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1 /* Atomic operations usable in machine independent code */
2 #ifndef _LINUX_ATOMIC_H
3 #define _LINUX_ATOMIC_H
4 #include <asm/atomic.h>
5 #include <asm/barrier.h>
8 * Relaxed variants of xchg, cmpxchg and some atomic operations.
10 * We support four variants:
12 * - Fully ordered: The default implementation, no suffix required.
13 * - Acquire: Provides ACQUIRE semantics, _acquire suffix.
14 * - Release: Provides RELEASE semantics, _release suffix.
15 * - Relaxed: No ordering guarantees, _relaxed suffix.
17 * For compound atomics performing both a load and a store, ACQUIRE
18 * semantics apply only to the load and RELEASE semantics only to the
19 * store portion of the operation. Note that a failed cmpxchg_acquire
20 * does -not- imply any memory ordering constraints.
22 * See Documentation/memory-barriers.txt for ACQUIRE/RELEASE definitions.
25 #ifndef atomic_read_acquire
26 #define atomic_read_acquire(v) smp_load_acquire(&(v)->counter)
29 #ifndef atomic_set_release
30 #define atomic_set_release(v, i) smp_store_release(&(v)->counter, (i))
34 * The idea here is to build acquire/release variants by adding explicit
35 * barriers on top of the relaxed variant. In the case where the relaxed
36 * variant is already fully ordered, no additional barriers are needed.
38 * Besides, if an arch has a special barrier for acquire/release, it could
39 * implement its own __atomic_op_* and use the same framework for building
42 #ifndef __atomic_op_acquire
43 #define __atomic_op_acquire(op, args...) \
45 typeof(op##_relaxed(args)) __ret = op##_relaxed(args); \
46 smp_mb__after_atomic(); \
51 #ifndef __atomic_op_release
52 #define __atomic_op_release(op, args...) \
54 smp_mb__before_atomic(); \
59 #ifndef __atomic_op_fence
60 #define __atomic_op_fence(op, args...) \
62 typeof(op##_relaxed(args)) __ret; \
63 smp_mb__before_atomic(); \
64 __ret = op##_relaxed(args); \
65 smp_mb__after_atomic(); \
70 /* atomic_add_return_relaxed */
71 #ifndef atomic_add_return_relaxed
72 #define atomic_add_return_relaxed atomic_add_return
73 #define atomic_add_return_acquire atomic_add_return
74 #define atomic_add_return_release atomic_add_return
76 #else /* atomic_add_return_relaxed */
78 #ifndef atomic_add_return_acquire
79 #define atomic_add_return_acquire(...) \
80 __atomic_op_acquire(atomic_add_return, __VA_ARGS__)
83 #ifndef atomic_add_return_release
84 #define atomic_add_return_release(...) \
85 __atomic_op_release(atomic_add_return, __VA_ARGS__)
88 #ifndef atomic_add_return
89 #define atomic_add_return(...) \
90 __atomic_op_fence(atomic_add_return, __VA_ARGS__)
92 #endif /* atomic_add_return_relaxed */
94 /* atomic_inc_return_relaxed */
95 #ifndef atomic_inc_return_relaxed
96 #define atomic_inc_return_relaxed atomic_inc_return
97 #define atomic_inc_return_acquire atomic_inc_return
98 #define atomic_inc_return_release atomic_inc_return
100 #else /* atomic_inc_return_relaxed */
102 #ifndef atomic_inc_return_acquire
103 #define atomic_inc_return_acquire(...) \
104 __atomic_op_acquire(atomic_inc_return, __VA_ARGS__)
107 #ifndef atomic_inc_return_release
108 #define atomic_inc_return_release(...) \
109 __atomic_op_release(atomic_inc_return, __VA_ARGS__)
112 #ifndef atomic_inc_return
113 #define atomic_inc_return(...) \
114 __atomic_op_fence(atomic_inc_return, __VA_ARGS__)
116 #endif /* atomic_inc_return_relaxed */
118 /* atomic_sub_return_relaxed */
119 #ifndef atomic_sub_return_relaxed
120 #define atomic_sub_return_relaxed atomic_sub_return
121 #define atomic_sub_return_acquire atomic_sub_return
122 #define atomic_sub_return_release atomic_sub_return
124 #else /* atomic_sub_return_relaxed */
126 #ifndef atomic_sub_return_acquire
127 #define atomic_sub_return_acquire(...) \
128 __atomic_op_acquire(atomic_sub_return, __VA_ARGS__)
131 #ifndef atomic_sub_return_release
