23#ifndef LELY_LIBC_STDATOMIC_H_
24#define LELY_LIBC_STDATOMIC_H_
28#ifndef LELY_HAVE_STDATOMIC_H
29#if __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_ATOMICS__)
30#define LELY_HAVE_STDATOMIC_H 1
34#if LELY_HAVE_STDATOMIC_H
38#if defined(__clang__) && __has_extension(c_atomic)
39#define LELY_HAVE_CLANG_ATOMIC 1
40#elif GNUC_PREREQ(4, 7)
41#define LELY_HAVE_GNUC_ATOMIC 1
42#elif GNUC_PREREQ(4, 1)
43#define LELY_HAVE_SYNC_ATOMIC 1
46#if LELY_HAVE_CLANG_ATOMIC | LELY_HAVE_GNUC_ATOMIC | LELY_HAVE_SYNC_ATOMIC
53#ifndef LELY_LIBC_STDATOMIC_INLINE
54#define LELY_LIBC_STDATOMIC_INLINE static inline
57#ifdef __GCC_ATOMIC_BOOL_LOCK_FREE
58#define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE
60#define ATOMIC_BOOL_LOCK_FREE 2
63#ifdef __GCC_ATOMIC_CHAR_LOCK_FREE
64#define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE
66#define ATOMIC_CHAR_LOCK_FREE 1
69#ifdef __GCC_ATOMIC_CHAR16_T_LOCK_FREE
70#define ATOMIC_CHAR16_T_LOCK_FREE __GCC_ATOMIC_CHAR16_T_LOCK_FREE
72#define ATOMIC_CHAR16_T_LOCK_FREE 1
75#ifdef __GCC_ATOMIC_CHAR32_T_LOCK_FREE
76#define ATOMIC_CHAR32_T_LOCK_FREE __GCC_ATOMIC_CHAR32_T_LOCK_FREE
78#define ATOMIC_CHAR32_T_LOCK_FREE 1
81#ifdef __GCC_ATOMIC_WCHAR_T_LOCK_FREE
82#define ATOMIC_WCHAR_T_LOCK_FREE __GCC_ATOMIC_WCHAR_T_LOCK_FREE
84#define ATOMIC_WCHAR_T_LOCK_FREE 1
87#ifdef __GCC_ATOMIC_SHORT_LOCK_FREE
88#define ATOMIC_SHORT_LOCK_FREE __GCC_ATOMIC_SHORT_LOCK_FREE
90#define ATOMIC_SHORT_LOCK_FREE 1
93#ifdef __GCC_ATOMIC_INT_LOCK_FREE
94#define ATOMIC_INT_LOCK_FREE __GCC_ATOMIC_INT_LOCK_FREE
96#define ATOMIC_INT_LOCK_FREE 1
99#ifdef __GCC_ATOMIC_LONG_LOCK_FREE
100#define ATOMIC_LONG_LOCK_FREE __GCC_ATOMIC_LONG_LOCK_FREE
102#define ATOMIC_LONG_LOCK_FREE 1
105#ifdef __GCC_ATOMIC_LLONG_LOCK_FREE
106#define ATOMIC_LLONG_LOCK_FREE __GCC_ATOMIC_LLONG_LOCK_FREE
108#define ATOMIC_LLONG_LOCK_FREE 1
111#ifdef __GCC_ATOMIC_POINTER_LOCK_FREE
112#define ATOMIC_POINTER_LOCK_FREE __GCC_ATOMIC_POINTER_LOCK_FREE
114#define ATOMIC_POINTER_LOCK_FREE 1
120#define ATOMIC_FLAG_INIT \
128#ifdef __ATOMIC_RELAXED
137#ifdef __ATOMIC_CONSUME
146#ifdef __ATOMIC_ACQUIRE
155#ifdef __ATOMIC_RELEASE
165#ifdef __ATOMIC_ACQ_REL
171#ifdef __ATOMIC_SEQ_CST
178#ifndef LELY_HAVE_CLANG_ATOMIC
182 T volatile _value_; \
186#ifndef ATOMIC_BOOL_TYPE
188#define ATOMIC_BOOL_TYPE bool
190#define ATOMIC_BOOL_TYPE _Bool
199 _Atomic(ATOMIC_BOOL_TYPE) _value_;
206#if LELY_HAVE_CLANG_ATOMIC
207#define ATOMIC_VAR_INIT(value) (value)
209#define ATOMIC_VAR_INIT(value) \
219#if LELY_HAVE_CLANG_ATOMIC
220#define atomic_init(obj, value) __c11_atomic_init(obj, value)
222#define atomic_init(obj, value) \
223 atomic_store_explicit(obj, value, memory_order_relaxed)
230#if defined(__GNUC__) || (__clang__)
231#define kill_dependency(y) \
233 __typeof__(y) _tmp_ = (y); \
237#define kill_dependency(y)
264#if LELY_HAVE_CLANG_ATOMIC
265#define atomic_is_lock_free(obj) (__c11_atomic_is_lock_free(sizeof(*(obj))))
266#elif LELY_HAVE_GNUC_ATOMIC
267#define atomic_is_lock_free(obj) \
268 (__atomic_is_lock_free(sizeof((obj)->_value_), &(obj)->_value_))
270#define atomic_is_lock_free(obj) (sizeof((obj)->_value_) <= sizeof(void *))
273typedef _Atomic(ATOMIC_BOOL_TYPE) atomic_bool;
274typedef _Atomic(
char) atomic_char;
275typedef _Atomic(
signed char) atomic_schar;
276typedef _Atomic(
unsigned char) atomic_uchar;
277typedef _Atomic(
short) atomic_short;
278typedef _Atomic(
unsigned short) atomic_ushort;
279typedef _Atomic(
int) atomic_int;
280typedef _Atomic(
unsigned int) atomic_uint;
281typedef _Atomic(
long) atomic_long;
282typedef _Atomic(
