Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
Howard Hinnant | f5256e1 | 2010-05-11 21:36:01 +0000 | [diff] [blame] | 3 | // The LLVM Compiler Infrastructure |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 4 | // |
Howard Hinnant | b64f8b0 | 2010-11-16 22:09:02 +0000 | [diff] [blame] | 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
Jonathan Roelofs | 8d86b2e | 2014-09-05 19:45:05 +0000 | [diff] [blame] | 9 | // |
| 10 | // UNSUPPORTED: libcpp-has-no-threads |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 11 | |
| 12 | // <mutex> |
| 13 | |
| 14 | // template <class L1, class L2, class... L3> |
| 15 | // int try_lock(L1&, L2&, L3&...); |
| 16 | |
| 17 | #include <mutex> |
| 18 | #include <cassert> |
| 19 | |
| 20 | class L0 |
| 21 | { |
| 22 | bool locked_; |
| 23 | |
| 24 | public: |
| 25 | L0() : locked_(false) {} |
| 26 | |
| 27 | bool try_lock() |
| 28 | { |
| 29 | locked_ = true; |
| 30 | return locked_; |
| 31 | } |
| 32 | |
| 33 | void unlock() {locked_ = false;} |
| 34 | |
| 35 | bool locked() const {return locked_;} |
| 36 | }; |
| 37 | |
| 38 | class L1 |
| 39 | { |
| 40 | bool locked_; |
| 41 | |
| 42 | public: |
| 43 | L1() : locked_(false) {} |
| 44 | |
| 45 | bool try_lock() |
| 46 | { |
| 47 | locked_ = false; |
| 48 | return locked_; |
| 49 | } |
| 50 | |
| 51 | void unlock() {locked_ = false;} |
| 52 | |
| 53 | bool locked() const {return locked_;} |
| 54 | }; |
| 55 | |
| 56 | class L2 |
| 57 | { |
| 58 | bool locked_; |
| 59 | |
| 60 | public: |
| 61 | L2() : locked_(false) {} |
| 62 | |
| 63 | bool try_lock() |
| 64 | { |
| 65 | throw 1; |
| 66 | return locked_; |
| 67 | } |
| 68 | |
| 69 | void unlock() {locked_ = false;} |
| 70 | |
| 71 | bool locked() const {return locked_;} |
| 72 | }; |
| 73 | |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 74 | int main() |
| 75 | { |
| 76 | { |
| 77 | L0 l0; |
| 78 | L0 l1; |
| 79 | assert(std::try_lock(l0, l1) == -1); |
| 80 | assert(l0.locked()); |
| 81 | assert(l1.locked()); |
| 82 | } |
| 83 | { |
| 84 | L0 l0; |
| 85 | L1 l1; |
| 86 | assert(std::try_lock(l0, l1) == 1); |
| 87 | assert(!l0.locked()); |
| 88 | assert(!l1.locked()); |
| 89 | } |
| 90 | { |
| 91 | L1 l0; |
| 92 | L0 l1; |
| 93 | assert(std::try_lock(l0, l1) == 0); |
| 94 | assert(!l0.locked()); |
| 95 | assert(!l1.locked()); |
| 96 | } |
| 97 | { |
| 98 | L0 l0; |
| 99 | L2 l1; |
| 100 | try |
| 101 | { |
| 102 | std::try_lock(l0, l1); |
| 103 | assert(false); |
| 104 | } |
| 105 | catch (int) |
| 106 | { |
| 107 | assert(!l0.locked()); |
| 108 | assert(!l1.locked()); |
| 109 | } |
| 110 | } |
| 111 | { |
| 112 | L2 l0; |
| 113 | L0 l1; |
| 114 | try |
| 115 | { |
| 116 | std::try_lock(l0, l1); |
| 117 | assert(false); |
| 118 | } |
| 119 | catch (int) |
| 120 | { |
| 121 | assert(!l0.locked()); |
| 122 | assert(!l1.locked()); |
| 123 | } |
| 124 | } |
| 125 | #ifndef _LIBCPP_HAS_NO_VARIADICS |
| 126 | { |
