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 java.util.concurrent.atomic.AtomicIntegerFieldUpdater; |
| 12 | |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 13 | import junit.framework.Test; |
| 14 | import junit.framework.TestSuite; |
| 15 | |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 16 | public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase { |
| 17 | volatile int x = 0; |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame^] | 18 | protected volatile int protectedField; |
| 19 | private volatile int privateField; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 20 | int w; |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame^] | 21 | float z; |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 22 | // android-note: Removed because the CTS runner does a bad job of |
| 23 | // retrying tests that have suite() declarations. |
| 24 | // |
| 25 | // public static void main(String[] args) { |
| 26 | // main(suite(), args); |
| 27 | // } |
| 28 | // public static Test suite() { |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame^] | 29 | // return new TestSuite(AtomicIntegerFieldUpdaterTest.class); |
| 30 | // } |
| 31 | |
| 32 | // for testing subclass access |
| 33 | // android-note: Removed because android doesn't restrict reflection access |
| 34 | // static class AtomicIntegerFieldUpdaterTestSubclass extends AtomicIntegerFieldUpdaterTest { |
| 35 | // public void checkPrivateAccess() { |
| 36 | // try { |
| 37 | // AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = |
| 38 | // AtomicIntegerFieldUpdater.newUpdater |
| 39 | // (AtomicIntegerFieldUpdaterTest.class, "privateField"); |
| 40 | // shouldThrow(); |
| 41 | // } catch (RuntimeException success) { |
| 42 | // assertNotNull(success.getCause()); |
| 43 | // } |
| 44 | // } |
| 45 | |
| 46 | // public void checkCompareAndSetProtectedSub() { |
| 47 | // AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = |
| 48 | // AtomicIntegerFieldUpdater.newUpdater |
| 49 | // (AtomicIntegerFieldUpdaterTest.class, "protectedField"); |
| 50 | // this.protectedField = 1; |
| 51 | // assertTrue(a.compareAndSet(this, 1, 2)); |
| 52 | // assertTrue(a.compareAndSet(this, 2, -4)); |
| 53 | // assertEquals(-4, a.get(this)); |
| 54 | // assertFalse(a.compareAndSet(this, -5, 7)); |
| 55 | // assertEquals(-4, a.get(this)); |
| 56 | // assertTrue(a.compareAndSet(this, -4, 7)); |
| 57 | // assertEquals(7, a.get(this)); |
| 58 | // } |
| 59 | // } |
| 60 | |
| 61 | // static class UnrelatedClass { |
| 62 | // public void checkPackageAccess(AtomicIntegerFieldUpdaterTest obj) { |
| 63 | // obj.x = 72; |
| 64 | // AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = |
| 65 | // AtomicIntegerFieldUpdater.newUpdater |
| 66 | // (AtomicIntegerFieldUpdaterTest.class, "x"); |
| 67 | // assertEquals(72, a.get(obj)); |
| 68 | // assertTrue(a.compareAndSet(obj, 72, 73)); |
| 69 | // assertEquals(73, a.get(obj)); |
| 70 | // } |
| 71 | |
| 72 | // public void checkPrivateAccess(AtomicIntegerFieldUpdaterTest obj) { |
| 73 | // try { |
| 74 | // AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = |
| 75 | // AtomicIntegerFieldUpdater.newUpdater |
| 76 | // (AtomicIntegerFieldUpdaterTest.class, "privateField"); |
| 77 | // throw new AssertionError("should throw"); |
| 78 | // } catch (RuntimeException success) { |
| 79 | // assertNotNull(success.getCause()); |
| 80 | // } |
| 81 | // } |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 82 | // } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 83 | |
| 84 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> updaterFor(String fieldName) { |
| 85 | return AtomicIntegerFieldUpdater.newUpdater |
| 86 | (AtomicIntegerFieldUpdaterTest.class, fieldName); |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Construction with non-existent field throws RuntimeException |
| 91 | */ |
| 92 | public void testConstructor() { |
| 93 | try { |
| 94 | updaterFor("y"); |
| 95 | shouldThrow(); |
| 96 | } catch (RuntimeException success) { |
| 97 | assertNotNull(success.getCause()); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * construction with field not of given type throws IllegalArgumentException |
| 103 | */ |
| 104 | public void testConstructor2() { |
| 105 | try { |
| 106 | updaterFor("z"); |
| 107 | shouldThrow(); |
| 108 | } catch (IllegalArgumentException success) {} |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * construction with non-volatile field throws IllegalArgumentException |
