projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| acac43e2 | 2 | /* Atomic operations usable in machine independent code */ |
| 3f9d35b9 ED |
3 | #ifndef _LINUX_ATOMIC_H |
| 4 | #define _LINUX_ATOMIC_H | |
| ade5ef92 MR |
5 | #include <linux/types.h> |
| 6 | ||
| 3f9d35b9 | 7 | #include <asm/atomic.h> |
| 654672d4 WD |
8 | #include <asm/barrier.h> |
| 9 | ||
| 10 | /* | |
| 11 | * Relaxed variants of xchg, cmpxchg and some atomic operations. | |
| 12 | * | |
| 13 | * We support four variants: | |
| 14 | * | |
| 15 | * - Fully ordered: The default implementation, no suffix required. | |
| 16 | * - Acquire: Provides ACQUIRE semantics, _acquire suffix. | |
| 17 | * - Release: Provides RELEASE semantics, _release suffix. | |
| 18 | * - Relaxed: No ordering guarantees, _relaxed suffix. | |
| 19 | * | |
| 20 | * For compound atomics performing both a load and a store, ACQUIRE | |
| 21 | * semantics apply only to the load and RELEASE semantics only to the | |
| 22 | * store portion of the operation. Note that a failed cmpxchg_acquire | |
| 23 | * does -not- imply any memory ordering constraints. | |
| 24 | * | |
| 25 | * See Documentation/memory-barriers.txt for ACQUIRE/RELEASE definitions. | |
| 26 | */ | |
| 27 | ||
| 28 | #ifndef atomic_read_acquire | |
| 29 | #define atomic_read_acquire(v) smp_load_acquire(&(v)->counter) | |
| 30 | #endif | |
| 31 | ||
| 32 | #ifndef atomic_set_release | |
| 33 | #define atomic_set_release(v, i) smp_store_release(&(v)->counter, (i)) | |
| 34 | #endif | |
| 35 | ||
| 36 | /* | |
| 37 | * The idea here is to build acquire/release variants by adding explicit | |
| 38 | * barriers on top of the relaxed variant. In the case where the relaxed | |
| 39 | * variant is already fully ordered, no additional barriers are needed. | |
| e1ab7f39 | 40 | * |
| fd2efaa4 MR |
41 | * If an architecture overrides __atomic_acquire_fence() it will probably |
| 42 | * want to define smp_mb__after_spinlock(). | |
| 654672d4 | 43 | */ |
| fd2efaa4 MR |
44 | #ifndef __atomic_acquire_fence |
| 45 | #define __atomic_acquire_fence smp_mb__after_atomic | |
| 46 | #endif | |
| 47 | ||
| 48 | #ifndef __atomic_release_fence | |
| 49 | #define __atomic_release_fence smp_mb__before_atomic | |
| 50 | #endif | |
| 51 | ||
| 52 | #ifndef __atomic_pre_full_fence | |
| 53 | #define __atomic_pre_full_fence smp_mb__before_atomic | |
| 54 | #endif | |
| 55 | ||
| 56 | #ifndef __atomic_post_full_fence | |
| 57 | #define __atomic_post_full_fence smp_mb__after_atomic | |
| 58 | #endif | |
| 59 | ||
| 654672d4 WD |
60 | #define __atomic_op_acquire(op, args...) \ |
| 61 | ({ \ | |
| 62 | typeof(op##_relaxed(args)) __ret = op##_relaxed(args); \ | |
| fd2efaa4 | 63 | __atomic_acquire_fence(); \ |
| 654672d4 WD |
64 | __ret; \ |
| 65 | }) | |
| 66 | ||
| 67 | #define __atomic_op_release(op, args...) \ | |
| 68 | ({ \ | |
| fd2efaa4 | 69 | __atomic_release_fence(); \ |
| 654672d4 WD |
70 | op##_relaxed(args); \ |
| 71 | }) | |
| 72 | ||
| 73 | #define __atomic_op_fence(op, args...) \ | |
| 74 | ({ \ | |
| 75 | typeof(op##_relaxed(args)) __ret; \ | |
| fd2efaa4 | 76 | __atomic_pre_full_fence(); \ |
| 654672d4 | 77 | __ret = op##_relaxed(args); \ |
| fd2efaa4 | 78 | __atomic_post_full_fence(); \ |
| 654672d4 WD |
79 | __ret; \ |
| 80 | }) | |
| 81 | ||
| 82 | /* atomic_add_return_relaxed */ | |
| 83 | #ifndef atomic_add_return_relaxed | |
| 84 | #define atomic_add_return_relaxed atomic_add_return | |
| 85 | #define atomic_add_return_acquire atomic_add_return | |
| 86 | #define atomic_add_return_release atomic_add_return | |
| 87 | ||
| 88 | #else /* atomic_add_return_relaxed */ | |
| 89 | ||
| 90 | #ifndef atomic_add_return_acquire | |
| 91 | #define atomic_add_return_acquire(...) \ | |
| 92 | __atomic_op_acquire(atomic_add_return, __VA_ARGS__) | |
| 93 | #endif | |
| 94 | ||
| 95 | #ifndef atomic_add_return_release | |
| 96 | #define atomic_add_return_release(...) \ | |
| 97 | __atomic_op_release(atomic_add_return, __VA_ARGS__) | |
| 98 | #endif | |
| 99 | ||
| 100 | #ifndef atomic_add_return | |
| 101 | #define atomic_add_return(...) \ | |
| 102 | __atomic_op_fence(atomic_add_return, __VA_ARGS__) | |
| 103 | #endif | |
| 104 | #endif /* atomic_add_return_relaxed */ | |
| 105 | ||
| 9837559d MR |
106 | #ifndef atomic_inc |
| 107 | #define atomic_inc(v) atomic_add(1, (v)) | |
| 108 | #endif | |
| 109 | ||
| 63ab7bd0 DB |
110 | /* atomic_inc_return_relaxed */ |
| 111 | #ifndef atomic_inc_return_relaxed | |
| 9837559d MR |
112 | |
| 113 | #ifndef atomic_inc_return | |
| 114 | #define atomic_inc_return(v) atomic_add_return(1, (v)) | |
| 115 | #define atomic_inc_return_relaxed(v) atomic_add_return_relaxed(1, (v)) | |
| 116 | #define atomic_inc_return_acquire(v) atomic_add_return_acquire(1, (v)) | |
| 117 | #define atomic_inc_return_release(v) atomic_add_return_release(1, (v)) | |
| 118 | #else /* atomic_inc_return */ | |
| 63ab7bd0 DB |
119 | #define atomic_inc_return_relaxed atomic_inc_return |
| 120 | #define atomic_inc_return_acquire atomic_inc_return | |
| 121 | #define atomic_inc_return_release atomic_inc_return | |
| 9837559d | 122 | #endif /* atomic_inc_return */ |
| 63ab7bd0 DB |
123 | |
| 124 | #else /* atomic_inc_return_relaxed */ | |
| 125 | ||
| 126 | #ifndef atomic_inc_return_acquire | |
| 127 | #define atomic_inc_return_acquire(...) \ | |
| 128 | __atomic_op_acquire(atomic_inc_return, __VA_ARGS__) | |
| 129 | #endif | |
| 130 | ||
| 131 | #ifndef atomic_inc_return_release | |
| 132 | #define atomic_inc_return_release(...) \ | |
| 133 | __atomic_op_release(atomic_inc_return, __VA_ARGS__) | |
| 134 | #endif | |
| 135 | ||
| 136 | #ifndef atomic_inc_return | |
| 137 | #define atomic_inc_return(...) \ | |
| 138 | __atomic_op_fence(atomic_inc_return, __VA_ARGS__) | |
| 139 | #endif | |
| 140 | #endif /* atomic_inc_return_relaxed */ | |
| 141 | ||
| 654672d4 WD |
142 | /* atomic_sub_return_relaxed */ |
| 143 | #ifndef atomic_sub_return_relaxed | |
| 144 | #define atomic_sub_return_relaxed atomic_sub_return | |
| 145 | #define atomic_sub_return_acquire atomic_sub_return | |
| 146 | #define atomic_sub_return_release atomic_sub_return | |
| 147 | ||
| 148 | #else /* atomic_sub_return_relaxed */ | |
| 149 | ||
| 150 | #ifndef atomic_sub_return_acquire | |
| 151 | #define atomic_sub_return_acquire(...) \ | |
| 152 | __atomic_op_acquire(atomic_sub_return, __VA_ARGS__) | |
| 153 | #endif | |
| 154 | ||
| 155 | #ifndef atomic_sub_return_release | |
| 156 | #define atomic_sub_return_release(...) \ | |
| 157 | __atomic_op_release(atomic_sub_return, __VA_ARGS__) | |
| 158 | #endif | |
| 159 | ||
| 160 | #ifndef atomic_sub_return | |
| 161 | #define atomic_sub_return(...) \ | |