132 #define atomic_sub_return_release(...) \
133 __atomic_op_release(atomic_sub_return, __VA_ARGS__)
136 #ifndef atomic_sub_return
137 #define atomic_sub_return(...) \
138 __atomic_op_fence(atomic_sub_return, __VA_ARGS__)
140 #endif /* atomic_sub_return_relaxed */
142 /* atomic_dec_return_relaxed */
143 #ifndef atomic_dec_return_relaxed
144 #define atomic_dec_return_relaxed atomic_dec_return
145 #define atomic_dec_return_acquire atomic_dec_return
146 #define atomic_dec_return_release atomic_dec_return
148 #else /* atomic_dec_return_relaxed */
150 #ifndef atomic_dec_return_acquire
151 #define atomic_dec_return_acquire(...) \
152 __atomic_op_acquire(atomic_dec_return, __VA_ARGS__)
155 #ifndef atomic_dec_return_release
156 #define atomic_dec_return_release(...) \
157 __atomic_op_release(atomic_dec_return, __VA_ARGS__)
160 #ifndef atomic_dec_return
161 #define atomic_dec_return(...) \
162 __atomic_op_fence(atomic_dec_return, __VA_ARGS__)
164 #endif /* atomic_dec_return_relaxed */
167 /* atomic_fetch_add_relaxed */
168 #ifndef atomic_fetch_add_relaxed
169 #define atomic_fetch_add_relaxed atomic_fetch_add
170 #define atomic_fetch_add_acquire atomic_fetch_add
171 #define atomic_fetch_add_release atomic_fetch_add
173 #else /* atomic_fetch_add_relaxed */
175 #ifndef atomic_fetch_add_acquire
176 #define atomic_fetch_add_acquire(...) \
177 __atomic_op_acquire(atomic_fetch_add, __VA_ARGS__)
180 #ifndef atomic_fetch_add_release
181 #define atomic_fetch_add_release(...) \
182 __atomic_op_release(atomic_fetch_add, __VA_ARGS__)
185 #ifndef atomic_fetch_add
186 #define atomic_fetch_add(...) \
187 __atomic_op_fence(atomic_fetch_add, __VA_ARGS__)
189 #endif /* atomic_fetch_add_relaxed */
191 /* atomic_fetch_inc_relaxed */
192 #ifndef atomic_fetch_inc_relaxed
194 #ifndef atomic_fetch_inc
195 #define atomic_fetch_inc(v) atomic_fetch_add(1, (v))
196 #define atomic_fetch_inc_relaxed(v) atomic_fetch_add_relaxed(1, (v))
197 #define atomic_fetch_inc_acquire(v) atomic_fetch_add_acquire(1, (v))
198 #define atomic_fetch_inc_release(v) atomic_fetch_add_release(1, (v))
199 #else /* atomic_fetch_inc */
200 #define atomic_fetch_inc_relaxed atomic_fetch_inc
201 #define atomic_fetch_inc_acquire atomic_fetch_inc
202 #define atomic_fetch_inc_release atomic_fetch_inc
203 #endif /* atomic_fetch_inc */
205 #else /* atomic_fetch_inc_relaxed */
207 #ifndef atomic_fetch_inc_acquire
208 #define atomic_fetch_inc_acquire(...) \
209 __atomic_op_acquire(atomic_fetch_inc, __VA_ARGS__)
212 #ifndef atomic_fetch_inc_release
213 #define atomic_fetch_inc_release(...) \
214 __atomic_op_release(atomic_fetch_inc, __VA_ARGS__)
217 #ifndef atomic_fetch_inc
218 #define atomic_fetch_inc(...) \
219 __atomic_op_fence(atomic_fetch_inc, __VA_ARGS__)
221 #endif /* atomic_fetch_inc_relaxed */
223 /* atomic_fetch_sub_relaxed */
224 #ifndef atomic_fetch_sub_relaxed
225 #define atomic_fetch_sub_relaxed atomic_fetch_sub
226 #define atomic_fetch_sub_acquire atomic_fetch_sub
227 #define atomic_fetch_sub_release atomic_fetch_sub
229 #else /* atomic_fetch_sub_relaxed */
231 #ifndef atomic_fetch_sub_acquire
232 #define atomic_fetch_sub_acquire(...) \
233 __atomic_op_acquire(atomic_fetch_sub, __VA_ARGS__)
236 #ifndef atomic_fetch_sub_release
237 #define atomic_fetch_sub_release(...) \
238 __atomic_op_release(atomic_fetch_sub, __VA_ARGS__)
241 #ifndef atomic_fetch_sub
242 #define atomic_fetch_sub(...) \
243 __atomic_op_fence(atomic_fetch_sub, __VA_ARGS__)
245 #endif /* atomic_fetch_sub_relaxed */
247 /* atomic_fetch_dec_relaxed */
248 #ifndef atomic_fetch_dec_relaxed
250 #ifndef atomic_fetch_dec
251 #define atomic_fetch_dec(v) atomic_fetch_sub(1, (v))
252 #define atomic_fetch_dec_relaxed(v) atomic_fetch_sub_relaxed(1, (v))
253 #define atomic_fetch_dec_acquire(v) atomic_fetch_sub_acquire(1, (v))
254 #define atomic_fetch_dec_release(v) atomic_fetch_sub_release(1, (v))