unsigned long) atomic_ulong;
283typedef _Atomic(
long long) atomic_llong;
284typedef _Atomic(
unsigned long long) atomic_ullong;
285typedef _Atomic(
char16_t) atomic_char16_t;
286typedef _Atomic(
char32_t) atomic_char32_t;
287typedef _Atomic(
wchar_t) atomic_wchar_t;
288typedef _Atomic(int_least8_t) atomic_int_least8_t;
289typedef _Atomic(uint_least8_t) atomic_uint_least8_t;
290typedef _Atomic(int_least16_t) atomic_int_least16_t;
291typedef _Atomic(uint_least16_t) atomic_uint_least16_t;
292typedef _Atomic(int_least32_t) atomic_int_least32_t;
293typedef _Atomic(uint_least32_t) atomic_uint_least32_t;
294typedef _Atomic(int_least64_t) atomic_int_least64_t;
295typedef _Atomic(uint_least64_t) atomic_uint_least64_t;
296typedef _Atomic(int_fast8_t) atomic_int_fast8_t;
297typedef _Atomic(uint_fast8_t) atomic_uint_fast8_t;
298typedef _Atomic(int_fast16_t) atomic_int_fast16_t;
299typedef _Atomic(uint_fast16_t) atomic_uint_fast16_t;
300typedef _Atomic(int_fast32_t) atomic_int_fast32_t;
301typedef _Atomic(uint_fast32_t) atomic_uint_fast32_t;
302typedef _Atomic(int_fast64_t) atomic_int_fast64_t;
303typedef _Atomic(uint_fast64_t) atomic_uint_fast64_t;
304typedef _Atomic(intptr_t) atomic_intptr_t;
305typedef _Atomic(uintptr_t) atomic_uintptr_t;
306typedef _Atomic(
size_t) atomic_size_t;
307typedef _Atomic(ptrdiff_t) atomic_ptrdiff_t;
308typedef _Atomic(intmax_t) atomic_intmax_t;
309typedef _Atomic(uintmax_t) atomic_uintmax_t;
314#define atomic_store(object, desired) \
315 (atomic_store_explicit((object), (desired), memory_order_seq_cst))
321#if LELY_HAVE_CLANG_ATOMIC
322#define atomic_store_explicit(object, desired, order) \
323 (__c11_atomic_store((object), (desired), (order)))
324#elif LELY_HAVE_GNUC_ATOMIC
325#define atomic_store_explicit(object, desired, order) \
326 (__atomic_store_n(&(object)->_value_, (desired), (order)))
328#define atomic_store_explicit(object, desired, order) \
329 ((void)atomic_exchange_explicit((object), (desired), (order)))
333#define atomic_load(object) \
334 (atomic_load_explicit((object), memory_order_seq_cst))
340#if LELY_HAVE_CLANG_ATOMIC
341#define atomic_load_explicit(object, order) \
342 (__c11_atomic_load((object), (order)))
343#elif LELY_HAVE_GNUC_ATOMIC
344#define atomic_load_explicit(object, order) \
345 (__atomic_load_n(&(object)->_value_, (order)))
346#elif LELY_HAVE_SYNC_ATOMIC
347#define atomic_load_explicit(object, order) \
348 ((void)(order), __sync_fetch_and_add(&(object)->_value_, 0))
355#define atomic_exchange(object, desired) \
356 (atomic_exchange_explicit((object), (desired), memory_order_seq_cst))
364#if LELY_HAVE_CLANG_ATOMIC
365#define atomic_exchange_explicit(object, desired, order) \
366 (__c11_atomic_exchange((object), (desired), (order)))
367#elif LELY_HAVE_GNUC_ATOMIC
368#define atomic_exchange_explicit(object, desired, order) \
369 (__atomic_exchange_n(&(object)->_value_, (desired), (order)))
370#elif LELY_HAVE_SYNC_ATOMIC
371#define atomic_exchange_explicit(object, desired, order) \
373 __typeof__(object) __object = (object); \
374 __typeof__(desired) __desired = (desired); \
375 atomic_thread_fence(order); \
376 __sync_lock_test_and_set(&(__object)->_value_, __desired); \
384#define atomic_compare_exchange_strong(object, expected, desired) \
385 (atomic_compare_exchange_strong_explicit((object), (expected), \
386 (desired), memory_order_seq_cst, \
387 memory_order_seq_cst))
399#if LELY_HAVE_CLANG_ATOMIC
400#define atomic_compare_exchange_strong_explicit( \
401 object, expected, desired, success, failure) \
