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 | |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 11 | import static java.util.concurrent.TimeUnit.MILLISECONDS; |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 12 | import static java.util.concurrent.TimeUnit.NANOSECONDS; |
| 13 | |
| 14 | import java.util.Arrays; |
| 15 | import java.util.Collection; |
| 16 | import java.util.HashSet; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 17 | import java.util.concurrent.locks.AbstractQueuedSynchronizer; |
| 18 | import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject; |
| 19 | |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 20 | import junit.framework.AssertionFailedError; |
| 21 | import junit.framework.Test; |
| 22 | import junit.framework.TestSuite; |
| 23 | |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 24 | public class AbstractQueuedSynchronizerTest extends JSR166TestCase { |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 25 | // android-note: Removed because the CTS runner does a bad job of |
| 26 | // retrying tests that have suite() declarations. |
| 27 | // |
| 28 | // public static void main(String[] args) { |
| 29 | // main(suite(), args); |
| 30 | // } |
| 31 | // public static Test suite() { |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 32 | // return new TestSuite(AbstractQueuedSynchronizerTest.class); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 33 | // } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 34 | |
| 35 | /** |
| 36 | * A simple mutex class, adapted from the class javadoc. Exclusive |
| 37 | * acquire tests exercise this as a sample user extension. Other |
| 38 | * methods/features of AbstractQueuedSynchronizer are tested via |
| 39 | * other test classes, including those for ReentrantLock, |
| 40 | * ReentrantReadWriteLock, and Semaphore. |
| 41 | */ |
| 42 | static class Mutex extends AbstractQueuedSynchronizer { |
| 43 | /** An eccentric value for locked synchronizer state. */ |
| 44 | static final int LOCKED = (1 << 31) | (1 << 15); |
| 45 | |
| 46 | static final int UNLOCKED = 0; |
| 47 | |
| 48 | @Override public boolean isHeldExclusively() { |
| 49 | int state = getState(); |
| 50 | assertTrue(state == UNLOCKED || state == LOCKED); |
| 51 | return state == LOCKED; |
| 52 | } |
| 53 | |
| 54 | @Override public boolean tryAcquire(int acquires) { |
| 55 | assertEquals(LOCKED, acquires); |
| 56 | return compareAndSetState(UNLOCKED, LOCKED); |
| 57 | } |
| 58 | |
| 59 | @Override public boolean tryRelease(int releases) { |
| 60 | if (getState() != LOCKED) throw new IllegalMonitorStateException(); |
| 61 | assertEquals(LOCKED, releases); |
| 62 | setState(UNLOCKED); |
| 63 | return true; |
| 64 | } |
| 65 | |
| 66 | public boolean tryAcquireNanos(long nanos) throws InterruptedException { |
| 67 | return tryAcquireNanos(LOCKED, nanos); |
| 68 | } |
| 69 | |
| 70 | public boolean tryAcquire() { |
| 71 | return tryAcquire(LOCKED); |
| 72 | } |
| 73 | |
| 74 | public boolean tryRelease() { |
| 75 | return tryRelease(LOCKED); |
| 76 | } |
| 77 | |
| 78 | public void acquire() { |
| 79 | acquire(LOCKED); |
| 80 | } |
| 81 | |
| 82 | public void acquireInterruptibly() throws InterruptedException { |
| 83 | acquireInterruptibly(LOCKED); |
| 84 | } |
| 85 | |
| 86 | public void release() { |
| 87 | release(LOCKED); |
| 88 | } |
| 89 | |
| 90 | public ConditionObject newCondition() { |
| 91 | return new ConditionObject(); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * A simple latch class, to test shared mode. |
| 97 | */ |
| 98 | static class BooleanLatch extends AbstractQueuedSynchronizer { |
| 99 | public boolean isSignalled() { return getState() != 0; } |
| 100 | |
| 101 | public int tryAcquireShared(int ignore) { |
| 102 | return isSignalled() ? 1 : -1; |
| 103 | } |
| 104 | |
| 105 | public boolean tryReleaseShared(int ignore) { |
| 106 | setState(1); |
| 107 | return true; |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * A runnable calling acquireInterruptibly that does not expect to |
| 113 | * be interrupted. |
| 114 | */ |
| 115 | class InterruptibleSyncRunnable extends CheckedRunnable { |
| 116 | final Mutex sync; |
| 117 | InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; } |
| 118 | public void realRun() throws InterruptedException { |
| 119 | sync.acquireInterruptibly(); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * A runnable calling acquireInterruptibly that expects to be |
| 125 | * interrupted. |
| 126 | */ |
| 127 | class InterruptedSyncRunnable extends CheckedInterruptedRunnable { |
| 128 | final Mutex sync; |
| 129 | InterruptedSyncRunnable(Mutex sync) { this.sync = sync; } |
| 130 | public void realRun() throws InterruptedException { |
| 131 | sync.acquireInterruptibly(); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | /** A constant to clarify calls to checking methods below. */ |
| 136 | static final Thread[] NO_THREADS = new Thread[0]; |
| 137 | |
| 138 | /** |
| 139 | * Spin-waits until sync.isQueued(t) becomes true. |
| 140 | */ |
| 141 | void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) { |
| 142 | long startTime = System.nanoTime(); |
| 143 | while (!sync.isQueued(t)) { |
| 144 | if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
| 145 | throw new AssertionFailedError("timed out"); |
| 146 | Thread.yield(); |
| 147 | } |
| 148 | assertTrue(t.isAlive()); |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * Checks that sync has exactly the given queued threads. |
| 153 | */ |
| 154 | void assertHasQueuedThreads(AbstractQueuedSynchronizer sync, |
| 155 | Thread... expected) { |
| 156 | Collection<Thread> actual = sync.getQueuedThreads(); |
| 157 | assertEquals(expected.length > 0, sync.hasQueuedThreads()); |
| 158 | assertEquals(expected.length, sync.getQueueLength()); |
| 159 | assertEquals(expected.length, actual.size()); |
| 160 | assertEquals(expected.length == 0, actual.isEmpty()); |
| 161 | assertEquals(new HashSet<Thread>(actual), |
| 162 | new HashSet<Thread>(Arrays.asList(expected))); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Checks that sync has exactly the given (exclusive) queued threads. |