| 113 | */ |
| 114 | public void testConstructor3() { |
| 115 | try { |
| 116 | updaterFor("w"); |
| 117 | shouldThrow(); |
| 118 | } catch (IllegalArgumentException success) {} |
| 119 | } |
| 120 | |
| 121 | /** |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame^] | 122 | * construction using private field from subclass throws RuntimeException |
| 123 | */ |
| 124 | // android-note: Removed because android doesn't restrict reflection access |
| 125 | // public void testPrivateFieldInSubclass() { |
| 126 | // AtomicIntegerFieldUpdaterTestSubclass s = |
| 127 | // new AtomicIntegerFieldUpdaterTestSubclass(); |
| 128 | // s.checkPrivateAccess(); |
| 129 | // } |
| 130 | |
| 131 | /** |
| 132 | * construction from unrelated class; package access is allowed, |
| 133 | * private access is not |
| 134 | */ |
| 135 | // android-note: Removed because android doesn't restrict reflection access |
| 136 | // public void testUnrelatedClassAccess() { |
| 137 | // new UnrelatedClass().checkPackageAccess(this); |
| 138 | // new UnrelatedClass().checkPrivateAccess(this); |
| 139 | // } |
| 140 | |
| 141 | /** |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 142 | * get returns the last value set or assigned |
| 143 | */ |
| 144 | public void testGetSet() { |
| 145 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 146 | a = updaterFor("x"); |
| 147 | x = 1; |
| 148 | assertEquals(1, a.get(this)); |
| 149 | a.set(this, 2); |
| 150 | assertEquals(2, a.get(this)); |
| 151 | a.set(this, -3); |
| 152 | assertEquals(-3, a.get(this)); |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * get returns the last value lazySet by same thread |
| 157 | */ |
| 158 | public void testGetLazySet() { |
| 159 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 160 | a = updaterFor("x"); |
| 161 | x = 1; |
| 162 | assertEquals(1, a.get(this)); |
| 163 | a.lazySet(this, 2); |
| 164 | assertEquals(2, a.get(this)); |
| 165 | a.lazySet(this, -3); |
| 166 | assertEquals(-3, a.get(this)); |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * compareAndSet succeeds in changing value if equal to expected else fails |
| 171 | */ |
| 172 | public void testCompareAndSet() { |
| 173 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 174 | a = updaterFor("x"); |
| 175 | x = 1; |
| 176 | assertTrue(a.compareAndSet(this, 1, 2)); |
| 177 | assertTrue(a.compareAndSet(this, 2, -4)); |
| 178 | assertEquals(-4, a.get(this)); |
| 179 | assertFalse(a.compareAndSet(this, -5, 7)); |
| 180 | assertEquals(-4, a.get(this)); |
| 181 | assertTrue(a.compareAndSet(this, -4, 7)); |
| 182 | assertEquals(7, a.get(this)); |
| 183 | } |
| 184 | |
| 185 | /** |
Przemyslaw Szczepaniak | b8b7511 | 2016-03-11 15:59:10 +0000 | [diff] [blame^] | 186 | * compareAndSet succeeds in changing protected field value if |
| 187 | * equal to expected else fails |
| 188 | */ |
| 189 | public void testCompareAndSetProtected() { |
| 190 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 191 | a = updaterFor("protectedField"); |
| 192 | protectedField = 1; |
| 193 | assertTrue(a.compareAndSet(this, 1, 2)); |
| 194 | assertTrue(a.compareAndSet(this, 2, -4)); |
| 195 | assertEquals(-4, a.get(this)); |
| 196 | assertFalse(a.compareAndSet(this, -5, 7)); |
| 197 | assertEquals(-4, a.get(this)); |
| 198 | assertTrue(a.compareAndSet(this, -4, 7)); |
| 199 | assertEquals(7, a.get(this)); |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * compareAndSet succeeds in changing protected field value if |
| 204 | * equal to expected else fails |
| 205 | */ |
| 206 | // android-note: Removed because android doesn't restrict reflection access |
| 207 | // public void testCompareAndSetProtectedInSubclass() { |
| 208 | // AtomicIntegerFieldUpdaterTestSubclass s = |
| 209 | // new AtomicIntegerFieldUpdaterTestSubclass(); |
| 210 | // s.checkCompareAndSetProtectedSub(); |
| 211 | // } |
| 212 | |
| 213 | /** |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 214 | * compareAndSet in one thread enables another waiting for value |
| 215 | * to succeed |
| 216 | */ |
| 217 | public void testCompareAndSetInMultipleThreads() throws Exception { |
| 218 | x = 1; |
| 219 | final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 220 | a = updaterFor("x"); |
| 221 | |
| 222 | Thread t = new Thread(new CheckedRunnable() { |
| 223 | public void realRun() { |
| 224 | while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3)) |