| 162 | __atomic_op_fence(atomic_sub_return, __VA_ARGS__) | |
| 163 | #endif | |
| 164 | #endif /* atomic_sub_return_relaxed */ | |
| 165 | ||
| 9837559d MR |
166 | #ifndef atomic_dec |
| 167 | #define atomic_dec(v) atomic_sub(1, (v)) | |
| 168 | #endif | |
| 169 | ||
| 63ab7bd0 DB |
170 | /* atomic_dec_return_relaxed */ |
| 171 | #ifndef atomic_dec_return_relaxed | |
| 9837559d MR |
172 | |
| 173 | #ifndef atomic_dec_return | |
| 174 | #define atomic_dec_return(v) atomic_sub_return(1, (v)) | |
| 175 | #define atomic_dec_return_relaxed(v) atomic_sub_return_relaxed(1, (v)) | |
| 176 | #define atomic_dec_return_acquire(v) atomic_sub_return_acquire(1, (v)) | |
| 177 | #define atomic_dec_return_release(v) atomic_sub_return_release(1, (v)) | |
| 178 | #else /* atomic_dec_return */ | |
| 63ab7bd0 DB |
179 | #define atomic_dec_return_relaxed atomic_dec_return |
| 180 | #define atomic_dec_return_acquire atomic_dec_return | |
| 181 | #define atomic_dec_return_release atomic_dec_return | |
| 9837559d | 182 | #endif /* atomic_dec_return */ |
| 63ab7bd0 DB |
183 | |
| 184 | #else /* atomic_dec_return_relaxed */ | |
| 185 | ||
| 186 | #ifndef atomic_dec_return_acquire | |
| 187 | #define atomic_dec_return_acquire(...) \ | |
| 188 | __atomic_op_acquire(atomic_dec_return, __VA_ARGS__) | |
| 189 | #endif | |
| 190 | ||
| 191 | #ifndef atomic_dec_return_release | |
| 192 | #define atomic_dec_return_release(...) \ | |
| 193 | __atomic_op_release(atomic_dec_return, __VA_ARGS__) | |
| 194 | #endif | |
| 195 | ||
| 196 | #ifndef atomic_dec_return | |
| 197 | #define atomic_dec_return(...) \ | |
| 198 | __atomic_op_fence(atomic_dec_return, __VA_ARGS__) | |
| 199 | #endif | |
| 200 | #endif /* atomic_dec_return_relaxed */ | |
| 201 | ||
| 28aa2bda PZ |
202 | |
| 203 | /* atomic_fetch_add_relaxed */ | |
| 204 | #ifndef atomic_fetch_add_relaxed | |
| 205 | #define atomic_fetch_add_relaxed atomic_fetch_add | |
| 206 | #define atomic_fetch_add_acquire atomic_fetch_add | |
| 207 | #define atomic_fetch_add_release atomic_fetch_add | |
| 208 | ||
| 209 | #else /* atomic_fetch_add_relaxed */ | |
| 210 | ||
| 211 | #ifndef atomic_fetch_add_acquire | |
| 212 | #define atomic_fetch_add_acquire(...) \ | |
| 213 | __atomic_op_acquire(atomic_fetch_add, __VA_ARGS__) | |
| 214 | #endif | |
| 215 | ||
| 216 | #ifndef atomic_fetch_add_release | |
| 217 | #define atomic_fetch_add_release(...) \ | |
| 218 | __atomic_op_release(atomic_fetch_add, __VA_ARGS__) | |
| 219 | #endif | |
| 220 | ||
| 221 | #ifndef atomic_fetch_add | |
| 222 | #define atomic_fetch_add(...) \ | |
| 223 | __atomic_op_fence(atomic_fetch_add, __VA_ARGS__) | |
| 224 | #endif | |
| 225 | #endif /* atomic_fetch_add_relaxed */ | |
| 226 | ||
| f0662863 DB |
227 | /* atomic_fetch_inc_relaxed */ |
| 228 | #ifndef atomic_fetch_inc_relaxed | |
| 229 | ||
| 230 | #ifndef atomic_fetch_inc | |
| 231 | #define atomic_fetch_inc(v) atomic_fetch_add(1, (v)) | |
| 232 | #define atomic_fetch_inc_relaxed(v) atomic_fetch_add_relaxed(1, (v)) | |
| 233 | #define atomic_fetch_inc_acquire(v) atomic_fetch_add_acquire(1, (v)) | |
| 234 | #define atomic_fetch_inc_release(v) atomic_fetch_add_release(1, (v)) | |
| 235 | #else /* atomic_fetch_inc */ | |
| 236 | #define atomic_fetch_inc_relaxed atomic_fetch_inc | |
| 237 | #define atomic_fetch_inc_acquire atomic_fetch_inc | |
| 238 | #define atomic_fetch_inc_release atomic_fetch_inc | |
| 239 | #endif /* atomic_fetch_inc */ | |
| 240 | ||
| 241 | #else /* atomic_fetch_inc_relaxed */ | |
| 242 | ||
| 243 | #ifndef atomic_fetch_inc_acquire | |
| 244 | #define atomic_fetch_inc_acquire(...) \ | |
| 245 | __atomic_op_acquire(atomic_fetch_inc, __VA_ARGS__) | |
| 246 | #endif | |
| 247 | ||
| 248 | #ifndef atomic_fetch_inc_release | |
| 249 | #define atomic_fetch_inc_release(...) \ | |
| 250 | __atomic_op_release(atomic_fetch_inc, __VA_ARGS__) | |
| 251 | #endif | |
| 252 | ||
| 253 | #ifndef atomic_fetch_inc | |
| 254 | #define atomic_fetch_inc(...) \ | |
| 255 | __atomic_op_fence(atomic_fetch_inc, __VA_ARGS__) | |
| 256 | #endif | |
| 257 | #endif /* atomic_fetch_inc_relaxed */ | |
| 258 | ||
| 28aa2bda PZ |
259 | /* atomic_fetch_sub_relaxed */ |
| 260 | #ifndef atomic_fetch_sub_relaxed | |
| 261 | #define atomic_fetch_sub_relaxed atomic_fetch_sub | |
| 262 | #define atomic_fetch_sub_acquire atomic_fetch_sub | |
| 263 | #define atomic_fetch_sub_release atomic_fetch_sub | |
| 264 | ||
| 265 | #else /* atomic_fetch_sub_relaxed */ | |
| 266 | ||
| 267 | #ifndef atomic_fetch_sub_acquire | |
| 268 | #define atomic_fetch_sub_acquire(...) \ | |
| 269 | __atomic_op_acquire(atomic_fetch_sub, __VA_ARGS__) | |
| 270 | #endif | |
| 271 | ||
| 272 | #ifndef atomic_fetch_sub_release | |
| 273 | #define atomic_fetch_sub_release(...) \ | |
| 274 | __atomic_op_release(atomic_fetch_sub, __VA_ARGS__) | |
| 275 | #endif | |
| 276 | ||
| 277 | #ifndef atomic_fetch_sub | |
| 278 | #define atomic_fetch_sub(...) \ | |
| 279 | __atomic_op_fence(atomic_fetch_sub, __VA_ARGS__) | |
| 280 | #endif | |
| 281 | #endif /* atomic_fetch_sub_relaxed */ | |
| 282 | ||
| f0662863 DB |
283 | /* atomic_fetch_dec_relaxed */ |
| 284 | #ifndef atomic_fetch_dec_relaxed | |
| 285 | ||
| 286 | #ifndef atomic_fetch_dec | |
| 287 | #define atomic_fetch_dec(v) atomic_fetch_sub(1, (v)) | |
| 288 | #define atomic_fetch_dec_relaxed(v) atomic_fetch_sub_relaxed(1, (v)) | |
| 289 | #define atomic_fetch_dec_acquire(v) atomic_fetch_sub_acquire(1, (v)) | |
| 290 | #define atomic_fetch_dec_release(v) atomic_fetch_sub_release(1, (v)) | |
| 291 | #else /* atomic_fetch_dec */ | |
| 292 | #define atomic_fetch_dec_relaxed atomic_fetch_dec | |
| 293 | #define atomic_fetch_dec_acquire atomic_fetch_dec | |
| 294 | #define atomic_fetch_dec_release atomic_fetch_dec | |
| 295 | #endif /* atomic_fetch_dec */ | |
| 296 | ||
| 297 | #else /* atomic_fetch_dec_relaxed */ | |
| 298 | ||
| 299 | #ifndef atomic_fetch_dec_acquire | |
| 300 | #define atomic_fetch_dec_acquire(...) \ | |
| 301 | __atomic_op_acquire(atomic_fetch_dec, __VA_ARGS__) | |
| 302 | #endif | |
| 303 | ||
| 304 | #ifndef atomic_fetch_dec_release | |
| 305 | #define atomic_fetch_dec_release(...) \ | |
| 306 | __atomic_op_release(atomic_fetch_dec, __VA_ARGS__) | |
| 307 | #endif | |
| 308 | ||
| 309 | #ifndef atomic_fetch_dec | |
| 310 | #define atomic_fetch_dec(...) \ | |
| 311 | __atomic_op_fence(atomic_fetch_dec, __VA_ARGS__) | |
| 312 | #endif | |
| 313 | #endif /* atomic_fetch_dec_relaxed */ | |
| 314 | ||
| 28aa2bda PZ |
315 | /* atomic_fetch_or_relaxed */ |
| 316 | #ifndef atomic_fetch_or_relaxed | |
| 317 | #define atomic_fetch_or_relaxed atomic_fetch_or | |
| 318 | #define atomic_fetch_or_acquire atomic_fetch_or | |
