadWriteLock().writeLock(); |
926 |
< |
lock.lock(); |
927 |
< |
assertFalse(lock.tryLock()); |
928 |
< |
lock.unlock(); |
929 |
< |
assertTrue(lock.tryLock()); |
926 |
> |
for (Action locker : lockLockers(lock)) { |
927 |
> |
locker.run(); |
928 |
> |
assertTrue(sl.isWriteLocked()); |
929 |
> |
assertFalse(sl.isReadLocked()); |
930 |
> |
assertFalse(lock.tryLock()); |
931 |
> |
lock.unlock(); |
932 |
> |
assertUnlocked(sl); |
933 |
> |
} |
934 |
|
} |
935 |
|
|
936 |
|
/** |
937 |
|
* asReadWriteLock.readLock can be locked and unlocked |
938 |
|
*/ |
939 |
< |
public void testAsReadWriteLockReadLock() { |
939 |
> |
public void testAsReadWriteLockReadLock() throws Throwable { |
940 |
|
StampedLock sl = new StampedLock(); |
941 |
|
Lock lock = sl.asReadWriteLock().readLock(); |
942 |
< |
lock.lock(); |
943 |
< |
lock.unlock(); |
944 |
< |
assertTrue(lock.tryLock()); |
942 |
> |
for (Action locker : lockLockers(lock)) { |
943 |
> |
locker.run(); |
944 |
> |
assertTrue(sl.isReadLocked()); |
945 |
> |
assertFalse(sl.isWriteLocked()); |
946 |
> |
assertEquals(1, sl.getReadLockCount()); |
947 |
> |
locker.run(); |
948 |
> |
assertTrue(sl.isReadLocked()); |
949 |
> |
assertEquals(2, sl.getReadLockCount()); |
950 |
> |
lock.unlock(); |
951 |
> |
lock.unlock(); |
952 |
> |
assertUnlocked(sl); |
953 |
> |
} |
954 |
|
} |
955 |
|
|
956 |
|
/** |
973 |
|
Runnable[] actions = { |
974 |
|
() -> { |
975 |
|
StampedLock sl = new StampedLock(); |
976 |
< |
long stamp = sl.tryOptimisticRead(); |
955 |
< |
assertTrue(stamp != 0); |
976 |
> |
long stamp = assertValid(sl, sl.tryOptimisticRead()); |
977 |
|
sl.unlockRead(stamp); |
978 |
|
}, |
979 |
|
() -> { |
990 |
|
}, |
991 |
|
() -> { |
992 |
|
StampedLock sl = new StampedLock(); |
972 |
– |
long stamp = sl.tryOptimisticRead(); |
993 |
|
sl.readLock(); |
994 |
+ |
long stamp = assertValid(sl, sl.tryOptimisticRead()); |
995 |
|
sl.unlockRead(stamp); |
996 |
|
}, |
997 |
|
() -> { |
998 |
|
StampedLock sl = new StampedLock(); |
978 |
– |
long stamp = sl.tryOptimisticRead(); |
999 |
|
sl.readLock(); |
1000 |
+ |
long stamp = assertValid(sl, sl.tryOptimisticRead()); |
1001 |
|
sl.unlock(stamp); |
1002 |
|
}, |
1003 |
|
|
1004 |
|
() -> { |
1005 |
|
StampedLock sl = new StampedLock(); |
1006 |
|
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1007 |
< |
assertTrue(stamp != 0); |
1007 |
> |
assertValid(sl, stamp); |
1008 |
|
sl.writeLock(); |
1009 |
|
sl.unlockWrite(stamp); |
1010 |
|
}, |
1030 |
|
() -> { |
1031 |
|
StampedLock sl = new StampedLock(); |
1032 |
|
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1033 |
< |
assertTrue(stamp != 0); |
1033 |
> |
assertValid(sl, stamp); |
1034 |
|
sl.writeLock(); |
1035 |
|
sl.unlockWrite(stamp); |
1036 |
|
}, |
1050 |
|
StampedLock sl = new StampedLock(); |
1051 |
|
sl.readLock(); |
1052 |
|
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1053 |
< |
assertTrue(stamp != 0); |
1053 |
> |
assertValid(sl, stamp); |
1054 |
|
sl.readLock(); |
1055 |
|
sl.unlockRead(stamp); |
1056 |
|
}, |
1072 |
|
assertThrows(IllegalMonitorStateException.class, actions); |
1073 |
|
} |
1074 |
|
|
1075 |
+ |
static long writeLockInterruptiblyUninterrupted(StampedLock sl) { |
1076 |
+ |
try { return sl.writeLockInterruptibly(); } |
1077 |
+ |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1078 |
+ |
} |
1079 |
+ |
|
1080 |
+ |
static long tryWriteLockUninterrupted(StampedLock sl, long time, TimeUnit unit) { |
1081 |
+ |
try { return sl.tryWriteLock(time, unit); } |
1082 |
+ |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1083 |
+ |
} |
1084 |
+ |
|
1085 |
+ |
static long readLockInterruptiblyUninterrupted(StampedLock sl) { |
1086 |
+ |
try { return sl.readLockInterruptibly(); } |
1087 |
+ |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1088 |
+ |
} |
1089 |
+ |
|
1090 |
+ |
static long tryReadLockUninterrupted(StampedLock sl, long time, TimeUnit unit) { |
1091 |
