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.*; |
| 13 | import static java.util.concurrent.TimeUnit.MILLISECONDS; |
| 14 | import java.util.concurrent.locks.AbstractQueuedLongSynchronizer; |
| 15 | import java.util.concurrent.locks.AbstractQueuedLongSynchronizer.ConditionObject; |
| 16 | |
| 17 | public class AbstractQueuedLongSynchronizerTest extends JSR166TestCase { |
| 18 | |
| 19 | /** |
| 20 | * A simple mutex class, adapted from the class javadoc. Exclusive |
| 21 | * acquire tests exercise this as a sample user extension. |
| 22 | */ |
| 23 | static class Mutex extends AbstractQueuedLongSynchronizer { |
| 24 | /** An eccentric value > 32 bits for locked synchronizer state. */ |
| 25 | static final long LOCKED = (1L << 63) | (1L << 15); |
| 26 | |
| 27 | static final long UNLOCKED = 0; |
| 28 | |
| 29 | public boolean isHeldExclusively() { |
| 30 | long state = getState(); |
| 31 | assertTrue(state == UNLOCKED || state == LOCKED); |
| 32 | return state == LOCKED; |
| 33 | } |
| 34 | |
| 35 | public boolean tryAcquire(long acquires) { |
| 36 | assertEquals(LOCKED, acquires); |
| 37 | return compareAndSetState(UNLOCKED, LOCKED); |
| 38 | } |
| 39 | |
| 40 | public boolean tryRelease(long releases) { |
| 41 | if (getState() != LOCKED) throw new IllegalMonitorStateException(); |
| 42 | setState(UNLOCKED); |
| 43 | return true; |
| 44 | } |
| 45 | |
| 46 | public boolean tryAcquireNanos(long nanos) throws InterruptedException { |
| 47 | return tryAcquireNanos(LOCKED, nanos); |
| 48 | } |
| 49 | |
| 50 | public boolean tryAcquire() { |
| 51 | return tryAcquire(LOCKED); |
| 52 | } |
| 53 | |
| 54 | public boolean tryRelease() { |
| 55 | return tryRelease(LOCKED); |
| 56 | } |
| 57 | |
| 58 | public void acquire() { |
| 59 | acquire(LOCKED); |
| 60 | } |
| 61 | |
| 62 | public void acquireInterruptibly() throws InterruptedException { |
| 63 | acquireInterruptibly(LOCKED); |
| 64 | } |
| 65 | |
| 66 | public void release() { |
| 67 | release(LOCKED); |
| 68 | } |
| 69 | |
| 70 | public ConditionObject newCondition() { |
| 71 | return new ConditionObject(); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * A simple latch class, to test shared mode. |
| 77 | */ |
| 78 | static class BooleanLatch extends AbstractQueuedLongSynchronizer { |
| 79 | public boolean isSignalled() { return getState() != 0; } |
| 80 | |
| 81 | public long tryAcquireShared(long ignore) { |
| 82 | return isSignalled() ? 1 : -1; |
| 83 | } |
| 84 | |
| 85 | public boolean tryReleaseShared(long ignore) { |
| 86 | setState(1 << 62); |
| 87 | return true; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * A runnable calling acquireInterruptibly that does not expect to |
| 93 | * be interrupted. |
| 94 | */ |
| 95 | class InterruptibleSyncRunnable extends CheckedRunnable { |
| 96 | final Mutex sync; |
| 97 | InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; } |
| 98 | public void realRun() throws InterruptedException { |
| 99 | sync.acquireInterruptibly(); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * A runnable calling acquireInterruptibly that expects to be |
| 105 | * interrupted. |
| 106 | */ |
| 107 | class InterruptedSyncRunnable extends CheckedInterruptedRunnable { |
| 108 | final Mutex sync; |
| 109 | InterruptedSyncRunnable(Mutex sync) { this.sync = sync; } |
| 110 | public void realRun() throws InterruptedException { |
| 111 | sync.acquireInterruptibly(); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | /** A constant to clarify calls to checking methods below. */ |
| 116 | static final Thread[] NO_THREADS = new Thread[0]; |
| 117 | |
| 118 | /** |
| 119 | * Spin-waits until sync.isQueued(t) becomes true. |
| 120 | */ |
| 121 | void waitForQueuedThread(AbstractQueuedLongSynchronizer sync, |
| 122 | Thread t) { |
| 123 | long startTime = System.nanoTime(); |
| 124 | while (!sync.isQueued(t)) { |
| 125 | if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
| 126 | throw new AssertionFailedError("timed out"); |
| 127 | Thread.yield(); |
| 128 | } |
| 129 | assertTrue(t.isAlive()); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Checks that sync has exactly the given queued threads. |
| 134 | */ |
| 135 | void assertHasQueuedThreads(AbstractQueuedLongSynchronizer sync, |
| 136 | Thread... expected) { |
| 137 | Collection<Thread> actual = sync.getQueuedThreads(); |
| 138 | assertEquals(expected.length > 0, sync.hasQueuedThreads()); |
| 139 | assertEquals(expected.length, sync.getQueueLength()); |
| 140 | assertEquals(expected.length, actual.size()); |
| 141 | assertEquals(expected.length == 0, actual.isEmpty()); |
| 142 | assertEquals(new HashSet<Thread>(actual), |
| 143 | new HashSet<Thread>(Arrays.asList(expected))); |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Checks that sync has exactly the given (exclusive) queued threads. |
| 148 | */ |
| 149 | void assertHasExclusiveQueuedThreads(AbstractQueuedLongSynchronizer sync, |
| 150 | Thread... expected) { |
| 151 | assertHasQueuedThreads(sync, expected); |
| 152 | assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()), |
| 153 | new HashSet<Thread>(sync.getQueuedThreads())); |
| 154 | assertEquals(0, sync.getSharedQueuedThreads().size()); |
| 155 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * Checks that sync has exactly the given (shared) queued threads. |
| 160 | */ |
| 161 | void assertHasSharedQueuedThreads(AbstractQueuedLongSynchronizer sync, |
| 162 | Thread... expected) { |
| 163 | assertHasQueuedThreads(sync, expected); |
| 164 | assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()), |
| 165 | new HashSet<Thread>(sync.getQueuedThreads())); |