| 167 | */ |
| 168 | void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync, |
| 169 | Thread... expected) { |
| 170 | assertHasQueuedThreads(sync, expected); |
| 171 | assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()), |
| 172 | new HashSet<Thread>(sync.getQueuedThreads())); |
| 173 | assertEquals(0, sync.getSharedQueuedThreads().size()); |
| 174 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * Checks that sync has exactly the given (shared) queued threads. |
| 179 | */ |
| 180 | void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync, |
| 181 | Thread... expected) { |
| 182 | assertHasQueuedThreads(sync, expected); |
| 183 | assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()), |
| 184 | new HashSet<Thread>(sync.getQueuedThreads())); |
| 185 | assertEquals(0, sync.getExclusiveQueuedThreads().size()); |
| 186 | assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * Checks that condition c has exactly the given waiter threads, |
| 191 | * after acquiring mutex. |
| 192 | */ |
| 193 | void assertHasWaitersUnlocked(Mutex sync, ConditionObject c, |
| 194 | Thread... threads) { |
| 195 | sync.acquire(); |
| 196 | assertHasWaitersLocked(sync, c, threads); |
| 197 | sync.release(); |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * Checks that condition c has exactly the given waiter threads. |
| 202 | */ |
| 203 | void assertHasWaitersLocked(Mutex sync, ConditionObject c, |
| 204 | Thread... threads) { |
| 205 | assertEquals(threads.length > 0, sync.hasWaiters(c)); |
| 206 | assertEquals(threads.length, sync.getWaitQueueLength(c)); |
| 207 | assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty()); |
| 208 | assertEquals(threads.length, sync.getWaitingThreads(c).size()); |
| 209 | assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)), |
| 210 | new HashSet<Thread>(Arrays.asList(threads))); |
| 211 | } |
| 212 | |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 213 | enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 214 | |
| 215 | /** |
| 216 | * Awaits condition using the specified AwaitMethod. |
| 217 | */ |
| 218 | void await(ConditionObject c, AwaitMethod awaitMethod) |
| 219 | throws InterruptedException { |
| 220 | long timeoutMillis = 2 * LONG_DELAY_MS; |
| 221 | switch (awaitMethod) { |
| 222 | case await: |
| 223 | c.await(); |
| 224 | break; |
| 225 | case awaitTimed: |
| 226 | assertTrue(c.await(timeoutMillis, MILLISECONDS)); |
| 227 | break; |
| 228 | case awaitNanos: |
| 229 | long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
| 230 | long nanosRemaining = c.awaitNanos(nanosTimeout); |
| 231 | assertTrue(nanosRemaining > 0); |
| 232 | break; |
| 233 | case awaitUntil: |
| 234 | assertTrue(c.awaitUntil(delayedDate(timeoutMillis))); |
| 235 | break; |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 236 | default: |
| 237 | throw new AssertionError(); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 238 | } |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * Checks that awaiting the given condition times out (using the |
| 243 | * default timeout duration). |
| 244 | */ |
| 245 | void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) { |
| 246 | long timeoutMillis = timeoutMillis(); |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 247 | long startTime; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 248 | try { |
| 249 | switch (awaitMethod) { |
| 250 | case awaitTimed: |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 251 | startTime = System.nanoTime(); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 252 | assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 253 | assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 254 | break; |
| 255 | case awaitNanos: |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 256 | startTime = System.nanoTime(); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 257 | long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
| 258 | long nanosRemaining = c.awaitNanos(nanosTimeout); |
| 259 | assertTrue(nanosRemaining <= 0); |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 260 | assertTrue(nanosRemaining > -MILLISECONDS.toNanos(LONG_DELAY_MS)); |
| 261 | assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 262 | break; |
| 263 | case awaitUntil: |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 264 | // We shouldn't assume that nanoTime and currentTimeMillis |
| 265 | // use the same time source, so don't use nanoTime here. |
| 266 | java.util.Date delayedDate = delayedDate(timeoutMillis()); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 267 | assertFalse(c.awaitUntil(delayedDate(timeoutMillis))); |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame] | 268 | assertTrue(new java.util.Date().getTime() >= delayedDate.getTime()); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 269 | break; |
| 270 | default: |
| 271 | throw new UnsupportedOperationException(); |
| 272 | } |
| 273 | } catch (InterruptedException ie) { threadUnexpectedException(ie); } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | /** |
| 277 | * isHeldExclusively is false upon construction |
| 278 | */ |
| 279 | public void testIsHeldExclusively() { |
| 280 | Mutex sync = new Mutex(); |
| 281 | assertFalse(sync.isHeldExclusively()); |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * acquiring released sync succeeds |
| 286 | */ |
| 287 | public void testAcquire() { |
| 288 | Mutex sync = new Mutex(); |
| 289 | sync.acquire(); |
| 290 | assertTrue(sync.isHeldExclusively()); |
| 291 | sync.release(); |
| 292 | assertFalse(sync.isHeldExclusively()); |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * tryAcquire on a released sync succeeds |
| 297 | */ |
| 298 | public void testTryAcquire() { |
| 299 | Mutex sync = new Mutex(); |
| 300 | assertTrue(sync.tryAcquire()); |
| 301 | assertTrue(sync.isHeldExclusively()); |
| 302 | sync.release(); |
| 303 | assertFalse(sync.isHeldExclusively()); |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * hasQueuedThreads reports whether there are waiting threads |
