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Make the stdatomic shim and mutexatomic type complete

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The stdatomic shims for non-C11 compilers (Windows, old gcc, ...) and
mutexatomic implemented only and minimal subset of the atomic types.
This commit adds 16-bit operations for Windows and all atomic types as
defined in standard.
This commit is contained in:
Mark Andrews
2020-07-01 17:06:28 +10:00
parent f34b179d12
commit bccea5862d
3 changed files with 272 additions and 102 deletions
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83
lib/isc/include/isc/mutexatomic.h
View File

@@ -13,6 +13,9 @@
#include <inttypes.h> #include <inttypes.h>
#include <stdbool.h> #include <stdbool.h>
#if HAVE_UCHAR_H
#include <uchar.h>
#endif /* HAVE_UCHAR_H */
#include <isc/mutex.h> #include <isc/mutex.h>
@@ -73,35 +76,65 @@ enum memory_order {
typedef enum memory_order memory_order; typedef enum memory_order memory_order;
typedef struct atomic_int_fast32 { #define ___TYPEDEF(type, name, orig) \
isc_mutex_t m; typedef struct name { \
int_fast32_t v; isc_mutex_t m; \
} atomic_int_fast32_t; orig v; \
} type;
typedef struct atomic_int_fast64 { #define _TYPEDEF_S(type) ___TYPEDEF(atomic_##type, atomic_##type##_s, type)
isc_mutex_t m; #define _TYPEDEF_O(type, orig) \
int_fast64_t v; ___TYPEDEF(atomic_##type, atomic_##type##_s, orig)
} atomic_int_fast64_t; #define _TYPEDEF_T(type) \
___TYPEDEF(atomic_##type##_t, atomic_##type##_s, type##_t)
typedef struct atomic_uint_fast32 { #ifndef HAVE_UCHAR_H
isc_mutex_t m; typedef uint_least16_t char16_t;
uint_fast32_t v; typedef uint_least32_t char32_t;
} atomic_uint_fast32_t; #endif /* HAVE_UCHAR_H */
typedef struct atomic_uint_fast64 { _TYPEDEF_S(bool);
isc_mutex_t m; _TYPEDEF_S(char);
uint_fast64_t v; _TYPEDEF_O(schar, signed char);
} atomic_uint_fast64_t; _TYPEDEF_O(uchar, unsigned char);
_TYPEDEF_S(short);
_TYPEDEF_O(ushort, unsigned short);
_TYPEDEF_S(int);
_TYPEDEF_O(uint, unsigned int);
_TYPEDEF_S(long);
_TYPEDEF_O(ulong, unsigned long);
_TYPEDEF_O(llong, long long);
_TYPEDEF_O(ullong, unsigned long long);
_TYPEDEF_T(char16);
_TYPEDEF_T(char32);
_TYPEDEF_T(wchar);
_TYPEDEF_T(int_least8);
_TYPEDEF_T(uint_least8);
_TYPEDEF_T(int_least16);
_TYPEDEF_T(uint_least16);
_TYPEDEF_T(int_least32);
_TYPEDEF_T(uint_least32);
_TYPEDEF_T(int_least64);
_TYPEDEF_T(uint_least64);
_TYPEDEF_T(int_fast8);
_TYPEDEF_T(uint_fast8);
_TYPEDEF_T(int_fast16);
_TYPEDEF_T(uint_fast16);
_TYPEDEF_T(int_fast32);
_TYPEDEF_T(uint_fast32);
_TYPEDEF_T(int_fast64);
_TYPEDEF_T(uint_fast64);
_TYPEDEF_T(intptr);
_TYPEDEF_T(uintptr);
_TYPEDEF_T(size);
_TYPEDEF_T(ptrdiff);
_TYPEDEF_T(intmax);
_TYPEDEF_T(uintmax);
typedef struct atomic_uintptr { #undef ___TYPEDEF
isc_mutex_t m; #undef _TYPEDEF_S
uintptr_t v; #undef _TYPEDEF_T
} atomic_uintptr_t; #undef _TYPEDEF_O
typedef struct atomic_bool_s {
isc_mutex_t m;
bool v;
} atomic_bool;
#define ATOMIC_VAR_INIT(arg) \ #define ATOMIC_VAR_INIT(arg) \
{ \ { \

51
lib/isc/unix/include/isc/stdatomic.h
View File

@@ -13,6 +13,10 @@
#include <inttypes.h> #include <inttypes.h>
#include <stdbool.h> #include <stdbool.h>
#include <stddef.h>
#if HAVE_UCHAR_H
#include <uchar.h>
#endif /* HAVE_UCHAR_H */