| 166 | assertEquals(0, sync.getExclusiveQueuedThreads().size()); |
| 167 | assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * Checks that condition c has exactly the given waiter threads, |
| 172 | * after acquiring mutex. |
| 173 | */ |
| 174 | void assertHasWaitersUnlocked(Mutex sync, ConditionObject c, |
| 175 | Thread... threads) { |
| 176 | sync.acquire(); |
| 177 | assertHasWaitersLocked(sync, c, threads); |
| 178 | sync.release(); |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Checks that condition c has exactly the given waiter threads. |
| 183 | */ |
| 184 | void assertHasWaitersLocked(Mutex sync, ConditionObject c, |
| 185 | Thread... threads) { |
| 186 | assertEquals(threads.length > 0, sync.hasWaiters(c)); |
| 187 | assertEquals(threads.length, sync.getWaitQueueLength(c)); |
| 188 | assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty()); |
| 189 | assertEquals(threads.length, sync.getWaitingThreads(c).size()); |
| 190 | assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)), |
| 191 | new HashSet<Thread>(Arrays.asList(threads))); |
| 192 | } |
| 193 | |
| 194 | enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }; |
| 195 | |
| 196 | /** |
| 197 | * Awaits condition using the specified AwaitMethod. |
| 198 | */ |
| 199 | void await(ConditionObject c, AwaitMethod awaitMethod) |
| 200 | throws InterruptedException { |
| 201 | long timeoutMillis = 2 * LONG_DELAY_MS; |
| 202 | switch (awaitMethod) { |
| 203 | case await: |
| 204 | c.await(); |
| 205 | break; |
| 206 | case awaitTimed: |
| 207 | assertTrue(c.await(timeoutMillis, MILLISECONDS)); |
| 208 | break; |
| 209 | case awaitNanos: |
| 210 | long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
| 211 | long nanosRemaining = c.awaitNanos(nanosTimeout); |
| 212 | assertTrue(nanosRemaining > 0); |
| 213 | break; |
| 214 | case awaitUntil: |
| 215 | assertTrue(c.awaitUntil(delayedDate(timeoutMillis))); |
| 216 | break; |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Checks that awaiting the given condition times out (using the |
| 222 | * default timeout duration). |
| 223 | */ |
| 224 | void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) { |
| 225 | long timeoutMillis = timeoutMillis(); |
| 226 | long startTime = System.nanoTime(); |
| 227 | try { |
| 228 | switch (awaitMethod) { |
| 229 | case awaitTimed: |
| 230 | assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
| 231 | break; |
| 232 | case awaitNanos: |
| 233 | long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
| 234 | long nanosRemaining = c.awaitNanos(nanosTimeout); |
| 235 | assertTrue(nanosRemaining <= 0); |
| 236 | break; |
| 237 | case awaitUntil: |
| 238 | assertFalse(c.awaitUntil(delayedDate(timeoutMillis))); |
| 239 | break; |
| 240 | default: |
| 241 | throw new UnsupportedOperationException(); |
| 242 | } |
| 243 | } catch (InterruptedException ie) { threadUnexpectedException(ie); } |
| 244 | assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * isHeldExclusively is false upon construction |
| 249 | */ |
| 250 | public void testIsHeldExclusively() { |
| 251 | Mutex sync = new Mutex(); |
| 252 | assertFalse(sync.isHeldExclusively()); |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * acquiring released sync succeeds |
| 257 | */ |
| 258 | public void testAcquire() { |
| 259 | Mutex sync = new Mutex(); |
| 260 | sync.acquire(); |
| 261 | assertTrue(sync.isHeldExclusively()); |
| 262 | sync.release(); |
| 263 | assertFalse(sync.isHeldExclusively()); |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * tryAcquire on a released sync succeeds |
| 268 | */ |
| 269 | public void testTryAcquire() { |
| 270 | Mutex sync = new Mutex(); |
| 271 | assertTrue(sync.tryAcquire()); |
| 272 | assertTrue(sync.isHeldExclusively()); |
| 273 | sync.release(); |
| 274 | assertFalse(sync.isHeldExclusively()); |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * hasQueuedThreads reports whether there are waiting threads |
| 279 | */ |
| 280 | public void testHasQueuedThreads() { |
| 281 | final Mutex sync = new Mutex(); |
| 282 | assertFalse(sync.hasQueuedThreads()); |
| 283 | sync.acquire(); |
| 284 | Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
| 285 | waitForQueuedThread(sync, t1); |
| 286 | assertTrue(sync.hasQueuedThreads()); |
| 287 | Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
| 288 | waitForQueuedThread(sync, t2); |
| 289 | assertTrue(sync.hasQueuedThreads()); |
| 290 | t1.interrupt(); |
| 291 | awaitTermination(t1); |
| 292 | assertTrue(sync.hasQueuedThreads()); |
| 293 | sync.release(); |
| 294 | awaitTermination(t2); |
| 295 | assertFalse(sync.hasQueuedThreads()); |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * isQueued(null) throws NullPointerException |
| 300 | */ |
| 301 | public void testIsQueuedNPE() { |
| 302 | final Mutex sync = new Mutex(); |
| 303 | try { |
| 304 | sync.isQueued(null); |
| 305 | shouldThrow(); |
| 306 | } catch (NullPointerException success) {} |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * isQueued reports whether a thread is queued |
| 311 | */ |
| 312 | public void testIsQueued() { |
| 313 | final Mutex sync = new Mutex(); |
| 314 | Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
| 315 | Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
| 316 | assertFalse(sync.isQueued(t1)); |
| 317 | assertFalse(sync.isQueued(t2)); |
| 318 | sync.acquire(); |
| 319 | t1.start(); |
| 320 | waitForQueuedThread(sync, t1); |
| 321 | assertTrue(sync.isQueued(t1)); |
| 322 | assertFalse(sync.isQueued(t2)); |
| 323 | t2.start(); |
| 324 | waitForQueuedThread(sync, t2); |
| 325 | assertTrue(sync.isQueued(t1)); |