| 308 | */ |
| 309 | public void testHasQueuedThreads() { |
| 310 | final Mutex sync = new Mutex(); |
| 311 | assertFalse(sync.hasQueuedThreads()); |
| 312 | sync.acquire(); |
| 313 | Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
| 314 | waitForQueuedThread(sync, t1); |
| 315 | assertTrue(sync.hasQueuedThreads()); |
| 316 | Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
| 317 | waitForQueuedThread(sync, t2); |
| 318 | assertTrue(sync.hasQueuedThreads()); |
| 319 | t1.interrupt(); |
| 320 | awaitTermination(t1); |
| 321 | assertTrue(sync.hasQueuedThreads()); |
| 322 | sync.release(); |
| 323 | awaitTermination(t2); |
| 324 | assertFalse(sync.hasQueuedThreads()); |
| 325 | } |
| 326 | |
| 327 | /** |
| 328 | * isQueued(null) throws NullPointerException |
| 329 | */ |
| 330 | public void testIsQueuedNPE() { |
| 331 | final Mutex sync = new Mutex(); |
| 332 | try { |
| 333 | sync.isQueued(null); |
| 334 | shouldThrow(); |
| 335 | } catch (NullPointerException success) {} |
| 336 | } |
| 337 | |
| 338 | /** |
| 339 | * isQueued reports whether a thread is queued |
| 340 | */ |
| 341 | public void testIsQueued() { |
| 342 | final Mutex sync = new Mutex(); |
| 343 | Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
| 344 | Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
| 345 | assertFalse(sync.isQueued(t1)); |
| 346 | assertFalse(sync.isQueued(t2)); |
| 347 | sync.acquire(); |
| 348 | t1.start(); |
| 349 | waitForQueuedThread(sync, t1); |
| 350 | assertTrue(sync.isQueued(t1)); |
| 351 | assertFalse(sync.isQueued(t2)); |
| 352 | t2.start(); |
| 353 | waitForQueuedThread(sync, t2); |
| 354 | assertTrue(sync.isQueued(t1)); |
| 355 | assertTrue(sync.isQueued(t2)); |
| 356 | t1.interrupt(); |
| 357 | awaitTermination(t1); |
| 358 | assertFalse(sync.isQueued(t1)); |
| 359 | assertTrue(sync.isQueued(t2)); |
| 360 | sync.release(); |
| 361 | awaitTermination(t2); |
| 362 | assertFalse(sync.isQueued(t1)); |
| 363 | assertFalse(sync.isQueued(t2)); |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * getFirstQueuedThread returns first waiting thread or null if none |
| 368 | */ |
| 369 | public void testGetFirstQueuedThread() { |
| 370 | final Mutex sync = new Mutex(); |
| 371 | assertNull(sync.getFirstQueuedThread()); |
| 372 | sync.acquire(); |
| 373 | Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
| 374 | waitForQueuedThread(sync, t1); |
| 375 | assertEquals(t1, sync.getFirstQueuedThread()); |
| 376 | Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
| 377 | waitForQueuedThread(sync, t2); |
| 378 | assertEquals(t1, sync.getFirstQueuedThread()); |
| 379 | t1.interrupt(); |
| 380 | awaitTermination(t1); |
| 381 | assertEquals(t2, sync.getFirstQueuedThread()); |
| 382 | sync.release(); |
| 383 | awaitTermination(t2); |
| 384 | assertNull(sync.getFirstQueuedThread()); |
| 385 | } |
| 386 | |
| 387 | /** |
| 388 | * hasContended reports false if no thread has ever blocked, else true |
| 389 | */ |
| 390 | public void testHasContended() { |
| 391 | final Mutex sync = new Mutex(); |
| 392 | assertFalse(sync.hasContended()); |
| 393 | sync.acquire(); |
| 394 | assertFalse(sync.hasContended()); |
| 395 | Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
| 396 | waitForQueuedThread(sync, t1); |
| 397 | assertTrue(sync.hasContended()); |
| 398 | Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
| 399 | waitForQueuedThread(sync, t2); |
| 400 | assertTrue(sync.hasContended()); |
| 401 | t1.interrupt(); |
| 402 | awaitTermination(t1); |
| 403 | assertTrue(sync.hasContended()); |
| 404 | sync.release(); |
| 405 | awaitTermination(t2); |
| 406 | assertTrue(sync.hasContended()); |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * getQueuedThreads returns all waiting threads |
| 411 | */ |
| 412 | public void testGetQueuedThreads() { |
| 413 | final Mutex sync = new Mutex(); |
| 414 | Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
| 415 | Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
| 416 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 417 | sync.acquire(); |
| 418 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 419 | t1.start(); |
| 420 | waitForQueuedThread(sync, t1); |
| 421 | assertHasExclusiveQueuedThreads(sync, t1); |
| 422 | assertTrue(sync.getQueuedThreads().contains(t1)); |
| 423 | assertFalse(sync.getQueuedThreads().contains(t2)); |
| 424 | t2.start(); |
| 425 | waitForQueuedThread(sync, t2); |
| 426 | assertHasExclusiveQueuedThreads(sync, t1, t2); |
| 427 | assertTrue(sync.getQueuedThreads().contains(t1)); |
| 428 | assertTrue(sync.getQueuedThreads().contains(t2)); |
| 429 | t1.interrupt(); |
| 430 | awaitTermination(t1); |
| 431 | assertHasExclusiveQueuedThreads(sync, t2); |
| 432 | sync.release(); |
| 433 | awaitTermination(t2); |
| 434 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 435 | } |
| 436 | |
| 437 | /** |
| 438 | * getExclusiveQueuedThreads returns all exclusive waiting threads |
| 439 | */ |
| 440 | public void testGetExclusiveQueuedThreads() { |
| 441 | final Mutex sync = new Mutex(); |
| 442 | Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
| 443 | Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
| 444 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 445 | sync.acquire(); |
| 446 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 447 | t1.start(); |
| 448 | waitForQueuedThread(sync, t1); |
| 449 | assertHasExclusiveQueuedThreads(sync, t1); |
| 450 | assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
| 451 | assertFalse(sync.getExclusiveQueuedThreads().contains(t2)); |
| 452 | t2.start(); |
| 453 | waitForQueuedThread(sync, t2); |
| 454 | assertHasExclusiveQueuedThreads(sync, t1, t2); |
| 455 | assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
| 456 | assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
| 457 | t1.interrupt(); |
| 458 | awaitTermination(t1); |
| 459 | assertHasExclusiveQueuedThreads(sync, t2); |
| 460 | sync.release(); |
| 461 | awaitTermination(t2); |
| 462 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 463 | } |
| 464 | |
| 465 | /** |
| 466 | * getSharedQueuedThreads does not include exclusively waiting threads |
