Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Written by Doug Lea with assistance from members of JCP JSR-166 |
| 3 | * Expert Group and released to the public domain, as explained at |
| 4 | * http://creativecommons.org/publicdomain/zero/1.0/ |
| 5 | * Other contributors include Andrew Wright, Jeffrey Hayes, |
| 6 | * Pat Fisher, Mike Judd. |
| 7 | */ |
| 8 | |
| 9 | package jsr166; |
| 10 | |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 11 | import static java.util.concurrent.TimeUnit.MILLISECONDS; |
| 12 | |
| 13 | import java.util.Arrays; |
| 14 | import java.util.Collection; |
| 15 | import java.util.HashSet; |
| 16 | import java.util.concurrent.CountDownLatch; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 17 | import java.util.concurrent.atomic.AtomicBoolean; |
| 18 | import java.util.concurrent.locks.Condition; |
| 19 | import java.util.concurrent.locks.Lock; |
| 20 | import java.util.concurrent.locks.ReentrantReadWriteLock; |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 21 | |
| 22 | import junit.framework.AssertionFailedError; |
| 23 | import junit.framework.Test; |
| 24 | import junit.framework.TestSuite; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 25 | |
| 26 | public class ReentrantReadWriteLockTest extends JSR166TestCase { |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 27 | // android-note: Removed because the CTS runner does a bad job of |
| 28 | // retrying tests that have suite() declarations. |
| 29 | // |
| 30 | // public static void main(String[] args) { |
| 31 | // main(suite(), args); |
| 32 | // } |
| 33 | // public static Test suite() { |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 34 | // return new TestSuite(ReentrantReadWriteLockTest.class); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 35 | // } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 36 | |
| 37 | /** |
| 38 | * A runnable calling lockInterruptibly |
| 39 | */ |
| 40 | class InterruptibleLockRunnable extends CheckedRunnable { |
| 41 | final ReentrantReadWriteLock lock; |
| 42 | InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
| 43 | public void realRun() throws InterruptedException { |
| 44 | lock.writeLock().lockInterruptibly(); |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * A runnable calling lockInterruptibly that expects to be |
| 50 | * interrupted |
| 51 | */ |
| 52 | class InterruptedLockRunnable extends CheckedInterruptedRunnable { |
| 53 | final ReentrantReadWriteLock lock; |
| 54 | InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
| 55 | public void realRun() throws InterruptedException { |
| 56 | lock.writeLock().lockInterruptibly(); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Subclass to expose protected methods |
| 62 | */ |
| 63 | static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock { |
| 64 | PublicReentrantReadWriteLock() { super(); } |
| 65 | PublicReentrantReadWriteLock(boolean fair) { super(fair); } |
| 66 | public Thread getOwner() { |
| 67 | return super.getOwner(); |
| 68 | } |
| 69 | public Collection<Thread> getQueuedThreads() { |
| 70 | return super.getQueuedThreads(); |
| 71 | } |
| 72 | public Collection<Thread> getWaitingThreads(Condition c) { |
| 73 | return super.getWaitingThreads(c); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Releases write lock, checking that it had a hold count of 1. |
| 79 | */ |
| 80 | void releaseWriteLock(PublicReentrantReadWriteLock lock) { |
| 81 | ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock(); |
| 82 | assertWriteLockedByMoi(lock); |
| 83 | assertEquals(1, lock.getWriteHoldCount()); |
| 84 | writeLock.unlock(); |
| 85 | assertNotWriteLocked(lock); |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Spin-waits until lock.hasQueuedThread(t) becomes true. |
| 90 | */ |
| 91 | void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) { |
| 92 | long startTime = System.nanoTime(); |
| 93 | while (!lock.hasQueuedThread(t)) { |
| 94 | if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
| 95 | throw new AssertionFailedError("timed out"); |
| 96 | Thread.yield(); |
| 97 | } |
| 98 | assertTrue(t.isAlive()); |
| 99 | assertNotSame(t, lock.getOwner()); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Checks that lock is not write-locked. |
| 104 | */ |
| 105 | void assertNotWriteLocked(PublicReentrantReadWriteLock lock) { |
| 106 | assertFalse(lock.isWriteLocked()); |
| 107 | assertFalse(lock.isWriteLockedByCurrentThread()); |
| 108 | assertFalse(lock.writeLock().isHeldByCurrentThread()); |
| 109 | assertEquals(0, lock.getWriteHoldCount()); |
| 110 | assertEquals(0, lock.writeLock().getHoldCount()); |
| 111 | assertNull(lock.getOwner()); |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Checks that lock is write-locked by the given thread. |
| 116 | */ |
| 117 | void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) { |
| 118 | assertTrue(lock.isWriteLocked()); |
| 119 | assertSame(t, lock.getOwner()); |
| 120 | assertEquals(t == Thread.currentThread(), |
| 121 | lock.isWriteLockedByCurrentThread()); |
| 122 | assertEquals(t == Thread.currentThread(), |
| 123 | lock.writeLock().isHeldByCurrentThread()); |
| 124 | assertEquals(t == Thread.currentThread(), |
| 125 | lock.getWriteHoldCount() > 0); |
| 126 | assertEquals(t == Thread.currentThread(), |
| 127 | lock.writeLock().getHoldCount() > 0); |
| 128 | assertEquals(0, lock.getReadLockCount()); |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Checks that lock is write-locked by the current thread. |
| 133 | */ |
| 134 | void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) { |
| 135 | assertWriteLockedBy(lock, Thread.currentThread()); |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Checks that condition c has no waiters. |
| 140 | */ |
| 141 | void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) { |
| 142 | assertHasWaiters(lock, c, new Thread[] {}); |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Checks that condition c has exactly the given waiter threads. |
| 147 | */ |
| 148 | void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c, |
| 149 | Thread... threads) { |
| 150 | lock.writeLock().lock(); |
| 151 | assertEquals(threads.length > 0, lock.hasWaiters(c)); |
| 152 | assertEquals(threads.length, lock.getWaitQueueLength(c)); |
| 153 | assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty()); |
| 154 | assertEquals(threads.length, lock.getWaitingThreads(c).size()); |
| 155 | assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)), |
| 156 | new HashSet<Thread>(Arrays.asList(threads))); |
| 157 | lock.writeLock().unlock(); |
| 158 | } |
| 159 | |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 160 | enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 161 | |
| 162 | /** |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 163 | * Awaits condition "indefinitely" using the specified AwaitMethod. |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 164 | */ |
| 165 | void await(Condition c, AwaitMethod awaitMethod) |
| 166 | throws InterruptedException { |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 167 | long timeoutMillis = 2 * LONG_DELAY_MS; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 168 | switch (awaitMethod) { |
| 169 | case await: |
| 170 | c.await(); |
| 171 | break; |
| 172 | case awaitTimed: |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 173 | assertTrue(c.await(timeoutMillis, MILLISECONDS)); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 174 | break; |
| 175 | case awaitNanos: |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 176 | long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
| 177 | long nanosRemaining = c.awaitNanos(timeoutNanos); |
| 178 | assertTrue(nanosRemaining > timeoutNanos / 2); |
| 179 | assertTrue(nanosRemaining <= timeoutNanos); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 180 | break; |
| 181 | case awaitUntil: |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 182 | assertTrue(c.awaitUntil(delayedDate(timeoutMillis))); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 183 | break; |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 184 | default: |
| 185 | throw new AssertionError(); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 186 | } |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * Constructor sets given fairness, and is in unlocked state |
| 191 | */ |
| 192 | public void testConstructor() { |
| 193 | PublicReentrantReadWriteLock lock; |
| 194 | |
| 195 | lock = new PublicReentrantReadWriteLock(); |
| 196 | assertFalse(lock.isFair()); |
| 197 | assertNotWriteLocked(lock); |
| 198 | assertEquals(0, lock.getReadLockCount()); |
| 199 | |
| 200 | lock = new PublicReentrantReadWriteLock(true); |
| 201 | assertTrue(lock.isFair()); |
| 202 | assertNotWriteLocked(lock); |
| 203 | assertEquals(0, lock.getReadLockCount()); |
| 204 | |