| 326 | assertTrue(sync.isQueued(t2)); |
| 327 | t1.interrupt(); |
| 328 | awaitTermination(t1); |
| 329 | assertFalse(sync.isQueued(t1)); |
| 330 | assertTrue(sync.isQueued(t2)); |
| 331 | sync.release(); |
| 332 | awaitTermination(t2); |
| 333 | assertFalse(sync.isQueued(t1)); |
| 334 | assertFalse(sync.isQueued(t2)); |
| 335 | } |
| 336 | |
| 337 | /** |
| 338 | * getFirstQueuedThread returns first waiting thread or null if none |
| 339 | */ |
| 340 | public void testGetFirstQueuedThread() { |
| 341 | final Mutex sync = new Mutex(); |
| 342 | assertNull(sync.getFirstQueuedThread()); |
| 343 | sync.acquire(); |
| 344 | Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
| 345 | waitForQueuedThread(sync, t1); |
| 346 | assertEquals(t1, sync.getFirstQueuedThread()); |
| 347 | Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
| 348 | waitForQueuedThread(sync, t2); |
| 349 | assertEquals(t1, sync.getFirstQueuedThread()); |
| 350 | t1.interrupt(); |
| 351 | awaitTermination(t1); |
| 352 | assertEquals(t2, sync.getFirstQueuedThread()); |
| 353 | sync.release(); |
| 354 | awaitTermination(t2); |
| 355 | assertNull(sync.getFirstQueuedThread()); |
| 356 | } |
| 357 | |
| 358 | /** |
| 359 | * hasContended reports false if no thread has ever blocked, else true |
| 360 | */ |
| 361 | public void testHasContended() { |
| 362 | final Mutex sync = new Mutex(); |
| 363 | assertFalse(sync.hasContended()); |
| 364 | sync.acquire(); |
| 365 | assertFalse(sync.hasContended()); |
| 366 | Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
| 367 | waitForQueuedThread(sync, t1); |
| 368 | assertTrue(sync.hasContended()); |
| 369 | Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
| 370 | waitForQueuedThread(sync, t2); |
| 371 | assertTrue(sync.hasContended()); |
| 372 | t1.interrupt(); |
| 373 | awaitTermination(t1); |
| 374 | assertTrue(sync.hasContended()); |
| 375 | sync.release(); |
| 376 | awaitTermination(t2); |
| 377 | assertTrue(sync.hasContended()); |
| 378 | } |
| 379 | |
| 380 | /** |
| 381 | * getQueuedThreads returns all waiting threads |
| 382 | */ |
| 383 | public void testGetQueuedThreads() { |
| 384 | final Mutex sync = new Mutex(); |
| 385 | Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
| 386 | Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
| 387 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 388 | sync.acquire(); |
| 389 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 390 | t1.start(); |
| 391 | waitForQueuedThread(sync, t1); |
| 392 | assertHasExclusiveQueuedThreads(sync, t1); |
| 393 | assertTrue(sync.getQueuedThreads().contains(t1)); |
| 394 | assertFalse(sync.getQueuedThreads().contains(t2)); |
| 395 | t2.start(); |
| 396 | waitForQueuedThread(sync, t2); |
| 397 | assertHasExclusiveQueuedThreads(sync, t1, t2); |
| 398 | assertTrue(sync.getQueuedThreads().contains(t1)); |
| 399 | assertTrue(sync.getQueuedThreads().contains(t2)); |
| 400 | t1.interrupt(); |
| 401 | awaitTermination(t1); |
| 402 | assertHasExclusiveQueuedThreads(sync, t2); |
| 403 | sync.release(); |
| 404 | awaitTermination(t2); |
| 405 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * getExclusiveQueuedThreads returns all exclusive waiting threads |
| 410 | */ |
| 411 | public void testGetExclusiveQueuedThreads() { |
| 412 | final Mutex sync = new Mutex(); |
| 413 | Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
| 414 | Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
| 415 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 416 | sync.acquire(); |
| 417 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 418 | t1.start(); |
| 419 | waitForQueuedThread(sync, t1); |
| 420 | assertHasExclusiveQueuedThreads(sync, t1); |
| 421 | assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
| 422 | assertFalse(sync.getExclusiveQueuedThreads().contains(t2)); |
| 423 | t2.start(); |
| 424 | waitForQueuedThread(sync, t2); |
| 425 | assertHasExclusiveQueuedThreads(sync, t1, t2); |
| 426 | assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
| 427 | assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
| 428 | t1.interrupt(); |
| 429 | awaitTermination(t1); |
| 430 | assertHasExclusiveQueuedThreads(sync, t2); |
| 431 | sync.release(); |
| 432 | awaitTermination(t2); |
| 433 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 434 | } |
| 435 | |
| 436 | /** |
| 437 | * getSharedQueuedThreads does not include exclusively waiting threads |
| 438 | */ |
| 439 | public void testGetSharedQueuedThreads_Exclusive() { |
| 440 | final Mutex sync = new Mutex(); |
| 441 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 442 | sync.acquire(); |
| 443 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 444 | Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
| 445 | waitForQueuedThread(sync, t1); |
| 446 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 447 | Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
| 448 | waitForQueuedThread(sync, t2); |
| 449 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 450 | t1.interrupt(); |
| 451 | awaitTermination(t1); |
| 452 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 453 | sync.release(); |
| 454 | awaitTermination(t2); |
| 455 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * getSharedQueuedThreads returns all shared waiting threads |
| 460 | */ |
| 461 | public void testGetSharedQueuedThreads_Shared() { |
| 462 | final BooleanLatch l = new BooleanLatch(); |
| 463 | assertHasSharedQueuedThreads(l, NO_THREADS); |
| 464 | Thread t1 = newStartedThread(new CheckedInterruptedRunnable() { |
| 465 | public void realRun() throws InterruptedException { |
| 466 | l.acquireSharedInterruptibly(0); |