| 319 | #define atomic_fetch_or_release atomic_fetch_or | |
| 320 | ||
| 321 | #else /* atomic_fetch_or_relaxed */ | |
| 322 | ||
| 323 | #ifndef atomic_fetch_or_acquire | |
| 324 | #define atomic_fetch_or_acquire(...) \ | |
| 325 | __atomic_op_acquire(atomic_fetch_or, __VA_ARGS__) | |
| 326 | #endif | |
| 327 | ||
| 328 | #ifndef atomic_fetch_or_release | |
| 329 | #define atomic_fetch_or_release(...) \ | |
| 330 | __atomic_op_release(atomic_fetch_or, __VA_ARGS__) | |
| 331 | #endif | |
| 332 | ||
| 333 | #ifndef atomic_fetch_or | |
| 334 | #define atomic_fetch_or(...) \ | |
| 335 | __atomic_op_fence(atomic_fetch_or, __VA_ARGS__) | |
| 336 | #endif | |
| 337 | #endif /* atomic_fetch_or_relaxed */ | |
| 338 | ||
| 339 | /* atomic_fetch_and_relaxed */ | |
| 340 | #ifndef atomic_fetch_and_relaxed | |
| 341 | #define atomic_fetch_and_relaxed atomic_fetch_and | |
| 342 | #define atomic_fetch_and_acquire atomic_fetch_and | |
| 343 | #define atomic_fetch_and_release atomic_fetch_and | |
| 344 | ||
| 345 | #else /* atomic_fetch_and_relaxed */ | |
| 346 | ||
| 347 | #ifndef atomic_fetch_and_acquire | |
| 348 | #define atomic_fetch_and_acquire(...) \ | |
| 349 | __atomic_op_acquire(atomic_fetch_and, __VA_ARGS__) | |
| 350 | #endif | |
| 351 | ||
| 352 | #ifndef atomic_fetch_and_release | |
| 353 | #define atomic_fetch_and_release(...) \ | |
| 354 | __atomic_op_release(atomic_fetch_and, __VA_ARGS__) | |
| 355 | #endif | |
| 356 | ||
| 357 | #ifndef atomic_fetch_and | |
| 358 | #define atomic_fetch_and(...) \ | |
| 359 | __atomic_op_fence(atomic_fetch_and, __VA_ARGS__) | |
| 360 | #endif | |
| 361 | #endif /* atomic_fetch_and_relaxed */ | |
| 362 | ||
| 7cc7eaad MR |
363 | #ifndef atomic_andnot |
| 364 | #define atomic_andnot(i, v) atomic_and(~(int)(i), (v)) | |
| 365 | #endif | |
| 366 | ||
| 28aa2bda | 367 | #ifndef atomic_fetch_andnot_relaxed |
| 7cc7eaad MR |
368 | |
| 369 | #ifndef atomic_fetch_andnot | |
| 370 | #define atomic_fetch_andnot(i, v) atomic_fetch_and(~(int)(i), (v)) | |
| 371 | #define atomic_fetch_andnot_relaxed(i, v) atomic_fetch_and_relaxed(~(int)(i), (v)) | |
| 372 | #define atomic_fetch_andnot_acquire(i, v) atomic_fetch_and_acquire(~(int)(i), (v)) | |
| 373 | #define atomic_fetch_andnot_release(i, v) atomic_fetch_and_release(~(int)(i), (v)) | |
| 374 | #else /* atomic_fetch_andnot */ | |
| 375 | #define atomic_fetch_andnot_relaxed atomic_fetch_andnot | |
| 376 | #define atomic_fetch_andnot_acquire atomic_fetch_andnot | |
| 377 | #define atomic_fetch_andnot_release atomic_fetch_andnot | |
| 378 | #endif /* atomic_fetch_andnot */ | |
| 28aa2bda PZ |
379 | |
| 380 | #else /* atomic_fetch_andnot_relaxed */ | |
| 381 | ||
| 382 | #ifndef atomic_fetch_andnot_acquire | |
| 383 | #define atomic_fetch_andnot_acquire(...) \ | |
| 384 | __atomic_op_acquire(atomic_fetch_andnot, __VA_ARGS__) | |
| 385 | #endif | |
| 386 | ||
| 387 | #ifndef atomic_fetch_andnot_release | |
| 388 | #define atomic_fetch_andnot_release(...) \ | |
| 389 | __atomic_op_release(atomic_fetch_andnot, __VA_ARGS__) | |
| 390 | #endif | |
| 391 | ||
| 392 | #ifndef atomic_fetch_andnot | |
| 393 | #define atomic_fetch_andnot(...) \ | |
| 394 | __atomic_op_fence(atomic_fetch_andnot, __VA_ARGS__) | |
| 395 | #endif | |
| 396 | #endif /* atomic_fetch_andnot_relaxed */ | |
| 28aa2bda PZ |
397 | |
| 398 | /* atomic_fetch_xor_relaxed */ | |
| 399 | #ifndef atomic_fetch_xor_relaxed | |
| 400 | #define atomic_fetch_xor_relaxed atomic_fetch_xor | |
| 401 | #define atomic_fetch_xor_acquire atomic_fetch_xor | |
| 402 | #define atomic_fetch_xor_release atomic_fetch_xor | |
| 403 | ||
| 404 | #else /* atomic_fetch_xor_relaxed */ | |
| 405 | ||
| 406 | #ifndef atomic_fetch_xor_acquire | |
| 407 | #define atomic_fetch_xor_acquire(...) \ | |
| 408 | __atomic_op_acquire(atomic_fetch_xor, __VA_ARGS__) | |
| 409 | #endif | |
| 410 | ||
| 411 | #ifndef atomic_fetch_xor_release | |
| 412 | #define atomic_fetch_xor_release(...) \ | |
| 413 | __atomic_op_release(atomic_fetch_xor, __VA_ARGS__) | |
| 414 | #endif | |
| 415 | ||
| 416 | #ifndef atomic_fetch_xor | |
| 417 | #define atomic_fetch_xor(...) \ | |
| 418 | __atomic_op_fence(atomic_fetch_xor, __VA_ARGS__) | |
| 419 | #endif | |
| 420 | #endif /* atomic_fetch_xor_relaxed */ | |
| 421 | ||
| 422 | ||
| 654672d4 WD |
423 | /* atomic_xchg_relaxed */ |
| 424 | #ifndef atomic_xchg_relaxed | |
| 425 | #define atomic_xchg_relaxed atomic_xchg | |
| 426 | #define atomic_xchg_acquire atomic_xchg | |
| 427 | #define atomic_xchg_release atomic_xchg | |
| 428 | ||
| 429 | #else /* atomic_xchg_relaxed */ | |
| 430 | ||
| 431 | #ifndef atomic_xchg_acquire | |
| 432 | #define atomic_xchg_acquire(...) \ | |
| 433 | __atomic_op_acquire(atomic_xchg, __VA_ARGS__) | |
| 434 | #endif | |
| 435 | ||
| 436 | #ifndef atomic_xchg_release | |
| 437 | #define atomic_xchg_release(...) \ | |
| 438 | __atomic_op_release(atomic_xchg, __VA_ARGS__) | |
| 439 | #endif | |
| 440 | ||
| 441 | #ifndef atomic_xchg | |
| 442 | #define atomic_xchg(...) \ | |
| 443 | __atomic_op_fence(atomic_xchg, __VA_ARGS__) | |
| 444 | #endif | |
| 445 | #endif /* atomic_xchg_relaxed */ | |
| 446 | ||
| 447 | /* atomic_cmpxchg_relaxed */ | |
| 448 | #ifndef atomic_cmpxchg_relaxed | |
| 449 | #define atomic_cmpxchg_relaxed atomic_cmpxchg | |
| 450 | #define atomic_cmpxchg_acquire atomic_cmpxchg | |
| 451 | #define atomic_cmpxchg_release atomic_cmpxchg | |
| 452 | ||
| 453 | #else /* atomic_cmpxchg_relaxed */ | |
| 454 | ||
| 455 | #ifndef atomic_cmpxchg_acquire | |
| 456 | #define atomic_cmpxchg_acquire(...) \ | |
| 457 | __atomic_op_acquire(atomic_cmpxchg, __VA_ARGS__) | |
| 458 | #endif | |
| 459 | ||
| 460 | #ifndef atomic_cmpxchg_release | |
| 461 | #define atomic_cmpxchg_release(...) \ | |
| 462 | __atomic_op_release(atomic_cmpxchg, __VA_ARGS__) | |
| 463 | #endif | |
| 464 | ||
| 465 | #ifndef atomic_cmpxchg | |
| 466 | #define atomic_cmpxchg(...) \ | |
| 467 | __atomic_op_fence(atomic_cmpxchg, __VA_ARGS__) | |
| 468 | #endif | |
| 469 | #endif /* atomic_cmpxchg_relaxed */ | |
| 470 | ||
| a9ebf306 PZ |
471 | #ifndef atomic_try_cmpxchg |
| 472 | ||
| 473 | #define __atomic_try_cmpxchg(type, _p, _po, _n) \ | |
| 474 | ({ \ | |
| 475 | typeof(_po) __po = (_po); \ | |
| 44fe8445 PZ |
476 | typeof(*(_po)) __r, __o = *__po; \ |
| 477 | __r = atomic_cmpxchg##type((_p), __o, (_n)); \ | |
| 478 | if (unlikely(__r != __o)) \ | |
| 479 | *__po = __r; \ | |
| 480 | likely(__r == __o); \ | |
| a9ebf306 PZ |
481 | }) |
| 482 | ||
| 483 | #define atomic_try_cmpxchg(_p, _po, _n) __atomic_try_cmpxchg(, _p, _po, _n) | |
| 484 | #define atomic_try_cmpxchg_relaxed(_p, _po, _n) __atomic_try_cmpxchg(_relaxed, _p, _po, _n) | |