| 205 | lock = new PublicReentrantReadWriteLock(false); |
| 206 | assertFalse(lock.isFair()); |
| 207 | assertNotWriteLocked(lock); |
| 208 | assertEquals(0, lock.getReadLockCount()); |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * write-locking and read-locking an unlocked lock succeed |
| 213 | */ |
| 214 | public void testLock() { testLock(false); } |
| 215 | public void testLock_fair() { testLock(true); } |
| 216 | public void testLock(boolean fair) { |
| 217 | PublicReentrantReadWriteLock lock = |
| 218 | new PublicReentrantReadWriteLock(fair); |
| 219 | assertNotWriteLocked(lock); |
| 220 | lock.writeLock().lock(); |
| 221 | assertWriteLockedByMoi(lock); |
| 222 | lock.writeLock().unlock(); |
| 223 | assertNotWriteLocked(lock); |
| 224 | assertEquals(0, lock.getReadLockCount()); |
| 225 | lock.readLock().lock(); |
| 226 | assertNotWriteLocked(lock); |
| 227 | assertEquals(1, lock.getReadLockCount()); |
| 228 | lock.readLock().unlock(); |
| 229 | assertNotWriteLocked(lock); |
| 230 | assertEquals(0, lock.getReadLockCount()); |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * getWriteHoldCount returns number of recursive holds |
| 235 | */ |
| 236 | public void testGetWriteHoldCount() { testGetWriteHoldCount(false); } |
| 237 | public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); } |
| 238 | public void testGetWriteHoldCount(boolean fair) { |
| 239 | ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 240 | for (int i = 1; i <= SIZE; i++) { |
| 241 | lock.writeLock().lock(); |
| 242 | assertEquals(i,lock.getWriteHoldCount()); |
| 243 | } |
| 244 | for (int i = SIZE; i > 0; i--) { |
| 245 | lock.writeLock().unlock(); |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 246 | assertEquals(i - 1,lock.getWriteHoldCount()); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 247 | } |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * writelock.getHoldCount returns number of recursive holds |
| 252 | */ |
| 253 | public void testGetHoldCount() { testGetHoldCount(false); } |
| 254 | public void testGetHoldCount_fair() { testGetHoldCount(true); } |
| 255 | public void testGetHoldCount(boolean fair) { |
| 256 | ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 257 | for (int i = 1; i <= SIZE; i++) { |
| 258 | lock.writeLock().lock(); |
| 259 | assertEquals(i,lock.writeLock().getHoldCount()); |
| 260 | } |
| 261 | for (int i = SIZE; i > 0; i--) { |
| 262 | lock.writeLock().unlock(); |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 263 | assertEquals(i - 1,lock.writeLock().getHoldCount()); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 264 | } |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * getReadHoldCount returns number of recursive holds |
| 269 | */ |
| 270 | public void testGetReadHoldCount() { testGetReadHoldCount(false); } |
| 271 | public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); } |
| 272 | public void testGetReadHoldCount(boolean fair) { |
| 273 | ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 274 | for (int i = 1; i <= SIZE; i++) { |
| 275 | lock.readLock().lock(); |
| 276 | assertEquals(i,lock.getReadHoldCount()); |
| 277 | } |
| 278 | for (int i = SIZE; i > 0; i--) { |
| 279 | lock.readLock().unlock(); |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 280 | assertEquals(i - 1,lock.getReadHoldCount()); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 281 | } |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * write-unlocking an unlocked lock throws IllegalMonitorStateException |
| 286 | */ |
| 287 | public void testWriteUnlock_IMSE() { testWriteUnlock_IMSE(false); } |
| 288 | public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); } |
| 289 | public void testWriteUnlock_IMSE(boolean fair) { |
| 290 | ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 291 | try { |
| 292 | lock.writeLock().unlock(); |
| 293 | shouldThrow(); |
| 294 | } catch (IllegalMonitorStateException success) {} |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * read-unlocking an unlocked lock throws IllegalMonitorStateException |
| 299 | */ |
| 300 | public void testReadUnlock_IMSE() { testReadUnlock_IMSE(false); } |
| 301 | public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); } |
| 302 | public void testReadUnlock_IMSE(boolean fair) { |
| 303 | ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 304 | try { |
| 305 | lock.readLock().unlock(); |
| 306 | shouldThrow(); |
| 307 | } catch (IllegalMonitorStateException success) {} |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * write-lockInterruptibly is interruptible |
| 312 | */ |
| 313 | public void testWriteLockInterruptibly_Interruptible() { testWriteLockInterruptibly_Interruptible(false); } |
| 314 | public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); } |
| 315 | public void testWriteLockInterruptibly_Interruptible(boolean fair) { |
| 316 | final PublicReentrantReadWriteLock lock = |
| 317 | new PublicReentrantReadWriteLock(fair); |
| 318 | lock.writeLock().lock(); |
| 319 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 320 | public void realRun() throws InterruptedException { |
| 321 | lock.writeLock().lockInterruptibly(); |
| 322 | }}); |
| 323 | |
| 324 | waitForQueuedThread(lock, t); |
| 325 | t.interrupt(); |
| 326 | awaitTermination(t); |
| 327 | releaseWriteLock(lock); |
| 328 | } |
| 329 | |
| 330 | /** |
| 331 | * timed write-tryLock is interruptible |
| 332 | */ |
| 333 | public void testWriteTryLock_Interruptible() { testWriteTryLock_Interruptible(false); } |
| 334 | public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); } |
| 335 | public void testWriteTryLock_Interruptible(boolean fair) { |
| 336 | final PublicReentrantReadWriteLock lock = |
| 337 | new PublicReentrantReadWriteLock(fair); |
| 338 | lock.writeLock().lock(); |
| 339 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 340 | public void realRun() throws InterruptedException { |
| 341 | lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS); |
| 342 | }}); |
| 343 | |
| 344 | waitForQueuedThread(lock, t); |
| 345 | t.interrupt(); |
| 346 | awaitTermination(t); |
| 347 | releaseWriteLock(lock); |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * read-lockInterruptibly is interruptible |
| 352 | */ |
| 353 | public void testReadLockInterruptibly_Interruptible() { testReadLockInterruptibly_Interruptible(false); } |
| 354 | public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); } |
| 355 | public void testReadLockInterruptibly_Interruptible(boolean fair) { |
| 356 | final PublicReentrantReadWriteLock lock = |
| 357 | new PublicReentrantReadWriteLock(fair); |
| 358 | lock.writeLock().lock(); |
| 359 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 360 | public void realRun() throws InterruptedException { |
| 361 | lock.readLock().lockInterruptibly(); |
| 362 | }}); |
| 363 | |
| 364 | waitForQueuedThread(lock, t); |
| 365 | t.interrupt(); |
| 366 | awaitTermination(t); |
| 367 | releaseWriteLock(lock); |
| 368 | } |
| 369 | |
| 370 | /** |
| 371 | * timed read-tryLock is interruptible |
| 372 | */ |
| 373 | public void testReadTryLock_Interruptible() { testReadTryLock_Interruptible(false); } |
| 374 | public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); } |
| 375 | public void testReadTryLock_Interruptible(boolean fair) { |
| 376 | final PublicReentrantReadWriteLock lock = |
| 377 | new PublicReentrantReadWriteLock(fair); |
| 378 | lock.writeLock().lock(); |
| 379 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 380 | public void realRun() throws InterruptedException { |
| 381 | lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS); |
| 382 | }}); |
| 383 | |
| 384 | waitForQueuedThread(lock, t); |
| 385 | t.interrupt(); |
| 386 | awaitTermination(t); |
| 387 | releaseWriteLock(lock); |
| 388 | } |
| 389 | |
| 390 | /** |
| 391 | * write-tryLock on an unlocked lock succeeds |
| 392 | */ |
| 393 | public void testWriteTryLock() { testWriteTryLock(false); } |
| 394 | public void testWriteTryLock_fair() { testWriteTryLock(true); } |
| 395 | public void testWriteTryLock(boolean fair) { |
| 396 | final PublicReentrantReadWriteLock lock = |
| 397 | new PublicReentrantReadWriteLock(fair); |
| 398 | assertTrue(lock.writeLock().tryLock()); |
| 399 | assertWriteLockedByMoi(lock); |
| 400 | assertTrue(lock.writeLock().tryLock()); |
| 401 | assertWriteLockedByMoi(lock); |
| 402 | lock.writeLock().unlock(); |
| 403 | releaseWriteLock(lock); |
| 404 | } |
| 405 | |
| 406 | /** |
| 407 | * write-tryLock fails if locked |
| 408 | */ |
| 409 | public void testWriteTryLockWhenLocked() { testWriteTryLockWhenLocked(false); } |
| 410 | public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); } |
| 411 | public void testWriteTryLockWhenLocked(boolean fair) { |
| 412 | final PublicReentrantReadWriteLock lock = |
| 413 | new PublicReentrantReadWriteLock(fair); |