255 #else /* atomic_fetch_dec */
256 #define atomic_fetch_dec_relaxed atomic_fetch_dec
257 #define atomic_fetch_dec_acquire atomic_fetch_dec
258 #define atomic_fetch_dec_release atomic_fetch_dec
259 #endif /* atomic_fetch_dec */
261 #else /* atomic_fetch_dec_relaxed */
263 #ifndef atomic_fetch_dec_acquire
264 #define atomic_fetch_dec_acquire(...) \
265 __atomic_op_acquire(atomic_fetch_dec, __VA_ARGS__)
268 #ifndef atomic_fetch_dec_release
269 #define atomic_fetch_dec_release(...) \
270 __atomic_op_release(atomic_fetch_dec, __VA_ARGS__)
273 #ifndef atomic_fetch_dec
274 #define atomic_fetch_dec(...) \
275 __atomic_op_fence(atomic_fetch_dec, __VA_ARGS__)
277 #endif /* atomic_fetch_dec_relaxed */
279 /* atomic_fetch_or_relaxed */
280 #ifndef atomic_fetch_or_relaxed
281 #define atomic_fetch_or_relaxed atomic_fetch_or
282 #define atomic_fetch_or_acquire atomic_fetch_or
283 #define atomic_fetch_or_release atomic_fetch_or
285 #else /* atomic_fetch_or_relaxed */
287 #ifndef atomic_fetch_or_acquire
288 #define atomic_fetch_or_acquire(...) \
289 __atomic_op_acquire(atomic_fetch_or, __VA_ARGS__)
292 #ifndef atomic_fetch_or_release
293 #define atomic_fetch_or_release(...) \
294 __atomic_op_release(atomic_fetch_or, __VA_ARGS__)
297 #ifndef atomic_fetch_or
298 #define atomic_fetch_or(...) \
299 __atomic_op_fence(atomic_fetch_or, __VA_ARGS__)
301 #endif /* atomic_fetch_or_relaxed */
303 /* atomic_fetch_and_relaxed */
304 #ifndef atomic_fetch_and_relaxed
305 #define atomic_fetch_and_relaxed atomic_fetch_and
306 #define atomic_fetch_and_acquire atomic_fetch_and
307 #define atomic_fetch_and_release atomic_fetch_and
309 #else /* atomic_fetch_and_relaxed */
311 #ifndef atomic_fetch_and_acquire
312 #define atomic_fetch_and_acquire(...) \
313 __atomic_op_acquire(atomic_fetch_and, __VA_ARGS__)
316 #ifndef atomic_fetch_and_release
317 #define atomic_fetch_and_release(...) \
318 __atomic_op_release(atomic_fetch_and, __VA_ARGS__)
321 #ifndef atomic_fetch_and
322 #define atomic_fetch_and(...) \
323 __atomic_op_fence(atomic_fetch_and, __VA_ARGS__)
325 #endif /* atomic_fetch_and_relaxed */
328 /* atomic_fetch_andnot_relaxed */
329 #ifndef atomic_fetch_andnot_relaxed
330 #define atomic_fetch_andnot_relaxed atomic_fetch_andnot
331 #define atomic_fetch_andnot_acquire atomic_fetch_andnot
332 #define atomic_fetch_andnot_release atomic_fetch_andnot
334 #else /* atomic_fetch_andnot_relaxed */
336 #ifndef atomic_fetch_andnot_acquire
337 #define atomic_fetch_andnot_acquire(...) \
338 __atomic_op_acquire(atomic_fetch_andnot, __VA_ARGS__)
341 #ifndef atomic_fetch_andnot_release
342 #define atomic_fetch_andnot_release(...) \
343 __atomic_op_release(atomic_fetch_andnot, __VA_ARGS__)
346 #ifndef atomic_fetch_andnot
347 #define atomic_fetch_andnot(...) \
348 __atomic_op_fence(atomic_fetch_andnot, __VA_ARGS__)
350 #endif /* atomic_fetch_andnot_relaxed */
351 #endif /* atomic_andnot */
353 /* atomic_fetch_xor_relaxed */
354 #ifndef atomic_fetch_xor_relaxed
355 #define atomic_fetch_xor_relaxed atomic_fetch_xor
356 #define atomic_fetch_xor_acquire atomic_fetch_xor
357 #define atomic_fetch_xor_release atomic_fetch_xor
359 #else /* atomic_fetch_xor_relaxed */
361 #ifndef atomic_fetch_xor_acquire
362 #define atomic_fetch_xor_acquire(...) \
363 __atomic_op_acquire(atomic_fetch_xor, __VA_ARGS__)
366 #ifndef atomic_fetch_xor_release
367 #define atomic_fetch_xor_release(...) \
368 __atomic_op_release(atomic_fetch_xor, __VA_ARGS__)
371 #ifndef atomic_fetch_xor
372 #define atomic_fetch_xor(...) \
373 __atomic_op_fence(atomic_fetch_xor, __VA_ARGS__)
375 #endif /* atomic_fetch_xor_relaxed */
378 /* atomic_xchg_relaxed */
379 #ifndef atomic_xchg_relaxed
380 #define atomic_xchg_relaxed atomic_xchg
381 #define atomic_xchg_acquire atomic_xchg
382 #define atomic_xchg_release atomic_xchg
384 #else /* atomic_xchg_relaxed */
386 #ifndef atomic_xchg_acquire