#if !defined(__has_feature) #if !defined(__has_feature)
#define __has_feature(x) 0 #define __has_feature(x) 0
@@ -73,13 +77,48 @@ enum memory_order {
typedef enum memory_order memory_order; typedef enum memory_order memory_order;
typedef int_fast32_t atomic_int_fast32_t; #ifndef HAVE_UCHAR_H
typedef uint_fast32_t atomic_uint_fast32_t; typedef uint_least16_t char16_t;
typedef int_fast64_t atomic_int_fast64_t; typedef uint_least32_t char32_t;
typedef uint_fast64_t atomic_uint_fast64_t; #endif /* HAVE_UCHAR_H */
typedef bool atomic_bool;
typedef uint_fast64_t atomic_uintptr_t; typedef bool atomic_bool;
typedef char atomic_char;
typedef signed char atomic_schar;
typedef unsigned char atomic_uchar;
typedef short atomic_short;
typedef unsigned short atomic_ushort;
typedef int atomic_int;
typedef unsigned int atomic_uint;
typedef long atomic_long;
typedef unsigned long atomic_ulong;
typedef long long atomic_llong;
typedef unsigned long long atomic_ullong;
typedef char16_t atomic_char16_t;
typedef char32_t atomic_char32_t;
typedef wchar_t atomic_wchar_t;
typedef int_least8_t atomic_int_least8_t;
typedef uint_least8_t atomic_uint_least8_t;
typedef int_least16_t atomic_int_least16_t;
typedef uint_least16_t atomic_uint_least16_t;
typedef int_least32_t atomic_int_least32_t;
typedef uint_least32_t atomic_uint_least32_t;
typedef int_least64_t atomic_int_least64_t;
typedef uint_least64_t atomic_uint_least64_t;
typedef int_fast8_t atomic_int_fast8_t;
typedef uint_fast8_t atomic_uint_fast8_t;
typedef int_fast16_t atomic_int_fast16_t;
typedef uint_fast16_t atomic_uint_fast16_t;
typedef int_fast32_t atomic_int_fast32_t;
typedef uint_fast32_t atomic_uint_fast32_t;
typedef int_fast64_t atomic_int_fast64_t;
typedef uint_fast64_t atomic_uint_fast64_t;
typedef intptr_t atomic_intptr_t;
typedef uintptr_t atomic_uintptr_t;
typedef size_t atomic_size_t;
typedef ptrdiff_t atomic_ptrdiff_t;
typedef intmax_t atomic_intmax_t;
typedef uintmax_t atomic_uintmax_t;
#if defined(__CLANG_ATOMICS) /* __c11_atomic builtins */ #if defined(__CLANG_ATOMICS) /* __c11_atomic builtins */
#define atomic_init(obj, desired) __c11_atomic_init(obj, desired) #define atomic_init(obj, desired) __c11_atomic_init(obj, desired)

240
lib/isc/win32/include/isc/stdatomic.h
View File

@@ -15,6 +15,7 @@
#include <stdbool.h> #include <stdbool.h>
#include <stddef.h> #include <stddef.h>
#include <stdint.h> #include <stdint.h>
#include <uchar.h>
#include <windows.h> #include <windows.h>
#pragma warning(disable : 4133) #pragma warning(disable : 4133)
@@ -65,19 +66,58 @@ typedef enum memory_order memory_order;
*/ */
typedef bool volatile atomic_bool; typedef bool volatile atomic_bool;
typedef char volatile atomic_char;
typedef signed char volatile atomic_schar;
typedef unsigned char volatile atomic_uchar;
typedef short volatile atomic_short;
typedef unsigned short volatile atomic_ushort;
typedef int volatile atomic_int;
typedef unsigned int volatile atomic_uint;
typedef long volatile atomic_long;
typedef unsigned long volatile atomic_ulong;
typedef long long volatile atomic_llong;
typedef unsigned long long volatile atomic_ullong;
typedef char16_t volatile atomic_char16_t;
typedef char32_t volatile atomic_char32_t;