| 485 | #define atomic_try_cmpxchg_acquire(_p, _po, _n) __atomic_try_cmpxchg(_acquire, _p, _po, _n) | |
| 486 | #define atomic_try_cmpxchg_release(_p, _po, _n) __atomic_try_cmpxchg(_release, _p, _po, _n) | |
| 487 | ||
| 488 | #else /* atomic_try_cmpxchg */ | |
| 489 | #define atomic_try_cmpxchg_relaxed atomic_try_cmpxchg | |
| 490 | #define atomic_try_cmpxchg_acquire atomic_try_cmpxchg | |
| 491 | #define atomic_try_cmpxchg_release atomic_try_cmpxchg | |
| 492 | #endif /* atomic_try_cmpxchg */ | |
| 493 | ||
| 654672d4 WD |
494 | /* cmpxchg_relaxed */ |
| 495 | #ifndef cmpxchg_relaxed | |
| 496 | #define cmpxchg_relaxed cmpxchg | |
| 497 | #define cmpxchg_acquire cmpxchg | |
| 498 | #define cmpxchg_release cmpxchg | |
| 499 | ||
| 500 | #else /* cmpxchg_relaxed */ | |
| 501 | ||
| 502 | #ifndef cmpxchg_acquire | |
| 503 | #define cmpxchg_acquire(...) \ | |
| 504 | __atomic_op_acquire(cmpxchg, __VA_ARGS__) | |
| 505 | #endif | |
| 506 | ||
| 507 | #ifndef cmpxchg_release | |
| 508 | #define cmpxchg_release(...) \ | |
| 509 | __atomic_op_release(cmpxchg, __VA_ARGS__) | |
| 510 | #endif | |
| 511 | ||
| 512 | #ifndef cmpxchg | |
| 513 | #define cmpxchg(...) \ | |
| 514 | __atomic_op_fence(cmpxchg, __VA_ARGS__) | |
| 515 | #endif | |
| 516 | #endif /* cmpxchg_relaxed */ | |
| 517 | ||
| 518 | /* cmpxchg64_relaxed */ | |
| 519 | #ifndef cmpxchg64_relaxed | |
| 520 | #define cmpxchg64_relaxed cmpxchg64 | |
| 521 | #define cmpxchg64_acquire cmpxchg64 | |
| 522 | #define cmpxchg64_release cmpxchg64 | |
| 523 | ||
| 524 | #else /* cmpxchg64_relaxed */ | |
| 525 | ||
| 526 | #ifndef cmpxchg64_acquire | |
| 527 | #define cmpxchg64_acquire(...) \ | |
| 528 | __atomic_op_acquire(cmpxchg64, __VA_ARGS__) | |
| 529 | #endif | |
| 530 | ||
| 531 | #ifndef cmpxchg64_release | |
| 532 | #define cmpxchg64_release(...) \ | |
| 533 | __atomic_op_release(cmpxchg64, __VA_ARGS__) | |
| 534 | #endif | |
| 535 | ||
| 536 | #ifndef cmpxchg64 | |
| 537 | #define cmpxchg64(...) \ | |
| 538 | __atomic_op_fence(cmpxchg64, __VA_ARGS__) | |
| 539 | #endif | |
| 540 | #endif /* cmpxchg64_relaxed */ | |
| 541 | ||
| 542 | /* xchg_relaxed */ | |
| 543 | #ifndef xchg_relaxed | |
| 544 | #define xchg_relaxed xchg | |
| 545 | #define xchg_acquire xchg | |
| 546 | #define xchg_release xchg | |
| 547 | ||
| 548 | #else /* xchg_relaxed */ | |
| 549 | ||
| 550 | #ifndef xchg_acquire | |
| 551 | #define xchg_acquire(...) __atomic_op_acquire(xchg, __VA_ARGS__) | |
| 552 | #endif | |
| 553 | ||
| 554 | #ifndef xchg_release | |
| 555 | #define xchg_release(...) __atomic_op_release(xchg, __VA_ARGS__) | |
| 556 | #endif | |
| 557 | ||
| 558 | #ifndef xchg | |
| 559 | #define xchg(...) __atomic_op_fence(xchg, __VA_ARGS__) | |
| 560 | #endif | |
| 561 | #endif /* xchg_relaxed */ | |
| 3f9d35b9 | 562 | |
| eccc2da8 MR |
563 | /** |
| 564 | * atomic_fetch_add_unless - add unless the number is already a given value | |
| 565 | * @v: pointer of type atomic_t | |
| 566 | * @a: the amount to add to v... | |
| 567 | * @u: ...unless v is equal to u. | |
| 568 | * | |
| 569 | * Atomically adds @a to @v, if @v was not already @u. | |
| 570 | * Returns the original value of @v. | |
| 571 | */ | |
| 572 | #ifndef atomic_fetch_add_unless | |
| 573 | static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u) | |
| 574 | { | |
| 575 | int c = atomic_read(v); | |
| 576 | ||
| 577 | do { | |
| 578 | if (unlikely(c == u)) | |
| 579 | break; | |
| 580 | } while (!atomic_try_cmpxchg(v, &c, c + a)); | |
| 581 | ||
| 582 | return c; | |
| 583 | } | |
| 584 | #endif | |
| 585 | ||
| f24219b4 AS |
586 | /** |
| 587 | * atomic_add_unless - add unless the number is already a given value | |
| 588 | * @v: pointer of type atomic_t | |
| 589 | * @a: the amount to add to v... | |
| 590 | * @u: ...unless v is equal to u. | |
| 591 | * | |
| ade5ef92 MR |
592 | * Atomically adds @a to @v, if @v was not already @u. |
| 593 | * Returns true if the addition was done. | |
| f24219b4 | 594 | */ |
| ade5ef92 | 595 | static inline bool atomic_add_unless(atomic_t *v, int a, int u) |
| f24219b4 | 596 | { |
| bfc18e38 | 597 | return atomic_fetch_add_unless(v, a, u) != u; |
| f24219b4 AS |
598 | } |
| 599 | ||
| 60063497 AS |
600 | /** |
| 601 | * atomic_inc_not_zero - increment unless the number is zero | |
| 602 | * @v: pointer of type atomic_t | |
| 603 | * | |
| ade5ef92 MR |
604 | * Atomically increments @v by 1, if @v is non-zero. |
| 605 | * Returns true if the increment was done. | |
| 60063497 | 606 | */ |
| b1ada601 | 607 | #ifndef atomic_inc_not_zero |
| 60063497 | 608 | #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) |
| b1ada601 | 609 | #endif |
| 60063497 | 610 | |
| 18cc1814 MR |
611 | /** |
| 612 | * atomic_inc_and_test - increment and test | |
| 613 | * @v: pointer of type atomic_t | |
| 614 | * | |
| 615 | * Atomically increments @v by 1 | |
| 616 | * and returns true if the result is zero, or false for all | |
| 617 | * other cases. | |
| 618 | */ | |
| 619 | #ifndef atomic_inc_and_test | |
| 620 | static inline bool atomic_inc_and_test(atomic_t *v) | |
| 621 | { | |
| 622 | return atomic_inc_return(v) == 0; | |
| 623 | } | |
| 624 | #endif | |
| 625 | ||
| 626 | /** | |
| 627 | * atomic_dec_and_test - decrement and test | |
| 628 | * @v: pointer of type atomic_t | |
| 629 | * | |
| 630 | * Atomically decrements @v by 1 and | |
| 631 | * returns true if the result is 0, or false for all other | |
| 632 | * cases. | |
| 633 | */ | |
| 634 | #ifndef atomic_dec_and_test | |
| 635 | static inline bool atomic_dec_and_test(atomic_t *v) | |
| 636 | { | |
| 637 | return atomic_dec_return(v) == 0; | |
| 638 | } | |
| 639 | #endif | |
| 640 | ||
| 641 | /** | |
| 642 | * atomic_sub_and_test - subtract value from variable and test result | |
| 643 | * @i: integer value to subtract | |
| 644 | * @v: pointer of type atomic_t | |
| 645 | * | |
| 646 | * Atomically subtracts @i from @v and returns | |
| 647 | * true if the result is zero, or false for all | |
| 648 | * other cases. | |
| 649 | */ | |
| 650 | #ifndef atomic_sub_and_test | |
| 651 | static inline bool atomic_sub_and_test(int i, atomic_t *v) | |
| 652 | { | |
| 653 | return atomic_sub_return(i, v) == 0; | |
| 654 | } | |
| 655 | #endif | |
| 656 | ||
| 657 | /** | |
| 658 | * atomic_add_negative - add and test if negative | |
| 659 | * @i: integer value to add | |
| 660 | * @v: pointer of type atomic_t | |
| 661 | * | |
| 662 | * Atomically adds @i to @v and returns true | |
| 663 | * if the result is negative, or false when | |
| 664 | * result is greater than or equal to zero. | |
| 665 | */ | |
| 666 | #ifndef atomic_add_negative | |