| 414 | lock.writeLock().lock(); |
| 415 | Thread t = newStartedThread(new CheckedRunnable() { |
| 416 | public void realRun() { |
| 417 | assertFalse(lock.writeLock().tryLock()); |
| 418 | }}); |
| 419 | |
| 420 | awaitTermination(t); |
| 421 | releaseWriteLock(lock); |
| 422 | } |
| 423 | |
| 424 | /** |
| 425 | * read-tryLock fails if locked |
| 426 | */ |
| 427 | public void testReadTryLockWhenLocked() { testReadTryLockWhenLocked(false); } |
| 428 | public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); } |
| 429 | public void testReadTryLockWhenLocked(boolean fair) { |
| 430 | final PublicReentrantReadWriteLock lock = |
| 431 | new PublicReentrantReadWriteLock(fair); |
| 432 | lock.writeLock().lock(); |
| 433 | Thread t = newStartedThread(new CheckedRunnable() { |
| 434 | public void realRun() { |
| 435 | assertFalse(lock.readLock().tryLock()); |
| 436 | }}); |
| 437 | |
| 438 | awaitTermination(t); |
| 439 | releaseWriteLock(lock); |
| 440 | } |
| 441 | |
| 442 | /** |
| 443 | * Multiple threads can hold a read lock when not write-locked |
| 444 | */ |
| 445 | public void testMultipleReadLocks() { testMultipleReadLocks(false); } |
| 446 | public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); } |
| 447 | public void testMultipleReadLocks(boolean fair) { |
| 448 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 449 | lock.readLock().lock(); |
| 450 | Thread t = newStartedThread(new CheckedRunnable() { |
| 451 | public void realRun() throws InterruptedException { |
| 452 | assertTrue(lock.readLock().tryLock()); |
| 453 | lock.readLock().unlock(); |
| 454 | assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS)); |
| 455 | lock.readLock().unlock(); |
| 456 | lock.readLock().lock(); |
| 457 | lock.readLock().unlock(); |
| 458 | }}); |
| 459 | |
| 460 | awaitTermination(t); |
| 461 | lock.readLock().unlock(); |
| 462 | } |
| 463 | |
| 464 | /** |
| 465 | * A writelock succeeds only after a reading thread unlocks |
| 466 | */ |
| 467 | public void testWriteAfterReadLock() { testWriteAfterReadLock(false); } |
| 468 | public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); } |
| 469 | public void testWriteAfterReadLock(boolean fair) { |
| 470 | final PublicReentrantReadWriteLock lock = |
| 471 | new PublicReentrantReadWriteLock(fair); |
| 472 | lock.readLock().lock(); |
| 473 | Thread t = newStartedThread(new CheckedRunnable() { |
| 474 | public void realRun() { |
| 475 | assertEquals(1, lock.getReadLockCount()); |
| 476 | lock.writeLock().lock(); |
| 477 | assertEquals(0, lock.getReadLockCount()); |
| 478 | lock.writeLock().unlock(); |
| 479 | }}); |
| 480 | waitForQueuedThread(lock, t); |
| 481 | assertNotWriteLocked(lock); |
| 482 | assertEquals(1, lock.getReadLockCount()); |
| 483 | lock.readLock().unlock(); |
| 484 | assertEquals(0, lock.getReadLockCount()); |
| 485 | awaitTermination(t); |
| 486 | assertNotWriteLocked(lock); |
| 487 | } |
| 488 | |
| 489 | /** |
| 490 | * A writelock succeeds only after reading threads unlock |
| 491 | */ |
| 492 | public void testWriteAfterMultipleReadLocks() { testWriteAfterMultipleReadLocks(false); } |
| 493 | public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); } |
| 494 | public void testWriteAfterMultipleReadLocks(boolean fair) { |
| 495 | final PublicReentrantReadWriteLock lock = |
| 496 | new PublicReentrantReadWriteLock(fair); |
| 497 | lock.readLock().lock(); |
| 498 | lock.readLock().lock(); |
| 499 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 500 | public void realRun() { |
| 501 | lock.readLock().lock(); |
| 502 | assertEquals(3, lock.getReadLockCount()); |
| 503 | lock.readLock().unlock(); |
| 504 | }}); |
| 505 | awaitTermination(t1); |
| 506 | |
| 507 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 508 | public void realRun() { |
| 509 | assertEquals(2, lock.getReadLockCount()); |
| 510 | lock.writeLock().lock(); |
| 511 | assertEquals(0, lock.getReadLockCount()); |
| 512 | lock.writeLock().unlock(); |
| 513 | }}); |
| 514 | waitForQueuedThread(lock, t2); |
| 515 | assertNotWriteLocked(lock); |
| 516 | assertEquals(2, lock.getReadLockCount()); |
| 517 | lock.readLock().unlock(); |
| 518 | lock.readLock().unlock(); |
| 519 | assertEquals(0, lock.getReadLockCount()); |
| 520 | awaitTermination(t2); |
| 521 | assertNotWriteLocked(lock); |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * A thread that tries to acquire a fair read lock (non-reentrantly) |
| 526 | * will block if there is a waiting writer thread |
| 527 | */ |
| 528 | public void testReaderWriterReaderFairFifo() { |
| 529 | final PublicReentrantReadWriteLock lock = |
| 530 | new PublicReentrantReadWriteLock(true); |
| 531 | final AtomicBoolean t1GotLock = new AtomicBoolean(false); |
| 532 | |
| 533 | lock.readLock().lock(); |
| 534 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 535 | public void realRun() { |
| 536 | assertEquals(1, lock.getReadLockCount()); |
| 537 | lock.writeLock().lock(); |
| 538 | assertEquals(0, lock.getReadLockCount()); |
| 539 | t1GotLock.set(true); |
| 540 | lock.writeLock().unlock(); |
| 541 | }}); |
| 542 | waitForQueuedThread(lock, t1); |
| 543 | |
| 544 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 545 | public void realRun() { |
| 546 | assertEquals(1, lock.getReadLockCount()); |
| 547 | lock.readLock().lock(); |
| 548 | assertEquals(1, lock.getReadLockCount()); |
| 549 | assertTrue(t1GotLock.get()); |
| 550 | lock.readLock().unlock(); |
| 551 | }}); |
| 552 | waitForQueuedThread(lock, t2); |
| 553 | assertTrue(t1.isAlive()); |
| 554 | assertNotWriteLocked(lock); |
| 555 | assertEquals(1, lock.getReadLockCount()); |
| 556 | lock.readLock().unlock(); |
| 557 | awaitTermination(t1); |
| 558 | awaitTermination(t2); |
| 559 | assertNotWriteLocked(lock); |
| 560 | } |
| 561 | |
| 562 | /** |
| 563 | * Readlocks succeed only after a writing thread unlocks |
| 564 | */ |
| 565 | public void testReadAfterWriteLock() { testReadAfterWriteLock(false); } |
| 566 | public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); } |
| 567 | public void testReadAfterWriteLock(boolean fair) { |
| 568 | final PublicReentrantReadWriteLock lock = |
| 569 | new PublicReentrantReadWriteLock(fair); |
| 570 | lock.writeLock().lock(); |
| 571 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 572 | public void realRun() { |
| 573 | lock.readLock().lock(); |
| 574 | lock.readLock().unlock(); |
| 575 | }}); |
| 576 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 577 | public void realRun() { |
| 578 | lock.readLock().lock(); |
| 579 | lock.readLock().unlock(); |
| 580 | }}); |
| 581 | |
| 582 | waitForQueuedThread(lock, t1); |
| 583 | waitForQueuedThread(lock, t2); |
| 584 | releaseWriteLock(lock); |
| 585 | awaitTermination(t1); |
| 586 | awaitTermination(t2); |
| 587 | } |
| 588 | |
| 589 | /** |
| 590 | * Read trylock succeeds if write locked by current thread |
| 591 | */ |
| 592 | public void testReadHoldingWriteLock() { testReadHoldingWriteLock(false); } |
| 593 | public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); } |
| 594 | public void testReadHoldingWriteLock(boolean fair) { |
| 595 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 596 | lock.writeLock().lock(); |
| 597 | assertTrue(lock.readLock().tryLock()); |
| 598 | lock.readLock().unlock(); |
| 599 | lock.writeLock().unlock(); |
| 600 | } |
| 601 | |
| 602 | /** |
| 603 | * Read trylock succeeds (barging) even in the presence of waiting |
| 604 | * readers and/or writers |
| 605 | */ |
| 606 | public void testReadTryLockBarging() { testReadTryLockBarging(false); } |
| 607 | public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); } |
| 608 | public void testReadTryLockBarging(boolean fair) { |
| 609 | final PublicReentrantReadWriteLock lock = |
| 610 | new PublicReentrantReadWriteLock(fair); |
| 611 | lock.readLock().lock(); |
| 612 | |
| 613 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 614 | public void realRun() { |
| 615 | lock.writeLock().lock(); |
| 616 | lock.writeLock().unlock(); |
| 617 | }}); |
| 618 | |
| 619 | waitForQueuedThread(lock, t1); |
| 620 | |
| 621 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 622 | public void realRun() { |
| 623 | lock.readLock().lock(); |
| 624 | lock.readLock().unlock(); |
| 625 | }}); |
| 626 | |
| 627 | if (fair) |
| 628 | waitForQueuedThread(lock, t2); |
| 629 | |
| 630 | Thread t3 = newStartedThread(new CheckedRunnable() { |
| 631 | public void realRun() { |
| 632 | lock.readLock().tryLock(); |
| 633 | lock.readLock().unlock(); |
| 634 | }}); |
| 635 | |
| 636 | assertTrue(lock.getReadLockCount() > 0); |
| 637 | awaitTermination(t3); |
| 638 | assertTrue(t1.isAlive()); |
| 639 | if (fair) assertTrue(t2.isAlive()); |
| 640 | lock.readLock().unlock(); |
| 641 | awaitTermination(t1); |
| 642 | awaitTermination(t2); |
| 643 | } |
| 644 | |
| 645 | /** |