| 467 | }}); |
| 468 | waitForQueuedThread(l, t1); |
| 469 | assertHasSharedQueuedThreads(l, t1); |
| 470 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 471 | public void realRun() throws InterruptedException { |
| 472 | l.acquireSharedInterruptibly(0); |
| 473 | }}); |
| 474 | waitForQueuedThread(l, t2); |
| 475 | assertHasSharedQueuedThreads(l, t1, t2); |
| 476 | t1.interrupt(); |
| 477 | awaitTermination(t1); |
| 478 | assertHasSharedQueuedThreads(l, t2); |
| 479 | assertTrue(l.releaseShared(0)); |
| 480 | awaitTermination(t2); |
| 481 | assertHasSharedQueuedThreads(l, NO_THREADS); |
| 482 | } |
| 483 | |
| 484 | /** |
| 485 | * tryAcquireNanos is interruptible |
| 486 | */ |
| 487 | public void testTryAcquireNanos_Interruptible() { |
| 488 | final Mutex sync = new Mutex(); |
| 489 | sync.acquire(); |
| 490 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 491 | public void realRun() throws InterruptedException { |
| 492 | sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS)); |
| 493 | }}); |
| 494 | |
| 495 | waitForQueuedThread(sync, t); |
| 496 | t.interrupt(); |
| 497 | awaitTermination(t); |
| 498 | } |
| 499 | |
| 500 | /** |
| 501 | * tryAcquire on exclusively held sync fails |
| 502 | */ |
| 503 | public void testTryAcquireWhenSynced() { |
| 504 | final Mutex sync = new Mutex(); |
| 505 | sync.acquire(); |
| 506 | Thread t = newStartedThread(new CheckedRunnable() { |
| 507 | public void realRun() { |
| 508 | assertFalse(sync.tryAcquire()); |
| 509 | }}); |
| 510 | |
| 511 | awaitTermination(t); |
| 512 | sync.release(); |
| 513 | } |
| 514 | |
| 515 | /** |
| 516 | * tryAcquireNanos on an exclusively held sync times out |
| 517 | */ |
| 518 | public void testAcquireNanos_Timeout() { |
| 519 | final Mutex sync = new Mutex(); |
| 520 | sync.acquire(); |
| 521 | Thread t = newStartedThread(new CheckedRunnable() { |
| 522 | public void realRun() throws InterruptedException { |
| 523 | long startTime = System.nanoTime(); |
| 524 | long nanos = MILLISECONDS.toNanos(timeoutMillis()); |
| 525 | assertFalse(sync.tryAcquireNanos(nanos)); |
| 526 | assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
| 527 | }}); |
| 528 | |
| 529 | awaitTermination(t); |
| 530 | sync.release(); |
| 531 | } |
| 532 | |
| 533 | /** |
| 534 | * getState is true when acquired and false when not |
| 535 | */ |
| 536 | public void testGetState() { |
| 537 | final Mutex sync = new Mutex(); |
| 538 | sync.acquire(); |
| 539 | assertTrue(sync.isHeldExclusively()); |
| 540 | sync.release(); |
| 541 | assertFalse(sync.isHeldExclusively()); |
| 542 | |
| 543 | final BooleanLatch acquired = new BooleanLatch(); |
| 544 | final BooleanLatch done = new BooleanLatch(); |
| 545 | Thread t = newStartedThread(new CheckedRunnable() { |
| 546 | public void realRun() throws InterruptedException { |
| 547 | sync.acquire(); |
| 548 | assertTrue(acquired.releaseShared(0)); |
| 549 | done.acquireShared(0); |
| 550 | sync.release(); |
| 551 | }}); |
| 552 | |
| 553 | acquired.acquireShared(0); |
| 554 | assertTrue(sync.isHeldExclusively()); |
| 555 | assertTrue(done.releaseShared(0)); |
| 556 | awaitTermination(t); |
| 557 | assertFalse(sync.isHeldExclusively()); |
| 558 | } |
| 559 | |
| 560 | /** |
| 561 | * acquireInterruptibly succeeds when released, else is interruptible |
| 562 | */ |
| 563 | public void testAcquireInterruptibly() throws InterruptedException { |
| 564 | final Mutex sync = new Mutex(); |
| 565 | final BooleanLatch threadStarted = new BooleanLatch(); |
| 566 | sync.acquireInterruptibly(); |
| 567 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 568 | public void realRun() throws InterruptedException { |
| 569 | assertTrue(threadStarted.releaseShared(0)); |
| 570 | sync.acquireInterruptibly(); |
| 571 | }}); |
| 572 | |
| 573 | threadStarted.acquireShared(0); |
| 574 | waitForQueuedThread(sync, t); |
| 575 | t.interrupt(); |
| 576 | awaitTermination(t); |
| 577 | assertTrue(sync.isHeldExclusively()); |
| 578 | } |
| 579 | |
| 580 | /** |
| 581 | * owns is true for a condition created by sync else false |
| 582 | */ |
| 583 | public void testOwns() { |
| 584 | final Mutex sync = new Mutex(); |
| 585 | final ConditionObject c = sync.newCondition(); |
| 586 | final Mutex sync2 = new Mutex(); |
| 587 | assertTrue(sync.owns(c)); |
| 588 | assertFalse(sync2.owns(c)); |
| 589 | } |
| 590 | |
| 591 | /** |
| 592 | * Calling await without holding sync throws IllegalMonitorStateException |
| 593 | */ |
| 594 | public void testAwait_IMSE() { |
| 595 | final Mutex sync = new Mutex(); |
| 596 | final ConditionObject c = sync.newCondition(); |
| 597 | for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
| 598 | long startTime = System.nanoTime(); |
| 599 | try { |
| 600 | await(c, awaitMethod); |
| 601 | shouldThrow(); |
| 602 | } catch (IllegalMonitorStateException success) { |
| 603 | } catch (InterruptedException e) { threadUnexpectedException(e); } |
| 604 | assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | /** |
| 609 | * Calling signal without holding sync throws IllegalMonitorStateException |
| 610 | */ |
| 611 | public void testSignal_IMSE() { |
| 612 | final Mutex sync = new Mutex(); |
| 613 | final ConditionObject c = sync.newCondition(); |
| 614 | try { |
| 615 | c.signal(); |
| 616 | shouldThrow(); |
| 617 | } catch (IllegalMonitorStateException success) {} |
| 618 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 619 | } |
| 620 | |
| 621 | /** |
| 622 | * Calling signalAll without holding sync throws IllegalMonitorStateException |
| 623 | */ |
| 624 | public void testSignalAll_IMSE() { |
| 625 | final Mutex sync = new Mutex(); |