| 467 | */ |
| 468 | public void testGetSharedQueuedThreads_Exclusive() { |
| 469 | final Mutex sync = new Mutex(); |
| 470 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 471 | sync.acquire(); |
| 472 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 473 | Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
| 474 | waitForQueuedThread(sync, t1); |
| 475 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 476 | Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
| 477 | waitForQueuedThread(sync, t2); |
| 478 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 479 | t1.interrupt(); |
| 480 | awaitTermination(t1); |
| 481 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 482 | sync.release(); |
| 483 | awaitTermination(t2); |
| 484 | assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * getSharedQueuedThreads returns all shared waiting threads |
| 489 | */ |
| 490 | public void testGetSharedQueuedThreads_Shared() { |
| 491 | final BooleanLatch l = new BooleanLatch(); |
| 492 | assertHasSharedQueuedThreads(l, NO_THREADS); |
| 493 | Thread t1 = newStartedThread(new CheckedInterruptedRunnable() { |
| 494 | public void realRun() throws InterruptedException { |
| 495 | l.acquireSharedInterruptibly(0); |
| 496 | }}); |
| 497 | waitForQueuedThread(l, t1); |
| 498 | assertHasSharedQueuedThreads(l, t1); |
| 499 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 500 | public void realRun() throws InterruptedException { |
| 501 | l.acquireSharedInterruptibly(0); |
| 502 | }}); |
| 503 | waitForQueuedThread(l, t2); |
| 504 | assertHasSharedQueuedThreads(l, t1, t2); |
| 505 | t1.interrupt(); |
| 506 | awaitTermination(t1); |
| 507 | assertHasSharedQueuedThreads(l, t2); |
| 508 | assertTrue(l.releaseShared(0)); |
| 509 | awaitTermination(t2); |
| 510 | assertHasSharedQueuedThreads(l, NO_THREADS); |
| 511 | } |
| 512 | |
| 513 | /** |
| 514 | * tryAcquireNanos is interruptible |
| 515 | */ |
| 516 | public void testTryAcquireNanos_Interruptible() { |
| 517 | final Mutex sync = new Mutex(); |
| 518 | sync.acquire(); |
| 519 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 520 | public void realRun() throws InterruptedException { |
| 521 | sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS)); |
| 522 | }}); |
| 523 | |
| 524 | waitForQueuedThread(sync, t); |
| 525 | t.interrupt(); |
| 526 | awaitTermination(t); |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * tryAcquire on exclusively held sync fails |
| 531 | */ |
| 532 | public void testTryAcquireWhenSynced() { |
| 533 | final Mutex sync = new Mutex(); |
| 534 | sync.acquire(); |
| 535 | Thread t = newStartedThread(new CheckedRunnable() { |
| 536 | public void realRun() { |
| 537 | assertFalse(sync.tryAcquire()); |
| 538 | }}); |
| 539 | |
| 540 | awaitTermination(t); |
| 541 | sync.release(); |
| 542 | } |
| 543 | |
| 544 | /** |
| 545 | * tryAcquireNanos on an exclusively held sync times out |
| 546 | */ |
| 547 | public void testAcquireNanos_Timeout() { |
| 548 | final Mutex sync = new Mutex(); |
| 549 | sync.acquire(); |
| 550 | Thread t = newStartedThread(new CheckedRunnable() { |
| 551 | public void realRun() throws InterruptedException { |
| 552 | long startTime = System.nanoTime(); |
| 553 | long nanos = MILLISECONDS.toNanos(timeoutMillis()); |
| 554 | assertFalse(sync.tryAcquireNanos(nanos)); |
| 555 | assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
| 556 | }}); |
| 557 | |
| 558 | awaitTermination(t); |
| 559 | sync.release(); |
| 560 | } |
| 561 | |
| 562 | /** |
| 563 | * getState is true when acquired and false when not |
| 564 | */ |
| 565 | public void testGetState() { |
| 566 | final Mutex sync = new Mutex(); |
| 567 | sync.acquire(); |
| 568 | assertTrue(sync.isHeldExclusively()); |
| 569 | sync.release(); |
| 570 | assertFalse(sync.isHeldExclusively()); |
| 571 | |
| 572 | final BooleanLatch acquired = new BooleanLatch(); |
| 573 | final BooleanLatch done = new BooleanLatch(); |
| 574 | Thread t = newStartedThread(new CheckedRunnable() { |
| 575 | public void realRun() throws InterruptedException { |
| 576 | sync.acquire(); |
| 577 | assertTrue(acquired.releaseShared(0)); |
| 578 | done.acquireShared(0); |
| 579 | sync.release(); |
| 580 | }}); |
| 581 | |
| 582 | acquired.acquireShared(0); |
| 583 | assertTrue(sync.isHeldExclusively()); |
| 584 | assertTrue(done.releaseShared(0)); |
| 585 | awaitTermination(t); |
| 586 | assertFalse(sync.isHeldExclusively()); |
| 587 | } |
| 588 | |
| 589 | /** |
| 590 | * acquireInterruptibly succeeds when released, else is interruptible |
| 591 | */ |
| 592 | public void testAcquireInterruptibly() throws InterruptedException { |
| 593 | final Mutex sync = new Mutex(); |
| 594 | final BooleanLatch threadStarted = new BooleanLatch(); |
| 595 | sync.acquireInterruptibly(); |
| 596 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 597 | public void realRun() throws InterruptedException { |
| 598 | assertTrue(threadStarted.releaseShared(0)); |
| 599 | sync.acquireInterruptibly(); |
| 600 | }}); |
| 601 | |
| 602 | threadStarted.acquireShared(0); |
| 603 | waitForQueuedThread(sync, t); |
| 604 | t.interrupt(); |
| 605 | awaitTermination(t); |
| 606 | assertTrue(sync.isHeldExclusively()); |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * owns is true for a condition created by sync else false |
| 611 | */ |
| 612 | public void testOwns() { |
| 613 | final Mutex sync = new Mutex(); |
| 614 | final ConditionObject c = sync.newCondition(); |
| 615 | final Mutex sync2 = new Mutex(); |
| 616 | assertTrue(sync.owns(c)); |
| 617 | assertFalse(sync2.owns(c)); |
| 618 | } |
| 619 | |
| 620 | /** |
| 621 | * Calling await without holding sync throws IllegalMonitorStateException |
| 622 | */ |
| 623 | public void testAwait_IMSE() { |
| 624 | final Mutex sync = new Mutex(); |
| 625 | final ConditionObject c = sync.newCondition(); |
| 626 | for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
| 627 | long startTime = System.nanoTime(); |
| 628 | try { |
| 629 | await(c, awaitMethod); |
| 630 | shouldThrow(); |
| 631 | } catch (IllegalMonitorStateException success) { |