| 667 | static inline bool atomic_add_negative(int i, atomic_t *v) | |
| 668 | { | |
| 669 | return atomic_add_return(i, v) < 0; | |
| 670 | } | |
| 671 | #endif | |
| 672 | ||
| 07b8ce1e | 673 | #ifndef atomic_inc_unless_negative |
| b3a2a05f | 674 | static inline bool atomic_inc_unless_negative(atomic_t *v) |
| 07b8ce1e | 675 | { |
| b3a2a05f MR |
676 | int c = atomic_read(v); |
| 677 | ||
| 678 | do { | |
| 679 | if (unlikely(c < 0)) | |
| 680 | return false; | |
| 681 | } while (!atomic_try_cmpxchg(v, &c, c + 1)); | |
| 682 | ||
| 683 | return true; | |
| 07b8ce1e AV |
684 | } |
| 685 | #endif | |
| 686 | ||
| 687 | #ifndef atomic_dec_unless_positive | |
| b3a2a05f | 688 | static inline bool atomic_dec_unless_positive(atomic_t *v) |
| 07b8ce1e | 689 | { |
| b3a2a05f MR |
690 | int c = atomic_read(v); |
| 691 | ||
| 692 | do { | |
| 693 | if (unlikely(c > 0)) | |
| 694 | return false; | |
| 695 | } while (!atomic_try_cmpxchg(v, &c, c - 1)); | |
| 696 | ||
| 697 | return true; | |
| 07b8ce1e AV |
698 | } |
| 699 | #endif | |
| 700 | ||
| e79bee24 SL |
701 | /* |
| 702 | * atomic_dec_if_positive - decrement by 1 if old value positive | |
| 703 | * @v: pointer of type atomic_t | |
| 704 | * | |
| 705 | * The function returns the old value of *v minus 1, even if | |
| 706 | * the atomic variable, v, was not decremented. | |
| 707 | */ | |
| 708 | #ifndef atomic_dec_if_positive | |
| 709 | static inline int atomic_dec_if_positive(atomic_t *v) | |
| 710 | { | |
| b3a2a05f MR |
711 | int dec, c = atomic_read(v); |
| 712 | ||
| 713 | do { | |
| e79bee24 SL |
714 | dec = c - 1; |
| 715 | if (unlikely(dec < 0)) | |
| 716 | break; | |
| b3a2a05f MR |
717 | } while (!atomic_try_cmpxchg(v, &c, dec)); |
| 718 | ||
| e79bee24 SL |
719 | return dec; |
| 720 | } | |
| 721 | #endif | |
| 722 | ||
| fcfdfe30 | 723 | #define atomic_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c)) |
| 4df714be WD |
724 | #define atomic_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c)) |
| 725 | ||
| 7847777a AS |
726 | #ifdef CONFIG_GENERIC_ATOMIC64 |
| 727 | #include <asm-generic/atomic64.h> | |
| 728 | #endif | |
| de9e432c | 729 | |
| e1213332 PZ |
730 | #ifndef atomic64_read_acquire |
| 731 | #define atomic64_read_acquire(v) smp_load_acquire(&(v)->counter) | |
| 732 | #endif | |
| 733 | ||
| 734 | #ifndef atomic64_set_release | |
| 735 | #define atomic64_set_release(v, i) smp_store_release(&(v)->counter, (i)) | |
| 736 | #endif | |
| 737 | ||
| 738 | /* atomic64_add_return_relaxed */ | |
| 739 | #ifndef atomic64_add_return_relaxed | |
| 740 | #define atomic64_add_return_relaxed atomic64_add_return | |
| 741 | #define atomic64_add_return_acquire atomic64_add_return | |
| 742 | #define atomic64_add_return_release atomic64_add_return | |
| 743 | ||
| 744 | #else /* atomic64_add_return_relaxed */ | |
| 745 | ||
| 746 | #ifndef atomic64_add_return_acquire | |
| 747 | #define atomic64_add_return_acquire(...) \ | |
| 748 | __atomic_op_acquire(atomic64_add_return, __VA_ARGS__) | |
| 749 | #endif | |
| 750 | ||
| 751 | #ifndef atomic64_add_return_release | |
| 752 | #define atomic64_add_return_release(...) \ | |
| 753 | __atomic_op_release(atomic64_add_return, __VA_ARGS__) | |
| 754 | #endif | |
| 755 | ||
| 756 | #ifndef atomic64_add_return | |
| 757 | #define atomic64_add_return(...) \ | |
| 758 | __atomic_op_fence(atomic64_add_return, __VA_ARGS__) | |
| 759 | #endif | |
| 760 | #endif /* atomic64_add_return_relaxed */ | |
| 761 | ||
| 9837559d MR |
762 | #ifndef atomic64_inc |
| 763 | #define atomic64_inc(v) atomic64_add(1, (v)) | |
| 764 | #endif | |
| 765 | ||
| e1213332 PZ |
766 | /* atomic64_inc_return_relaxed */ |
| 767 | #ifndef atomic64_inc_return_relaxed | |
| 9837559d MR |
768 | |
| 769 | #ifndef atomic64_inc_return | |
| 770 | #define atomic64_inc_return(v) atomic64_add_return(1, (v)) | |
| 771 | #define atomic64_inc_return_relaxed(v) atomic64_add_return_relaxed(1, (v)) | |
| 772 | #define atomic64_inc_return_acquire(v) atomic64_add_return_acquire(1, (v)) | |
| 773 | #define atomic64_inc_return_release(v) atomic64_add_return_release(1, (v)) | |
| 774 | #else /* atomic64_inc_return */ | |
| e1213332 PZ |
775 | #define atomic64_inc_return_relaxed atomic64_inc_return |
| 776 | #define atomic64_inc_return_acquire atomic64_inc_return | |
| 777 | #define atomic64_inc_return_release atomic64_inc_return | |
| 9837559d | 778 | #endif /* atomic64_inc_return */ |
| e1213332 PZ |
779 | |
| 780 | #else /* atomic64_inc_return_relaxed */ | |
| 781 | ||
| 782 | #ifndef atomic64_inc_return_acquire | |
| 783 | #define atomic64_inc_return_acquire(...) \ | |
| 784 | __atomic_op_acquire(atomic64_inc_return, __VA_ARGS__) | |
| 785 | #endif | |
| 786 | ||
| 787 | #ifndef atomic64_inc_return_release | |
| 788 | #define atomic64_inc_return_release(...) \ | |
| 789 | __atomic_op_release(atomic64_inc_return, __VA_ARGS__) | |
| 790 | #endif | |
| 791 | ||
| 792 | #ifndef atomic64_inc_return | |
| 793 | #define atomic64_inc_return(...) \ | |
| 794 | __atomic_op_fence(atomic64_inc_return, __VA_ARGS__) | |
| 795 | #endif | |
| 796 | #endif /* atomic64_inc_return_relaxed */ | |
| 797 | ||
| 798 | ||
| 799 | /* atomic64_sub_return_relaxed */ | |
| 800 | #ifndef atomic64_sub_return_relaxed | |
| 801 | #define atomic64_sub_return_relaxed atomic64_sub_return | |
| 802 | #define atomic64_sub_return_acquire atomic64_sub_return | |
| 803 | #define atomic64_sub_return_release atomic64_sub_return | |
| 804 | ||
| 805 | #else /* atomic64_sub_return_relaxed */ | |
| 806 | ||
| 807 | #ifndef atomic64_sub_return_acquire | |
| 808 | #define atomic64_sub_return_acquire(...) \ | |
| 809 | __atomic_op_acquire(atomic64_sub_return, __VA_ARGS__) | |
| 810 | #endif | |
| 811 | ||
| 812 | #ifndef atomic64_sub_return_release | |
| 813 | #define atomic64_sub_return_release(...) \ | |
| 814 | __atomic_op_release(atomic64_sub_return, __VA_ARGS__) | |
| 815 | #endif | |
| 816 | ||
| 817 | #ifndef atomic64_sub_return | |
| 818 | #define atomic64_sub_return(...) \ | |
| 819 | __atomic_op_fence(atomic64_sub_return, __VA_ARGS__) | |
| 820 | #endif | |
| 821 | #endif /* atomic64_sub_return_relaxed */ | |
| 822 | ||
| 9837559d MR |
823 | #ifndef atomic64_dec |
| 824 | #define atomic64_dec(v) atomic64_sub(1, (v)) | |
| 825 | #endif | |
| 826 | ||
| e1213332 PZ |
827 | /* atomic64_dec_return_relaxed */ |
| 828 | #ifndef atomic64_dec_return_relaxed | |
| 9837559d MR |
829 | |
| 830 | #ifndef atomic64_dec_return | |
| 831 | #define atomic64_dec_return(v) atomic64_sub_return(1, (v)) | |
| 832 | #define atomic64_dec_return_relaxed(v) atomic64_sub_return_relaxed(1, (v)) | |
| 833 | #define atomic64_dec_return_acquire(v) atomic64_sub_return_acquire(1, (v)) | |