| 127 | L0 l0; |
| 128 | L0 l1; |
| 129 | L0 l2; |
| 130 | assert(std::try_lock(l0, l1, l2) == -1); |
| 131 | assert(l0.locked()); |
| 132 | assert(l1.locked()); |
| 133 | assert(l2.locked()); |
| 134 | } |
| 135 | { |
| 136 | L1 l0; |
| 137 | L1 l1; |
| 138 | L1 l2; |
| 139 | assert(std::try_lock(l0, l1, l2) == 0); |
| 140 | assert(!l0.locked()); |
| 141 | assert(!l1.locked()); |
| 142 | assert(!l2.locked()); |
| 143 | } |
| 144 | { |
| 145 | L2 l0; |
| 146 | L2 l1; |
| 147 | L2 l2; |
| 148 | try |
| 149 | { |
| 150 | std::try_lock(l0, l1, l2); |
| 151 | assert(false); |
| 152 | } |
| 153 | catch (int) |
| 154 | { |
| 155 | assert(!l0.locked()); |
| 156 | assert(!l1.locked()); |
| 157 | assert(!l2.locked()); |
| 158 | } |
| 159 | } |
| 160 | { |
| 161 | L0 l0; |
| 162 | L1 l1; |
| 163 | L2 l2; |
| 164 | assert(std::try_lock(l0, l1, l2) == 1); |
| 165 | assert(!l0.locked()); |
| 166 | assert(!l1.locked()); |
| 167 | assert(!l2.locked()); |
| 168 | } |
| 169 | { |
| 170 | L0 l0; |
| 171 | L0 l1; |
| 172 | L1 l2; |
| 173 | assert(std::try_lock(l0, l1, l2) == 2); |
| 174 | assert(!l0.locked()); |
| 175 | assert(!l1.locked()); |
| 176 | assert(!l2.locked()); |
| 177 | } |
| 178 | { |
| 179 | L0 l0; |
| 180 | L1 l1; |
| 181 | L0 l2; |
| 182 | assert(std::try_lock(l0, l1, l2) == 1); |
| 183 | assert(!l0.locked()); |
| 184 | assert(!l1.locked()); |
| 185 | assert(!l2.locked()); |
| 186 | } |
| 187 | { |
| 188 | L1 l0; |
| 189 | L0 l1; |
| 190 | L0 l2; |
| 191 | assert(std::try_lock(l0, l1, l2) == 0); |
| 192 | assert(!l0.locked()); |
| 193 | assert(!l1.locked()); |
| 194 | assert(!l2.locked()); |
| 195 | } |
| 196 | { |
| 197 | L0 l0; |
| 198 | L0 l1; |
| 199 | L2 l2; |
| 200 | try |
| 201 | { |
| 202 | std::try_lock(l0, l1, l2); |
| 203 | assert(false); |
| 204 | } |
| 205 | catch (int) |
| 206 | { |
| 207 | assert(!l0.locked()); |
| 208 | assert(!l1.locked()); |
| 209 | assert(!l2.locked()); |
| 210 | } |
| 211 | } |
| 212 | { |
| 213 | L0 l0; |
| 214 | L2 l1; |
| 215 | L0 l2; |
| 216 | try |
| 217 | { |
| 218 | std::try_lock(l0, l1, l2); |
| 219 | assert(false); |
| 220 | } |
| 221 | catch (int) |
| 222 | { |
| 223 | assert(!l0.locked()); |
| 224 | assert(!l1.locked()); |
| 225 | assert(!l2.locked()); |
| 226 | } |
| 227 | } |
| 228 | { |
| 229 | L2 l0; |
| 230 | L0 l1; |
| 231 | L0 l2; |
| 232 | try |
| 233 | { |
| 234 | std::try_lock(l0, l1, l2); |
| 235 | assert(false); |
| 236 | } |
| 237 | catch (int) |
| 238 | { |
| 239 | assert(!l0.locked()); |
| 240 | assert(!l1.locked()); |
| 241 | assert(!l2.locked()); |
| 242 | } |
| 243 | } |
| 244 | { |
| 245 | L1 l0; |
| 246 | L1 l1; |
| 247 | L0 l2; |
| 248 | assert(std::try_lock(l0, l1, l2) == 0); |
| 249 | assert(!l0.locked()); |
| 250 | assert(!l1.locked()); |
| 251 | assert(!l2.locked()); |
| 252 | } |
| 253 | { |
| 254 | L1 l0; |
| 255 | L0 l1; |
| 256 | L1 l2; |
| 257 | assert(std::try_lock(l0, l1, l2) == 0); |