| 632 | } catch (InterruptedException e) { threadUnexpectedException(e); } |
| 633 | assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | /** |
| 638 | * Calling signal without holding sync throws IllegalMonitorStateException |
| 639 | */ |
| 640 | public void testSignal_IMSE() { |
| 641 | final Mutex sync = new Mutex(); |
| 642 | final ConditionObject c = sync.newCondition(); |
| 643 | try { |
| 644 | c.signal(); |
| 645 | shouldThrow(); |
| 646 | } catch (IllegalMonitorStateException success) {} |
| 647 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 648 | } |
| 649 | |
| 650 | /** |
| 651 | * Calling signalAll without holding sync throws IllegalMonitorStateException |
| 652 | */ |
| 653 | public void testSignalAll_IMSE() { |
| 654 | final Mutex sync = new Mutex(); |
| 655 | final ConditionObject c = sync.newCondition(); |
| 656 | try { |
| 657 | c.signalAll(); |
| 658 | shouldThrow(); |
| 659 | } catch (IllegalMonitorStateException success) {} |
| 660 | } |
| 661 | |
| 662 | /** |
| 663 | * await/awaitNanos/awaitUntil without a signal times out |
| 664 | */ |
| 665 | public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); } |
| 666 | public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); } |
| 667 | public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); } |
| 668 | public void testAwait_Timeout(AwaitMethod awaitMethod) { |
| 669 | final Mutex sync = new Mutex(); |
| 670 | final ConditionObject c = sync.newCondition(); |
| 671 | sync.acquire(); |
| 672 | assertAwaitTimesOut(c, awaitMethod); |
| 673 | sync.release(); |
| 674 | } |
| 675 | |
| 676 | /** |
| 677 | * await/awaitNanos/awaitUntil returns when signalled |
| 678 | */ |
| 679 | public void testSignal_await() { testSignal(AwaitMethod.await); } |
| 680 | public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); } |
| 681 | public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); } |
| 682 | public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); } |
| 683 | public void testSignal(final AwaitMethod awaitMethod) { |
| 684 | final Mutex sync = new Mutex(); |
| 685 | final ConditionObject c = sync.newCondition(); |
| 686 | final BooleanLatch acquired = new BooleanLatch(); |
| 687 | Thread t = newStartedThread(new CheckedRunnable() { |
| 688 | public void realRun() throws InterruptedException { |
| 689 | sync.acquire(); |
| 690 | assertTrue(acquired.releaseShared(0)); |
| 691 | await(c, awaitMethod); |
| 692 | sync.release(); |
| 693 | }}); |
| 694 | |
| 695 | acquired.acquireShared(0); |
| 696 | sync.acquire(); |
| 697 | assertHasWaitersLocked(sync, c, t); |
| 698 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 699 | c.signal(); |
| 700 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 701 | assertHasExclusiveQueuedThreads(sync, t); |
| 702 | sync.release(); |
| 703 | awaitTermination(t); |
| 704 | } |
| 705 | |
| 706 | /** |
| 707 | * hasWaiters(null) throws NullPointerException |
| 708 | */ |
| 709 | public void testHasWaitersNPE() { |
| 710 | final Mutex sync = new Mutex(); |
| 711 | try { |
| 712 | sync.hasWaiters(null); |
| 713 | shouldThrow(); |
| 714 | } catch (NullPointerException success) {} |
| 715 | } |
| 716 | |
| 717 | /** |
| 718 | * getWaitQueueLength(null) throws NullPointerException |
| 719 | */ |
| 720 | public void testGetWaitQueueLengthNPE() { |
| 721 | final Mutex sync = new Mutex(); |
| 722 | try { |
| 723 | sync.getWaitQueueLength(null); |
| 724 | shouldThrow(); |
| 725 | } catch (NullPointerException success) {} |
| 726 | } |
| 727 | |
| 728 | /** |
| 729 | * getWaitingThreads(null) throws NullPointerException |
| 730 | */ |
| 731 | public void testGetWaitingThreadsNPE() { |
| 732 | final Mutex sync = new Mutex(); |
| 733 | try { |
| 734 | sync.getWaitingThreads(null); |
| 735 | shouldThrow(); |
| 736 | } catch (NullPointerException success) {} |
| 737 | } |
| 738 | |
| 739 | /** |
| 740 | * hasWaiters throws IllegalArgumentException if not owned |
| 741 | */ |
| 742 | public void testHasWaitersIAE() { |
| 743 | final Mutex sync = new Mutex(); |
| 744 | final ConditionObject c = sync.newCondition(); |
| 745 | final Mutex sync2 = new Mutex(); |
| 746 | try { |
| 747 | sync2.hasWaiters(c); |
| 748 | shouldThrow(); |
| 749 | } catch (IllegalArgumentException success) {} |
| 750 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 751 | } |
| 752 | |
| 753 | /** |
| 754 | * hasWaiters throws IllegalMonitorStateException if not synced |
| 755 | */ |
| 756 | public void testHasWaitersIMSE() { |
| 757 | final Mutex sync = new Mutex(); |
| 758 | final ConditionObject c = sync.newCondition(); |
| 759 | try { |
| 760 | sync.hasWaiters(c); |
| 761 | shouldThrow(); |
| 762 | } catch (IllegalMonitorStateException success) {} |
| 763 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 764 | } |
| 765 | |
| 766 | /** |
| 767 | * getWaitQueueLength throws IllegalArgumentException if not owned |
| 768 | */ |
| 769 | public void testGetWaitQueueLengthIAE() { |
| 770 | final Mutex sync = new Mutex(); |
| 771 | final ConditionObject c = sync.newCondition(); |
| 772 | final Mutex sync2 = new Mutex(); |
| 773 | try { |
| 774 | sync2.getWaitQueueLength(c); |
| 775 | shouldThrow(); |
| 776 | } catch (IllegalArgumentException success) {} |
| 777 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 778 | } |
| 779 | |
| 780 | /** |
| 781 | * getWaitQueueLength throws IllegalMonitorStateException if not synced |
| 782 | */ |
| 783 | public void testGetWaitQueueLengthIMSE() { |
| 784 | final Mutex sync = new Mutex(); |
| 785 | final ConditionObject c = sync.newCondition(); |
| 786 | try { |
| 787 | sync.getWaitQueueLength(c); |
| 788 | shouldThrow(); |
| 789 | } catch (IllegalMonitorStateException success) {} |
| 790 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 791 | } |
| 792 | |
| 793 | /** |
| 794 | * getWaitingThreads throws IllegalArgumentException if not owned |
| 795 | */ |
| 796 | public void testGetWaitingThreadsIAE() { |
| 797 | final Mutex sync = new Mutex(); |
| 798 | final ConditionObject c = sync.newCondition(); |
| 799 | final Mutex sync2 = new Mutex(); |
| 800 | try { |