| 646 | * Read lock succeeds if write locked by current thread even if |
| 647 | * other threads are waiting for readlock |
| 648 | */ |
| 649 | public void testReadHoldingWriteLock2() { testReadHoldingWriteLock2(false); } |
| 650 | public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); } |
| 651 | public void testReadHoldingWriteLock2(boolean fair) { |
| 652 | final PublicReentrantReadWriteLock lock = |
| 653 | new PublicReentrantReadWriteLock(fair); |
| 654 | lock.writeLock().lock(); |
| 655 | lock.readLock().lock(); |
| 656 | lock.readLock().unlock(); |
| 657 | |
| 658 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 659 | public void realRun() { |
| 660 | lock.readLock().lock(); |
| 661 | lock.readLock().unlock(); |
| 662 | }}); |
| 663 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 664 | public void realRun() { |
| 665 | lock.readLock().lock(); |
| 666 | lock.readLock().unlock(); |
| 667 | }}); |
| 668 | |
| 669 | waitForQueuedThread(lock, t1); |
| 670 | waitForQueuedThread(lock, t2); |
| 671 | assertWriteLockedByMoi(lock); |
| 672 | lock.readLock().lock(); |
| 673 | lock.readLock().unlock(); |
| 674 | releaseWriteLock(lock); |
| 675 | awaitTermination(t1); |
| 676 | awaitTermination(t2); |
| 677 | } |
| 678 | |
| 679 | /** |
| 680 | * Read lock succeeds if write locked by current thread even if |
| 681 | * other threads are waiting for writelock |
| 682 | */ |
| 683 | public void testReadHoldingWriteLock3() { testReadHoldingWriteLock3(false); } |
| 684 | public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); } |
| 685 | public void testReadHoldingWriteLock3(boolean fair) { |
| 686 | final PublicReentrantReadWriteLock lock = |
| 687 | new PublicReentrantReadWriteLock(fair); |
| 688 | lock.writeLock().lock(); |
| 689 | lock.readLock().lock(); |
| 690 | lock.readLock().unlock(); |
| 691 | |
| 692 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 693 | public void realRun() { |
| 694 | lock.writeLock().lock(); |
| 695 | lock.writeLock().unlock(); |
| 696 | }}); |
| 697 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 698 | public void realRun() { |
| 699 | lock.writeLock().lock(); |
| 700 | lock.writeLock().unlock(); |
| 701 | }}); |
| 702 | |
| 703 | waitForQueuedThread(lock, t1); |
| 704 | waitForQueuedThread(lock, t2); |
| 705 | assertWriteLockedByMoi(lock); |
| 706 | lock.readLock().lock(); |
| 707 | lock.readLock().unlock(); |
| 708 | assertWriteLockedByMoi(lock); |
| 709 | lock.writeLock().unlock(); |
| 710 | awaitTermination(t1); |
| 711 | awaitTermination(t2); |
| 712 | } |
| 713 | |
| 714 | /** |
| 715 | * Write lock succeeds if write locked by current thread even if |
| 716 | * other threads are waiting for writelock |
| 717 | */ |
| 718 | public void testWriteHoldingWriteLock4() { testWriteHoldingWriteLock4(false); } |
| 719 | public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); } |
| 720 | public void testWriteHoldingWriteLock4(boolean fair) { |
| 721 | final PublicReentrantReadWriteLock lock = |
| 722 | new PublicReentrantReadWriteLock(fair); |
| 723 | lock.writeLock().lock(); |
| 724 | lock.writeLock().lock(); |
| 725 | lock.writeLock().unlock(); |
| 726 | |
| 727 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 728 | public void realRun() { |
| 729 | lock.writeLock().lock(); |
| 730 | lock.writeLock().unlock(); |
| 731 | }}); |
| 732 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 733 | public void realRun() { |
| 734 | lock.writeLock().lock(); |
| 735 | lock.writeLock().unlock(); |
| 736 | }}); |
| 737 | |
| 738 | waitForQueuedThread(lock, t1); |
| 739 | waitForQueuedThread(lock, t2); |
| 740 | assertWriteLockedByMoi(lock); |
| 741 | assertEquals(1, lock.getWriteHoldCount()); |
| 742 | lock.writeLock().lock(); |
| 743 | assertWriteLockedByMoi(lock); |
| 744 | assertEquals(2, lock.getWriteHoldCount()); |
| 745 | lock.writeLock().unlock(); |
| 746 | assertWriteLockedByMoi(lock); |
| 747 | assertEquals(1, lock.getWriteHoldCount()); |
| 748 | lock.writeLock().unlock(); |
| 749 | awaitTermination(t1); |
| 750 | awaitTermination(t2); |
| 751 | } |
| 752 | |
| 753 | /** |
| 754 | * Read tryLock succeeds if readlocked but not writelocked |
| 755 | */ |
| 756 | public void testTryLockWhenReadLocked() { testTryLockWhenReadLocked(false); } |
| 757 | public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); } |
| 758 | public void testTryLockWhenReadLocked(boolean fair) { |
| 759 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 760 | lock.readLock().lock(); |
| 761 | Thread t = newStartedThread(new CheckedRunnable() { |
| 762 | public void realRun() { |
| 763 | assertTrue(lock.readLock().tryLock()); |
| 764 | lock.readLock().unlock(); |
| 765 | }}); |
| 766 | |
| 767 | awaitTermination(t); |
| 768 | lock.readLock().unlock(); |
| 769 | } |
| 770 | |
| 771 | /** |
| 772 | * write tryLock fails when readlocked |
| 773 | */ |
| 774 | public void testWriteTryLockWhenReadLocked() { testWriteTryLockWhenReadLocked(false); } |
| 775 | public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); } |
| 776 | public void testWriteTryLockWhenReadLocked(boolean fair) { |
| 777 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 778 | lock.readLock().lock(); |
| 779 | Thread t = newStartedThread(new CheckedRunnable() { |
| 780 | public void realRun() { |
| 781 | assertFalse(lock.writeLock().tryLock()); |
| 782 | }}); |
| 783 | |
| 784 | awaitTermination(t); |
| 785 | lock.readLock().unlock(); |
| 786 | } |
| 787 | |
| 788 | /** |
| 789 | * write timed tryLock times out if locked |
| 790 | */ |
| 791 | public void testWriteTryLock_Timeout() { testWriteTryLock_Timeout(false); } |
| 792 | public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); } |
| 793 | public void testWriteTryLock_Timeout(boolean fair) { |
| 794 | final PublicReentrantReadWriteLock lock = |
| 795 | new PublicReentrantReadWriteLock(fair); |
| 796 | lock.writeLock().lock(); |
| 797 | Thread t = newStartedThread(new CheckedRunnable() { |
| 798 | public void realRun() throws InterruptedException { |
| 799 | long startTime = System.nanoTime(); |
| 800 | long timeoutMillis = 10; |
| 801 | assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS)); |
| 802 | assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
| 803 | }}); |
| 804 | |
| 805 | awaitTermination(t); |
| 806 | releaseWriteLock(lock); |
| 807 | } |
| 808 | |
| 809 | /** |
| 810 | * read timed tryLock times out if write-locked |
| 811 | */ |
| 812 | public void testReadTryLock_Timeout() { testReadTryLock_Timeout(false); } |
| 813 | public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); } |
| 814 | public void testReadTryLock_Timeout(boolean fair) { |
| 815 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 816 | lock.writeLock().lock(); |
| 817 | Thread t = newStartedThread(new CheckedRunnable() { |
| 818 | public void realRun() throws InterruptedException { |
| 819 | long startTime = System.nanoTime(); |
| 820 | long timeoutMillis = 10; |
| 821 | assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS)); |
| 822 | assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
| 823 | }}); |
| 824 | |
| 825 | awaitTermination(t); |
| 826 | assertTrue(lock.writeLock().isHeldByCurrentThread()); |
| 827 | lock.writeLock().unlock(); |
| 828 | } |
| 829 | |
| 830 | /** |
| 831 | * write lockInterruptibly succeeds if unlocked, else is interruptible |
| 832 | */ |
| 833 | public void testWriteLockInterruptibly() { testWriteLockInterruptibly(false); } |
| 834 | public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); } |
| 835 | public void testWriteLockInterruptibly(boolean fair) { |
| 836 | final PublicReentrantReadWriteLock lock = |
| 837 | new PublicReentrantReadWriteLock(fair); |
| 838 | try { |
| 839 | lock.writeLock().lockInterruptibly(); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 840 | } catch (InterruptedException fail) { threadUnexpectedException(fail); } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 841 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 842 | public void realRun() throws InterruptedException { |
| 843 | lock.writeLock().lockInterruptibly(); |
| 844 | }}); |
| 845 | |
| 846 | waitForQueuedThread(lock, t); |
| 847 | t.interrupt(); |
| 848 | assertTrue(lock.writeLock().isHeldByCurrentThread()); |
| 849 | awaitTermination(t); |
| 850 | releaseWriteLock(lock); |
| 851 | } |
| 852 | |
| 853 | /** |
| 854 | * read lockInterruptibly succeeds if lock free else is interruptible |
| 855 | */ |
| 856 | public void testReadLockInterruptibly() { testReadLockInterruptibly(false); } |
| 857 | public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); } |
| 858 | public void testReadLockInterruptibly(boolean fair) { |
| 859 | final PublicReentrantReadWriteLock lock = |
| 860 | new PublicReentrantReadWriteLock(fair); |
| 861 | try { |
| 862 | lock.readLock().lockInterruptibly(); |
| 863 | lock.readLock().unlock(); |
