| 1 | #ifndef _URCU_UATOMIC_GENERIC_H |
| 2 | #define _URCU_UATOMIC_GENERIC_H |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved. |
| 6 | * Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved. |
| 7 | * Copyright (c) 1999-2004 Hewlett-Packard Development Company, L.P. |
| 8 | * Copyright (c) 2009 Mathieu Desnoyers |
| 9 | * Copyright (c) 2010 Paolo Bonzini |
| 10 | * |
| 11 | * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED |
| 12 | * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. |
| 13 | * |
| 14 | * Permission is hereby granted to use or copy this program |
| 15 | * for any purpose, provided the above notices are retained on all copies. |
| 16 | * Permission to modify the code and to distribute modified code is granted, |
| 17 | * provided the above notices are retained, and a notice that the code was |
| 18 | * modified is included with the above copyright notice. |
| 19 | * |
| 20 | * Code inspired from libuatomic_ops-1.2, inherited in part from the |
| 21 | * Boehm-Demers-Weiser conservative garbage collector. |
| 22 | */ |
| 23 | |
| 24 | #include <stdint.h> |
| 25 | #include <urcu/compiler.h> |
| 26 | #include <urcu/system.h> |
| 27 | |
| 28 | #ifdef __cplusplus |
| 29 | extern "C" { |
| 30 | #endif |
| 31 | |
| 32 | #ifndef uatomic_set |
| 33 | #define uatomic_set(addr, v) ((void) CMM_STORE_SHARED(*(addr), (v))) |
| 34 | #endif |
| 35 | |
| 36 | #ifndef uatomic_read |
| 37 | #define uatomic_read(addr) CMM_LOAD_SHARED(*(addr)) |
| 38 | #endif |
| 39 | |
| 40 | #if !defined __OPTIMIZE__ || defined UATOMIC_NO_LINK_ERROR |
| 41 | static inline __attribute__((always_inline)) |
| 42 | void _uatomic_link_error(void) |
| 43 | { |
| 44 | #ifdef ILLEGAL_INSTR |
| 45 | /* |
| 46 | * generate an illegal instruction. Cannot catch this with |
| 47 | * linker tricks when optimizations are disabled. |
| 48 | */ |
| 49 | __asm__ __volatile__(ILLEGAL_INSTR); |
| 50 | #else |
| 51 | __builtin_trap(); |
| 52 | #endif |
| 53 | } |
| 54 | |
| 55 | #else /* #if !defined __OPTIMIZE__ || defined UATOMIC_NO_LINK_ERROR */ |
| 56 | extern void _uatomic_link_error(void); |
| 57 | #endif /* #else #if !defined __OPTIMIZE__ || defined UATOMIC_NO_LINK_ERROR */ |
| 58 | |
| 59 | /* cmpxchg */ |
| 60 | |
| 61 | #ifndef uatomic_cmpxchg |
| 62 | static inline __attribute__((always_inline)) |
| 63 | unsigned long _uatomic_cmpxchg(void *addr, unsigned long old, |
| 64 | unsigned long _new, int len) |
| 65 | { |
| 66 | switch (len) { |
| 67 | #ifdef UATOMIC_HAS_ATOMIC_BYTE |
| 68 | case 1: |
| 69 | return __sync_val_compare_and_swap_1((uint8_t *) addr, old, |
| 70 | _new); |
| 71 | #endif |
| 72 | #ifdef UATOMIC_HAS_ATOMIC_SHORT |
| 73 | case 2: |
| 74 | return __sync_val_compare_and_swap_2((uint16_t *) addr, old, |
| 75 | _new); |
| 76 | #endif |
| 77 | case 4: |
| 78 | return __sync_val_compare_and_swap_4((uint32_t *) addr, old, |
| 79 | _new); |
| 80 | #if (CAA_BITS_PER_LONG == 64) |
| 81 | case 8: |
| 82 | return __sync_val_compare_and_swap_8((uint64_t *) addr, old, |