387 #define atomic_xchg_acquire(...) \
388 __atomic_op_acquire(atomic_xchg, __VA_ARGS__)
391 #ifndef atomic_xchg_release
392 #define atomic_xchg_release(...) \
393 __atomic_op_release(atomic_xchg, __VA_ARGS__)
397 #define atomic_xchg(...) \
398 __atomic_op_fence(atomic_xchg, __VA_ARGS__)
400 #endif /* atomic_xchg_relaxed */
402 /* atomic_cmpxchg_relaxed */
403 #ifndef atomic_cmpxchg_relaxed
404 #define atomic_cmpxchg_relaxed atomic_cmpxchg
405 #define atomic_cmpxchg_acquire atomic_cmpxchg
406 #define atomic_cmpxchg_release atomic_cmpxchg
408 #else /* atomic_cmpxchg_relaxed */
410 #ifndef atomic_cmpxchg_acquire
411 #define atomic_cmpxchg_acquire(...) \
412 __atomic_op_acquire(atomic_cmpxchg, __VA_ARGS__)
415 #ifndef atomic_cmpxchg_release
416 #define atomic_cmpxchg_release(...) \
417 __atomic_op_release(atomic_cmpxchg, __VA_ARGS__)
420 #ifndef atomic_cmpxchg
421 #define atomic_cmpxchg(...) \
422 __atomic_op_fence(atomic_cmpxchg, __VA_ARGS__)
424 #endif /* atomic_cmpxchg_relaxed */
426 #ifndef atomic_try_cmpxchg
428 #define __atomic_try_cmpxchg(type, _p, _po, _n) \
430 typeof(_po) __po = (_po); \
431 typeof(*(_po)) __r, __o = *__po; \
432 __r = atomic_cmpxchg##type((_p), __o, (_n)); \
433 if (unlikely(__r != __o)) \
435 likely(__r == __o); \
438 #define atomic_try_cmpxchg(_p, _po, _n) __atomic_try_cmpxchg(, _p, _po, _n)
439 #define atomic_try_cmpxchg_relaxed(_p, _po, _n) __atomic_try_cmpxchg(_relaxed, _p, _po, _n)
440 #define atomic_try_cmpxchg_acquire(_p, _po, _n) __atomic_try_cmpxchg(_acquire, _p, _po, _n)
441 #define atomic_try_cmpxchg_release(_p, _po, _n) __atomic_try_cmpxchg(_release, _p, _po, _n)
443 #else /* atomic_try_cmpxchg */
444 #define atomic_try_cmpxchg_relaxed atomic_try_cmpxchg
445 #define atomic_try_cmpxchg_acquire atomic_try_cmpxchg
446 #define atomic_try_cmpxchg_release atomic_try_cmpxchg
447 #endif /* atomic_try_cmpxchg */
449 /* cmpxchg_relaxed */
450 #ifndef cmpxchg_relaxed
451 #define cmpxchg_relaxed cmpxchg
452 #define cmpxchg_acquire cmpxchg
453 #define cmpxchg_release cmpxchg
455 #else /* cmpxchg_relaxed */
457 #ifndef cmpxchg_acquire
458 #define cmpxchg_acquire(...) \
459 __atomic_op_acquire(cmpxchg, __VA_ARGS__)
462 #ifndef cmpxchg_release
463 #define cmpxchg_release(...) \
464 __atomic_op_release(cmpxchg, __VA_ARGS__)
468 #define cmpxchg(...) \
469 __atomic_op_fence(cmpxchg, __VA_ARGS__)
471 #endif /* cmpxchg_relaxed */
473 /* cmpxchg64_relaxed */
474 #ifndef cmpxchg64_relaxed
475 #define cmpxchg64_relaxed cmpxchg64
476 #define cmpxchg64_acquire cmpxchg64
477 #define cmpxchg64_release cmpxchg64
479 #else /* cmpxchg64_relaxed */
481 #ifndef cmpxchg64_acquire
482 #define cmpxchg64_acquire(...) \
483 __atomic_op_acquire(cmpxchg64, __VA_ARGS__)
486 #ifndef cmpxchg64_release
487 #define cmpxchg64_release(...) \
488 __atomic_op_release(cmpxchg64, __VA_ARGS__)
492 #define cmpxchg64(...) \
493 __atomic_op_fence(cmpxchg64, __VA_ARGS__)
495 #endif /* cmpxchg64_relaxed */
499 #define xchg_relaxed xchg
500 #define xchg_acquire xchg
501 #define xchg_release xchg
503 #else /* xchg_relaxed */
506 #define xchg_acquire(...) __atomic_op_acquire(xchg, __VA_ARGS__)
510 #define xchg_release(...) __atomic_op_release(xchg, __VA_ARGS__)
514 #define xchg(...) __atomic_op_fence(xchg, __VA_ARGS__)
516 #endif /* xchg_relaxed */
519 * atomic_add_unless - add unless the number is already a given value
520 * @v: pointer of type atomic_t
521 * @a: the amount to add to v...
522 * @u: ...unless v is equal to u.
524 * Atomically adds @a to @v, so long as @v was not already @u.
525 * Returns non-zero if @v was not @u, and zero otherwise.
527 static inline int atomic_add_unless(atomic_t
*v
, int a
, int u
)
529 return __atomic_add_unless(v
, a
, u
) != u
;
533 * atomic_inc_not_zero - increment unless the number is zero
534 * @v: pointer of type atomic_t
536 * Atomically increments @v by 1, so long as @v is non-zero.
