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