| 801 | sync2.getWaitingThreads(c); |
| 802 | shouldThrow(); |
| 803 | } catch (IllegalArgumentException success) {} |
| 804 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 805 | } |
| 806 | |
| 807 | /** |
| 808 | * getWaitingThreads throws IllegalMonitorStateException if not synced |
| 809 | */ |
| 810 | public void testGetWaitingThreadsIMSE() { |
| 811 | final Mutex sync = new Mutex(); |
| 812 | final ConditionObject c = sync.newCondition(); |
| 813 | try { |
| 814 | sync.getWaitingThreads(c); |
| 815 | shouldThrow(); |
| 816 | } catch (IllegalMonitorStateException success) {} |
| 817 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 818 | } |
| 819 | |
| 820 | /** |
| 821 | * hasWaiters returns true when a thread is waiting, else false |
| 822 | */ |
| 823 | public void testHasWaiters() { |
| 824 | final Mutex sync = new Mutex(); |
| 825 | final ConditionObject c = sync.newCondition(); |
| 826 | final BooleanLatch acquired = new BooleanLatch(); |
| 827 | Thread t = newStartedThread(new CheckedRunnable() { |
| 828 | public void realRun() throws InterruptedException { |
| 829 | sync.acquire(); |
| 830 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 831 | assertFalse(sync.hasWaiters(c)); |
| 832 | assertTrue(acquired.releaseShared(0)); |
| 833 | c.await(); |
| 834 | sync.release(); |
| 835 | }}); |
| 836 | |
| 837 | acquired.acquireShared(0); |
| 838 | sync.acquire(); |
| 839 | assertHasWaitersLocked(sync, c, t); |
| 840 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 841 | assertTrue(sync.hasWaiters(c)); |
| 842 | c.signal(); |
| 843 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 844 | assertHasExclusiveQueuedThreads(sync, t); |
| 845 | assertFalse(sync.hasWaiters(c)); |
| 846 | sync.release(); |
| 847 | |
| 848 | awaitTermination(t); |
| 849 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 850 | } |
| 851 | |
| 852 | /** |
| 853 | * getWaitQueueLength returns number of waiting threads |
| 854 | */ |
| 855 | public void testGetWaitQueueLength() { |
| 856 | final Mutex sync = new Mutex(); |
| 857 | final ConditionObject c = sync.newCondition(); |
| 858 | final BooleanLatch acquired1 = new BooleanLatch(); |
| 859 | final BooleanLatch acquired2 = new BooleanLatch(); |
| 860 | final Thread t1 = newStartedThread(new CheckedRunnable() { |
| 861 | public void realRun() throws InterruptedException { |
| 862 | sync.acquire(); |
| 863 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 864 | assertEquals(0, sync.getWaitQueueLength(c)); |
| 865 | assertTrue(acquired1.releaseShared(0)); |
| 866 | c.await(); |
| 867 | sync.release(); |
| 868 | }}); |
| 869 | acquired1.acquireShared(0); |
| 870 | sync.acquire(); |
| 871 | assertHasWaitersLocked(sync, c, t1); |
| 872 | assertEquals(1, sync.getWaitQueueLength(c)); |
| 873 | sync.release(); |
| 874 | |
| 875 | final Thread t2 = newStartedThread(new CheckedRunnable() { |
| 876 | public void realRun() throws InterruptedException { |
| 877 | sync.acquire(); |
| 878 | assertHasWaitersLocked(sync, c, t1); |
| 879 | assertEquals(1, sync.getWaitQueueLength(c)); |
| 880 | assertTrue(acquired2.releaseShared(0)); |
| 881 | c.await(); |
| 882 | sync.release(); |
| 883 | }}); |
| 884 | acquired2.acquireShared(0); |
| 885 | sync.acquire(); |
| 886 | assertHasWaitersLocked(sync, c, t1, t2); |
| 887 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 888 | assertEquals(2, sync.getWaitQueueLength(c)); |
| 889 | c.signalAll(); |
| 890 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 891 | assertHasExclusiveQueuedThreads(sync, t1, t2); |
| 892 | assertEquals(0, sync.getWaitQueueLength(c)); |
| 893 | sync.release(); |
| 894 | |
| 895 | awaitTermination(t1); |
| 896 | awaitTermination(t2); |
| 897 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 898 | } |
| 899 | |
| 900 | /** |
| 901 | * getWaitingThreads returns only and all waiting threads |
| 902 | */ |
| 903 | public void testGetWaitingThreads() { |
| 904 | final Mutex sync = new Mutex(); |
| 905 | final ConditionObject c = sync.newCondition(); |
| 906 | final BooleanLatch acquired1 = new BooleanLatch(); |
| 907 | final BooleanLatch acquired2 = new BooleanLatch(); |
| 908 | final Thread t1 = new Thread(new CheckedRunnable() { |
| 909 | public void realRun() throws InterruptedException { |
| 910 | sync.acquire(); |
| 911 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 912 | assertTrue(sync.getWaitingThreads(c).isEmpty()); |
| 913 | assertTrue(acquired1.releaseShared(0)); |
| 914 | c.await(); |
| 915 | sync.release(); |
| 916 | }}); |
| 917 | |
| 918 | final Thread t2 = new Thread(new CheckedRunnable() { |
| 919 | public void realRun() throws InterruptedException { |
| 920 | sync.acquire(); |
| 921 | assertHasWaitersLocked(sync, c, t1); |
| 922 | assertTrue(sync.getWaitingThreads(c).contains(t1)); |
| 923 | assertFalse(sync.getWaitingThreads(c).isEmpty()); |
| 924 | assertEquals(1, sync.getWaitingThreads(c).size()); |
| 925 | assertTrue(acquired2.releaseShared(0)); |
| 926 | c.await(); |
| 927 | sync.release(); |
| 928 | }}); |
| 929 | |
| 930 | sync.acquire(); |
| 931 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 932 | assertFalse(sync.getWaitingThreads(c).contains(t1)); |
| 933 | assertFalse(sync.getWaitingThreads(c).contains(t2)); |
| 934 | assertTrue(sync.getWaitingThreads(c).isEmpty()); |
| 935 | assertEquals(0, sync.getWaitingThreads(c).size()); |
| 936 | sync.release(); |
| 937 | |
| 938 | t1.start(); |
| 939 | acquired1.acquireShared(0); |
| 940 | sync.acquire(); |
| 941 | assertHasWaitersLocked(sync, c, t1); |
| 942 | assertTrue(sync.getWaitingThreads(c).contains(t1)); |
| 943 | assertFalse(sync.getWaitingThreads(c).contains(t2)); |
| 944 | assertFalse(sync.getWaitingThreads(c).isEmpty()); |
| 945 | assertEquals(1, sync.getWaitingThreads(c).size()); |
| 946 | sync.release(); |
| 947 | |
| 948 | t2.start(); |
| 949 | acquired2.acquireShared(0); |
| 950 | sync.acquire(); |
| 951 | assertHasWaitersLocked(sync, c, t1, t2); |
| 952 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 953 | assertTrue(sync.getWaitingThreads(c).contains(t1)); |
| 954 | assertTrue(sync.getWaitingThreads(c).contains(t2)); |