537 * Returns non-zero if @v was non-zero, and zero otherwise.
539 #ifndef atomic_inc_not_zero
540 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
543 #ifndef atomic_andnot
544 static inline void atomic_andnot(int i
, atomic_t
*v
)
549 static inline int atomic_fetch_andnot(int i
, atomic_t
*v
)
551 return atomic_fetch_and(~i
, v
);
554 static inline int atomic_fetch_andnot_relaxed(int i
, atomic_t
*v
)
556 return atomic_fetch_and_relaxed(~i
, v
);
559 static inline int atomic_fetch_andnot_acquire(int i
, atomic_t
*v
)
561 return atomic_fetch_and_acquire(~i
, v
);
564 static inline int atomic_fetch_andnot_release(int i
, atomic_t
*v
)
566 return atomic_fetch_and_release(~i
, v
);
571 * atomic_inc_not_zero_hint - increment if not null
572 * @v: pointer of type atomic_t
573 * @hint: probable value of the atomic before the increment
575 * This version of atomic_inc_not_zero() gives a hint of probable
576 * value of the atomic. This helps processor to not read the memory
577 * before doing the atomic read/modify/write cycle, lowering
578 * number of bus transactions on some arches.
580 * Returns: 0 if increment was not done, 1 otherwise.
582 #ifndef atomic_inc_not_zero_hint
583 static inline int atomic_inc_not_zero_hint(atomic_t
*v
, int hint
)
587 /* sanity test, should be removed by compiler if hint is a constant */
589 return atomic_inc_not_zero(v
);
592 val
= atomic_cmpxchg(v
, c
, c
+ 1);
602 #ifndef atomic_inc_unless_negative
603 static inline int atomic_inc_unless_negative(atomic_t
*p
)
606 for (v
= 0; v
>= 0; v
= v1
) {
607 v1
= atomic_cmpxchg(p
, v
, v
+ 1);
615 #ifndef atomic_dec_unless_positive
616 static inline int atomic_dec_unless_positive(atomic_t
*p
)
619 for (v
= 0; v
<= 0; v
= v1
) {
620 v1
= atomic_cmpxchg(p
, v
, v
- 1);
629 * atomic_dec_if_positive - decrement by 1 if old value positive
630 * @v: pointer of type atomic_t
632 * The function returns the old value of *v minus 1, even if
633 * the atomic variable, v, was not decremented.
635 #ifndef atomic_dec_if_positive
636 static inline int atomic_dec_if_positive(atomic_t
*v
)
642 if (unlikely(dec
< 0))
644 old
= atomic_cmpxchg((v
), c
, dec
);
645 if (likely(old
== c
))
653 #define atomic_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c))
655 #ifdef CONFIG_GENERIC_ATOMIC64
656 #include <asm-generic/atomic64.h>
659 #ifndef atomic64_read_acquire
660 #define atomic64_read_acquire(v) smp_load_acquire(&(v)->counter)
663 #ifndef atomic64_set_release
664 #define atomic64_set_release(v, i) smp_store_release(&(v)->counter, (i))
667 /* atomic64_add_return_relaxed */
668 #ifndef atomic64_add_return_relaxed
669 #define atomic64_add_return_relaxed atomic64_add_return
670 #define atomic64_add_return_acquire atomic64_add_return
671 #define atomic64_add_return_release atomic64_add_return
673 #else /* atomic64_add_return_relaxed */
675 #ifndef atomic64_add_return_acquire
676 #define atomic64_add_return_acquire(...) \
677 __atomic_op_acquire(atomic64_add_return, __VA_ARGS__)
680 #ifndef atomic64_add_return_release
681 #define atomic64_add_return_release(...) \
682 __atomic_op_release(atomic64_add_return, __VA_ARGS__)
685 #ifndef atomic64_add_return
686 #define atomic64_add_return(...) \
687 __atomic_op_fence(atomic64_add_return, __VA_ARGS__)
689 #endif /* atomic64_add_return_relaxed */
691 /* atomic64_inc_return_relaxed */
692 #ifndef atomic64_inc_return_relaxed
693 #define atomic64_inc_return_relaxed atomic64_inc_return
694 #define atomic64_inc_return_acquire atomic64_inc_return
695 #define atomic64_inc_return_release atomic64_inc_return
697 #else /* atomic64_inc_return_relaxed */
699 #ifndef atomic64_inc_return_acquire
700 #define atomic64_inc_return_acquire(...) \
701 __atomic_op_acquire(atomic64_inc_return, __VA_ARGS__)
704 #ifndef atomic64_inc_return_release
705 #define atomic64_inc_return_release(...) \
706 __atomic_op_release(atomic64_inc_return, __VA_ARGS__)