402 (__c11_atomic_compare_exchange_strong((object), (expected), (desired), \
403 (success), (failure)))
404#elif LELY_HAVE_GNUC_ATOMIC
405#define atomic_compare_exchange_strong_explicit( \
406 object, expected, desired, success, failure) \
407 (__atomic_compare_exchange_n(&(object)->_value_, (expected), \
408 (desired), 0, (success), (failure)))
409#elif LELY_HAVE_SYNC_ATOMIC
411#define atomic_compare_exchange_strong_explicit(object, expected, desired, \
416 __typeof__(*(expected)) _expected_ = *(expected); \
417 (ATOMIC_BOOL_TYPE)((*(expected) = __sync_val_compare_and_swap( \
418 &(object)->_value_, _expected_, (desired))) \
428#define atomic_compare_exchange_weak(object, expected, desired) \
429 (atomic_compare_exchange_weak_explicit((object), (expected), \
430 (desired), memory_order_seq_cst, \
431 memory_order_seq_cst))
446#if LELY_HAVE_CLANG_ATOMIC
447#define atomic_compare_exchange_weak_explicit( \
448 object, expected, desired, success, failure) \
449 (__c11_atomic_compare_exchange_weak((object), (expected), (desired), \
450 (success), (failure)))
451#elif LELY_HAVE_GNUC_ATOMIC
452#define atomic_compare_exchange_weak_explicit( \
453 object, expected, desired, success, failure) \
454 (__atomic_compare_exchange_n(&(object)->_value_, (expected), \
455 (desired), 1, (success), (failure)))
457#define atomic_compare_exchange_weak_explicit( \
458 object, expected, desired, success, failure) \
459 (atomic_compare_exchange_strong_explicit((object), (expected), \
460 (desired), (success), (failure)))
467#define atomic_fetch_add(object, operand) \
468 (atomic_fetch_add_explicit((object), (operand), memory_order_seq_cst))
476#if LELY_HAVE_CLANG_ATOMIC
477#define atomic_fetch_add_explicit(object, operand, order) \
478 (__c11_atomic_fetch_add((object), (operand), (order)))
479#elif LELY_HAVE_GNUC_ATOMIC
480#define atomic_fetch_add_explicit(object, operand, order) \
481 (__atomic_fetch_add(&(object)->_value_, (operand), (order)))
482#elif LELY_HAVE_SYNC_ATOMIC
483#define atomic_fetch_add_explicit(object, operand, order) \
484 ((void)(order), __sync_fetch_and_add(&(object)->_value_, (operand)))
491#define atomic_fetch_sub(object, operand) \
492 (atomic_fetch_sub_explicit((object), (operand), memory_order_seq_cst))
500#if LELY_HAVE_CLANG_ATOMIC
501#define atomic_fetch_sub_explicit(object, operand, order) \
502 (__c11_atomic_fetch_sub((object), (operand), (order)))
503#elif LELY_HAVE_GNUC_ATOMIC
504#define atomic_fetch_sub_explicit(object, operand, order) \
505 (__atomic_fetch_sub(&(object)->_value_, (operand), (order)))
506#elif LELY_HAVE_SYNC_ATOMIC
507#define atomic_fetch_sub_explicit(object, operand, order) \
508 ((void)(order), __sync_fetch_and_sub(&(object)->_value_, (operand)))
515#define atomic_fetch_or(object, operand) \
516 (atomic_fetch_or_explicit((object), (operand), memory_order_seq_cst))
524#if LELY_HAVE_CLANG_ATOMIC
525#define atomic_fetch_or_explicit(object, operand, order) \
526 (__c11_atomic_fetch_or((object), (operand), (order)))
527#elif LELY_HAVE_GNUC_ATOMIC
528#define atomic_fetch_or_explicit(object, operand, order) \
529 (__atomic_fetch_or(&(object)->_value_, (operand), (order)))
530#elif LELY_HAVE_SYNC_ATOMIC
531#define atomic_fetch_or_explicit(object, operand, order) \
532 ((void)(order), __sync_fetch_and_or(&(object)->_value_, (operand)))
539#define atomic_fetch_xor(object, operand) \
540 (atomic_fetch_xor_explicit((object), (operand), memory_order_seq_cst))
548#if LELY_HAVE_CLANG_ATOMIC
549#define atomic_fetch_xor_explicit(object, operand, order) \
550 (__c11_atomic_fetch_xor((object), (operand), (order)))