| 83 | _new); |
| 84 | #endif |
| 85 | } |
| 86 | _uatomic_link_error(); |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | |
| 91 | #define uatomic_cmpxchg(addr, old, _new) \ |
| 92 | ((__typeof__(*(addr))) _uatomic_cmpxchg((addr), \ |
| 93 | caa_cast_long_keep_sign(old), \ |
| 94 | caa_cast_long_keep_sign(_new),\ |
| 95 | sizeof(*(addr)))) |
| 96 | |
| 97 | |
| 98 | /* uatomic_and */ |
| 99 | |
| 100 | #ifndef uatomic_and |
| 101 | static inline __attribute__((always_inline)) |
| 102 | void _uatomic_and(void *addr, unsigned long val, |
| 103 | int len) |
| 104 | { |
| 105 | switch (len) { |
| 106 | #ifdef UATOMIC_HAS_ATOMIC_BYTE |
| 107 | case 1: |
| 108 | __sync_and_and_fetch_1((uint8_t *) addr, val); |
| 109 | return; |
| 110 | #endif |
| 111 | #ifdef UATOMIC_HAS_ATOMIC_SHORT |
| 112 | case 2: |
| 113 | __sync_and_and_fetch_2((uint16_t *) addr, val); |
| 114 | return; |
| 115 | #endif |
| 116 | case 4: |
| 117 | __sync_and_and_fetch_4((uint32_t *) addr, val); |
| 118 | return; |
| 119 | #if (CAA_BITS_PER_LONG == 64) |
| 120 | case 8: |
| 121 | __sync_and_and_fetch_8((uint64_t *) addr, val); |
| 122 | return; |
| 123 | #endif |
| 124 | } |
| 125 | _uatomic_link_error(); |
| 126 | } |
| 127 | |
| 128 | #define uatomic_and(addr, v) \ |
| 129 | (_uatomic_and((addr), \ |
| 130 | caa_cast_long_keep_sign(v), \ |
| 131 | sizeof(*(addr)))) |
| 132 | #define cmm_smp_mb__before_uatomic_and() cmm_barrier() |
| 133 | #define cmm_smp_mb__after_uatomic_and() cmm_barrier() |
| 134 | |
| 135 | #endif |
| 136 | |
| 137 | /* uatomic_or */ |
| 138 | |
| 139 | #ifndef uatomic_or |
| 140 | static inline __attribute__((always_inline)) |
| 141 | void _uatomic_or(void *addr, unsigned long val, |
| 142 | int len) |
| 143 | { |
| 144 | switch (len) { |
| 145 | #ifdef UATOMIC_HAS_ATOMIC_BYTE |
| 146 | case 1: |
| 147 | __sync_or_and_fetch_1((uint8_t *) addr, val); |
| 148 | return; |
| 149 | #endif |
| 150 | #ifdef UATOMIC_HAS_ATOMIC_SHORT |
| 151 | case 2: |
| 152 | __sync_or_and_fetch_2((uint16_t *) addr, val); |
| 153 | return; |
| 154 | #endif |
| 155 | case 4: |
| 156 | __sync_or_and_fetch_4((uint32_t *) addr, val); |
| 157 | return; |
| 158 | #if (CAA_BITS_PER_LONG == 64) |
| 159 | case 8: |
| 160 | __sync_or_and_fetch_8((uint64_t *) addr, val); |
| 161 | return; |
| 162 | #endif |
| 163 | } |
| 164 | _uatomic_link_error(); |
| 165 | return; |
| 166 | } |
| 167 | |
| 168 | #define uatomic_or(addr, v) \ |
| 169 | (_uatomic_or((addr), \ |
| 170 | caa_cast_long_keep_sign(v), \ |
| 171 | sizeof(*(addr)))) |
| 172 | #define cmm_smp_mb__before_uatomic_or() cmm_barrier() |
| 173 | #define cmm_smp_mb__after_uatomic_or() cmm_barrier() |
| 174 | |
| 175 | #endif |
| 176 | |
| 177 | |
| 178 | /* uatomic_add_return */ |
| 179 | |
| 180 | #ifndef uatomic_add_return |
| 181 | static inline __attribute__((always_inline)) |
| 182 | unsigned long _uatomic_add_return(void *addr, unsigned long val, |
| 183 | int len) |
| 184 | { |
| 185 | switch (len) { |