709 #ifndef atomic64_inc_return
710 #define atomic64_inc_return(...) \
711 __atomic_op_fence(atomic64_inc_return, __VA_ARGS__)
713 #endif /* atomic64_inc_return_relaxed */
716 /* atomic64_sub_return_relaxed */
717 #ifndef atomic64_sub_return_relaxed
718 #define atomic64_sub_return_relaxed atomic64_sub_return
719 #define atomic64_sub_return_acquire atomic64_sub_return
720 #define atomic64_sub_return_release atomic64_sub_return
722 #else /* atomic64_sub_return_relaxed */
724 #ifndef atomic64_sub_return_acquire
725 #define atomic64_sub_return_acquire(...) \
726 __atomic_op_acquire(atomic64_sub_return, __VA_ARGS__)
729 #ifndef atomic64_sub_return_release
730 #define atomic64_sub_return_release(...) \
731 __atomic_op_release(atomic64_sub_return, __VA_ARGS__)
734 #ifndef atomic64_sub_return
735 #define atomic64_sub_return(...) \
736 __atomic_op_fence(atomic64_sub_return, __VA_ARGS__)
738 #endif /* atomic64_sub_return_relaxed */
740 /* atomic64_dec_return_relaxed */
741 #ifndef atomic64_dec_return_relaxed
742 #define atomic64_dec_return_relaxed atomic64_dec_return
743 #define atomic64_dec_return_acquire atomic64_dec_return
744 #define atomic64_dec_return_release atomic64_dec_return
746 #else /* atomic64_dec_return_relaxed */
748 #ifndef atomic64_dec_return_acquire
749 #define atomic64_dec_return_acquire(...) \
750 __atomic_op_acquire(atomic64_dec_return, __VA_ARGS__)
753 #ifndef atomic64_dec_return_release
754 #define atomic64_dec_return_release(...) \
755 __atomic_op_release(atomic64_dec_return, __VA_ARGS__)
758 #ifndef atomic64_dec_return
759 #define atomic64_dec_return(...) \
760 __atomic_op_fence(atomic64_dec_return, __VA_ARGS__)
762 #endif /* atomic64_dec_return_relaxed */
765 /* atomic64_fetch_add_relaxed */
766 #ifndef atomic64_fetch_add_relaxed
767 #define atomic64_fetch_add_relaxed atomic64_fetch_add
768 #define atomic64_fetch_add_acquire atomic64_fetch_add
769 #define atomic64_fetch_add_release atomic64_fetch_add
771 #else /* atomic64_fetch_add_relaxed */
773 #ifndef atomic64_fetch_add_acquire
774 #define atomic64_fetch_add_acquire(...) \
775 __atomic_op_acquire(atomic64_fetch_add, __VA_ARGS__)
778 #ifndef atomic64_fetch_add_release
779 #define atomic64_fetch_add_release(...) \
780 __atomic_op_release(atomic64_fetch_add, __VA_ARGS__)
783 #ifndef atomic64_fetch_add
784 #define atomic64_fetch_add(...) \
785 __atomic_op_fence(atomic64_fetch_add, __VA_ARGS__)
787 #endif /* atomic64_fetch_add_relaxed */
789 /* atomic64_fetch_inc_relaxed */
790 #ifndef atomic64_fetch_inc_relaxed
792 #ifndef atomic64_fetch_inc
793 #define atomic64_fetch_inc(v) atomic64_fetch_add(1, (v))
794 #define atomic64_fetch_inc_relaxed(v) atomic64_fetch_add_relaxed(1, (v))
795 #define atomic64_fetch_inc_acquire(v) atomic64_fetch_add_acquire(1, (v))
796 #define atomic64_fetch_inc_release(v) atomic64_fetch_add_release(1, (v))
797 #else /* atomic64_fetch_inc */
798 #define atomic64_fetch_inc_relaxed atomic64_fetch_inc
799 #define atomic64_fetch_inc_acquire atomic64_fetch_inc
800 #define atomic64_fetch_inc_release atomic64_fetch_inc
801 #endif /* atomic64_fetch_inc */
803 #else /* atomic64_fetch_inc_relaxed */
805 #ifndef atomic64_fetch_inc_acquire
806 #define atomic64_fetch_inc_acquire(...) \
807 __atomic_op_acquire(atomic64_fetch_inc, __VA_ARGS__)
810 #ifndef atomic64_fetch_inc_release
811 #define atomic64_fetch_inc_release(...) \
812 __atomic_op_release(atomic64_fetch_inc, __VA_ARGS__)
815 #ifndef atomic64_fetch_inc
816 #define atomic64_fetch_inc(...) \
817 __atomic_op_fence(atomic64_fetch_inc, __VA_ARGS__)
819 #endif /* atomic64_fetch_inc_relaxed */
821 /* atomic64_fetch_sub_relaxed */
822 #ifndef atomic64_fetch_sub_relaxed
823 #define atomic64_fetch_sub_relaxed atomic64_fetch_sub
824 #define atomic64_fetch_sub_acquire atomic64_fetch_sub
825 #define atomic64_fetch_sub_release atomic64_fetch_sub
827 #else /* atomic64_fetch_sub_relaxed */