| 864 | lock.writeLock().lockInterruptibly(); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 865 | } catch (InterruptedException fail) { threadUnexpectedException(fail); } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 866 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 867 | public void realRun() throws InterruptedException { |
| 868 | lock.readLock().lockInterruptibly(); |
| 869 | }}); |
| 870 | |
| 871 | waitForQueuedThread(lock, t); |
| 872 | t.interrupt(); |
| 873 | awaitTermination(t); |
| 874 | releaseWriteLock(lock); |
| 875 | } |
| 876 | |
| 877 | /** |
| 878 | * Calling await without holding lock throws IllegalMonitorStateException |
| 879 | */ |
| 880 | public void testAwait_IMSE() { testAwait_IMSE(false); } |
| 881 | public void testAwait_IMSE_fair() { testAwait_IMSE(true); } |
| 882 | public void testAwait_IMSE(boolean fair) { |
| 883 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 884 | final Condition c = lock.writeLock().newCondition(); |
| 885 | for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
| 886 | long startTime = System.nanoTime(); |
| 887 | try { |
| 888 | await(c, awaitMethod); |
| 889 | shouldThrow(); |
| 890 | } catch (IllegalMonitorStateException success) { |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 891 | } catch (InterruptedException fail) { |
| 892 | threadUnexpectedException(fail); |
| 893 | } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 894 | assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
| 895 | } |
| 896 | } |
| 897 | |
| 898 | /** |
| 899 | * Calling signal without holding lock throws IllegalMonitorStateException |
| 900 | */ |
| 901 | public void testSignal_IMSE() { testSignal_IMSE(false); } |
| 902 | public void testSignal_IMSE_fair() { testSignal_IMSE(true); } |
| 903 | public void testSignal_IMSE(boolean fair) { |
| 904 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 905 | final Condition c = lock.writeLock().newCondition(); |
| 906 | try { |
| 907 | c.signal(); |
| 908 | shouldThrow(); |
| 909 | } catch (IllegalMonitorStateException success) {} |
| 910 | } |
| 911 | |
| 912 | /** |
| 913 | * Calling signalAll without holding lock throws IllegalMonitorStateException |
| 914 | */ |
| 915 | public void testSignalAll_IMSE() { testSignalAll_IMSE(false); } |
| 916 | public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); } |
| 917 | public void testSignalAll_IMSE(boolean fair) { |
| 918 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 919 | final Condition c = lock.writeLock().newCondition(); |
| 920 | try { |
| 921 | c.signalAll(); |
| 922 | shouldThrow(); |
| 923 | } catch (IllegalMonitorStateException success) {} |
| 924 | } |
| 925 | |
| 926 | /** |
| 927 | * awaitNanos without a signal times out |
| 928 | */ |
| 929 | public void testAwaitNanos_Timeout() { testAwaitNanos_Timeout(false); } |
| 930 | public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); } |
| 931 | public void testAwaitNanos_Timeout(boolean fair) { |
| 932 | try { |
| 933 | final ReentrantReadWriteLock lock = |
| 934 | new ReentrantReadWriteLock(fair); |
| 935 | final Condition c = lock.writeLock().newCondition(); |
| 936 | lock.writeLock().lock(); |
| 937 | long startTime = System.nanoTime(); |
| 938 | long timeoutMillis = 10; |
| 939 | long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
| 940 | long nanosRemaining = c.awaitNanos(timeoutNanos); |
| 941 | assertTrue(nanosRemaining <= 0); |
| 942 | assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
| 943 | lock.writeLock().unlock(); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 944 | } catch (InterruptedException fail) { threadUnexpectedException(fail); } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 945 | } |
| 946 | |
| 947 | /** |
| 948 | * timed await without a signal times out |
| 949 | */ |
| 950 | public void testAwait_Timeout() { testAwait_Timeout(false); } |
| 951 | public void testAwait_Timeout_fair() { testAwait_Timeout(true); } |
| 952 | public void testAwait_Timeout(boolean fair) { |
| 953 | try { |
| 954 | final ReentrantReadWriteLock lock = |
| 955 | new ReentrantReadWriteLock(fair); |
| 956 | final Condition c = lock.writeLock().newCondition(); |
| 957 | lock.writeLock().lock(); |
| 958 | long startTime = System.nanoTime(); |
| 959 | long timeoutMillis = 10; |
| 960 | assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
| 961 | assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
| 962 | lock.writeLock().unlock(); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 963 | } catch (InterruptedException fail) { threadUnexpectedException(fail); } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | /** |
| 967 | * awaitUntil without a signal times out |
| 968 | */ |
| 969 | public void testAwaitUntil_Timeout() { testAwaitUntil_Timeout(false); } |
| 970 | public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); } |
| 971 | public void testAwaitUntil_Timeout(boolean fair) { |
| 972 | try { |
| 973 | final ReentrantReadWriteLock lock = |
| 974 | new ReentrantReadWriteLock(fair); |
| 975 | final Condition c = lock.writeLock().newCondition(); |
| 976 | lock.writeLock().lock(); |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 977 | // We shouldn't assume that nanoTime and currentTimeMillis |
| 978 | // use the same time source, so don't use nanoTime here. |
| 979 | java.util.Date delayedDate = delayedDate(timeoutMillis()); |
| 980 | assertFalse(c.awaitUntil(delayedDate)); |
| 981 | assertTrue(new java.util.Date().getTime() >= delayedDate.getTime()); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 982 | lock.writeLock().unlock(); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 983 | } catch (InterruptedException fail) { threadUnexpectedException(fail); } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 984 | } |
| 985 | |
| 986 | /** |
| 987 | * await returns when signalled |
| 988 | */ |
| 989 | public void testAwait() { testAwait(false); } |
| 990 | public void testAwait_fair() { testAwait(true); } |
| 991 | public void testAwait(boolean fair) { |
| 992 | final PublicReentrantReadWriteLock lock = |
| 993 | new PublicReentrantReadWriteLock(fair); |
| 994 | final Condition c = lock.writeLock().newCondition(); |
| 995 | final CountDownLatch locked = new CountDownLatch(1); |
| 996 | Thread t = newStartedThread(new CheckedRunnable() { |
| 997 | public void realRun() throws InterruptedException { |
| 998 | lock.writeLock().lock(); |
| 999 | locked.countDown(); |
| 1000 | c.await(); |
| 1001 | lock.writeLock().unlock(); |
| 1002 | }}); |
| 1003 | |
| 1004 | await(locked); |
| 1005 | lock.writeLock().lock(); |
| 1006 | assertHasWaiters(lock, c, t); |
| 1007 | c.signal(); |
| 1008 | assertHasNoWaiters(lock, c); |
| 1009 | assertTrue(t.isAlive()); |
| 1010 | lock.writeLock().unlock(); |
| 1011 | awaitTermination(t); |
| 1012 | } |
| 1013 | |
| 1014 | /** |
| 1015 | * awaitUninterruptibly is uninterruptible |
| 1016 | */ |
| 1017 | public void testAwaitUninterruptibly() { testAwaitUninterruptibly(false); } |
| 1018 | public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); } |
| 1019 | public void testAwaitUninterruptibly(boolean fair) { |
| 1020 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1021 | final Condition c = lock.writeLock().newCondition(); |
| 1022 | final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
| 1023 | |
| 1024 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 1025 | public void realRun() { |
| 1026 | // Interrupt before awaitUninterruptibly |
| 1027 | lock.writeLock().lock(); |
| 1028 | pleaseInterrupt.countDown(); |
| 1029 | Thread.currentThread().interrupt(); |
| 1030 | c.awaitUninterruptibly(); |
| 1031 | assertTrue(Thread.interrupted()); |
| 1032 | lock.writeLock().unlock(); |
| 1033 | }}); |
| 1034 | |
| 1035 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 1036 | public void realRun() { |
| 1037 | // Interrupt during awaitUninterruptibly |
| 1038 | lock.writeLock().lock(); |
| 1039 | pleaseInterrupt.countDown(); |
| 1040 | c.awaitUninterruptibly(); |
| 1041 | assertTrue(Thread.interrupted()); |
| 1042 | lock.writeLock().unlock(); |
| 1043 | }}); |
| 1044 | |
| 1045 | await(pleaseInterrupt); |
| 1046 | lock.writeLock().lock(); |
| 1047 | lock.writeLock().unlock(); |
| 1048 | t2.interrupt(); |
| 1049 | |
| 1050 | assertThreadStaysAlive(t1); |
| 1051 | assertTrue(t2.isAlive()); |
| 1052 | |
| 1053 | lock.writeLock().lock(); |
| 1054 | c.signalAll(); |
| 1055 | lock.writeLock().unlock(); |
| 1056 | |
| 1057 | awaitTermination(t1); |
| 1058 | awaitTermination(t2); |
| 1059 | } |
| 1060 | |
| 1061 | /** |
| 1062 | * await/awaitNanos/awaitUntil is interruptible |
| 1063 | */ |
| 1064 | public void testInterruptible_await() { testInterruptible(false, AwaitMethod.await); } |
| 1065 | public void testInterruptible_await_fair() { testInterruptible(true, AwaitMethod.await); } |