| 186 | #ifdef UATOMIC_HAS_ATOMIC_BYTE |
| 187 | case 1: |
| 188 | return __sync_add_and_fetch_1((uint8_t *) addr, val); |
| 189 | #endif |
| 190 | #ifdef UATOMIC_HAS_ATOMIC_SHORT |
| 191 | case 2: |
| 192 | return __sync_add_and_fetch_2((uint16_t *) addr, val); |
| 193 | #endif |
| 194 | case 4: |
| 195 | return __sync_add_and_fetch_4((uint32_t *) addr, val); |
| 196 | #if (CAA_BITS_PER_LONG == 64) |
| 197 | case 8: |
| 198 | return __sync_add_and_fetch_8((uint64_t *) addr, val); |
| 199 | #endif |
| 200 | } |
| 201 | _uatomic_link_error(); |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | |
| 206 | #define uatomic_add_return(addr, v) \ |
| 207 | ((__typeof__(*(addr))) _uatomic_add_return((addr), \ |
| 208 | caa_cast_long_keep_sign(v), \ |
| 209 | sizeof(*(addr)))) |
| 210 | #endif /* #ifndef uatomic_add_return */ |
| 211 | |
| 212 | #ifndef uatomic_xchg |
| 213 | /* xchg */ |
| 214 | |
| 215 | static inline __attribute__((always_inline)) |
| 216 | unsigned long _uatomic_exchange(void *addr, unsigned long val, int len) |
| 217 | { |
| 218 | switch (len) { |
| 219 | #ifdef UATOMIC_HAS_ATOMIC_BYTE |
| 220 | case 1: |
| 221 | { |
| 222 | uint8_t old; |
| 223 | |
| 224 | do { |
| 225 | old = uatomic_read((uint8_t *) addr); |
| 226 | } while (!__sync_bool_compare_and_swap_1((uint8_t *) addr, |
| 227 | old, val)); |
| 228 | |
| 229 | return old; |
| 230 | } |
| 231 | #endif |
| 232 | #ifdef UATOMIC_HAS_ATOMIC_SHORT |
| 233 | case 2: |
| 234 | { |
| 235 | uint16_t old; |
| 236 | |
| 237 | do { |
| 238 | old = uatomic_read((uint16_t *) addr); |
| 239 | } while (!__sync_bool_compare_and_swap_2((uint16_t *) addr, |
| 240 | old, val)); |
| 241 | |
| 242 | return old; |
| 243 | } |
| 244 | #endif |
| 245 | case 4: |
| 246 | { |
| 247 | uint32_t old; |
| 248 | |
| 249 | do { |
| 250 | old = uatomic_read((uint32_t *) addr); |
| 251 | } while (!__sync_bool_compare_and_swap_4((uint32_t *) addr, |
| 252 | old, val)); |
| 253 | |
| 254 | return old; |
| 255 | } |
| 256 | #if (CAA_BITS_PER_LONG == 64) |
| 257 | case 8: |
| 258 | { |
| 259 | uint64_t old; |
| 260 | |
| 261 | do { |
| 262 | old = uatomic_read((uint64_t *) addr); |
| 263 | } while (!__sync_bool_compare_and_swap_8((uint64_t *) addr, |
| 264 | old, val)); |
| 265 | |
| 266 | return old; |
| 267 | } |
| 268 | #endif |
| 269 | } |
| 270 | _uatomic_link_error(); |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | #define uatomic_xchg(addr, v) \ |
| 275 | ((__typeof__(*(addr))) _uatomic_exchange((addr), \ |
| 276 | caa_cast_long_keep_sign(v), \ |
| 277 | sizeof(*(addr)))) |
| 278 | #endif /* #ifndef uatomic_xchg */ |
| 279 | |
| 280 | #else /* #ifndef uatomic_cmpxchg */ |
| 281 | |
| 282 | #ifndef uatomic_and |
| 283 | /* uatomic_and */ |
| 284 | |
| 285 | static inline __attribute__((always_inline)) |
| 286 | void _uatomic_and(void *addr, unsigned long val, int len) |
| 287 | { |
| 288 | switch (len) { |
| 289 | #ifdef UATOMIC_HAS_ATOMIC_BYTE |
| 290 | case 1: |
| 291 | { |
| 292 | uint8_t old, oldt; |
| 293 | |