| 626 | final ConditionObject c = sync.newCondition(); |
| 627 | try { |
| 628 | c.signalAll(); |
| 629 | shouldThrow(); |
| 630 | } catch (IllegalMonitorStateException success) {} |
| 631 | } |
| 632 | |
| 633 | /** |
| 634 | * await/awaitNanos/awaitUntil without a signal times out |
| 635 | */ |
| 636 | public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); } |
| 637 | public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); } |
| 638 | public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); } |
| 639 | public void testAwait_Timeout(AwaitMethod awaitMethod) { |
| 640 | final Mutex sync = new Mutex(); |
| 641 | final ConditionObject c = sync.newCondition(); |
| 642 | sync.acquire(); |
| 643 | assertAwaitTimesOut(c, awaitMethod); |
| 644 | sync.release(); |
| 645 | } |
| 646 | |
| 647 | /** |
| 648 | * await/awaitNanos/awaitUntil returns when signalled |
| 649 | */ |
| 650 | public void testSignal_await() { testSignal(AwaitMethod.await); } |
| 651 | public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); } |
| 652 | public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); } |
| 653 | public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); } |
| 654 | public void testSignal(final AwaitMethod awaitMethod) { |
| 655 | final Mutex sync = new Mutex(); |
| 656 | final ConditionObject c = sync.newCondition(); |
| 657 | final BooleanLatch acquired = new BooleanLatch(); |
| 658 | Thread t = newStartedThread(new CheckedRunnable() { |
| 659 | public void realRun() throws InterruptedException { |
| 660 | sync.acquire(); |
| 661 | assertTrue(acquired.releaseShared(0)); |
| 662 | await(c, awaitMethod); |
| 663 | sync.release(); |
| 664 | }}); |
| 665 | |
| 666 | acquired.acquireShared(0); |
| 667 | sync.acquire(); |
| 668 | assertHasWaitersLocked(sync, c, t); |
| 669 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 670 | c.signal(); |
| 671 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 672 | assertHasExclusiveQueuedThreads(sync, t); |
| 673 | sync.release(); |
| 674 | awaitTermination(t); |
| 675 | } |
| 676 | |
| 677 | /** |
| 678 | * hasWaiters(null) throws NullPointerException |
| 679 | */ |
| 680 | public void testHasWaitersNPE() { |
| 681 | final Mutex sync = new Mutex(); |
| 682 | try { |
| 683 | sync.hasWaiters(null); |
| 684 | shouldThrow(); |
| 685 | } catch (NullPointerException success) {} |
| 686 | } |
| 687 | |
| 688 | /** |
| 689 | * getWaitQueueLength(null) throws NullPointerException |
| 690 | */ |
| 691 | public void testGetWaitQueueLengthNPE() { |
| 692 | final Mutex sync = new Mutex(); |
| 693 | try { |
| 694 | sync.getWaitQueueLength(null); |
| 695 | shouldThrow(); |
| 696 | } catch (NullPointerException success) {} |
| 697 | } |
| 698 | |
| 699 | /** |
| 700 | * getWaitingThreads throws NPE if null |
| 701 | */ |
| 702 | public void testGetWaitingThreadsNPE() { |
| 703 | final Mutex sync = new Mutex(); |
| 704 | try { |
| 705 | sync.getWaitingThreads(null); |
| 706 | shouldThrow(); |
| 707 | } catch (NullPointerException success) {} |
| 708 | } |
| 709 | |
| 710 | /** |
| 711 | * hasWaiters throws IllegalArgumentException if not owned |
| 712 | */ |
| 713 | public void testHasWaitersIAE() { |
| 714 | final Mutex sync = new Mutex(); |
| 715 | final ConditionObject c = sync.newCondition(); |
| 716 | final Mutex sync2 = new Mutex(); |
| 717 | try { |
| 718 | sync2.hasWaiters(c); |
| 719 | shouldThrow(); |
| 720 | } catch (IllegalArgumentException success) {} |
| 721 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 722 | } |
| 723 | |
| 724 | /** |
| 725 | * hasWaiters throws IllegalMonitorStateException if not synced |
| 726 | */ |
| 727 | public void testHasWaitersIMSE() { |
| 728 | final Mutex sync = new Mutex(); |
| 729 | final ConditionObject c = sync.newCondition(); |
| 730 | try { |
| 731 | sync.hasWaiters(c); |
| 732 | shouldThrow(); |
| 733 | } catch (IllegalMonitorStateException success) {} |
| 734 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 735 | } |
| 736 | |
| 737 | /** |
| 738 | * getWaitQueueLength throws IllegalArgumentException if not owned |
| 739 | */ |
| 740 | public void testGetWaitQueueLengthIAE() { |
| 741 | final Mutex sync = new Mutex(); |
| 742 | final ConditionObject c = sync.newCondition(); |
| 743 | final Mutex sync2 = new Mutex(); |
| 744 | try { |
| 745 | sync2.getWaitQueueLength(c); |
| 746 | shouldThrow(); |
| 747 | } catch (IllegalArgumentException success) {} |
| 748 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 749 | } |
| 750 | |
| 751 | /** |
| 752 | * getWaitQueueLength throws IllegalMonitorStateException if not synced |
| 753 | */ |
| 754 | public void testGetWaitQueueLengthIMSE() { |
| 755 | final Mutex sync = new Mutex(); |
| 756 | final ConditionObject c = sync.newCondition(); |
| 757 | try { |
| 758 | sync.getWaitQueueLength(c); |
| 759 | shouldThrow(); |
| 760 | } catch (IllegalMonitorStateException success) {} |
| 761 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 762 | } |
| 763 | |
| 764 | /** |
| 765 | * getWaitingThreads throws IllegalArgumentException if not owned |
| 766 | */ |
| 767 | public void testGetWaitingThreadsIAE() { |
| 768 | final Mutex sync = new Mutex(); |
| 769 | final ConditionObject c = sync.newCondition(); |
| 770 | final Mutex sync2 = new Mutex(); |
| 771 | try { |
| 772 | sync2.getWaitingThreads(c); |
| 773 | shouldThrow(); |
| 774 | } catch (IllegalArgumentException success) {} |
| 775 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 776 | } |
| 777 | |
| 778 | /** |
| 779 | * getWaitingThreads throws IllegalMonitorStateException if not synced |
| 780 | */ |
| 781 | public void testGetWaitingThreadsIMSE() { |