| 258 | assert(!l0.locked()); |
| 259 | assert(!l1.locked()); |
| 260 | assert(!l2.locked()); |
| 261 | } |
| 262 | { |
| 263 | L0 l0; |
| 264 | L1 l1; |
| 265 | L1 l2; |
| 266 | assert(std::try_lock(l0, l1, l2) == 1); |
| 267 | assert(!l0.locked()); |
| 268 | assert(!l1.locked()); |
| 269 | assert(!l2.locked()); |
| 270 | } |
| 271 | { |
| 272 | L1 l0; |
| 273 | L1 l1; |
| 274 | L2 l2; |
| 275 | assert(std::try_lock(l0, l1, l2) == 0); |
| 276 | assert(!l0.locked()); |
| 277 | assert(!l1.locked()); |
| 278 | assert(!l2.locked()); |
| 279 | } |
| 280 | { |
| 281 | L1 l0; |
| 282 | L2 l1; |
| 283 | L1 l2; |
| 284 | assert(std::try_lock(l0, l1, l2) == 0); |
| 285 | assert(!l0.locked()); |
| 286 | assert(!l1.locked()); |
| 287 | assert(!l2.locked()); |
| 288 | } |
| 289 | { |
| 290 | L2 l0; |
| 291 | L1 l1; |
| 292 | L1 l2; |
| 293 | try |
| 294 | { |
| 295 | std::try_lock(l0, l1, l2); |
| 296 | assert(false); |
| 297 | } |
| 298 | catch (int) |
| 299 | { |
| 300 | assert(!l0.locked()); |
| 301 | assert(!l1.locked()); |
| 302 | assert(!l2.locked()); |
| 303 | } |
| 304 | } |
| 305 | { |
| 306 | L2 l0; |
| 307 | L2 l1; |
| 308 | L0 l2; |
| 309 | try |
| 310 | { |
| 311 | std::try_lock(l0, l1, l2); |
| 312 | assert(false); |
| 313 | } |
| 314 | catch (int) |
| 315 | { |
| 316 | assert(!l0.locked()); |
| 317 | assert(!l1.locked()); |
| 318 | assert(!l2.locked()); |
| 319 | } |
| 320 | } |
| 321 | { |
| 322 | L2 l0; |
| 323 | L0 l1; |
| 324 | L2 l2; |
| 325 | try |
| 326 | { |
| 327 | std::try_lock(l0, l1, l2); |
| 328 | assert(false); |
| 329 | } |
| 330 | catch (int) |
| 331 | { |
| 332 | assert(!l0.locked()); |
| 333 | assert(!l1.locked()); |
| 334 | assert(!l2.locked()); |
| 335 | } |
| 336 | } |
| 337 | { |
| 338 | L0 l0; |
| 339 | L2 l1; |
| 340 | L2 l2; |
| 341 | try |
| 342 | { |
| 343 | std::try_lock(l0, l1, l2); |
| 344 | assert(false); |
| 345 | } |
| 346 | catch (int) |
| 347 | { |
| 348 | assert(!l0.locked()); |
| 349 | assert(!l1.locked()); |
| 350 | assert(!l2.locked()); |
| 351 | } |
| 352 | } |
| 353 | { |
| 354 | L2 l0; |
| 355 | L2 l1; |
| 356 | L1 l2; |
| 357 | try |
| 358 | { |
| 359 | std::try_lock(l0, l1, l2); |
| 360 | assert(false); |
| 361 | } |
| 362 | catch (int) |
| 363 | { |
| 364 | assert(!l0.locked()); |
| 365 | assert(!l1.locked()); |
| 366 | assert(!l2.locked()); |
| 367 | } |
| 368 | } |
| 369 | { |
| 370 | L2 l0; |
| 371 | L1 l1; |
| 372 | L2 l2; |
| 373 | try |
| 374 | { |
| 375 | std::try_lock(l0, l1, l2); |
| 376 | assert(false); |
| 377 | } |
| 378 | catch (int) |
| 379 | { |
| 380 | assert(!l0.locked()); |
| 381 | assert(!l1.locked()); |
| 382 | assert(!l2.locked()); |
| 383 | } |
| 384 | } |
| 385 | { |
| 386 | L1 l0; |
| 387 | L2 l1; |
| 388 | L2 l2; |
| 389 | assert(std::try_lock(l0, l1, l2) == 0); |
| 390 | assert(!l0.locked()); |
| 391 | assert(!l1.locked()); |
| 392 | assert(!l2.locked()); |
| 393 | } |
| 394 | { |