| 955 | assertFalse(sync.getWaitingThreads(c).isEmpty()); |
| 956 | assertEquals(2, sync.getWaitingThreads(c).size()); |
| 957 | c.signalAll(); |
| 958 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 959 | assertHasExclusiveQueuedThreads(sync, t1, t2); |
| 960 | assertFalse(sync.getWaitingThreads(c).contains(t1)); |
| 961 | assertFalse(sync.getWaitingThreads(c).contains(t2)); |
| 962 | assertTrue(sync.getWaitingThreads(c).isEmpty()); |
| 963 | assertEquals(0, sync.getWaitingThreads(c).size()); |
| 964 | sync.release(); |
| 965 | |
| 966 | awaitTermination(t1); |
| 967 | awaitTermination(t2); |
| 968 | assertHasWaitersUnlocked(sync, c, NO_THREADS); |
| 969 | } |
| 970 | |
| 971 | /** |
| 972 | * awaitUninterruptibly is uninterruptible |
| 973 | */ |
| 974 | public void testAwaitUninterruptibly() { |
| 975 | final Mutex sync = new Mutex(); |
| 976 | final ConditionObject c = sync.newCondition(); |
| 977 | final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
| 978 | Thread t = newStartedThread(new CheckedRunnable() { |
| 979 | public void realRun() { |
| 980 | sync.acquire(); |
| 981 | assertTrue(pleaseInterrupt.releaseShared(0)); |
| 982 | c.awaitUninterruptibly(); |
| 983 | assertTrue(Thread.interrupted()); |
| 984 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 985 | sync.release(); |
| 986 | }}); |
| 987 | |
| 988 | pleaseInterrupt.acquireShared(0); |
| 989 | sync.acquire(); |
| 990 | assertHasWaitersLocked(sync, c, t); |
| 991 | sync.release(); |
| 992 | t.interrupt(); |
| 993 | assertHasWaitersUnlocked(sync, c, t); |
| 994 | assertThreadStaysAlive(t); |
| 995 | sync.acquire(); |
| 996 | assertHasWaitersLocked(sync, c, t); |
| 997 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 998 | c.signal(); |
| 999 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 1000 | assertHasExclusiveQueuedThreads(sync, t); |
| 1001 | sync.release(); |
| 1002 | awaitTermination(t); |
| 1003 | } |
| 1004 | |
| 1005 | /** |
| 1006 | * await/awaitNanos/awaitUntil is interruptible |
| 1007 | */ |
| 1008 | public void testInterruptible_await() { testInterruptible(AwaitMethod.await); } |
| 1009 | public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); } |
| 1010 | public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); } |
| 1011 | public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); } |
| 1012 | public void testInterruptible(final AwaitMethod awaitMethod) { |
| 1013 | final Mutex sync = new Mutex(); |
| 1014 | final ConditionObject c = sync.newCondition(); |
| 1015 | final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
| 1016 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 1017 | public void realRun() throws InterruptedException { |
| 1018 | sync.acquire(); |
| 1019 | assertTrue(pleaseInterrupt.releaseShared(0)); |
| 1020 | await(c, awaitMethod); |
| 1021 | }}); |
| 1022 | |
| 1023 | pleaseInterrupt.acquireShared(0); |
| 1024 | t.interrupt(); |
| 1025 | awaitTermination(t); |
| 1026 | } |
| 1027 | |
| 1028 | /** |
| 1029 | * signalAll wakes up all threads |
| 1030 | */ |
| 1031 | public void testSignalAll_await() { testSignalAll(AwaitMethod.await); } |
| 1032 | public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); } |
| 1033 | public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); } |
| 1034 | public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); } |
| 1035 | public void testSignalAll(final AwaitMethod awaitMethod) { |
| 1036 | final Mutex sync = new Mutex(); |
| 1037 | final ConditionObject c = sync.newCondition(); |
| 1038 | final BooleanLatch acquired1 = new BooleanLatch(); |
| 1039 | final BooleanLatch acquired2 = new BooleanLatch(); |
| 1040 | Thread t1 = newStartedThread(new CheckedRunnable() { |
| 1041 | public void realRun() throws InterruptedException { |
| 1042 | sync.acquire(); |
| 1043 | acquired1.releaseShared(0); |
| 1044 | await(c, awaitMethod); |
| 1045 | sync.release(); |
| 1046 | }}); |
| 1047 | |
| 1048 | Thread t2 = newStartedThread(new CheckedRunnable() { |
| 1049 | public void realRun() throws InterruptedException { |
| 1050 | sync.acquire(); |
| 1051 | acquired2.releaseShared(0); |
| 1052 | await(c, awaitMethod); |
| 1053 | sync.release(); |
| 1054 | }}); |
| 1055 | |
| 1056 | acquired1.acquireShared(0); |
| 1057 | acquired2.acquireShared(0); |
| 1058 | sync.acquire(); |
| 1059 | assertHasWaitersLocked(sync, c, t1, t2); |
| 1060 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 1061 | c.signalAll(); |
| 1062 | assertHasWaitersLocked(sync, c, NO_THREADS); |
| 1063 | assertHasExclusiveQueuedThreads(sync, t1, t2); |
| 1064 | sync.release(); |
| 1065 | awaitTermination(t1); |
| 1066 | awaitTermination(t2); |
| 1067 | } |
| 1068 | |
| 1069 | /** |
| 1070 | * toString indicates current state |
| 1071 | */ |
| 1072 | public void testToString() { |
| 1073 | Mutex sync = new Mutex(); |
| 1074 | assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED)); |
| 1075 | sync.acquire(); |
| 1076 | assertTrue(sync.toString().contains("State = " + Mutex.LOCKED)); |
| 1077 | } |
| 1078 | |
| 1079 | /** |
| 1080 | * A serialized AQS deserializes with current state, but no queued threads |
| 1081 | */ |
| 1082 | public void testSerialization() { |
| 1083 | Mutex sync = new Mutex(); |
| 1084 | assertFalse(serialClone(sync).isHeldExclusively()); |
| 1085 | sync.acquire(); |
| 1086 | Thread t = newStartedThread(new InterruptedSyncRunnable(sync)); |
| 1087 | waitForQueuedThread(sync, t); |
| 1088 | assertTrue(sync.isHeldExclusively()); |
| 1089 | |
| 1090 | Mutex clone = serialClone(sync); |
| 1091 | assertTrue(clone.isHeldExclusively()); |
| 1092 | assertHasExclusiveQueuedThreads(sync, t); |
| 1093 | assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
| 1094 | t.interrupt(); |
| 1095 | awaitTermination(t); |
| 1096 | sync.release(); |
| 1097 | assertFalse(sync.isHeldExclusively()); |
| 1098 | assertTrue(clone.isHeldExclusively()); |
| 1099 | assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
| 1100 | assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
| 1101 | } |
| 1102 | |
| 1103 | /** |
| 1104 | * tryReleaseShared setting state changes getState |