| 834 | #define atomic64_dec_return_release(v) atomic64_sub_return_release(1, (v)) | |
| 835 | #else /* atomic64_dec_return */ | |
| e1213332 PZ |
836 | #define atomic64_dec_return_relaxed atomic64_dec_return |
| 837 | #define atomic64_dec_return_acquire atomic64_dec_return | |
| 838 | #define atomic64_dec_return_release atomic64_dec_return | |
| 9837559d | 839 | #endif /* atomic64_dec_return */ |
| e1213332 PZ |
840 | |
| 841 | #else /* atomic64_dec_return_relaxed */ | |
| 842 | ||
| 843 | #ifndef atomic64_dec_return_acquire | |
| 844 | #define atomic64_dec_return_acquire(...) \ | |
| 845 | __atomic_op_acquire(atomic64_dec_return, __VA_ARGS__) | |
| 846 | #endif | |
| 847 | ||
| 848 | #ifndef atomic64_dec_return_release | |
| 849 | #define atomic64_dec_return_release(...) \ | |
| 850 | __atomic_op_release(atomic64_dec_return, __VA_ARGS__) | |
| 851 | #endif | |
| 852 | ||
| 853 | #ifndef atomic64_dec_return | |
| 854 | #define atomic64_dec_return(...) \ | |
| 855 | __atomic_op_fence(atomic64_dec_return, __VA_ARGS__) | |
| 856 | #endif | |
| 857 | #endif /* atomic64_dec_return_relaxed */ | |
| 858 | ||
| 28aa2bda PZ |
859 | |
| 860 | /* atomic64_fetch_add_relaxed */ | |
| 861 | #ifndef atomic64_fetch_add_relaxed | |
| 862 | #define atomic64_fetch_add_relaxed atomic64_fetch_add | |
| 863 | #define atomic64_fetch_add_acquire atomic64_fetch_add | |
| 864 | #define atomic64_fetch_add_release atomic64_fetch_add | |
| 865 | ||
| 866 | #else /* atomic64_fetch_add_relaxed */ | |
| 867 | ||
| 868 | #ifndef atomic64_fetch_add_acquire | |
| 869 | #define atomic64_fetch_add_acquire(...) \ | |
| 870 | __atomic_op_acquire(atomic64_fetch_add, __VA_ARGS__) | |
| 871 | #endif | |
| 872 | ||
| 873 | #ifndef atomic64_fetch_add_release | |
| 874 | #define atomic64_fetch_add_release(...) \ | |
| 875 | __atomic_op_release(atomic64_fetch_add, __VA_ARGS__) | |
| 876 | #endif | |
| 877 | ||
| 878 | #ifndef atomic64_fetch_add | |
| 879 | #define atomic64_fetch_add(...) \ | |
| 880 | __atomic_op_fence(atomic64_fetch_add, __VA_ARGS__) | |
| 881 | #endif | |
| 882 | #endif /* atomic64_fetch_add_relaxed */ | |
| 883 | ||
| f0662863 DB |
884 | /* atomic64_fetch_inc_relaxed */ |
| 885 | #ifndef atomic64_fetch_inc_relaxed | |
| 886 | ||
| 887 | #ifndef atomic64_fetch_inc | |
| 888 | #define atomic64_fetch_inc(v) atomic64_fetch_add(1, (v)) | |
| 889 | #define atomic64_fetch_inc_relaxed(v) atomic64_fetch_add_relaxed(1, (v)) | |
| 890 | #define atomic64_fetch_inc_acquire(v) atomic64_fetch_add_acquire(1, (v)) | |
| 891 | #define atomic64_fetch_inc_release(v) atomic64_fetch_add_release(1, (v)) | |
| 892 | #else /* atomic64_fetch_inc */ | |
| 893 | #define atomic64_fetch_inc_relaxed atomic64_fetch_inc | |
| 894 | #define atomic64_fetch_inc_acquire atomic64_fetch_inc | |
| 895 | #define atomic64_fetch_inc_release atomic64_fetch_inc | |
| 896 | #endif /* atomic64_fetch_inc */ | |
| 897 | ||
| 898 | #else /* atomic64_fetch_inc_relaxed */ | |
| 899 | ||
| 900 | #ifndef atomic64_fetch_inc_acquire | |
| 901 | #define atomic64_fetch_inc_acquire(...) \ | |
| 902 | __atomic_op_acquire(atomic64_fetch_inc, __VA_ARGS__) | |
| 903 | #endif | |
| 904 | ||
| 905 | #ifndef atomic64_fetch_inc_release | |
| 906 | #define atomic64_fetch_inc_release(...) \ | |
| 907 | __atomic_op_release(atomic64_fetch_inc, __VA_ARGS__) | |
| 908 | #endif | |
| 909 | ||
| 910 | #ifndef atomic64_fetch_inc | |
| 911 | #define atomic64_fetch_inc(...) \ | |
| 912 | __atomic_op_fence(atomic64_fetch_inc, __VA_ARGS__) | |
| 913 | #endif | |
| 914 | #endif /* atomic64_fetch_inc_relaxed */ | |
| 915 | ||
| 28aa2bda PZ |
916 | /* atomic64_fetch_sub_relaxed */ |
| 917 | #ifndef atomic64_fetch_sub_relaxed | |
| 918 | #define atomic64_fetch_sub_relaxed atomic64_fetch_sub | |
| 919 | #define atomic64_fetch_sub_acquire atomic64_fetch_sub | |
| 920 | #define atomic64_fetch_sub_release atomic64_fetch_sub | |
| 921 | ||
| 922 | #else /* atomic64_fetch_sub_relaxed */ | |
| 923 | ||
| 924 | #ifndef atomic64_fetch_sub_acquire | |
| 925 | #define atomic64_fetch_sub_acquire(...) \ | |
| 926 | __atomic_op_acquire(atomic64_fetch_sub, __VA_ARGS__) | |
| 927 | #endif | |
| 928 | ||
| 929 | #ifndef atomic64_fetch_sub_release | |
| 930 | #define atomic64_fetch_sub_release(...) \ | |
| 931 | __atomic_op_release(atomic64_fetch_sub, __VA_ARGS__) | |
| 932 | #endif | |
| 933 | ||
| 934 | #ifndef atomic64_fetch_sub | |
| 935 | #define atomic64_fetch_sub(...) \ | |
| 936 | __atomic_op_fence(atomic64_fetch_sub, __VA_ARGS__) | |
| 937 | #endif | |
| 938 | #endif /* atomic64_fetch_sub_relaxed */ | |
| 939 | ||
| f0662863 DB |
940 | /* atomic64_fetch_dec_relaxed */ |
| 941 | #ifndef atomic64_fetch_dec_relaxed | |
| 942 | ||
| 943 | #ifndef atomic64_fetch_dec | |
| 944 | #define atomic64_fetch_dec(v) atomic64_fetch_sub(1, (v)) | |
| 945 | #define atomic64_fetch_dec_relaxed(v) atomic64_fetch_sub_relaxed(1, (v)) | |
| 946 | #define atomic64_fetch_dec_acquire(v) atomic64_fetch_sub_acquire(1, (v)) | |
| 947 | #define atomic64_fetch_dec_release(v) atomic64_fetch_sub_release(1, (v)) | |
| 948 | #else /* atomic64_fetch_dec */ | |
| 949 | #define atomic64_fetch_dec_relaxed atomic64_fetch_dec | |
| 950 | #define atomic64_fetch_dec_acquire atomic64_fetch_dec | |
| 951 | #define atomic64_fetch_dec_release atomic64_fetch_dec | |
| 952 | #endif /* atomic64_fetch_dec */ | |
| 953 | ||
| 954 | #else /* atomic64_fetch_dec_relaxed */ | |
| 955 | ||
| 956 | #ifndef atomic64_fetch_dec_acquire | |
| 957 | #define atomic64_fetch_dec_acquire(...) \ | |
| 958 | __atomic_op_acquire(atomic64_fetch_dec, __VA_ARGS__) | |
| 959 | #endif | |
| 960 | ||
| 961 | #ifndef atomic64_fetch_dec_release | |
| 962 | #define atomic64_fetch_dec_release(...) \ | |
| 963 | __atomic_op_release(atomic64_fetch_dec, __VA_ARGS__) | |
| 964 | #endif | |
| 965 | ||
| 966 | #ifndef atomic64_fetch_dec | |
| 967 | #define atomic64_fetch_dec(...) \ | |
| 968 | __atomic_op_fence(atomic64_fetch_dec, __VA_ARGS__) | |
| 969 | #endif | |
| 970 | #endif /* atomic64_fetch_dec_relaxed */ | |
| 971 | ||
| 28aa2bda PZ |
972 | /* atomic64_fetch_or_relaxed */ |
| 973 | #ifndef atomic64_fetch_or_relaxed | |
| 974 | #define atomic64_fetch_or_relaxed atomic64_fetch_or | |
| 975 | #define atomic64_fetch_or_acquire atomic64_fetch_or | |
| 976 | #define atomic64_fetch_or_release atomic64_fetch_or | |
| 977 | ||
| 978 | #else /* atomic64_fetch_or_relaxed */ | |
| 979 | ||
| 980 | #ifndef atomic64_fetch_or_acquire | |
| 981 | #define atomic64_fetch_or_acquire(...) \ | |
| 982 | __atomic_op_acquire(atomic64_fetch_or, __VA_ARGS__) | |
| 983 | #endif | |
| 984 | ||
| 985 | #ifndef atomic64_fetch_or_release | |
| 986 | #define atomic64_fetch_or_release(...) \ | |