typedef wchar_t volatile atomic_wchar_t;
typedef int_least8_t volatile atomic_int_least8_t;
typedef uint_least8_t volatile atomic_uint_least8_t;
typedef int_least16_t volatile atomic_int_least16_t;
typedef uint_least16_t volatile atomic_uint_least16_t;
typedef int_least32_t volatile atomic_int_least32_t;
typedef uint_least32_t volatile atomic_uint_least32_t;
typedef int_least64_t volatile atomic_int_least64_t;
typedef uint_least64_t volatile atomic_uint_least64_t;
typedef int_fast8_t volatile atomic_int_fast8_t; typedef int_fast8_t volatile atomic_int_fast8_t;
typedef uint_fast8_t volatile atomic_uint_fast8_t; typedef uint_fast8_t volatile atomic_uint_fast8_t;
typedef int_fast16_t volatile atomic_int_fast16_t;
typedef uint_fast16_t volatile atomic_uint_fast16_t;
typedef int_fast32_t volatile atomic_int_fast32_t; typedef int_fast32_t volatile atomic_int_fast32_t;
typedef uint_fast32_t volatile atomic_uint_fast32_t; typedef uint_fast32_t volatile atomic_uint_fast32_t;
typedef int_fast64_t volatile atomic_int_fast64_t; typedef int_fast64_t volatile atomic_int_fast64_t;
typedef uint_fast64_t volatile atomic_uint_fast64_t; typedef uint_fast64_t volatile atomic_uint_fast64_t;
typedef intptr_t volatile atomic_intptr_t;
typedef uintptr_t volatile atomic_uintptr_t; typedef uintptr_t volatile atomic_uintptr_t;
typedef size_t volatile atomic_size_t;
typedef ptrdiff_t volatile atomic_ptrdiff_t;
typedef intmax_t volatile atomic_intmax_t;
typedef uintmax_t volatile atomic_uintmax_t;
#define atomic_init(obj, desired) (*(obj) = (desired)) #define atomic_init(obj, desired) (*(obj) = (desired))
#define atomic_store_explicit8(obj, desired, order) \ #define atomic_store_explicit8(obj, desired, order) \
(void)InterlockedExchange8((atomic_int_fast8_t *)obj, desired) (void)InterlockedExchange8((atomic_int_fast8_t *)obj, desired)
#define atomic_store_explicit16(obj, desired, order) \
(order == memory_order_relaxed \
? (void)InterlockedExchangeNoFence16((atomic_short *)obj, \
desired) \
: (order == memory_order_acquire \
? (void)InterlockedExchangeAcquire16( \
(atomic_short *)obj, desired) \
: (void)InterlockedExchange16((atomic_short *)obj, \
desired)))
#define atomic_store_explicit32(obj, desired, order) \ #define atomic_store_explicit32(obj, desired, order) \
(order == memory_order_relaxed \ (order == memory_order_relaxed \
? (void)InterlockedExchangeNoFence( \ ? (void)InterlockedExchangeNoFence( \
@@ -109,15 +149,19 @@ atomic_store_abort(void) {
ISC_UNREACHABLE(); ISC_UNREACHABLE();
} }
#define atomic_store_explicit(obj, desired, order) \ #define atomic_store_explicit(obj, desired, order) \
(sizeof(*(obj)) == 8 \ (sizeof(*(obj)) == 8 \
? atomic_store_explicit64(obj, desired, order) \ ? atomic_store_explicit64(obj, desired, order) \
: (sizeof(*(obj)) == 4 \ : (sizeof(*(obj)) == 4 \
? atomic_store_explicit32(obj, desired, order) \ ? atomic_store_explicit32(obj, desired, order) \
: (sizeof(*(obj)) == 1 \ : (sizeof(*(obj)) == 2 \
? atomic_store_explicit8(obj, desired, \ ? atomic_store_explicit16(obj, desired, \
order) \ order) \
: atomic_store_abort()))) : (sizeof(*(obj)) == 1 \
? atomic_store_explicit8( \
obj, desired, \
order) \
: atomic_store_abort()))))
#define atomic_store(obj, desired) \ #define atomic_store(obj, desired) \