| 395 | L0 l0; |
| 396 | L2 l1; |
| 397 | L1 l2; |
| 398 | try |
| 399 | { |
| 400 | std::try_lock(l0, l1, l2); |
| 401 | assert(false); |
| 402 | } |
| 403 | catch (int) |
| 404 | { |
| 405 | assert(!l0.locked()); |
| 406 | assert(!l1.locked()); |
| 407 | assert(!l2.locked()); |
| 408 | } |
| 409 | } |
| 410 | { |
| 411 | L1 l0; |
| 412 | L0 l1; |
| 413 | L2 l2; |
| 414 | assert(std::try_lock(l0, l1, l2) == 0); |
| 415 | assert(!l0.locked()); |
| 416 | assert(!l1.locked()); |
| 417 | assert(!l2.locked()); |
| 418 | } |
| 419 | { |
| 420 | L1 l0; |
| 421 | L2 l1; |
| 422 | L0 l2; |
| 423 | assert(std::try_lock(l0, l1, l2) == 0); |
| 424 | assert(!l0.locked()); |
| 425 | assert(!l1.locked()); |
| 426 | assert(!l2.locked()); |
| 427 | } |
| 428 | { |
| 429 | L2 l0; |
| 430 | L0 l1; |
| 431 | L1 l2; |
| 432 | try |
| 433 | { |
| 434 | std::try_lock(l0, l1, l2); |
| 435 | assert(false); |
| 436 | } |
| 437 | catch (int) |
| 438 | { |
| 439 | assert(!l0.locked()); |
| 440 | assert(!l1.locked()); |
| 441 | assert(!l2.locked()); |
| 442 | } |
| 443 | } |
| 444 | { |
| 445 | L2 l0; |
| 446 | L1 l1; |
| 447 | L0 l2; |
| 448 | try |
| 449 | { |
| 450 | std::try_lock(l0, l1, l2); |
| 451 | assert(false); |
| 452 | } |
| 453 | catch (int) |
| 454 | { |
| 455 | assert(!l0.locked()); |
| 456 | assert(!l1.locked()); |
| 457 | assert(!l2.locked()); |
| 458 | } |
| 459 | } |
| 460 | { |
| 461 | L0 l0; |
| 462 | L0 l1; |
| 463 | L0 l2; |
| 464 | L0 l3; |
| 465 | assert(std::try_lock(l0, l1, l2, l3) == -1); |
| 466 | assert(l0.locked()); |
| 467 | assert(l1.locked()); |
| 468 | assert(l2.locked()); |
| 469 | assert(l3.locked()); |
| 470 | } |
| 471 | { |
| 472 | L1 l0; |
| 473 | L0 l1; |
| 474 | L0 l2; |
| 475 | L0 l3; |
| 476 | assert(std::try_lock(l0, l1, l2, l3) == 0); |
| 477 | assert(!l0.locked()); |
| 478 | assert(!l1.locked()); |
| 479 | assert(!l2.locked()); |
| 480 | assert(!l3.locked()); |
| 481 | } |
| 482 | { |
| 483 | L0 l0; |
| 484 | L1 l1; |
| 485 | L0 l2; |
| 486 | L0 l3; |
| 487 | assert(std::try_lock(l0, l1, l2, l3) == 1); |
| 488 | assert(!l0.locked()); |
| 489 | assert(!l1.locked()); |
| 490 | assert(!l2.locked()); |
| 491 | assert(!l3.locked()); |
| 492 | } |
| 493 | { |
| 494 | L0 l0; |
| 495 | L0 l1; |
| 496 | L1 l2; |
| 497 | L0 l3; |
| 498 | assert(std::try_lock(l0, l1, l2, l3) == 2); |
| 499 | assert(!l0.locked()); |
| 500 | assert(!l1.locked()); |
| 501 | assert(!l2.locked()); |
| 502 | assert(!l3.locked()); |
| 503 | } |
| 504 | { |
| 505 | L0 l0; |
| 506 | L0 l1; |
| 507 | L0 l2; |
| 508 | L1 l3; |
| 509 | assert(std::try_lock(l0, l1, l2, l3) == 3); |
| 510 | assert(!l0.locked()); |
| 511 | assert(!l1.locked()); |
| 512 | assert(!l2.locked()); |
| 513 | assert(!l3.locked()); |
| 514 | } |
Howard Hinnant | f11ea14 | 2010-08-22 00:50:25 +0000 | [diff] [blame] | 515 | #endif // _LIBCPP_HAS_NO_VARIADICS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 516 | } |