| 1066 | public void testInterruptible_awaitTimed() { testInterruptible(false, AwaitMethod.awaitTimed); } |
| 1067 | public void testInterruptible_awaitTimed_fair() { testInterruptible(true, AwaitMethod.awaitTimed); } |
| 1068 | public void testInterruptible_awaitNanos() { testInterruptible(false, AwaitMethod.awaitNanos); } |
| 1069 | public void testInterruptible_awaitNanos_fair() { testInterruptible(true, AwaitMethod.awaitNanos); } |
| 1070 | public void testInterruptible_awaitUntil() { testInterruptible(false, AwaitMethod.awaitUntil); } |
| 1071 | public void testInterruptible_awaitUntil_fair() { testInterruptible(true, AwaitMethod.awaitUntil); } |
| 1072 | public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) { |
| 1073 | final PublicReentrantReadWriteLock lock = |
| 1074 | new PublicReentrantReadWriteLock(fair); |
| 1075 | final Condition c = lock.writeLock().newCondition(); |
| 1076 | final CountDownLatch locked = new CountDownLatch(1); |
| 1077 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 1078 | public void realRun() throws InterruptedException { |
| 1079 | lock.writeLock().lock(); |
| 1080 | assertWriteLockedByMoi(lock); |
| 1081 | assertHasNoWaiters(lock, c); |
| 1082 | locked.countDown(); |
| 1083 | try { |
| 1084 | await(c, awaitMethod); |
| 1085 | } finally { |
| 1086 | assertWriteLockedByMoi(lock); |
| 1087 | assertHasNoWaiters(lock, c); |
| 1088 | lock.writeLock().unlock(); |
| 1089 | assertFalse(Thread.interrupted()); |
| 1090 | } |
| 1091 | }}); |
| 1092 | |
| 1093 | await(locked); |
| 1094 | assertHasWaiters(lock, c, t); |
| 1095 | t.interrupt(); |
| 1096 | awaitTermination(t); |
| 1097 | assertNotWriteLocked(lock); |
| 1098 | } |
| 1099 | |
| 1100 | /** |
| 1101 | * signalAll wakes up all threads |
| 1102 | */ |
| 1103 | public void testSignalAll_await() { testSignalAll(false, AwaitMethod.await); } |
| 1104 | public void testSignalAll_await_fair() { testSignalAll(true, AwaitMethod.await); } |
| 1105 | public void testSignalAll_awaitTimed() { testSignalAll(false, AwaitMethod.awaitTimed); } |
| 1106 | public void testSignalAll_awaitTimed_fair() { testSignalAll(true, AwaitMethod.awaitTimed); } |
| 1107 | public void testSignalAll_awaitNanos() { testSignalAll(false, AwaitMethod.awaitNanos); } |
| 1108 | public void testSignalAll_awaitNanos_fair() { testSignalAll(true, AwaitMethod.awaitNanos); } |
| 1109 | public void testSignalAll_awaitUntil() { testSignalAll(false, AwaitMethod.awaitUntil); } |
| 1110 | public void testSignalAll_awaitUntil_fair() { testSignalAll(true, AwaitMethod.awaitUntil); } |
| 1111 | public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) { |
| 1112 | final PublicReentrantReadWriteLock lock = |
| 1113 | new PublicReentrantReadWriteLock(fair); |
| 1114 | final Condition c = lock.writeLock().newCondition(); |
| 1115 | final CountDownLatch locked = new CountDownLatch(2); |
| 1116 | final Lock writeLock = lock.writeLock(); |
| 1117 | class Awaiter extends CheckedRunnable { |
| 1118 | public void realRun() throws InterruptedException { |
| 1119 | writeLock.lock(); |
| 1120 | locked.countDown(); |
| 1121 | await(c, awaitMethod); |
| 1122 | writeLock.unlock(); |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | Thread t1 = newStartedThread(new Awaiter()); |
| 1127 | Thread t2 = newStartedThread(new Awaiter()); |
| 1128 | |
| 1129 | await(locked); |
| 1130 | writeLock.lock(); |
| 1131 | assertHasWaiters(lock, c, t1, t2); |
| 1132 | c.signalAll(); |
| 1133 | assertHasNoWaiters(lock, c); |
| 1134 | writeLock.unlock(); |
| 1135 | awaitTermination(t1); |
| 1136 | awaitTermination(t2); |
| 1137 | } |
| 1138 | |
| 1139 | /** |
| 1140 | * signal wakes up waiting threads in FIFO order |
| 1141 | */ |
| 1142 | public void testSignalWakesFifo() { testSignalWakesFifo(false); } |
| 1143 | public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); } |
| 1144 | public void testSignalWakesFifo(boolean fair) { |
| 1145 | final PublicReentrantReadWriteLock lock = |
| 1146 | new PublicReentrantReadWriteLock(fair); |
| 1147 | final Condition c = lock.writeLock().newCondition(); |
| 1148 | final CountDownLatch locked1 = new CountDownLatch(1); |
| 1149 | final CountDownLatch locked2 = new CountDownLatch(1); |
| 1150 | final Lock writeLock = lock.writeLock(); |
| 1151 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 1152 | public void realRun() throws InterruptedException { |
| 1153 | writeLock.lock(); |
| 1154 | locked1.countDown(); |
| 1155 | c.await(); |
| 1156 | writeLock.unlock(); |
| 1157 | }}); |
| 1158 | |
| 1159 | await(locked1); |
| 1160 | |
| 1161 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 1162 | public void realRun() throws InterruptedException { |
| 1163 | writeLock.lock(); |
| 1164 | locked2.countDown(); |
| 1165 | c.await(); |
| 1166 | writeLock.unlock(); |
| 1167 | }}); |
| 1168 | |
| 1169 | await(locked2); |
| 1170 | |
| 1171 | writeLock.lock(); |
| 1172 | assertHasWaiters(lock, c, t1, t2); |
| 1173 | assertFalse(lock.hasQueuedThreads()); |
| 1174 | c.signal(); |
| 1175 | assertHasWaiters(lock, c, t2); |
| 1176 | assertTrue(lock.hasQueuedThread(t1)); |
| 1177 | assertFalse(lock.hasQueuedThread(t2)); |
| 1178 | c.signal(); |
| 1179 | assertHasNoWaiters(lock, c); |
| 1180 | assertTrue(lock.hasQueuedThread(t1)); |
| 1181 | assertTrue(lock.hasQueuedThread(t2)); |
| 1182 | writeLock.unlock(); |
| 1183 | awaitTermination(t1); |
| 1184 | awaitTermination(t2); |
| 1185 | } |
| 1186 | |
| 1187 | /** |
| 1188 | * await after multiple reentrant locking preserves lock count |
| 1189 | */ |
| 1190 | public void testAwaitLockCount() { testAwaitLockCount(false); } |
| 1191 | public void testAwaitLockCount_fair() { testAwaitLockCount(true); } |
| 1192 | public void testAwaitLockCount(boolean fair) { |
| 1193 | final PublicReentrantReadWriteLock lock = |
| 1194 | new PublicReentrantReadWriteLock(fair); |
| 1195 | final Condition c = lock.writeLock().newCondition(); |
| 1196 | final CountDownLatch locked = new CountDownLatch(2); |
| 1197 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 1198 | public void realRun() throws InterruptedException { |
| 1199 | lock.writeLock().lock(); |
| 1200 | assertWriteLockedByMoi(lock); |
| 1201 | assertEquals(1, lock.writeLock().getHoldCount()); |
| 1202 | locked.countDown(); |
| 1203 | c.await(); |
| 1204 | assertWriteLockedByMoi(lock); |
| 1205 | assertEquals(1, lock.writeLock().getHoldCount()); |
| 1206 | lock.writeLock().unlock(); |
| 1207 | }}); |
| 1208 | |
| 1209 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 1210 | public void realRun() throws InterruptedException { |
| 1211 | lock.writeLock().lock(); |
| 1212 | lock.writeLock().lock(); |
| 1213 | assertWriteLockedByMoi(lock); |
| 1214 | assertEquals(2, lock.writeLock().getHoldCount()); |
| 1215 | locked.countDown(); |
| 1216 | c.await(); |
| 1217 | assertWriteLockedByMoi(lock); |
| 1218 | assertEquals(2, lock.writeLock().getHoldCount()); |
| 1219 | lock.writeLock().unlock(); |
| 1220 | lock.writeLock().unlock(); |
| 1221 | }}); |
| 1222 | |
| 1223 | await(locked); |
| 1224 | lock.writeLock().lock(); |
| 1225 | assertHasWaiters(lock, c, t1, t2); |
| 1226 | c.signalAll(); |
| 1227 | assertHasNoWaiters(lock, c); |
| 1228 | lock.writeLock().unlock(); |
| 1229 | awaitTermination(t1); |
| 1230 | awaitTermination(t2); |
| 1231 | } |
| 1232 | |
| 1233 | /** |
| 1234 | * A serialized lock deserializes as unlocked |
| 1235 | */ |
| 1236 | public void testSerialization() { testSerialization(false); } |
| 1237 | public void testSerialization_fair() { testSerialization(true); } |
| 1238 | public void testSerialization(boolean fair) { |
| 1239 | ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1240 | lock.writeLock().lock(); |
| 1241 | lock.readLock().lock(); |
| 1242 | |
| 1243 | ReentrantReadWriteLock clone = serialClone(lock); |
| 1244 | assertEquals(lock.isFair(), clone.isFair()); |
| 1245 | assertTrue(lock.isWriteLocked()); |
| 1246 | assertFalse(clone.isWriteLocked()); |
| 1247 | assertEquals(1, lock.getReadLockCount()); |
| 1248 | assertEquals(0, clone.getReadLockCount()); |
| 1249 | clone.writeLock().lock(); |
| 1250 | clone.readLock().lock(); |
| 1251 | assertTrue(clone.isWriteLocked()); |
| 1252 | assertEquals(1, clone.getReadLockCount()); |
| 1253 | clone.readLock().unlock(); |
| 1254 | clone.writeLock().unlock(); |
| 1255 | assertFalse(clone.isWriteLocked()); |
| 1256 | assertEquals(1, lock.getReadLockCount()); |
| 1257 | assertEquals(0, clone.getReadLockCount()); |
| 1258 | } |
| 1259 | |
| 1260 | /** |
| 1261 | * hasQueuedThreads reports whether there are waiting threads |
| 1262 | */ |
| 1263 | public void testHasQueuedThreads() { testHasQueuedThreads(false); } |
| 1264 | public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); } |
| 1265 | public void testHasQueuedThreads(boolean fair) { |
| 1266 | final PublicReentrantReadWriteLock lock = |