| 987 | __atomic_op_release(atomic64_fetch_or, __VA_ARGS__) | |
| 988 | #endif | |
| 989 | ||
| 990 | #ifndef atomic64_fetch_or | |
| 991 | #define atomic64_fetch_or(...) \ | |
| 992 | __atomic_op_fence(atomic64_fetch_or, __VA_ARGS__) | |
| 993 | #endif | |
| 994 | #endif /* atomic64_fetch_or_relaxed */ | |
| 995 | ||
| 996 | /* atomic64_fetch_and_relaxed */ | |
| 997 | #ifndef atomic64_fetch_and_relaxed | |
| 998 | #define atomic64_fetch_and_relaxed atomic64_fetch_and | |
| 999 | #define atomic64_fetch_and_acquire atomic64_fetch_and | |
| 1000 | #define atomic64_fetch_and_release atomic64_fetch_and | |
| 1001 | ||
| 1002 | #else /* atomic64_fetch_and_relaxed */ | |
| 1003 | ||
| 1004 | #ifndef atomic64_fetch_and_acquire | |
| 1005 | #define atomic64_fetch_and_acquire(...) \ | |
| 1006 | __atomic_op_acquire(atomic64_fetch_and, __VA_ARGS__) | |
| 1007 | #endif | |
| 1008 | ||
| 1009 | #ifndef atomic64_fetch_and_release | |
| 1010 | #define atomic64_fetch_and_release(...) \ | |
| 1011 | __atomic_op_release(atomic64_fetch_and, __VA_ARGS__) | |
| 1012 | #endif | |
| 1013 | ||
| 1014 | #ifndef atomic64_fetch_and | |
| 1015 | #define atomic64_fetch_and(...) \ | |
| 1016 | __atomic_op_fence(atomic64_fetch_and, __VA_ARGS__) | |
| 1017 | #endif | |
| 1018 | #endif /* atomic64_fetch_and_relaxed */ | |
| 1019 | ||
| 7cc7eaad MR |
1020 | #ifndef atomic64_andnot |
| 1021 | #define atomic64_andnot(i, v) atomic64_and(~(long long)(i), (v)) | |
| 1022 | #endif | |
| 1023 | ||
| 28aa2bda | 1024 | #ifndef atomic64_fetch_andnot_relaxed |
| 7cc7eaad MR |
1025 | |
| 1026 | #ifndef atomic64_fetch_andnot | |
| 1027 | #define atomic64_fetch_andnot(i, v) atomic64_fetch_and(~(long long)(i), (v)) | |
| 1028 | #define atomic64_fetch_andnot_relaxed(i, v) atomic64_fetch_and_relaxed(~(long long)(i), (v)) | |
| 1029 | #define atomic64_fetch_andnot_acquire(i, v) atomic64_fetch_and_acquire(~(long long)(i), (v)) | |
| 1030 | #define atomic64_fetch_andnot_release(i, v) atomic64_fetch_and_release(~(long long)(i), (v)) | |
| 1031 | #else /* atomic64_fetch_andnot */ | |
| 1032 | #define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot | |
| 1033 | #define atomic64_fetch_andnot_acquire atomic64_fetch_andnot | |
| 1034 | #define atomic64_fetch_andnot_release atomic64_fetch_andnot | |
| 1035 | #endif /* atomic64_fetch_andnot */ | |
| 28aa2bda PZ |
1036 | |
| 1037 | #else /* atomic64_fetch_andnot_relaxed */ | |
| 1038 | ||
| 1039 | #ifndef atomic64_fetch_andnot_acquire | |
| 1040 | #define atomic64_fetch_andnot_acquire(...) \ | |
| 1041 | __atomic_op_acquire(atomic64_fetch_andnot, __VA_ARGS__) | |
| 1042 | #endif | |
| 1043 | ||
| 1044 | #ifndef atomic64_fetch_andnot_release | |
| 1045 | #define atomic64_fetch_andnot_release(...) \ | |
| 1046 | __atomic_op_release(atomic64_fetch_andnot, __VA_ARGS__) | |
| 1047 | #endif | |
| 1048 | ||
| 1049 | #ifndef atomic64_fetch_andnot | |
| 1050 | #define atomic64_fetch_andnot(...) \ | |
| 1051 | __atomic_op_fence(atomic64_fetch_andnot, __VA_ARGS__) | |
| 1052 | #endif | |
| 1053 | #endif /* atomic64_fetch_andnot_relaxed */ | |
| 28aa2bda PZ |
1054 | |
| 1055 | /* atomic64_fetch_xor_relaxed */ | |
| 1056 | #ifndef atomic64_fetch_xor_relaxed | |
| 1057 | #define atomic64_fetch_xor_relaxed atomic64_fetch_xor | |
| 1058 | #define atomic64_fetch_xor_acquire atomic64_fetch_xor | |
| 1059 | #define atomic64_fetch_xor_release atomic64_fetch_xor | |
| 1060 | ||
| 1061 | #else /* atomic64_fetch_xor_relaxed */ | |
| 1062 | ||
| 1063 | #ifndef atomic64_fetch_xor_acquire | |
| 1064 | #define atomic64_fetch_xor_acquire(...) \ | |
| 1065 | __atomic_op_acquire(atomic64_fetch_xor, __VA_ARGS__) | |
| 1066 | #endif | |
| 1067 | ||
| 1068 | #ifndef atomic64_fetch_xor_release | |
| 1069 | #define atomic64_fetch_xor_release(...) \ | |
| 1070 | __atomic_op_release(atomic64_fetch_xor, __VA_ARGS__) | |
| 1071 | #endif | |
| 1072 | ||
| 1073 | #ifndef atomic64_fetch_xor | |
| 1074 | #define atomic64_fetch_xor(...) \ | |
| 1075 | __atomic_op_fence(atomic64_fetch_xor, __VA_ARGS__) | |
| 1076 | #endif | |
| 1077 | #endif /* atomic64_fetch_xor_relaxed */ | |
| 1078 | ||
| 1079 | ||
| e1213332 PZ |
1080 | /* atomic64_xchg_relaxed */ |
| 1081 | #ifndef atomic64_xchg_relaxed | |
| 1082 | #define atomic64_xchg_relaxed atomic64_xchg | |
| 1083 | #define atomic64_xchg_acquire atomic64_xchg | |
| 1084 | #define atomic64_xchg_release atomic64_xchg | |
| 1085 | ||
| 1086 | #else /* atomic64_xchg_relaxed */ | |
| 1087 | ||
| 1088 | #ifndef atomic64_xchg_acquire | |
| 1089 | #define atomic64_xchg_acquire(...) \ | |
| 1090 | __atomic_op_acquire(atomic64_xchg, __VA_ARGS__) | |
| 1091 | #endif | |
| 1092 | ||
| 1093 | #ifndef atomic64_xchg_release | |
| 1094 | #define atomic64_xchg_release(...) \ | |
| 1095 | __atomic_op_release(atomic64_xchg, __VA_ARGS__) | |
| 1096 | #endif | |
| 1097 | ||
| 1098 | #ifndef atomic64_xchg | |
| 1099 | #define atomic64_xchg(...) \ | |
| 1100 | __atomic_op_fence(atomic64_xchg, __VA_ARGS__) | |
| 1101 | #endif | |
| 1102 | #endif /* atomic64_xchg_relaxed */ | |
| 1103 | ||
| 1104 | /* atomic64_cmpxchg_relaxed */ | |
| 1105 | #ifndef atomic64_cmpxchg_relaxed | |
| 1106 | #define atomic64_cmpxchg_relaxed atomic64_cmpxchg | |
| 1107 | #define atomic64_cmpxchg_acquire atomic64_cmpxchg | |
| 1108 | #define atomic64_cmpxchg_release atomic64_cmpxchg | |
| 1109 | ||
| 1110 | #else /* atomic64_cmpxchg_relaxed */ | |
| 1111 | ||
| 1112 | #ifndef atomic64_cmpxchg_acquire | |
| 1113 | #define atomic64_cmpxchg_acquire(...) \ | |
| 1114 | __atomic_op_acquire(atomic64_cmpxchg, __VA_ARGS__) | |
| 1115 | #endif | |
| 1116 | ||
| 1117 | #ifndef atomic64_cmpxchg_release | |
| 1118 | #define atomic64_cmpxchg_release(...) \ | |
| 1119 | __atomic_op_release(atomic64_cmpxchg, __VA_ARGS__) | |
| 1120 | #endif | |
| 1121 | ||
| 1122 | #ifndef atomic64_cmpxchg | |
| 1123 | #define atomic64_cmpxchg(...) \ | |
| 1124 | __atomic_op_fence(atomic64_cmpxchg, __VA_ARGS__) | |
| 1125 | #endif | |
| 1126 | #endif /* atomic64_cmpxchg_relaxed */ | |
| 1127 | ||
| a9ebf306 PZ |
1128 | #ifndef atomic64_try_cmpxchg |
| 1129 | ||
| 1130 | #define __atomic64_try_cmpxchg(type, _p, _po, _n) \ | |
| 1131 | ({ \ | |
| 1132 | typeof(_po) __po = (_po); \ | |
| 44fe8445 PZ |
1133 | typeof(*(_po)) __r, __o = *__po; \ |
| 1134 | __r = atomic64_cmpxchg##type((_p), __o, (_n)); \ | |
| 1135 | if (unlikely(__r != __o)) \ | |
| 1136 | *__po = __r; \ | |
| 1137 | likely(__r == __o); \ | |
| a9ebf306 PZ |
1138 | }) |
| 1139 | ||
| 1140 | #define atomic64_try_cmpxchg(_p, _po, _n) __atomic64_try_cmpxchg(, _p, _po, _n) | |
| 1141 | #define atomic64_try_cmpxchg_relaxed(_p, _po, _n) __atomic64_try_cmpxchg(_relaxed, _p, _po, _n) | |