| 1105 | */ |
| 1106 | public void testGetStateWithReleaseShared() { |
| 1107 | final BooleanLatch l = new BooleanLatch(); |
| 1108 | assertFalse(l.isSignalled()); |
| 1109 | assertTrue(l.releaseShared(0)); |
| 1110 | assertTrue(l.isSignalled()); |
| 1111 | } |
| 1112 | |
| 1113 | /** |
| 1114 | * releaseShared has no effect when already signalled |
| 1115 | */ |
| 1116 | public void testReleaseShared() { |
| 1117 | final BooleanLatch l = new BooleanLatch(); |
| 1118 | assertFalse(l.isSignalled()); |
| 1119 | assertTrue(l.releaseShared(0)); |
| 1120 | assertTrue(l.isSignalled()); |
| 1121 | assertTrue(l.releaseShared(0)); |
| 1122 | assertTrue(l.isSignalled()); |
| 1123 | } |
| 1124 | |
| 1125 | /** |
| 1126 | * acquireSharedInterruptibly returns after release, but not before |
| 1127 | */ |
| 1128 | public void testAcquireSharedInterruptibly() { |
| 1129 | final BooleanLatch l = new BooleanLatch(); |
| 1130 | |
| 1131 | Thread t = newStartedThread(new CheckedRunnable() { |
| 1132 | public void realRun() throws InterruptedException { |
| 1133 | assertFalse(l.isSignalled()); |
| 1134 | l.acquireSharedInterruptibly(0); |
| 1135 | assertTrue(l.isSignalled()); |
| 1136 | l.acquireSharedInterruptibly(0); |
| 1137 | assertTrue(l.isSignalled()); |
| 1138 | }}); |
| 1139 | |
| 1140 | waitForQueuedThread(l, t); |
| 1141 | assertFalse(l.isSignalled()); |
| 1142 | assertThreadStaysAlive(t); |
| 1143 | assertHasSharedQueuedThreads(l, t); |
| 1144 | assertTrue(l.releaseShared(0)); |
| 1145 | assertTrue(l.isSignalled()); |
| 1146 | awaitTermination(t); |
| 1147 | } |
| 1148 | |
| 1149 | /** |
| 1150 | * tryAcquireSharedNanos returns after release, but not before |
| 1151 | */ |
| 1152 | public void testTryAcquireSharedNanos() { |
| 1153 | final BooleanLatch l = new BooleanLatch(); |
| 1154 | |
| 1155 | Thread t = newStartedThread(new CheckedRunnable() { |
| 1156 | public void realRun() throws InterruptedException { |
| 1157 | assertFalse(l.isSignalled()); |
| 1158 | long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
| 1159 | assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
| 1160 | assertTrue(l.isSignalled()); |
| 1161 | assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
| 1162 | assertTrue(l.isSignalled()); |
| 1163 | }}); |
| 1164 | |
| 1165 | waitForQueuedThread(l, t); |
| 1166 | assertFalse(l.isSignalled()); |
| 1167 | assertThreadStaysAlive(t); |
| 1168 | assertTrue(l.releaseShared(0)); |
| 1169 | assertTrue(l.isSignalled()); |
| 1170 | awaitTermination(t); |
| 1171 | } |
| 1172 | |
| 1173 | /** |
| 1174 | * acquireSharedInterruptibly is interruptible |
| 1175 | */ |
| 1176 | public void testAcquireSharedInterruptibly_Interruptible() { |
| 1177 | final BooleanLatch l = new BooleanLatch(); |
| 1178 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 1179 | public void realRun() throws InterruptedException { |
| 1180 | assertFalse(l.isSignalled()); |
| 1181 | l.acquireSharedInterruptibly(0); |
| 1182 | }}); |
| 1183 | |
| 1184 | waitForQueuedThread(l, t); |
| 1185 | assertFalse(l.isSignalled()); |
| 1186 | t.interrupt(); |
| 1187 | awaitTermination(t); |
| 1188 | assertFalse(l.isSignalled()); |
| 1189 | } |
| 1190 | |
| 1191 | /** |
| 1192 | * tryAcquireSharedNanos is interruptible |
| 1193 | */ |
| 1194 | public void testTryAcquireSharedNanos_Interruptible() { |
| 1195 | final BooleanLatch l = new BooleanLatch(); |
| 1196 | Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
| 1197 | public void realRun() throws InterruptedException { |
| 1198 | assertFalse(l.isSignalled()); |
| 1199 | long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
| 1200 | l.tryAcquireSharedNanos(0, nanos); |
| 1201 | }}); |
| 1202 | |
| 1203 | waitForQueuedThread(l, t); |
| 1204 | assertFalse(l.isSignalled()); |
| 1205 | t.interrupt(); |
| 1206 | awaitTermination(t); |
| 1207 | assertFalse(l.isSignalled()); |
| 1208 | } |
| 1209 | |
| 1210 | /** |
| 1211 | * tryAcquireSharedNanos times out if not released before timeout |
| 1212 | */ |
| 1213 | public void testTryAcquireSharedNanos_Timeout() { |
| 1214 | final BooleanLatch l = new BooleanLatch(); |
| 1215 | final BooleanLatch observedQueued = new BooleanLatch(); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 1216 | Thread t = newStartedThread(new CheckedRunnable() { |
| 1217 | public void realRun() throws InterruptedException { |
| 1218 | assertFalse(l.isSignalled()); |
| 1219 | for (long millis = timeoutMillis(); |
| 1220 | !observedQueued.isSignalled(); |
| 1221 | millis *= 2) { |
| 1222 | long nanos = MILLISECONDS.toNanos(millis); |
| 1223 | long startTime = System.nanoTime(); |
| 1224 | assertFalse(l.tryAcquireSharedNanos(0, nanos)); |
| 1225 | assertTrue(millisElapsedSince(startTime) >= millis); |
| 1226 | } |
| 1227 | assertFalse(l.isSignalled()); |
| 1228 | }}); |
| 1229 | |
| 1230 | waitForQueuedThread(l, t); |
| 1231 | observedQueued.releaseShared(0); |
| 1232 | assertFalse(l.isSignalled()); |
| 1233 | awaitTermination(t); |
| 1234 | assertFalse(l.isSignalled()); |
| 1235 | } |
| 1236 | |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 1237 | /** |
| 1238 | * awaitNanos/timed await with 0 wait times out immediately |
| 1239 | */ |
| 1240 | public void testAwait_Zero() throws InterruptedException { |
| 1241 | final Mutex sync = new Mutex(); |
| 1242 | final ConditionObject c = sync.newCondition(); |
| 1243 | sync.acquire(); |
| 1244 | assertTrue(c.awaitNanos(0L) <= 0); |
| 1245 | assertFalse(c.await(0L, NANOSECONDS)); |
| 1246 | sync.release(); |
| 1247 | } |
| 1248 | |
| 1249 | /** |
| 1250 | * awaitNanos/timed await with maximum negative wait times does not underflow |
| 1251 | */ |
| 1252 | public void testAwait_NegativeInfinity() throws InterruptedException { |
| 1253 | final Mutex sync = new Mutex(); |
| 1254 | final ConditionObject c = sync.newCondition(); |
| 1255 | sync.acquire(); |
| 1256 | assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0); |
| 1257 | assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS)); |
| 1258 | sync.release(); |
| 1259 | } |
| 1260 | |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 1261 | } |