829 #ifndef atomic64_fetch_sub_acquire
830 #define atomic64_fetch_sub_acquire(...) \
831 __atomic_op_acquire(atomic64_fetch_sub, __VA_ARGS__)
834 #ifndef atomic64_fetch_sub_release
835 #define atomic64_fetch_sub_release(...) \
836 __atomic_op_release(atomic64_fetch_sub, __VA_ARGS__)
839 #ifndef atomic64_fetch_sub
840 #define atomic64_fetch_sub(...) \
841 __atomic_op_fence(atomic64_fetch_sub, __VA_ARGS__)
843 #endif /* atomic64_fetch_sub_relaxed */
845 /* atomic64_fetch_dec_relaxed */
846 #ifndef atomic64_fetch_dec_relaxed
848 #ifndef atomic64_fetch_dec
849 #define atomic64_fetch_dec(v) atomic64_fetch_sub(1, (v))
850 #define atomic64_fetch_dec_relaxed(v) atomic64_fetch_sub_relaxed(1, (v))
851 #define atomic64_fetch_dec_acquire(v) atomic64_fetch_sub_acquire(1, (v))
852 #define atomic64_fetch_dec_release(v) atomic64_fetch_sub_release(1, (v))
853 #else /* atomic64_fetch_dec */
854 #define atomic64_fetch_dec_relaxed atomic64_fetch_dec
855 #define atomic64_fetch_dec_acquire atomic64_fetch_dec
856 #define atomic64_fetch_dec_release atomic64_fetch_dec
857 #endif /* atomic64_fetch_dec */
859 #else /* atomic64_fetch_dec_relaxed */
861 #ifndef atomic64_fetch_dec_acquire
862 #define atomic64_fetch_dec_acquire(...) \
863 __atomic_op_acquire(atomic64_fetch_dec, __VA_ARGS__)
866 #ifndef atomic64_fetch_dec_release
867 #define atomic64_fetch_dec_release(...) \
868 __atomic_op_release(atomic64_fetch_dec, __VA_ARGS__)
871 #ifndef atomic64_fetch_dec
872 #define atomic64_fetch_dec(...) \
873 __atomic_op_fence(atomic64_fetch_dec, __VA_ARGS__)
875 #endif /* atomic64_fetch_dec_relaxed */
877 /* atomic64_fetch_or_relaxed */
878 #ifndef atomic64_fetch_or_relaxed
879 #define atomic64_fetch_or_relaxed atomic64_fetch_or
880 #define atomic64_fetch_or_acquire atomic64_fetch_or
881 #define atomic64_fetch_or_release atomic64_fetch_or
883 #else /* atomic64_fetch_or_relaxed */
885 #ifndef atomic64_fetch_or_acquire
886 #define atomic64_fetch_or_acquire(...) \
887 __atomic_op_acquire(atomic64_fetch_or, __VA_ARGS__)
890 #ifndef atomic64_fetch_or_release
891 #define atomic64_fetch_or_release(...) \
892 __atomic_op_release(atomic64_fetch_or, __VA_ARGS__)
895 #ifndef atomic64_fetch_or
896 #define atomic64_fetch_or(...) \
897 __atomic_op_fence(atomic64_fetch_or, __VA_ARGS__)
899 #endif /* atomic64_fetch_or_relaxed */
901 /* atomic64_fetch_and_relaxed */
902 #ifndef atomic64_fetch_and_relaxed
903 #define atomic64_fetch_and_relaxed atomic64_fetch_and
904 #define atomic64_fetch_and_acquire atomic64_fetch_and
905 #define atomic64_fetch_and_release atomic64_fetch_and
907 #else /* atomic64_fetch_and_relaxed */
909 #ifndef atomic64_fetch_and_acquire
910 #define atomic64_fetch_and_acquire(...) \
911 __atomic_op_acquire(atomic64_fetch_and, __VA_ARGS__)
914 #ifndef atomic64_fetch_and_release
915 #define atomic64_fetch_and_release(...) \
916 __atomic_op_release(atomic64_fetch_and, __VA_ARGS__)
919 #ifndef atomic64_fetch_and
920 #define atomic64_fetch_and(...) \
921 __atomic_op_fence(atomic64_fetch_and, __VA_ARGS__)
923 #endif /* atomic64_fetch_and_relaxed */
925 #ifdef atomic64_andnot
926 /* atomic64_fetch_andnot_relaxed */
927 #ifndef atomic64_fetch_andnot_relaxed
928 #define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot
929 #define atomic64_fetch_andnot_acquire atomic64_fetch_andnot
930 #define atomic64_fetch_andnot_release atomic64_fetch_andnot
932 #else /* atomic64_fetch_andnot_relaxed */
934 #ifndef atomic64_fetch_andnot_acquire
935 #define atomic64_fetch_andnot_acquire(...) \
936 __atomic_op_acquire(atomic64_fetch_andnot, __VA_ARGS__)
939 #ifndef atomic64_fetch_andnot_release
940 #define atomic64_fetch_andnot_release(...) \
941 __atomic_op_release(atomic64_fetch_andnot, __VA_ARGS__)
944 #ifndef atomic64_fetch_andnot
945 #define atomic64_fetch_andnot(...) \
946 __atomic_op_fence(atomic64_fetch_andnot, __VA_ARGS__)
948 #endif /* atomic64_fetch_andnot_relaxed */