+ |
try { return sl.tryReadLock(time, unit); } |
1092 |
+ |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1093 |
+ |
} |
1094 |
+ |
|
1095 |
+ |
/** |
1096 |
+ |
* Invalid stamps result in IllegalMonitorStateException |
1097 |
+ |
*/ |
1098 |
+ |
public void testInvalidStampsThrowIllegalMonitorStateException() { |
1099 |
+ |
final StampedLock sl = new StampedLock(); |
1100 |
+ |
|
1101 |
+ |
assertThrows(IllegalMonitorStateException.class, |
1102 |
+ |
() -> sl.unlockWrite(0L), |
1103 |
+ |
() -> sl.unlockRead(0L), |
1104 |
+ |
() -> sl.unlock(0L)); |
1105 |
+ |
|
1106 |
+ |
final long optimisticStamp = sl.tryOptimisticRead(); |
1107 |
+ |
final long readStamp = sl.readLock(); |
1108 |
+ |
sl.unlockRead(readStamp); |
1109 |
+ |
final long writeStamp = sl.writeLock(); |
1110 |
+ |
sl.unlockWrite(writeStamp); |
1111 |
+ |
assertTrue(optimisticStamp != 0L && readStamp != 0L && writeStamp != 0L); |
1112 |
+ |
final long[] noLongerValidStamps = { optimisticStamp, readStamp, writeStamp }; |
1113 |
+ |
final Runnable assertNoLongerValidStampsThrow = () -> { |
1114 |
+ |
for (long noLongerValidStamp : noLongerValidStamps) |
1115 |
+ |
assertThrows(IllegalMonitorStateException.class, |
1116 |
+ |
() -> sl.unlockWrite(noLongerValidStamp), |
1117 |
+ |
() -> sl.unlockRead(noLongerValidStamp), |
1118 |
+ |
() -> sl.unlock(noLongerValidStamp)); |
1119 |
+ |
}; |
1120 |
+ |
assertNoLongerValidStampsThrow.run(); |
1121 |
+ |
|
1122 |
+ |
for (Function<StampedLock, Long> readLocker : readLockers()) |
1123 |
+ |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) { |
1124 |
+ |
final long stamp = readLocker.apply(sl); |
1125 |
+ |
assertValid(sl, stamp); |
1126 |
+ |
assertNoLongerValidStampsThrow.run(); |
1127 |
+ |
assertThrows(IllegalMonitorStateException.class, |
1128 |
+ |
() -> sl.unlockWrite(stamp), |
1129 |
+ |
() -> sl.unlockRead(sl.tryOptimisticRead()), |
1130 |
+ |
() -> sl.unlockRead(0L)); |
1131 |
+ |
readUnlocker.accept(sl, stamp); |
1132 |
+ |
assertUnlocked(sl); |
1133 |
+ |
assertNoLongerValidStampsThrow.run(); |
1134 |
+ |
} |
1135 |
+ |
|
1136 |
+ |
for (Function<StampedLock, Long> writeLocker : writeLockers()) |
1137 |
+ |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) { |
1138 |
+ |
final long stamp = writeLocker.apply(sl); |
1139 |
+ |
assertValid(sl, stamp); |
1140 |
+ |
assertNoLongerValidStampsThrow.run(); |
1141 |
+ |
assertThrows(IllegalMonitorStateException.class, |
1142 |
+ |
() -> sl.unlockRead(stamp), |
1143 |
+ |
() -> sl.unlockWrite(0L)); |
1144 |
+ |
writeUnlocker.accept(sl, stamp); |
1145 |
+ |
assertUnlocked(sl); |
1146 |
+ |
assertNoLongerValidStampsThrow.run(); |
1147 |
+ |
} |
1148 |
+ |
} |
1149 |
+ |
|
1150 |
+ |
/** |
1151 |
+ |
* Read locks can be very deeply nested |
1152 |
+ |
*/ |
1153 |
+ |
public void testDeeplyNestedReadLocks() { |
1154 |
+ |
final StampedLock lock = new StampedLock(); |
1155 |
+ |
final int depth = 300; |
1156 |
+ |
final long[] stamps = new long[depth]; |
1157 |
+ |
final List<Function<StampedLock, Long>> readLockers = readLockers(); |
1158 |
+ |
final List<BiConsumer<StampedLock, Long>> readUnlockers = readUnlockers(); |
1159 |
+ |
for (int i = 0; i < depth; i++) { |
1160 |
+ |
Function<StampedLock, Long> readLocker |
1161 |
+ |
= readLockers.get(i % readLockers.size()); |
1162 |
+ |
long stamp = readLocker.apply(lock); |
1163 |
+ |
assertEquals(i + 1, lock.getReadLockCount()); |
1164 |
+ |
assertTrue(lock.isReadLocked()); |
1165 |
+ |
stamps[i] = stamp; |
1166 |
+ |
} |
1167 |
+ |
for (int i = 0; i < depth; i++) { |
1168 |
+ |
BiConsumer<StampedLock, Long> readUnlocker |
1169 |
+ |
= readUnlockers.get(i % readUnlockers.size()); |
1170 |
+ |
assertEquals(depth - i, lock.getReadLockCount()); |
1171 |
+ |
assertTrue(lock.isReadLocked()); |
1172 |
+ |
readUnlocker.accept(lock, stamps[depth - 1 - i]); |
1173 |
+ |
} |
1174 |
+ |
assertUnlocked(lock); |
1175 |
+ |
} |
1176 |
|
} |