| 225 | Thread.yield(); |
| 226 | }}); |
| 227 | |
| 228 | t.start(); |
| 229 | assertTrue(a.compareAndSet(this, 1, 2)); |
| 230 | t.join(LONG_DELAY_MS); |
| 231 | assertFalse(t.isAlive()); |
| 232 | assertEquals(3, a.get(this)); |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * repeated weakCompareAndSet succeeds in changing value when equal |
| 237 | * to expected |
| 238 | */ |
| 239 | public void testWeakCompareAndSet() { |
| 240 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 241 | a = updaterFor("x"); |
| 242 | x = 1; |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 243 | do {} while (!a.weakCompareAndSet(this, 1, 2)); |
| 244 | do {} while (!a.weakCompareAndSet(this, 2, -4)); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 245 | assertEquals(-4, a.get(this)); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 246 | do {} while (!a.weakCompareAndSet(this, -4, 7)); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 247 | assertEquals(7, a.get(this)); |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * getAndSet returns previous value and sets to given value |
| 252 | */ |
| 253 | public void testGetAndSet() { |
| 254 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 255 | a = updaterFor("x"); |
| 256 | x = 1; |
| 257 | assertEquals(1, a.getAndSet(this, 0)); |
| 258 | assertEquals(0, a.getAndSet(this, -10)); |
| 259 | assertEquals(-10, a.getAndSet(this, 1)); |
| 260 | } |
| 261 | |
| 262 | /** |
| 263 | * getAndAdd returns previous value and adds given value |
| 264 | */ |
| 265 | public void testGetAndAdd() { |
| 266 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 267 | a = updaterFor("x"); |
| 268 | x = 1; |
| 269 | assertEquals(1, a.getAndAdd(this, 2)); |
| 270 | assertEquals(3, a.get(this)); |
| 271 | assertEquals(3, a.getAndAdd(this, -4)); |
| 272 | assertEquals(-1, a.get(this)); |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * getAndDecrement returns previous value and decrements |
| 277 | */ |
| 278 | public void testGetAndDecrement() { |
| 279 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 280 | a = updaterFor("x"); |
| 281 | x = 1; |
| 282 | assertEquals(1, a.getAndDecrement(this)); |
| 283 | assertEquals(0, a.getAndDecrement(this)); |
| 284 | assertEquals(-1, a.getAndDecrement(this)); |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * getAndIncrement returns previous value and increments |
| 289 | */ |
| 290 | public void testGetAndIncrement() { |
| 291 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 292 | a = updaterFor("x"); |
| 293 | x = 1; |
| 294 | assertEquals(1, a.getAndIncrement(this)); |
| 295 | assertEquals(2, a.get(this)); |
| 296 | a.set(this, -2); |
| 297 | assertEquals(-2, a.getAndIncrement(this)); |
| 298 | assertEquals(-1, a.getAndIncrement(this)); |
| 299 | assertEquals(0, a.getAndIncrement(this)); |
| 300 | assertEquals(1, a.get(this)); |
| 301 | } |
| 302 | |
| 303 | /** |
| 304 | * addAndGet adds given value to current, and returns current value |
| 305 | */ |
| 306 | public void testAddAndGet() { |
| 307 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 308 | a = updaterFor("x"); |
| 309 | x = 1; |
| 310 | assertEquals(3, a.addAndGet(this, 2)); |
| 311 | assertEquals(3, a.get(this)); |
| 312 | assertEquals(-1, a.addAndGet(this, -4)); |
| 313 | assertEquals(-1, a.get(this)); |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * decrementAndGet decrements and returns current value |
| 318 | */ |
| 319 | public void testDecrementAndGet() { |
| 320 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 321 | a = updaterFor("x"); |
| 322 | x = 1; |
| 323 | assertEquals(0, a.decrementAndGet(this)); |
| 324 | assertEquals(-1, a.decrementAndGet(this)); |
| 325 | assertEquals(-2, a.decrementAndGet(this)); |
| 326 | assertEquals(-2, a.get(this)); |
| 327 | } |
| 328 | |
| 329 | /** |
| 330 | * incrementAndGet increments and returns current value |
| 331 | */ |
| 332 | public void testIncrementAndGet() { |
| 333 | AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
| 334 | a = updaterFor("x"); |
| 335 | x = 1; |
| 336 | assertEquals(2, a.incrementAndGet(this)); |
| 337 | assertEquals(2, a.get(this)); |
| 338 | a.set(this, -2); |
| 339 | assertEquals(-1, a.incrementAndGet(this)); |
| 340 | assertEquals(0, a.incrementAndGet(this)); |
| 341 | assertEquals(1, a.incrementAndGet(this)); |
| 342 | assertEquals(1, a.get(this)); |
| 343 | } |
| 344 | |
| 345 | } |