atomic_store_explicit(obj, desired, memory_order_seq_cst) atomic_store_explicit(obj, desired, memory_order_seq_cst)
@@ -125,6 +169,9 @@ atomic_store_abort(void) {
#define atomic_load_explicit8(obj, order) \ #define atomic_load_explicit8(obj, order) \
(int8_t) InterlockedOr8((atomic_int_fast8_t *)obj, 0) (int8_t) InterlockedOr8((atomic_int_fast8_t *)obj, 0)
#define atomic_load_explicit16(obj, order) \
(short)InterlockedOr16((atomic_short *)obj, 0)
#define atomic_load_explicit32(obj, order) \ #define atomic_load_explicit32(obj, order) \
(order == memory_order_relaxed \ (order == memory_order_relaxed \
? (int32_t)InterlockedOrNoFence((atomic_int_fast32_t *)obj, \ ? (int32_t)InterlockedOrNoFence((atomic_int_fast32_t *)obj, \
@@ -163,26 +210,35 @@ atomic_load_abort(void) {
ISC_UNREACHABLE(); ISC_UNREACHABLE();
} }
#define atomic_load_explicit(obj, order) \ #define atomic_load_explicit(obj, order) \
((sizeof(*(obj)) == 8 \ ((sizeof(*(obj)) == 8 \
? atomic_load_explicit64(obj, order) \ ? atomic_load_explicit64(obj, order) \
: (sizeof(*(obj) == 4) \ : (sizeof(*(obj) == 4) \
? atomic_load_explicit32(obj, order) \ ? atomic_load_explicit32(obj, order) \
: (sizeof(*(obj) == 1) \ : (sizeof(*(obj) == 2) \
? atomic_load_explicit8(obj, order) \ ? atomic_load_explicit16(obj, order) \
: atomic_load_abort()))) & \ : (sizeof(*(obj) == 1) \
(sizeof(*(obj)) == 8 \ ? atomic_load_explicit8( \
? 0xffffffffffffffffULL \ obj, order) \
: (sizeof(*(obj)) == 4 \ : atomic_load_abort())))) & \
? 0xffffffffULL \ (sizeof(*(obj)) == 8 \
: (sizeof(*(obj)) == 1 ? 0xffULL \ ? 0xffffffffffffffffULL \
: atomic_load_abort())))) : (sizeof(*(obj)) == 4 \
? 0xffffffffULL \
: (sizeof(*(obj)) == 2 \
? 0xffffULL \
: (sizeof(*(obj)) == 1 \
? 0xffULL \
: atomic_load_abort())))))
#define atomic_load(obj) atomic_load_explicit(obj, memory_order_seq_cst) #define atomic_load(obj) atomic_load_explicit(obj, memory_order_seq_cst)
#define atomic_fetch_add_explicit8(obj, arg, order) \ #define atomic_fetch_add_explicit8(obj, arg, order) \
InterlockedExchangeAdd8((atomic_int_fast8_t *)obj, arg) InterlockedExchangeAdd8((atomic_int_fast8_t *)obj, arg)
#define atomic_fetch_add_explicit16(obj, arg, order) \
InterlockedExchangeAdd16((atomic_short *)obj, arg)
#define atomic_fetch_add_explicit32(obj, arg, order) \ #define atomic_fetch_add_explicit32(obj, arg, order) \
(order == memory_order_relaxed \ (order == memory_order_relaxed \
? InterlockedExchangeAddNoFence((atomic_int_fast32_t *)obj, \ ? InterlockedExchangeAddNoFence((atomic_int_fast32_t *)obj, \
@@ -224,15 +280,18 @@ atomic_add_abort(void) {
ISC_UNREACHABLE(); ISC_UNREACHABLE();
} }
#define atomic_fetch_add_explicit(obj, arg, order) \ #define atomic_fetch_add_explicit(obj, arg, order) \
(sizeof(*(obj)) == 8 \ (sizeof(*(obj)) == 8 \
? atomic_fetch_add_explicit64(obj, arg, order) \ ? atomic_fetch_add_explicit64(obj, arg, order) \
: (sizeof(*(obj)) == 4 \ : (sizeof(*(obj)) == 4 \
? atomic_fetch_add_explicit32(obj, arg, order) \ ? atomic_fetch_add_explicit32(obj, arg, order) \
: (sizeof(*(obj)) == 1 \ : (sizeof(*(obj)) == 2 \
? atomic_fetch_add_explicit8(obj, arg, \ ? atomic_fetch_add_explicit16(obj, arg, \
order) \ order) \
: atomic_add_abort()))) : (sizeof(*(obj)) == 1 \