| 782 | final Mutex sync = new Mutex(); |
| 783 | final ConditionObject c = sync.newCondition(); |
| 784 | try { |
| 785 | sync.getWaitingThreads(c); |
| 786 | shouldThrow(); |
| 787 | } catch (IllegalMonitorStateException success) {} |
| 788 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 789 | } |
| 790 | |
| 791 | /** |
| 792 | * hasWaiters returns true when a thread is waiting, else false |
| 793 | */ |
| 794 | public void testHasWaiters() { |
| 795 | final Mutex sync = new Mutex(); |
| 796 | final ConditionObject c = sync.newCondition(); |
| 797 | final BooleanLatch acquired = new BooleanLatch(); |
| 798 | Thread t = newStartedThread(new CheckedRunnable() { |
| 799 | public void realRun() throws InterruptedException { |
| 800 | sync.acquire(); |
| 801 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 802 | assertFalse(sync.hasWaiters(c)); |
| 803 | assertTrue(acquired.releaseShared(0)); |
| 804 | c.await(); |
| 805 | sync.release(); |
| 806 | }}); |
| 807 | |
| 808 | acquired.acquireShared(0); |
| 809 | sync.acquire(); |
| 810 | assertHasWaitersLocked(sync, c, t); |
| 811 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 812 | assertTrue(sync.hasWaiters(c)); |
| 813 | c.signal(); |
| 814 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 815 | assertHasExclusiveQueuedThreads(sync, t); |
| 816 | assertFalse(sync.hasWaiters(c)); |
| 817 | sync.release(); |
| 818 | |
| 819 | awaitTermination(t); |
| 820 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 821 | } |
| 822 | |
| 823 | /** |
| 824 | * getWaitQueueLength returns number of waiting threads |
| 825 | */ |
| 826 | public void testGetWaitQueueLength() { |
| 827 | final Mutex sync = new Mutex(); |
| 828 | final ConditionObject c = sync.newCondition(); |
| 829 | final BooleanLatch acquired1 = new BooleanLatch(); |
| 830 | final BooleanLatch acquired2 = new BooleanLatch(); |
| 831 | final Thread t1 = newStartedThread(new CheckedRunnable() { |
| 832 | public void realRun() throws InterruptedException { |
| 833 | sync.acquire(); |
| 834 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 835 | assertEquals(0, sync.getWaitQueueLength(c)); |
| 836 | assertTrue(acquired1.releaseShared(0)); |
| 837 | c.await(); |
| 838 | sync.release(); |
| 839 | }}); |
| 840 | acquired1.acquireShared(0); |
| 841 | sync.acquire(); |
| 842 | assertHasWaitersLocked(sync, c, t1); |
| 843 | assertEquals(1, sync.getWaitQueueLength(c)); |
| 844 | sync.release(); |
| 845 | |
| 846 | final Thread t2 = newStartedThread(new CheckedRunnable() { |
| 847 | public void realRun() throws InterruptedException { |
| 848 | sync.acquire(); |
| 849 | assertHasWaitersLocked(sync, c, t1); |
| 850 | assertEquals(1, sync.getWaitQueueLength(c)); |
| 851 | assertTrue(acquired2.releaseShared(0)); |
| 852 | c.await(); |
| 853 | sync.release(); |
| 854 | }}); |
| 855 | acquired2.acquireShared(0); |
| 856 | sync.acquire(); |
| 857 | assertHasWaitersLocked(sync, c, t1, t2); |
| 858 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 859 | assertEquals(2, sync.getWaitQueueLength(c)); |
| 860 | c.signalAll(); |
| 861 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 862 | assertHasExclusiveQueuedThreads(sync, t1, t2); |
| 863 | assertEquals(0, sync.getWaitQueueLength(c)); |
| 864 | sync.release(); |
| 865 | |
| 866 | awaitTermination(t1); |
| 867 | awaitTermination(t2); |
| 868 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 869 | } |
| 870 | |
| 871 | /** |
| 872 | * getWaitingThreads returns only and all waiting threads |
| 873 | */ |
| 874 | public void testGetWaitingThreads() { |
| 875 | final Mutex sync = new Mutex(); |
| 876 | final ConditionObject c = sync.newCondition(); |
| 877 | final BooleanLatch acquired1 = new BooleanLatch(); |
| 878 | final BooleanLatch acquired2 = new BooleanLatch(); |
| 879 | final Thread t1 = new Thread(new CheckedRunnable() { |
| 880 | public void realRun() throws InterruptedException { |
| 881 | sync.acquire(); |
| 882 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 883 | assertTrue(sync.getWaitingThreads(c).isEmpty()); |
| 884 | assertTrue(acquired1.releaseShared(0)); |
| 885 | c.await(); |
| 886 | sync.release(); |
| 887 | }}); |
| 888 | |
| 889 | final Thread t2 = new Thread(new CheckedRunnable() { |
| 890 | public void realRun() throws InterruptedException { |
| 891 | sync.acquire(); |
| 892 | assertHasWaitersLocked(sync, c, t1); |
| 893 | assertTrue(sync.getWaitingThreads(c).contains(t1)); |
| 894 | assertFalse(sync.getWaitingThreads(c).isEmpty()); |
| 895 | assertEquals(1, sync.getWaitingThreads(c).size()); |
| 896 | assertTrue(acquired2.releaseShared(0)); |
| 897 | c.await(); |
| 898 | sync.release(); |
| 899 | }}); |
| 900 | |
| 901 | sync.acquire(); |
| 902 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 903 | assertFalse(sync.getWaitingThreads(c).contains(t1)); |
| 904 | assertFalse(sync.getWaitingThreads(c).contains(t2)); |
| 905 | assertTrue(sync.getWaitingThreads(c).isEmpty()); |
| 906 | assertEquals(0, sync.getWaitingThreads(c).size()); |
| 907 | sync.release(); |
| 908 | |
| 909 | t1.start(); |
| 910 | acquired1.acquireShared(0); |
| 911 | sync.acquire(); |
| 912 | assertHasWaitersLocked(sync, c, t1); |
| 913 | assertTrue(sync.getWaitingThreads(c).contains(t1)); |
| 914 | assertFalse(sync.getWaitingThreads(c).contains(t2)); |
| 915 | assertFalse(sync.getWaitingThreads(c).isEmpty()); |
| 916 | assertEquals(1, sync.getWaitingThreads(c).size()); |
| 917 | sync.release(); |
| 918 | |
| 919 | t2.start(); |
| 920 | acquired2.acquireShared(0); |
| 921 | sync.acquire(); |
| 922 | assertHasWaitersLocked(sync, c, t1, t2); |