| 1142 | #define atomic64_try_cmpxchg_acquire(_p, _po, _n) __atomic64_try_cmpxchg(_acquire, _p, _po, _n) | |
| 1143 | #define atomic64_try_cmpxchg_release(_p, _po, _n) __atomic64_try_cmpxchg(_release, _p, _po, _n) | |
| 1144 | ||
| 1145 | #else /* atomic64_try_cmpxchg */ | |
| 1146 | #define atomic64_try_cmpxchg_relaxed atomic64_try_cmpxchg | |
| 1147 | #define atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg | |
| 1148 | #define atomic64_try_cmpxchg_release atomic64_try_cmpxchg | |
| 1149 | #endif /* atomic64_try_cmpxchg */ | |
| 1150 | ||
| 35670132 MR |
1151 | /** |
| 1152 | * atomic64_fetch_add_unless - add unless the number is already a given value | |
| 1153 | * @v: pointer of type atomic64_t | |
| 1154 | * @a: the amount to add to v... | |
| 1155 | * @u: ...unless v is equal to u. | |
| 1156 | * | |
| 1157 | * Atomically adds @a to @v, if @v was not already @u. | |
| 1158 | * Returns the original value of @v. | |
| 1159 | */ | |
| 1160 | #ifndef atomic64_fetch_add_unless | |
| 1161 | static inline long long atomic64_fetch_add_unless(atomic64_t *v, long long a, | |
| 1162 | long long u) | |
| 1163 | { | |
| 1164 | long long c = atomic64_read(v); | |
| 1165 | ||
| 1166 | do { | |
| 1167 | if (unlikely(c == u)) | |
| 1168 | break; | |
| 1169 | } while (!atomic64_try_cmpxchg(v, &c, c + a)); | |
| 1170 | ||
| 1171 | return c; | |
| 1172 | } | |
| 1173 | #endif | |
| 1174 | ||
| 0ae1d994 MR |
1175 | /** |
| 1176 | * atomic64_add_unless - add unless the number is already a given value | |
| 1177 | * @v: pointer of type atomic_t | |
| 1178 | * @a: the amount to add to v... | |
| 1179 | * @u: ...unless v is equal to u. | |
| 1180 | * | |
| 1181 | * Atomically adds @a to @v, if @v was not already @u. | |
| 1182 | * Returns true if the addition was done. | |
| 1183 | */ | |
| 0ae1d994 MR |
1184 | static inline bool atomic64_add_unless(atomic64_t *v, long long a, long long u) |
| 1185 | { | |
| 1186 | return atomic64_fetch_add_unless(v, a, u) != u; | |
| 1187 | } | |
| 0ae1d994 | 1188 | |
| bef82820 MR |
1189 | /** |
| 1190 | * atomic64_inc_not_zero - increment unless the number is zero | |
| 1191 | * @v: pointer of type atomic64_t | |
| 1192 | * | |
| 1193 | * Atomically increments @v by 1, if @v is non-zero. | |
| 1194 | * Returns true if the increment was done. | |
| 1195 | */ | |
| 1196 | #ifndef atomic64_inc_not_zero | |
| 1197 | #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) | |
| 1198 | #endif | |
| 1199 | ||
| 18cc1814 MR |
1200 | /** |
| 1201 | * atomic64_inc_and_test - increment and test | |
| 1202 | * @v: pointer of type atomic64_t | |
| 1203 | * | |
| 1204 | * Atomically increments @v by 1 | |
| 1205 | * and returns true if the result is zero, or false for all | |
| 1206 | * other cases. | |
| 1207 | */ | |
| 1208 | #ifndef atomic64_inc_and_test | |
| 1209 | static inline bool atomic64_inc_and_test(atomic64_t *v) | |
| 1210 | { | |
| 1211 | return atomic64_inc_return(v) == 0; | |
| 1212 | } | |
| 1213 | #endif | |
| 1214 | ||
| 1215 | /** | |
| 1216 | * atomic64_dec_and_test - decrement and test | |
| 1217 | * @v: pointer of type atomic64_t | |
| 1218 | * | |
| 1219 | * Atomically decrements @v by 1 and | |
| 1220 | * returns true if the result is 0, or false for all other | |
| 1221 | * cases. | |
| 1222 | */ | |
| 1223 | #ifndef atomic64_dec_and_test | |
| 1224 | static inline bool atomic64_dec_and_test(atomic64_t *v) | |
| 1225 | { | |
| 1226 | return atomic64_dec_return(v) == 0; | |
| 1227 | } | |
| 1228 | #endif | |
| 1229 | ||
| 1230 | /** | |
| 1231 | * atomic64_sub_and_test - subtract value from variable and test result | |
| 1232 | * @i: integer value to subtract | |
| 1233 | * @v: pointer of type atomic64_t | |
| 1234 | * | |
| 1235 | * Atomically subtracts @i from @v and returns | |
| 1236 | * true if the result is zero, or false for all | |
| 1237 | * other cases. | |
| 1238 | */ | |
| 1239 | #ifndef atomic64_sub_and_test | |
| 1240 | static inline bool atomic64_sub_and_test(long long i, atomic64_t *v) | |
| 1241 | { | |
| 1242 | return atomic64_sub_return(i, v) == 0; | |
| 1243 | } | |
| 1244 | #endif | |
| 1245 | ||
| 1246 | /** | |
| 1247 | * atomic64_add_negative - add and test if negative | |
| 1248 | * @i: integer value to add | |
| 1249 | * @v: pointer of type atomic64_t | |
| 1250 | * | |
| 1251 | * Atomically adds @i to @v and returns true | |
| 1252 | * if the result is negative, or false when | |
| 1253 | * result is greater than or equal to zero. | |
| 1254 | */ | |
| 1255 | #ifndef atomic64_add_negative | |
| 1256 | static inline bool atomic64_add_negative(long long i, atomic64_t *v) | |
| 1257 | { | |
| 1258 | return atomic64_add_return(i, v) < 0; | |
| 1259 | } | |
| 1260 | #endif | |
| 1261 | ||
| b3a2a05f MR |
1262 | #ifndef atomic64_inc_unless_negative |
| 1263 | static inline bool atomic64_inc_unless_negative(atomic64_t *v) | |
| 1264 | { | |
| 1265 | long long c = atomic64_read(v); | |
| 1266 | ||
| 1267 | do { | |
| 1268 | if (unlikely(c < 0)) | |
| 1269 | return false; | |
| 1270 | } while (!atomic64_try_cmpxchg(v, &c, c + 1)); | |
| 1271 | ||
| 1272 | return true; | |
| 1273 | } | |
| 1274 | #endif | |
| 1275 | ||
| 1276 | #ifndef atomic64_dec_unless_positive | |
| 1277 | static inline bool atomic64_dec_unless_positive(atomic64_t *v) | |
| 1278 | { | |
| 1279 | long long c = atomic64_read(v); | |
| 1280 | ||
| 1281 | do { | |
| 1282 | if (unlikely(c > 0)) | |
| 1283 | return false; | |
| 1284 | } while (!atomic64_try_cmpxchg(v, &c, c - 1)); | |
| 1285 | ||
| 1286 | return true; | |
| 1287 | } | |
| 1288 | #endif | |
| 1289 | ||
| 1290 | /* | |
| 1291 | * atomic64_dec_if_positive - decrement by 1 if old value positive | |
| 1292 | * @v: pointer of type atomic64_t | |
| 1293 | * | |
| 1294 | * The function returns the old value of *v minus 1, even if | |
| 1295 | * the atomic64 variable, v, was not decremented. | |
| 1296 | */ | |
| 1297 | #ifndef atomic64_dec_if_positive | |
| 1298 | static inline long long atomic64_dec_if_positive(atomic64_t *v) | |
| 1299 | { | |
| 1300 | long long dec, c = atomic64_read(v); | |
| 1301 | ||
| 1302 | do { | |
| 1303 | dec = c - 1; | |
| 1304 | if (unlikely(dec < 0)) | |
| 1305 | break; | |
| 1306 | } while (!atomic64_try_cmpxchg(v, &c, dec)); | |
| 1307 | ||
| 1308 | return dec; | |
| 1309 | } | |
| 1310 | #endif | |
| 1311 | ||
| fcfdfe30 | 1312 | #define atomic64_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c)) |
| 4df714be WD |
1313 | #define atomic64_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c)) |
| 1314 | ||
| 90fe6514 PZ |
1315 | #include <asm-generic/atomic-long.h> |
| 1316 | ||
| 3f9d35b9 | 1317 | #endif /* _LINUX_ATOMIC_H */ |