949 #endif /* atomic64_andnot */
951 /* atomic64_fetch_xor_relaxed */
952 #ifndef atomic64_fetch_xor_relaxed
953 #define atomic64_fetch_xor_relaxed atomic64_fetch_xor
954 #define atomic64_fetch_xor_acquire atomic64_fetch_xor
955 #define atomic64_fetch_xor_release atomic64_fetch_xor
957 #else /* atomic64_fetch_xor_relaxed */
959 #ifndef atomic64_fetch_xor_acquire
960 #define atomic64_fetch_xor_acquire(...) \
961 __atomic_op_acquire(atomic64_fetch_xor, __VA_ARGS__)
964 #ifndef atomic64_fetch_xor_release
965 #define atomic64_fetch_xor_release(...) \
966 __atomic_op_release(atomic64_fetch_xor, __VA_ARGS__)
969 #ifndef atomic64_fetch_xor
970 #define atomic64_fetch_xor(...) \
971 __atomic_op_fence(atomic64_fetch_xor, __VA_ARGS__)
973 #endif /* atomic64_fetch_xor_relaxed */
976 /* atomic64_xchg_relaxed */
977 #ifndef atomic64_xchg_relaxed
978 #define atomic64_xchg_relaxed atomic64_xchg
979 #define atomic64_xchg_acquire atomic64_xchg
980 #define atomic64_xchg_release atomic64_xchg
982 #else /* atomic64_xchg_relaxed */
984 #ifndef atomic64_xchg_acquire
985 #define atomic64_xchg_acquire(...) \
986 __atomic_op_acquire(atomic64_xchg, __VA_ARGS__)
989 #ifndef atomic64_xchg_release
990 #define atomic64_xchg_release(...) \
991 __atomic_op_release(atomic64_xchg, __VA_ARGS__)
994 #ifndef atomic64_xchg
995 #define atomic64_xchg(...) \
996 __atomic_op_fence(atomic64_xchg, __VA_ARGS__)
998 #endif /* atomic64_xchg_relaxed */
1000 /* atomic64_cmpxchg_relaxed */
1001 #ifndef atomic64_cmpxchg_relaxed
1002 #define atomic64_cmpxchg_relaxed atomic64_cmpxchg
1003 #define atomic64_cmpxchg_acquire atomic64_cmpxchg
1004 #define atomic64_cmpxchg_release atomic64_cmpxchg
1006 #else /* atomic64_cmpxchg_relaxed */
1008 #ifndef atomic64_cmpxchg_acquire
1009 #define atomic64_cmpxchg_acquire(...) \
1010 __atomic_op_acquire(atomic64_cmpxchg, __VA_ARGS__)
1013 #ifndef atomic64_cmpxchg_release
1014 #define atomic64_cmpxchg_release(...) \
1015 __atomic_op_release(atomic64_cmpxchg, __VA_ARGS__)
1018 #ifndef atomic64_cmpxchg
1019 #define atomic64_cmpxchg(...) \
1020 __atomic_op_fence(atomic64_cmpxchg, __VA_ARGS__)
1022 #endif /* atomic64_cmpxchg_relaxed */
1024 #ifndef atomic64_try_cmpxchg
1026 #define __atomic64_try_cmpxchg(type, _p, _po, _n) \
1028 typeof(_po) __po = (_po); \
1029 typeof(*(_po)) __r, __o = *__po; \
1030 __r = atomic64_cmpxchg##type((_p), __o, (_n)); \
1031 if (unlikely(__r != __o)) \
1033 likely(__r == __o); \
1036 #define atomic64_try_cmpxchg(_p, _po, _n) __atomic64_try_cmpxchg(, _p, _po, _n)
1037 #define atomic64_try_cmpxchg_relaxed(_p, _po, _n) __atomic64_try_cmpxchg(_relaxed, _p, _po, _n)
1038 #define atomic64_try_cmpxchg_acquire(_p, _po, _n) __atomic64_try_cmpxchg(_acquire, _p, _po, _n)
1039 #define atomic64_try_cmpxchg_release(_p, _po, _n) __atomic64_try_cmpxchg(_release, _p, _po, _n)
1041 #else /* atomic64_try_cmpxchg */
1042 #define atomic64_try_cmpxchg_relaxed atomic64_try_cmpxchg
1043 #define atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg
1044 #define atomic64_try_cmpxchg_release atomic64_try_cmpxchg
1045 #endif /* atomic64_try_cmpxchg */
1047 #ifndef atomic64_andnot
1048 static inline void atomic64_andnot(long long i
, atomic64_t
*v
)
1050 atomic64_and(~i
, v
);
1053 static inline long long atomic64_fetch_andnot(long long i
, atomic64_t
*v
)
1055 return atomic64_fetch_and(~i
, v
);
1058 static inline long long atomic64_fetch_andnot_relaxed(long long i
, atomic64_t
*v
)
1060 return atomic64_fetch_and_relaxed(~i
, v
);
1063 static inline long long atomic64_fetch_andnot_acquire(long long i
, atomic64_t
*v
)
1065 return atomic64_fetch_and_acquire(~i
, v
);
1068 static inline long long atomic64_fetch_andnot_release(long long i
, atomic64_t
*v
)
1070 return atomic64_fetch_and_release(~i
, v
);
1074 #define atomic64_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c))
1076 #include <asm-generic/atomic-long.h>
1078 #endif /* _LINUX_ATOMIC_H */