| 294 | oldt = uatomic_read((uint8_t *) addr); |
| 295 | do { |
| 296 | old = oldt; |
| 297 | oldt = _uatomic_cmpxchg(addr, old, old & val, 1); |
| 298 | } while (oldt != old); |
| 299 | |
| 300 | return; |
| 301 | } |
| 302 | #endif |
| 303 | #ifdef UATOMIC_HAS_ATOMIC_SHORT |
| 304 | case 2: |
| 305 | { |
| 306 | uint16_t old, oldt; |
| 307 | |
| 308 | oldt = uatomic_read((uint16_t *) addr); |
| 309 | do { |
| 310 | old = oldt; |
| 311 | oldt = _uatomic_cmpxchg(addr, old, old & val, 2); |
| 312 | } while (oldt != old); |
| 313 | } |
| 314 | #endif |
| 315 | case 4: |
| 316 | { |
| 317 | uint32_t old, oldt; |
| 318 | |
| 319 | oldt = uatomic_read((uint32_t *) addr); |
| 320 | do { |
| 321 | old = oldt; |
| 322 | oldt = _uatomic_cmpxchg(addr, old, old & val, 4); |
| 323 | } while (oldt != old); |
| 324 | |
| 325 | return; |
| 326 | } |
| 327 | #if (CAA_BITS_PER_LONG == 64) |
| 328 | case 8: |
| 329 | { |
| 330 | uint64_t old, oldt; |
| 331 | |
| 332 | oldt = uatomic_read((uint64_t *) addr); |
| 333 | do { |
| 334 | old = oldt; |
| 335 | oldt = _uatomic_cmpxchg(addr, old, old & val, 8); |
| 336 | } while (oldt != old); |
| 337 | |
| 338 | return; |
| 339 | } |
| 340 | #endif |
| 341 | } |
| 342 | _uatomic_link_error(); |
| 343 | } |
| 344 | |
| 345 | #define uatomic_and(addr, v) \ |
| 346 | (_uatomic_and((addr), \ |
| 347 | caa_cast_long_keep_sign(v), \ |
| 348 | sizeof(*(addr)))) |
| 349 | #define cmm_smp_mb__before_uatomic_and() cmm_barrier() |
| 350 | #define cmm_smp_mb__after_uatomic_and() cmm_barrier() |
| 351 | |
| 352 | #endif /* #ifndef uatomic_and */ |
| 353 | |
| 354 | #ifndef uatomic_or |
| 355 | /* uatomic_or */ |
| 356 | |
| 357 | static inline __attribute__((always_inline)) |
| 358 | void _uatomic_or(void *addr, unsigned long val, int len) |
| 359 | { |
| 360 | switch (len) { |
| 361 | #ifdef UATOMIC_HAS_ATOMIC_BYTE |
| 362 | case 1: |
| 363 | { |
| 364 | uint8_t old, oldt; |
| 365 | |
| 366 | oldt = uatomic_read((uint8_t *) addr); |
| 367 | do { |
| 368 | old = oldt; |
| 369 | oldt = _uatomic_cmpxchg(addr, old, old | val, 1); |
| 370 | } while (oldt != old); |
| 371 | |
| 372 | return; |
| 373 | } |
| 374 | #endif |
| 375 | #ifdef UATOMIC_HAS_ATOMIC_SHORT |
| 376 | case 2: |
| 377 | { |
| 378 | uint16_t old, oldt; |
| 379 | |
| 380 | oldt = uatomic_read((uint16_t *) addr); |
| 381 | do { |
| 382 | old = oldt; |
| 383 | oldt = _uatomic_cmpxchg(addr, old, old | val, 2); |
| 384 | } while (oldt != old); |
| 385 | |
| 386 | return; |
| 387 | } |
| 388 | #endif |
| 389 | case 4: |
| 390 | { |
| 391 | uint32_t old, oldt; |
| 392 | |
| 393 | oldt = uatomic_read((uint32_t *) addr); |
| 394 | do { |
| 395 | old = oldt; |
| 396 | oldt = _uatomic_cmpxchg(addr, old, old | val, 4); |
| 397 | } while (oldt != old); |
| 398 | |
| 399 | return; |
| 400 | } |
| 401 | #if (CAA_BITS_PER_LONG == 64) |
| 402 | case 8: |
| 403 | { |
| 404 | uint64_t old, oldt; |
| 405 | |
| 406 | oldt = uatomic_read((uint64_t *) addr); |
| 407 | do { |
| 408 | old = oldt; |