| 1267 | new PublicReentrantReadWriteLock(fair); |
| 1268 | Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
| 1269 | Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
| 1270 | assertFalse(lock.hasQueuedThreads()); |
| 1271 | lock.writeLock().lock(); |
| 1272 | assertFalse(lock.hasQueuedThreads()); |
| 1273 | t1.start(); |
| 1274 | waitForQueuedThread(lock, t1); |
| 1275 | assertTrue(lock.hasQueuedThreads()); |
| 1276 | t2.start(); |
| 1277 | waitForQueuedThread(lock, t2); |
| 1278 | assertTrue(lock.hasQueuedThreads()); |
| 1279 | t1.interrupt(); |
| 1280 | awaitTermination(t1); |
| 1281 | assertTrue(lock.hasQueuedThreads()); |
| 1282 | lock.writeLock().unlock(); |
| 1283 | awaitTermination(t2); |
| 1284 | assertFalse(lock.hasQueuedThreads()); |
| 1285 | } |
| 1286 | |
| 1287 | /** |
| 1288 | * hasQueuedThread(null) throws NPE |
| 1289 | */ |
| 1290 | public void testHasQueuedThreadNPE() { testHasQueuedThreadNPE(false); } |
| 1291 | public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); } |
| 1292 | public void testHasQueuedThreadNPE(boolean fair) { |
| 1293 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1294 | try { |
| 1295 | lock.hasQueuedThread(null); |
| 1296 | shouldThrow(); |
| 1297 | } catch (NullPointerException success) {} |
| 1298 | } |
| 1299 | |
| 1300 | /** |
| 1301 | * hasQueuedThread reports whether a thread is queued |
| 1302 | */ |
| 1303 | public void testHasQueuedThread() { testHasQueuedThread(false); } |
| 1304 | public void testHasQueuedThread_fair() { testHasQueuedThread(true); } |
| 1305 | public void testHasQueuedThread(boolean fair) { |
| 1306 | final PublicReentrantReadWriteLock lock = |
| 1307 | new PublicReentrantReadWriteLock(fair); |
| 1308 | Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
| 1309 | Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
| 1310 | assertFalse(lock.hasQueuedThread(t1)); |
| 1311 | assertFalse(lock.hasQueuedThread(t2)); |
| 1312 | lock.writeLock().lock(); |
| 1313 | t1.start(); |
| 1314 | waitForQueuedThread(lock, t1); |
| 1315 | assertTrue(lock.hasQueuedThread(t1)); |
| 1316 | assertFalse(lock.hasQueuedThread(t2)); |
| 1317 | t2.start(); |
| 1318 | waitForQueuedThread(lock, t2); |
| 1319 | assertTrue(lock.hasQueuedThread(t1)); |
| 1320 | assertTrue(lock.hasQueuedThread(t2)); |
| 1321 | t1.interrupt(); |
| 1322 | awaitTermination(t1); |
| 1323 | assertFalse(lock.hasQueuedThread(t1)); |
| 1324 | assertTrue(lock.hasQueuedThread(t2)); |
| 1325 | lock.writeLock().unlock(); |
| 1326 | awaitTermination(t2); |
| 1327 | assertFalse(lock.hasQueuedThread(t1)); |
| 1328 | assertFalse(lock.hasQueuedThread(t2)); |
| 1329 | } |
| 1330 | |
| 1331 | /** |
| 1332 | * getQueueLength reports number of waiting threads |
| 1333 | */ |
| 1334 | public void testGetQueueLength() { testGetQueueLength(false); } |
| 1335 | public void testGetQueueLength_fair() { testGetQueueLength(true); } |
| 1336 | public void testGetQueueLength(boolean fair) { |
| 1337 | final PublicReentrantReadWriteLock lock = |
| 1338 | new PublicReentrantReadWriteLock(fair); |
| 1339 | Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
| 1340 | Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
| 1341 | assertEquals(0, lock.getQueueLength()); |
| 1342 | lock.writeLock().lock(); |
| 1343 | t1.start(); |
| 1344 | waitForQueuedThread(lock, t1); |
| 1345 | assertEquals(1, lock.getQueueLength()); |
| 1346 | t2.start(); |
| 1347 | waitForQueuedThread(lock, t2); |
| 1348 | assertEquals(2, lock.getQueueLength()); |
| 1349 | t1.interrupt(); |
| 1350 | awaitTermination(t1); |
| 1351 | assertEquals(1, lock.getQueueLength()); |
| 1352 | lock.writeLock().unlock(); |
| 1353 | awaitTermination(t2); |
| 1354 | assertEquals(0, lock.getQueueLength()); |
| 1355 | } |
| 1356 | |
| 1357 | /** |
| 1358 | * getQueuedThreads includes waiting threads |
| 1359 | */ |
| 1360 | public void testGetQueuedThreads() { testGetQueuedThreads(false); } |
| 1361 | public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); } |
| 1362 | public void testGetQueuedThreads(boolean fair) { |
| 1363 | final PublicReentrantReadWriteLock lock = |
| 1364 | new PublicReentrantReadWriteLock(fair); |
| 1365 | Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
| 1366 | Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
| 1367 | assertTrue(lock.getQueuedThreads().isEmpty()); |
| 1368 | lock.writeLock().lock(); |
| 1369 | assertTrue(lock.getQueuedThreads().isEmpty()); |
| 1370 | t1.start(); |
| 1371 | waitForQueuedThread(lock, t1); |
| 1372 | assertEquals(1, lock.getQueuedThreads().size()); |
| 1373 | assertTrue(lock.getQueuedThreads().contains(t1)); |
| 1374 | t2.start(); |
| 1375 | waitForQueuedThread(lock, t2); |
| 1376 | assertEquals(2, lock.getQueuedThreads().size()); |
| 1377 | assertTrue(lock.getQueuedThreads().contains(t1)); |
| 1378 | assertTrue(lock.getQueuedThreads().contains(t2)); |
| 1379 | t1.interrupt(); |
| 1380 | awaitTermination(t1); |
| 1381 | assertFalse(lock.getQueuedThreads().contains(t1)); |
| 1382 | assertTrue(lock.getQueuedThreads().contains(t2)); |
| 1383 | assertEquals(1, lock.getQueuedThreads().size()); |
| 1384 | lock.writeLock().unlock(); |
| 1385 | awaitTermination(t2); |
| 1386 | assertTrue(lock.getQueuedThreads().isEmpty()); |
| 1387 | } |
| 1388 | |
| 1389 | /** |
| 1390 | * hasWaiters throws NPE if null |
| 1391 | */ |
| 1392 | public void testHasWaitersNPE() { testHasWaitersNPE(false); } |
| 1393 | public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); } |
| 1394 | public void testHasWaitersNPE(boolean fair) { |
| 1395 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1396 | try { |
| 1397 | lock.hasWaiters(null); |
| 1398 | shouldThrow(); |
| 1399 | } catch (NullPointerException success) {} |
| 1400 | } |
| 1401 | |
| 1402 | /** |
| 1403 | * getWaitQueueLength throws NPE if null |
| 1404 | */ |
| 1405 | public void testGetWaitQueueLengthNPE() { testGetWaitQueueLengthNPE(false); } |
| 1406 | public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); } |
| 1407 | public void testGetWaitQueueLengthNPE(boolean fair) { |
| 1408 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1409 | try { |
| 1410 | lock.getWaitQueueLength(null); |
| 1411 | shouldThrow(); |
| 1412 | } catch (NullPointerException success) {} |
| 1413 | } |
| 1414 | |
| 1415 | /** |
| 1416 | * getWaitingThreads throws NPE if null |
| 1417 | */ |
| 1418 | public void testGetWaitingThreadsNPE() { testGetWaitingThreadsNPE(false); } |
| 1419 | public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); } |
| 1420 | public void testGetWaitingThreadsNPE(boolean fair) { |
| 1421 | final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair); |
| 1422 | try { |
| 1423 | lock.getWaitingThreads(null); |
| 1424 | shouldThrow(); |
| 1425 | } catch (NullPointerException success) {} |
| 1426 | } |
| 1427 | |
| 1428 | /** |
| 1429 | * hasWaiters throws IllegalArgumentException if not owned |
| 1430 | */ |
| 1431 | public void testHasWaitersIAE() { testHasWaitersIAE(false); } |
| 1432 | public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); } |
| 1433 | public void testHasWaitersIAE(boolean fair) { |
| 1434 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1435 | final Condition c = lock.writeLock().newCondition(); |
| 1436 | final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair); |
| 1437 | try { |
| 1438 | lock2.hasWaiters(c); |
| 1439 | shouldThrow(); |
| 1440 | } catch (IllegalArgumentException success) {} |
| 1441 | } |
| 1442 | |
| 1443 | /** |
| 1444 | * hasWaiters throws IllegalMonitorStateException if not locked |
| 1445 | */ |
| 1446 | public void testHasWaitersIMSE() { testHasWaitersIMSE(false); } |
| 1447 | public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); } |
| 1448 | public void testHasWaitersIMSE(boolean fair) { |
| 1449 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1450 | final Condition c = lock.writeLock().newCondition(); |
| 1451 | try { |
| 1452 | lock.hasWaiters(c); |
| 1453 | shouldThrow(); |
| 1454 | } catch (IllegalMonitorStateException success) {} |
| 1455 | } |
| 1456 | |
| 1457 | /** |
| 1458 | * getWaitQueueLength throws IllegalArgumentException if not owned |
| 1459 | */ |
| 1460 | public void testGetWaitQueueLengthIAE() { testGetWaitQueueLengthIAE(false); } |
| 1461 | public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); } |
| 1462 | public void testGetWaitQueueLengthIAE(boolean fair) { |
| 1463 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1464 | final Condition c = lock.writeLock().newCondition(); |
| 1465 | final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair); |
| 1466 | try { |
| 1467 | lock2.getWaitQueueLength(c); |
| 1468 | shouldThrow(); |
| 1469 | } catch (IllegalArgumentException success) {} |
| 1470 | } |
| 1471 | |
| 1472 | /** |
| 1473 | * getWaitQueueLength throws IllegalMonitorStateException if not locked |
| 1474 | */ |