? atomic_fetch_add_explicit8( \
obj, arg, order) \
: atomic_add_abort()))))
#define atomic_fetch_add(obj, arg) \ #define atomic_fetch_add(obj, arg) \
atomic_fetch_add_explicit(obj, arg, memory_order_seq_cst) atomic_fetch_add_explicit(obj, arg, memory_order_seq_cst)
@@ -246,6 +305,9 @@ atomic_add_abort(void) {
#define atomic_fetch_and_explicit8(obj, arg, order) \ #define atomic_fetch_and_explicit8(obj, arg, order) \
InterlockedAnd8((atomic_int_fast8_t *)obj, arg) InterlockedAnd8((atomic_int_fast8_t *)obj, arg)
#define atomic_fetch_and_explicit16(obj, arg, order) \
InterlockedAnd16((atomic_short *)obj, arg)
#define atomic_fetch_and_explicit32(obj, arg, order) \ #define atomic_fetch_and_explicit32(obj, arg, order) \
(order == memory_order_relaxed \ (order == memory_order_relaxed \
? InterlockedAndNoFence((atomic_int_fast32_t *)obj, arg) \ ? InterlockedAndNoFence((atomic_int_fast32_t *)obj, arg) \
@@ -285,15 +347,18 @@ atomic_and_abort(void) {
ISC_UNREACHABLE(); ISC_UNREACHABLE();
} }
#define atomic_fetch_and_explicit(obj, arg, order) \ #define atomic_fetch_and_explicit(obj, arg, order) \
(sizeof(*(obj)) == 8 \ (sizeof(*(obj)) == 8 \
? atomic_fetch_and_explicit64(obj, arg, order) \ ? atomic_fetch_and_explicit64(obj, arg, order) \
: (sizeof(*(obj)) == 4 \ : (sizeof(*(obj)) == 4 \
? atomic_fetch_and_explicit32(obj, arg, order) \ ? atomic_fetch_and_explicit32(obj, arg, order) \
: (sizeof(*(obj)) == 1 \ : (sizeof(*(obj)) == 2 \
? atomic_fetch_and_explicit8(obj, arg, \ ? atomic_fetch_and_explicit16(obj, arg, \
order) \ order) \
: atomic_and_abort()))) : (sizeof(*(obj)) == 1 \
? atomic_fetch_and_explicit8( \
obj, arg, order) \
: atomic_and_abort()))))
#define atomic_fetch_and(obj, arg) \ #define atomic_fetch_and(obj, arg) \
atomic_fetch_and_explicit(obj, arg, memory_order_seq_cst) atomic_fetch_and_explicit(obj, arg, memory_order_seq_cst)
@@ -301,6 +366,9 @@ atomic_and_abort(void) {
#define atomic_fetch_or_explicit8(obj, arg, order) \ #define atomic_fetch_or_explicit8(obj, arg, order) \
InterlockedOr8((atomic_int_fast8_t *)obj, arg) InterlockedOr8((atomic_int_fast8_t *)obj, arg)
#define atomic_fetch_or_explicit16(obj, arg, order) \
InterlockedOr16((atomic_short *)obj, arg)
#define atomic_fetch_or_explicit32(obj, arg, order) \ #define atomic_fetch_or_explicit32(obj, arg, order) \
(order == memory_order_relaxed \ (order == memory_order_relaxed \
? InterlockedOrNoFence((atomic_int_fast32_t *)obj, arg) \ ? InterlockedOrNoFence((atomic_int_fast32_t *)obj, arg) \
@@ -340,15 +408,18 @@ atomic_or_abort(void) {
ISC_UNREACHABLE(); ISC_UNREACHABLE();
} }
#define atomic_fetch_or_explicit(obj, arg, order) \ #define atomic_fetch_or_explicit(obj, arg, order) \
(sizeof(*(obj)) == 8 \ (sizeof(*(obj)) == 8 \
? atomic_fetch_or_explicit64(obj, arg, order) \ ? atomic_fetch_or_explicit64(obj, arg, order) \
: (sizeof(*(obj)) == 4 \ : (sizeof(*(obj)) == 4 \
? atomic_fetch_or_explicit32(obj, arg, order) \ ? atomic_fetch_or_explicit32(obj, arg, order) \
: (sizeof(*(obj)) == 1 \ : (sizeof(*(obj)) == 2 \
? atomic_fetch_or_explicit8(obj, arg, \ ? atomic_fetch_or_explicit16(obj, arg, \
order) \ order) \
: atomic_or_abort()))) : (sizeof(*(obj)) == 1 \
? atomic_fetch_or_explicit8( \
obj, arg, order) \