| 409 | oldt = _uatomic_cmpxchg(addr, old, old | val, 8); |
| 410 | } while (oldt != old); |
| 411 | |
| 412 | return; |
| 413 | } |
| 414 | #endif |
| 415 | } |
| 416 | _uatomic_link_error(); |
| 417 | } |
| 418 | |
| 419 | #define uatomic_or(addr, v) \ |
| 420 | (_uatomic_or((addr), \ |
| 421 | caa_cast_long_keep_sign(v), \ |
| 422 | sizeof(*(addr)))) |
| 423 | #define cmm_smp_mb__before_uatomic_or() cmm_barrier() |
| 424 | #define cmm_smp_mb__after_uatomic_or() cmm_barrier() |
| 425 | |
| 426 | #endif /* #ifndef uatomic_or */ |
| 427 | |
| 428 | #ifndef uatomic_add_return |
| 429 | /* uatomic_add_return */ |
| 430 | |
| 431 | static inline __attribute__((always_inline)) |
| 432 | unsigned long _uatomic_add_return(void *addr, unsigned long val, int len) |
| 433 | { |
| 434 | switch (len) { |
| 435 | #ifdef UATOMIC_HAS_ATOMIC_BYTE |
| 436 | case 1: |
| 437 | { |
| 438 | uint8_t old, oldt; |
| 439 | |
| 440 | oldt = uatomic_read((uint8_t *) addr); |
| 441 | do { |
| 442 | old = oldt; |
| 443 | oldt = uatomic_cmpxchg((uint8_t *) addr, |
| 444 | old, old + val); |
| 445 | } while (oldt != old); |
| 446 | |
| 447 | return old + val; |
| 448 | } |
| 449 | #endif |
| 450 | #ifdef UATOMIC_HAS_ATOMIC_SHORT |
| 451 | case 2: |
| 452 | { |
| 453 | uint16_t old, oldt; |
| 454 | |
| 455 | oldt = uatomic_read((uint16_t *) addr); |
| 456 | do { |
| 457 | old = oldt; |
| 458 | oldt = uatomic_cmpxchg((uint16_t *) addr, |
| 459 | old, old + val); |
| 460 | } while (oldt != old); |
| 461 | |
| 462 | return old + val; |
| 463 | } |
| 464 | #endif |
| 465 | case 4: |
| 466 | { |
| 467 | uint32_t old, oldt; |
| 468 | |
| 469 | oldt = uatomic_read((uint32_t *) addr); |
| 470 | do { |
| 471 | old = oldt; |
| 472 | oldt = uatomic_cmpxchg((uint32_t *) addr, |
| 473 | old, old + val); |
| 474 | } while (oldt != old); |
| 475 | |
| 476 | return old + val; |
| 477 | } |
| 478 | #if (CAA_BITS_PER_LONG == 64) |
| 479 | case 8: |
| 480 | { |
| 481 | uint64_t old, oldt; |
| 482 | |
| 483 | oldt = uatomic_read((uint64_t *) addr); |
| 484 | do { |
| 485 | old = oldt; |
| 486 | oldt = uatomic_cmpxchg((uint64_t *) addr, |
| 487 | old, old + val); |
| 488 | } while (oldt != old); |
| 489 | |
| 490 | return old + val; |
| 491 | } |
| 492 | #endif |
| 493 | } |
| 494 | _uatomic_link_error(); |
| 495 | return 0; |
| 496 | } |
| 497 | |
| 498 | #define uatomic_add_return(addr, v) \ |
| 499 | ((__typeof__(*(addr))) _uatomic_add_return((addr), \ |
| 500 | caa_cast_long_keep_sign(v), \ |
| 501 | sizeof(*(addr)))) |
| 502 | #endif /* #ifndef uatomic_add_return */ |
| 503 | |
| 504 | #ifndef uatomic_xchg |
| 505 | /* xchg */ |
| 506 | |
| 507 | static inline __attribute__((always_inline)) |
| 508 | unsigned long _uatomic_exchange(void *addr, unsigned long val, int len) |
| 509 | { |
| 510 | switch (len) { |
| 511 | #ifdef UATOMIC_HAS_ATOMIC_BYTE |
| 512 | case 1: |
| 513 | { |
| 514 | uint8_t old, oldt; |
| 515 | |
| 516 | oldt = uatomic_read((uint8_t *) addr); |
| 517 | do { |
| 518 | old = oldt; |