| 923 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 924 | assertTrue(sync.getWaitingThreads(c).contains(t1)); |
| 925 | assertTrue(sync.getWaitingThreads(c).contains(t2)); |
| 926 | assertFalse(sync.getWaitingThreads(c).isEmpty()); |
| 927 | assertEquals(2, sync.getWaitingThreads(c).size()); |
| 928 | c.signalAll(); |
| 929 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 930 | assertHasExclusiveQueuedThreads(sync, t1, t2); |
| 931 | assertFalse(sync.getWaitingThreads(c).contains(t1)); |
| 932 | assertFalse(sync.getWaitingThreads(c).contains(t2)); |
| 933 | assertTrue(sync.getWaitingThreads(c).isEmpty()); |
| 934 | assertEquals(0, sync.getWaitingThreads(c).size()); |
| 935 | sync.release(); |
| 936 | |
| 937 | awaitTermination(t1); |
| 938 | awaitTermination(t2); |
| 939 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 940 | } |
| 941 | |
| 942 | /** |
| 943 | * awaitUninterruptibly is uninterruptible |
| 944 | */ |
| 945 | public void testAwaitUninterruptibly() { |
| 946 | final Mutex sync = new Mutex(); |
| 947 | final ConditionObject c = sync.newCondition(); |
| 948 | final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
| 949 | Thread t = newStartedThread(new CheckedRunnable() { |
| 950 | public void realRun() { |
| 951 | sync.acquire(); |
| 952 | assertTrue(pleaseInterrupt.releaseShared(0)); |
| 953 | c.awaitUninterruptibly(); |
| 954 | assertTrue(Thread.interrupted()); |
| 955 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 956 | sync.release(); |
| 957 | }}); |
| 958 | |
| 959 | pleaseInterrupt.acquireShared(0); |
| 960 | sync.acquire(); |
| 961 | assertHasWaitersLocked(sync, c, t); |
| 962 | sync.release(); |
| 963 | t.interrupt(); |
| 964 | assertHasWaitersUnlocked(sync, c, t); |
| 965 | assertThreadStaysAlive(t); |
| 966 | sync.acquire(); |
| 967 | assertHasWaitersLocked(sync, c, t); |
| 968 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 969 | c.signal(); |
| 970 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 971 | assertHasExclusiveQueuedThreads(sync, t); |
| 972 | sync.release(); |
| 973 | awaitTermination(t); |
| 974 | } |
| 975 | |
| 976 | /** |
| 977 | * await/awaitNanos/awaitUntil is interruptible |
| 978 | */ |
| 979 | public void testInterruptible_await() { testInterruptible(AwaitMethod.await); } |
| 980 | public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); } |
| 981 | public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); } |
| 982 | public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); } |
| 983 | public void testInterruptible(final AwaitMethod awaitMethod) { |
| 984 | final Mutex sync = new Mutex(); |
| 985 | final ConditionObject c = sync.newCondition(); |
| 986 | final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
| 987 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 988 | public void realRun() throws InterruptedException { |
| 989 | sync.acquire(); |
| 990 | assertTrue(pleaseInterrupt.releaseShared(0)); |
| 991 | await(c, awaitMethod); |
| 992 | }}); |
| 993 | |
| 994 | pleaseInterrupt.acquireShared(0); |
| 995 | t.interrupt(); |
| 996 | awaitTermination(t); |
| 997 | } |
| 998 | |
| 999 | /** |
| 1000 | * signalAll wakes up all threads |
| 1001 | */ |
| 1002 | public void testSignalAll_await() { testSignalAll(AwaitMethod.await); } |
| 1003 | public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); } |
| 1004 | public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); } |
| 1005 | public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); } |
| 1006 | public void testSignalAll(final AwaitMethod awaitMethod) { |
| 1007 | final Mutex sync = new Mutex(); |
| 1008 | final ConditionObject c = sync.newCondition(); |
| 1009 | final BooleanLatch acquired1 = new BooleanLatch(); |
| 1010 | final BooleanLatch acquired2 = new BooleanLatch(); |
| 1011 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 1012 | public void realRun() throws InterruptedException { |
| 1013 | sync.acquire(); |
| 1014 | acquired1.releaseShared(0); |
| 1015 | await(c, awaitMethod); |
| 1016 | sync.release(); |
| 1017 | }}); |
| 1018 | |
| 1019 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 1020 | public void realRun() throws InterruptedException { |
| 1021 | sync.acquire(); |
| 1022 | acquired2.releaseShared(0); |
| 1023 | await(c, awaitMethod); |
| 1024 | sync.release(); |
| 1025 | }}); |
| 1026 | |
| 1027 | acquired1.acquireShared(0); |
| 1028 | acquired2.acquireShared(0); |
| 1029 | sync.acquire(); |
| 1030 | assertHasWaitersLocked(sync, c, t1, t2); |
| 1031 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 1032 | c.signalAll(); |
| 1033 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 1034 | assertHasExclusiveQueuedThreads(sync, t1, t2); |
| 1035 | sync.release(); |
| 1036 | awaitTermination(t1); |
| 1037 | awaitTermination(t2); |
| 1038 | } |
| 1039 | |
| 1040 | /** |
| 1041 | * toString indicates current state |
| 1042 | */ |
| 1043 | public void testToString() { |
| 1044 | Mutex sync = new Mutex(); |
| 1045 | assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED)); |
| 1046 | sync.acquire(); |
| 1047 | assertTrue(sync.toString().contains("State = " + Mutex.LOCKED)); |
| 1048 | } |
| 1049 | |
| 1050 | /** |
| 1051 | * A serialized AQS deserializes with current state, but no queued threads |
| 1052 | */ |
| 1053 | public void testSerialization() { |
| 1054 | Mutex sync = new Mutex(); |
| 1055 | assertFalse(serialClone(sync).isHeldExclusively()); |
| 1056 | sync.acquire(); |
| 1057 | Thread t = newStartedThread(new InterruptedSyncRunnable(sync)); |
| 1058 | waitForQueuedThread(sync, t); |
| 1059 | assertTrue(sync.isHeldExclusively()); |
| 1060 | |
| 1061 | Mutex clone = serialClone(sync); |