: atomic_or_abort()))))
#define atomic_fetch_or(obj, arg) \ #define atomic_fetch_or(obj, arg) \
atomic_fetch_or_explicit(obj, arg, memory_order_seq_cst) atomic_fetch_or_explicit(obj, arg, memory_order_seq_cst)
@@ -372,6 +443,25 @@ atomic_compare_exchange_strong_explicit8(atomic_int_fast8_t *obj,
return (__r); return (__r);
} }
static inline bool
atomic_compare_exchange_strong_explicit16(atomic_short *obj, short *expected,
short desired, memory_order succ,
memory_order fail) {
bool __r;
short __v;
UNUSED(succ);
UNUSED(fail);
__v = InterlockedCompareExchange16((atomic_short *)obj, desired,
*expected);
__r = (*(expected) == __v);
if (!__r) {
*(expected) = __v;
}
return (__r);
}
static inline bool static inline bool
atomic_compare_exchange_strong_explicit32(atomic_int_fast32_t *obj, atomic_compare_exchange_strong_explicit32(atomic_int_fast32_t *obj,
int32_t *expected, int32_t desired, int32_t *expected, int32_t desired,
@@ -455,19 +545,24 @@ atomic_compare_exchange_abort(void) {
ISC_UNREACHABLE(); ISC_UNREACHABLE();
} }
#define atomic_compare_exchange_strong_explicit(obj, expected, desired, succ, \ #define atomic_compare_exchange_strong_explicit(obj, expected, desired, succ, \
fail) \ fail) \
(sizeof(*(obj)) == 8 \ (sizeof(*(obj)) == 8 \
? atomic_compare_exchange_strong_explicit64( \ ? atomic_compare_exchange_strong_explicit64( \
obj, expected, desired, succ, fail) \ obj, expected, desired, succ, fail) \
: (sizeof(*(obj)) == 4 \ : (sizeof(*(obj)) == 4 \
? atomic_compare_exchange_strong_explicit32( \ ? atomic_compare_exchange_strong_explicit32( \
obj, expected, desired, succ, fail) \ obj, expected, desired, succ, fail) \
: (sizeof(*(obj)) == 1 \ : (sizeof(*(obj)) == 2 \
? atomic_compare_exchange_strong_explicit8( \ ? atomic_compare_exchange_strong_explicit16( \
obj, expected, desired, succ, \ obj, expected, desired, succ, \
fail) \ fail) \
: atomic_compare_exchange_abort()))) : (sizeof(*(obj)) == 1 \
? atomic_compare_exchange_strong_explicit8( \
obj, expected, \
desired, succ, \
fail) \
: atomic_compare_exchange_abort()))))
#define atomic_compare_exchange_strong(obj, expected, desired) \ #define atomic_compare_exchange_strong(obj, expected, desired) \
atomic_compare_exchange_strong_explicit(obj, expected, desired, \ atomic_compare_exchange_strong_explicit(obj, expected, desired, \
@@ -490,14 +585,17 @@ atomic_exchange_abort(void) {
ISC_UNREACHABLE(); ISC_UNREACHABLE();
} }
#define atomic_exchange_explicit(obj, desired, order) \ #define atomic_exchange_explicit(obj, desired, order) \
(sizeof(*(obj)) == 8 \ (sizeof(*(obj)) == 8 \
? InterlockedExchange64(obj, desired) \ ? InterlockedExchange64(obj, desired) \
: (sizeof(*(obj)) == 4 \ : (sizeof(*(obj)) == 4 \
? InterlockedExchange(obj, desired) \ ? InterlockedExchange(obj, desired) \
: (sizeof(*(obj)) == 1 \ : (sizeof(*(obj)) == 2 \
? InterlockedExchange8(obj, desired) \ ? InterlockedExchange16(obj, desired) \
: atomic_exchange_abort()))) : (sizeof(*(obj)) == 1 \
? InterlockedExchange8( \
obj, desired) \
: atomic_exchange_abort()))))
#define atomic_exchange(obj, desired) \ #define atomic_exchange(obj, desired) \
atomic_exchange_explicit(obj, desired, memory_order_seq_cst) atomic_exchange_explicit(obj, desired, memory_order_seq_cst)