551#elif LELY_HAVE_GNUC_ATOMIC
552#define atomic_fetch_xor_explicit(object, operand, order) \
553 (__atomic_fetch_xor(&(object)->_value_, (operand), (order)))
554#elif LELY_HAVE_SYNC_ATOMIC
555#define atomic_fetch_xor_explicit(object, operand, order) \
556 ((void)(order), __sync_fetch_and_xor(&(object)->_value_, (operand)))
563#define atomic_fetch_and(object, operand) \
564 (atomic_fetch_and_explicit((object), (operand), memory_order_seq_cst))
572#if LELY_HAVE_CLANG_ATOMIC
573#define atomic_fetch_and_explicit(object, operand, order) \
574 (__c11_atomic_fetch_and((object), (operand), (order)))
575#elif LELY_HAVE_GNUC_ATOMIC
576#define atomic_fetch_and_explicit(object, operand, order) \
577 (__atomic_fetch_and(&(object)->_value_, (operand), (order)))
578#elif LELY_HAVE_SYNC_ATOMIC
579#define atomic_fetch_and_explicit(object, operand, order) \
580 ((void)(order), __sync_fetch_and_and(&(object)->_value_, (operand)))
619#if LELY_HAVE_CLANG_ATOMIC
620 __c11_atomic_thread_fence(order);
621#elif LELY_HAVE_GNUC_ATOMIC
622 __atomic_thread_fence(order);
623#elif LELY_HAVE_SYNC_ATOMIC
625 __sync_synchronize();
632#if LELY_HAVE_CLANG_ATOMIC
633 __c11_atomic_signal_fence(order);
634#elif LELY_HAVE_GNUC_ATOMIC
635 __atomic_signal_fence(order);
636#elif defined(__GNUC__)
638 __asm
volatile(
"" :::
"memory");
642inline ATOMIC_BOOL_TYPE
649inline ATOMIC_BOOL_TYPE
This header file is part of the Lely libraries; it contains the compiler feature definitions.
This header file is part of the C11 and POSIX compatibility library; it includes <stdatomic....
memory_order
An enumerated type identifying memory constraints.
@ memory_order_consume
A load operation performs a consume operation on the affected memory location.
@ memory_order_seq_cst
Enforces a single total order on all affected locations.
@ memory_order_release
A store operation performs a release operation on the affected memory location.
@ memory_order_relaxed
No operation orders memory.
@ memory_order_acq_rel
A load operation performs an acquire operation on the affected memory location, and a store operation...
@ memory_order_acquire
A load operation performs an acquire operation on the affected memory location.
ATOMIC_BOOL_TYPE atomic_flag_test_and_set_explicit(volatile atomic_flag *object, memory_order order)
Atomically sets the value at object to true.
void atomic_flag_clear(volatile atomic_flag *object)
Equivalent to #atomic_flag_test_and_set_explicit(object, memory_order_seq_cst).
void atomic_signal_fence(memory_order order)
Equivalent to atomic_thread_fence(order), except that the resulting ordering constraints are establis...
void atomic_flag_clear_explicit(volatile atomic_flag *object, memory_order order)
Atomically sets the value at object to false.
ATOMIC_BOOL_TYPE atomic_flag_test_and_set(volatile atomic_flag *object)
Equivalent to #atomic_flag_test_and_set_explicit(object, memory_order_seq_cst).
#define atomic_exchange_explicit(object, desired, order)
Atomically replaces the value at object with desired.
void atomic_thread_fence(memory_order order)
Inserts a fence with semantics according to order.
#define atomic_store_explicit(object, desired, order)
Atomically replaces the value at object with the value of desired.
This header file is part of the C11 and POSIX compatibility library; it includes <stddef....
This header file is part of the C11 and POSIX compatibility library; it includes <stdint....
An atomic type providing the classic test-and-set functionality.
This header file is part of the C11 and POSIX compatibility library; it includes <uchar....