| 1062 | assertTrue(clone.isHeldExclusively()); |
| 1063 | assertHasExclusiveQueuedThreads(sync, t); |
| 1064 | assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
| 1065 | t.interrupt(); |
| 1066 | awaitTermination(t); |
| 1067 | sync.release(); |
| 1068 | assertFalse(sync.isHeldExclusively()); |
| 1069 | assertTrue(clone.isHeldExclusively()); |
| 1070 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 1071 | assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
| 1072 | } |
| 1073 | |
| 1074 | /** |
| 1075 | * tryReleaseShared setting state changes getState |
| 1076 | */ |
| 1077 | public void testGetStateWithReleaseShared() { |
| 1078 | final BooleanLatch l = new BooleanLatch(); |
| 1079 | assertFalse(l.isSignalled()); |
| 1080 | assertTrue(l.releaseShared(0)); |
| 1081 | assertTrue(l.isSignalled()); |
| 1082 | } |
| 1083 | |
| 1084 | /** |
| 1085 | * releaseShared has no effect when already signalled |
| 1086 | */ |
| 1087 | public void testReleaseShared() { |
| 1088 | final BooleanLatch l = new BooleanLatch(); |
| 1089 | assertFalse(l.isSignalled()); |
| 1090 | assertTrue(l.releaseShared(0)); |
| 1091 | assertTrue(l.isSignalled()); |
| 1092 | assertTrue(l.releaseShared(0)); |
| 1093 | assertTrue(l.isSignalled()); |
| 1094 | } |
| 1095 | |
| 1096 | /** |
| 1097 | * acquireSharedInterruptibly returns after release, but not before |
| 1098 | */ |
| 1099 | public void testAcquireSharedInterruptibly() { |
| 1100 | final BooleanLatch l = new BooleanLatch(); |
| 1101 | |
| 1102 | Thread t = newStartedThread(new CheckedRunnable() { |
| 1103 | public void realRun() throws InterruptedException { |
| 1104 | assertFalse(l.isSignalled()); |
| 1105 | l.acquireSharedInterruptibly(0); |
| 1106 | assertTrue(l.isSignalled()); |
| 1107 | l.acquireSharedInterruptibly(0); |
| 1108 | assertTrue(l.isSignalled()); |
| 1109 | }}); |
| 1110 | |
| 1111 | waitForQueuedThread(l, t); |
| 1112 | assertFalse(l.isSignalled()); |
| 1113 | assertThreadStaysAlive(t); |
| 1114 | assertHasSharedQueuedThreads(l, t); |
| 1115 | assertTrue(l.releaseShared(0)); |
| 1116 | assertTrue(l.isSignalled()); |
| 1117 | awaitTermination(t); |
| 1118 | } |
| 1119 | |
| 1120 | /** |
| 1121 | * tryAcquireSharedNanos returns after release, but not before |
| 1122 | */ |
| 1123 | public void testTryAcquireSharedNanos() { |
| 1124 | final BooleanLatch l = new BooleanLatch(); |
| 1125 | |
| 1126 | Thread t = newStartedThread(new CheckedRunnable() { |
| 1127 | public void realRun() throws InterruptedException { |
| 1128 | assertFalse(l.isSignalled()); |
| 1129 | long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
| 1130 | assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
| 1131 | assertTrue(l.isSignalled()); |
| 1132 | assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
| 1133 | assertTrue(l.isSignalled()); |
| 1134 | }}); |
| 1135 | |
| 1136 | waitForQueuedThread(l, t); |
| 1137 | assertFalse(l.isSignalled()); |
| 1138 | assertThreadStaysAlive(t); |
| 1139 | assertTrue(l.releaseShared(0)); |
| 1140 | assertTrue(l.isSignalled()); |
| 1141 | awaitTermination(t); |
| 1142 | } |
| 1143 | |
| 1144 | /** |
| 1145 | * acquireSharedInterruptibly is interruptible |
| 1146 | */ |
| 1147 | public void testAcquireSharedInterruptibly_Interruptible() { |
| 1148 | final BooleanLatch l = new BooleanLatch(); |
| 1149 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 1150 | public void realRun() throws InterruptedException { |
| 1151 | assertFalse(l.isSignalled()); |
| 1152 | l.acquireSharedInterruptibly(0); |
| 1153 | }}); |
| 1154 | |
| 1155 | waitForQueuedThread(l, t); |
| 1156 | assertFalse(l.isSignalled()); |
| 1157 | t.interrupt(); |
| 1158 | awaitTermination(t); |
| 1159 | assertFalse(l.isSignalled()); |
| 1160 | } |
| 1161 | |
| 1162 | /** |
| 1163 | * tryAcquireSharedNanos is interruptible |
| 1164 | */ |
| 1165 | public void testTryAcquireSharedNanos_Interruptible() { |
| 1166 | final BooleanLatch l = new BooleanLatch(); |
| 1167 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 1168 | public void realRun() throws InterruptedException { |
| 1169 | assertFalse(l.isSignalled()); |
| 1170 | long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
| 1171 | l.tryAcquireSharedNanos(0, nanos); |
| 1172 | }}); |
| 1173 | |
| 1174 | waitForQueuedThread(l, t); |
| 1175 | assertFalse(l.isSignalled()); |
| 1176 | t.interrupt(); |
| 1177 | awaitTermination(t); |
| 1178 | assertFalse(l.isSignalled()); |
| 1179 | } |
| 1180 | |
| 1181 | /** |
| 1182 | * tryAcquireSharedNanos times out if not released before timeout |
| 1183 | */ |
| 1184 | public void testTryAcquireSharedNanos_Timeout() { |
| 1185 | final BooleanLatch l = new BooleanLatch(); |
| 1186 | final BooleanLatch observedQueued = new BooleanLatch(); |
| 1187 | final long timeoutMillis = timeoutMillis(); |
| 1188 | Thread t = newStartedThread(new CheckedRunnable() { |
| 1189 | public void realRun() throws InterruptedException { |
| 1190 | assertFalse(l.isSignalled()); |
| 1191 | for (long millis = timeoutMillis(); |
| 1192 | !observedQueued.isSignalled(); |
| 1193 | millis *= 2) { |
| 1194 | long nanos = MILLISECONDS.toNanos(millis); |
| 1195 | long startTime = System.nanoTime(); |
| 1196 | assertFalse(l.tryAcquireSharedNanos(0, nanos)); |
| 1197 | assertTrue(millisElapsedSince(startTime) >= millis); |
| 1198 | } |
| 1199 | assertFalse(l.isSignalled()); |
| 1200 | }}); |
| 1201 | |
| 1202 | waitForQueuedThread(l, t); |
| 1203 | observedQueued.releaseShared(0); |
| 1204 | assertFalse(l.isSignalled()); |
| 1205 | awaitTermination(t); |
| 1206 | assertFalse(l.isSignalled()); |
| 1207 | } |
| 1208 | |
| 1209 | } |