| 1475 | public void testGetWaitQueueLengthIMSE() { testGetWaitQueueLengthIMSE(false); } |
| 1476 | public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); } |
| 1477 | public void testGetWaitQueueLengthIMSE(boolean fair) { |
| 1478 | final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1479 | final Condition c = lock.writeLock().newCondition(); |
| 1480 | try { |
| 1481 | lock.getWaitQueueLength(c); |
| 1482 | shouldThrow(); |
| 1483 | } catch (IllegalMonitorStateException success) {} |
| 1484 | } |
| 1485 | |
| 1486 | /** |
| 1487 | * getWaitingThreads throws IllegalArgumentException if not owned |
| 1488 | */ |
| 1489 | public void testGetWaitingThreadsIAE() { testGetWaitingThreadsIAE(false); } |
| 1490 | public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); } |
| 1491 | public void testGetWaitingThreadsIAE(boolean fair) { |
| 1492 | final PublicReentrantReadWriteLock lock = |
| 1493 | new PublicReentrantReadWriteLock(fair); |
| 1494 | final Condition c = lock.writeLock().newCondition(); |
| 1495 | final PublicReentrantReadWriteLock lock2 = |
| 1496 | new PublicReentrantReadWriteLock(fair); |
| 1497 | try { |
| 1498 | lock2.getWaitingThreads(c); |
| 1499 | shouldThrow(); |
| 1500 | } catch (IllegalArgumentException success) {} |
| 1501 | } |
| 1502 | |
| 1503 | /** |
| 1504 | * getWaitingThreads throws IllegalMonitorStateException if not locked |
| 1505 | */ |
| 1506 | public void testGetWaitingThreadsIMSE() { testGetWaitingThreadsIMSE(false); } |
| 1507 | public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); } |
| 1508 | public void testGetWaitingThreadsIMSE(boolean fair) { |
| 1509 | final PublicReentrantReadWriteLock lock = |
| 1510 | new PublicReentrantReadWriteLock(fair); |
| 1511 | final Condition c = lock.writeLock().newCondition(); |
| 1512 | try { |
| 1513 | lock.getWaitingThreads(c); |
| 1514 | shouldThrow(); |
| 1515 | } catch (IllegalMonitorStateException success) {} |
| 1516 | } |
| 1517 | |
| 1518 | /** |
| 1519 | * hasWaiters returns true when a thread is waiting, else false |
| 1520 | */ |
| 1521 | public void testHasWaiters() { testHasWaiters(false); } |
| 1522 | public void testHasWaiters_fair() { testHasWaiters(true); } |
| 1523 | public void testHasWaiters(boolean fair) { |
| 1524 | final PublicReentrantReadWriteLock lock = |
| 1525 | new PublicReentrantReadWriteLock(fair); |
| 1526 | final Condition c = lock.writeLock().newCondition(); |
| 1527 | final CountDownLatch locked = new CountDownLatch(1); |
| 1528 | Thread t = newStartedThread(new CheckedRunnable() { |
| 1529 | public void realRun() throws InterruptedException { |
| 1530 | lock.writeLock().lock(); |
| 1531 | assertHasNoWaiters(lock, c); |
| 1532 | assertFalse(lock.hasWaiters(c)); |
| 1533 | locked.countDown(); |
| 1534 | c.await(); |
| 1535 | assertHasNoWaiters(lock, c); |
| 1536 | assertFalse(lock.hasWaiters(c)); |
| 1537 | lock.writeLock().unlock(); |
| 1538 | }}); |
| 1539 | |
| 1540 | await(locked); |
| 1541 | lock.writeLock().lock(); |
| 1542 | assertHasWaiters(lock, c, t); |
| 1543 | assertTrue(lock.hasWaiters(c)); |
| 1544 | c.signal(); |
| 1545 | assertHasNoWaiters(lock, c); |
| 1546 | assertFalse(lock.hasWaiters(c)); |
| 1547 | lock.writeLock().unlock(); |
| 1548 | awaitTermination(t); |
| 1549 | assertHasNoWaiters(lock, c); |
| 1550 | } |
| 1551 | |
| 1552 | /** |
| 1553 | * getWaitQueueLength returns number of waiting threads |
| 1554 | */ |
| 1555 | public void testGetWaitQueueLength() { testGetWaitQueueLength(false); } |
| 1556 | public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); } |
| 1557 | public void testGetWaitQueueLength(boolean fair) { |
| 1558 | final PublicReentrantReadWriteLock lock = |
| 1559 | new PublicReentrantReadWriteLock(fair); |
| 1560 | final Condition c = lock.writeLock().newCondition(); |
| 1561 | final CountDownLatch locked = new CountDownLatch(1); |
| 1562 | Thread t = newStartedThread(new CheckedRunnable() { |
| 1563 | public void realRun() throws InterruptedException { |
| 1564 | lock.writeLock().lock(); |
| 1565 | assertEquals(0, lock.getWaitQueueLength(c)); |
| 1566 | locked.countDown(); |
| 1567 | c.await(); |
| 1568 | lock.writeLock().unlock(); |
| 1569 | }}); |
| 1570 | |
| 1571 | await(locked); |
| 1572 | lock.writeLock().lock(); |
| 1573 | assertHasWaiters(lock, c, t); |
| 1574 | assertEquals(1, lock.getWaitQueueLength(c)); |
| 1575 | c.signal(); |
| 1576 | assertHasNoWaiters(lock, c); |
| 1577 | assertEquals(0, lock.getWaitQueueLength(c)); |
| 1578 | lock.writeLock().unlock(); |
| 1579 | awaitTermination(t); |
| 1580 | } |
| 1581 | |
| 1582 | /** |
| 1583 | * getWaitingThreads returns only and all waiting threads |
| 1584 | */ |
| 1585 | public void testGetWaitingThreads() { testGetWaitingThreads(false); } |
| 1586 | public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); } |
| 1587 | public void testGetWaitingThreads(boolean fair) { |
| 1588 | final PublicReentrantReadWriteLock lock = |
| 1589 | new PublicReentrantReadWriteLock(fair); |
| 1590 | final Condition c = lock.writeLock().newCondition(); |
| 1591 | final CountDownLatch locked1 = new CountDownLatch(1); |
| 1592 | final CountDownLatch locked2 = new CountDownLatch(1); |
| 1593 | Thread t1 = new Thread(new CheckedRunnable() { |
| 1594 | public void realRun() throws InterruptedException { |
| 1595 | lock.writeLock().lock(); |
| 1596 | assertTrue(lock.getWaitingThreads(c).isEmpty()); |
| 1597 | locked1.countDown(); |
| 1598 | c.await(); |
| 1599 | lock.writeLock().unlock(); |
| 1600 | }}); |
| 1601 | |
| 1602 | Thread t2 = new Thread(new CheckedRunnable() { |
| 1603 | public void realRun() throws InterruptedException { |
| 1604 | lock.writeLock().lock(); |
| 1605 | assertFalse(lock.getWaitingThreads(c).isEmpty()); |
| 1606 | locked2.countDown(); |
| 1607 | c.await(); |
| 1608 | lock.writeLock().unlock(); |
| 1609 | }}); |
| 1610 | |
| 1611 | lock.writeLock().lock(); |
| 1612 | assertTrue(lock.getWaitingThreads(c).isEmpty()); |
| 1613 | lock.writeLock().unlock(); |
| 1614 | |
| 1615 | t1.start(); |
| 1616 | await(locked1); |
| 1617 | t2.start(); |
| 1618 | await(locked2); |
| 1619 | |
| 1620 | lock.writeLock().lock(); |
| 1621 | assertTrue(lock.hasWaiters(c)); |
| 1622 | assertTrue(lock.getWaitingThreads(c).contains(t1)); |
| 1623 | assertTrue(lock.getWaitingThreads(c).contains(t2)); |
| 1624 | assertEquals(2, lock.getWaitingThreads(c).size()); |
| 1625 | c.signalAll(); |
| 1626 | assertHasNoWaiters(lock, c); |
| 1627 | lock.writeLock().unlock(); |
| 1628 | |
| 1629 | awaitTermination(t1); |
| 1630 | awaitTermination(t2); |
| 1631 | |
| 1632 | assertHasNoWaiters(lock, c); |
| 1633 | } |
| 1634 | |
| 1635 | /** |
| 1636 | * toString indicates current lock state |
| 1637 | */ |
| 1638 | public void testToString() { testToString(false); } |
| 1639 | public void testToString_fair() { testToString(true); } |
| 1640 | public void testToString(boolean fair) { |
| 1641 | ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1642 | assertTrue(lock.toString().contains("Write locks = 0")); |
| 1643 | assertTrue(lock.toString().contains("Read locks = 0")); |
| 1644 | lock.writeLock().lock(); |
| 1645 | assertTrue(lock.toString().contains("Write locks = 1")); |
| 1646 | assertTrue(lock.toString().contains("Read locks = 0")); |
| 1647 | lock.writeLock().unlock(); |
| 1648 | lock.readLock().lock(); |
| 1649 | lock.readLock().lock(); |
| 1650 | assertTrue(lock.toString().contains("Write locks = 0")); |
| 1651 | assertTrue(lock.toString().contains("Read locks = 2")); |
| 1652 | } |
| 1653 | |
| 1654 | /** |
| 1655 | * readLock.toString indicates current lock state |
| 1656 | */ |
| 1657 | public void testReadLockToString() { testReadLockToString(false); } |
| 1658 | public void testReadLockToString_fair() { testReadLockToString(true); } |
| 1659 | public void testReadLockToString(boolean fair) { |
| 1660 | ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1661 | assertTrue(lock.readLock().toString().contains("Read locks = 0")); |
| 1662 | lock.readLock().lock(); |
| 1663 | lock.readLock().lock(); |
| 1664 | assertTrue(lock.readLock().toString().contains("Read locks = 2")); |
| 1665 | } |
| 1666 | |
| 1667 | /** |
| 1668 | * writeLock.toString indicates current lock state |
| 1669 | */ |
| 1670 | public void testWriteLockToString() { testWriteLockToString(false); } |
| 1671 | public void testWriteLockToString_fair() { testWriteLockToString(true); } |
| 1672 | public void testWriteLockToString(boolean fair) { |
| 1673 | ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair); |
| 1674 | assertTrue(lock.writeLock().toString().contains("Unlocked")); |
| 1675 | lock.writeLock().lock(); |
| 1676 | assertTrue(lock.writeLock().toString().contains("Locked")); |
| 1677 | lock.writeLock().unlock(); |
| 1678 | assertTrue(lock.writeLock().toString().contains("Unlocked")); |
| 1679 | } |
| 1680 | |
| 1681 | } |