| 519 | oldt = uatomic_cmpxchg((uint8_t *) addr, |
| 520 | old, val); |
| 521 | } while (oldt != old); |
| 522 | |
| 523 | return old; |
| 524 | } |
| 525 | #endif |
| 526 | #ifdef UATOMIC_HAS_ATOMIC_SHORT |
| 527 | case 2: |
| 528 | { |
| 529 | uint16_t old, oldt; |
| 530 | |
| 531 | oldt = uatomic_read((uint16_t *) addr); |
| 532 | do { |
| 533 | old = oldt; |
| 534 | oldt = uatomic_cmpxchg((uint16_t *) addr, |
| 535 | old, val); |
| 536 | } while (oldt != old); |
| 537 | |
| 538 | return old; |
| 539 | } |
| 540 | #endif |
| 541 | case 4: |
| 542 | { |
| 543 | uint32_t old, oldt; |
| 544 | |
| 545 | oldt = uatomic_read((uint32_t *) addr); |
| 546 | do { |
| 547 | old = oldt; |
| 548 | oldt = uatomic_cmpxchg((uint32_t *) addr, |
| 549 | old, val); |
| 550 | } while (oldt != old); |
| 551 | |
| 552 | return old; |
| 553 | } |
| 554 | #if (CAA_BITS_PER_LONG == 64) |
| 555 | case 8: |
| 556 | { |
| 557 | uint64_t old, oldt; |
| 558 | |
| 559 | oldt = uatomic_read((uint64_t *) addr); |
| 560 | do { |
| 561 | old = oldt; |
| 562 | oldt = uatomic_cmpxchg((uint64_t *) addr, |
| 563 | old, val); |
| 564 | } while (oldt != old); |
| 565 | |
| 566 | return old; |
| 567 | } |
| 568 | #endif |
| 569 | } |
| 570 | _uatomic_link_error(); |
| 571 | return 0; |
| 572 | } |
| 573 | |
| 574 | #define uatomic_xchg(addr, v) \ |
| 575 | ((__typeof__(*(addr))) _uatomic_exchange((addr), \ |
| 576 | caa_cast_long_keep_sign(v), \ |
| 577 | sizeof(*(addr)))) |
| 578 | #endif /* #ifndef uatomic_xchg */ |
| 579 | |
| 580 | #endif /* #else #ifndef uatomic_cmpxchg */ |
| 581 | |
| 582 | /* uatomic_sub_return, uatomic_add, uatomic_sub, uatomic_inc, uatomic_dec */ |
| 583 | |
| 584 | #ifndef uatomic_add |
| 585 | #define uatomic_add(addr, v) (void)uatomic_add_return((addr), (v)) |
| 586 | #define cmm_smp_mb__before_uatomic_add() cmm_barrier() |
| 587 | #define cmm_smp_mb__after_uatomic_add() cmm_barrier() |
| 588 | #endif |
| 589 | |
| 590 | #define uatomic_sub_return(addr, v) \ |
| 591 | uatomic_add_return((addr), -(caa_cast_long_keep_sign(v))) |
| 592 | #define uatomic_sub(addr, v) \ |
| 593 | uatomic_add((addr), -(caa_cast_long_keep_sign(v))) |
| 594 | #define cmm_smp_mb__before_uatomic_sub() cmm_smp_mb__before_uatomic_add() |
| 595 | #define cmm_smp_mb__after_uatomic_sub() cmm_smp_mb__after_uatomic_add() |
| 596 | |
| 597 | #ifndef uatomic_inc |
| 598 | #define uatomic_inc(addr) uatomic_add((addr), 1) |
| 599 | #define cmm_smp_mb__before_uatomic_inc() cmm_smp_mb__before_uatomic_add() |
| 600 | #define cmm_smp_mb__after_uatomic_inc() cmm_smp_mb__after_uatomic_add() |
| 601 | #endif |
| 602 | |
| 603 | #ifndef uatomic_dec |
| 604 | #define uatomic_dec(addr) uatomic_add((addr), -1) |
| 605 | #define cmm_smp_mb__before_uatomic_dec() cmm_smp_mb__before_uatomic_add() |
| 606 | #define cmm_smp_mb__after_uatomic_dec() cmm_smp_mb__after_uatomic_add() |
| 607 | #endif |
| 608 | |
| 609 | #ifdef __cplusplus |
| 610 | } |
| 611 | #endif |
| 612 | |
| 613 | #endif /* _URCU_UATOMIC_GENERIC_H */ |