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pyatomic_msc.h
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970 lines (828 loc) · 25.2 KB
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// This is the implementation of Python atomic operations for MSVC if the
// compiler does not support C11 or C++11 atomics.
//
// MSVC intrinsics are defined on char, short, long, __int64, and pointer
// types. Note that long and int are both 32-bits even on 64-bit Windows,
// so operations on int are cast to long.
//
// The volatile keyword has additional memory ordering semantics on MSVC. On
// x86 and x86-64, volatile accesses have acquire-release semantics. On ARM64,
// volatile accesses behave like C11's memory_order_relaxed.
#ifndef Py_ATOMIC_MSC_H
# error "this header file must not be included directly"
#endif
#include <intrin.h>
#define _Py_atomic_ASSERT_ARG_TYPE(TYPE) \
Py_BUILD_ASSERT(sizeof(*obj) == sizeof(TYPE))
// --- _Py_atomic_add --------------------------------------------------------
static inline int8_t
_Py_atomic_add_int8(int8_t *obj, int8_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(char);
return (int8_t)_InterlockedExchangeAdd8((volatile char *)obj, (char)value);
}
static inline int16_t
_Py_atomic_add_int16(int16_t *obj, int16_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(short);
return (int16_t)_InterlockedExchangeAdd16((volatile short *)obj, (short)value);
}
static inline int32_t
_Py_atomic_add_int32(int32_t *obj, int32_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(long);
return (int32_t)_InterlockedExchangeAdd((volatile long *)obj, (long)value);
}
static inline int64_t
_Py_atomic_add_int64(int64_t *obj, int64_t value)
{
#if defined(_M_X64) || defined(_M_ARM64)
_Py_atomic_ASSERT_ARG_TYPE(__int64);
return (int64_t)_InterlockedExchangeAdd64((volatile __int64 *)obj, (__int64)value);
#else
int64_t old_value = _Py_atomic_load_int64_relaxed(obj);
for (;;) {
int64_t new_value = old_value + value;
if (_Py_atomic_compare_exchange_int64(obj, &old_value, new_value)) {
return old_value;
}
}
#endif
}
static inline uint8_t
_Py_atomic_add_uint8(uint8_t *obj, uint8_t value)
{
return (uint8_t)_Py_atomic_add_int8((int8_t *)obj, (int8_t)value);
}
static inline uint16_t
_Py_atomic_add_uint16(uint16_t *obj, uint16_t value)
{
return (uint16_t)_Py_atomic_add_int16((int16_t *)obj, (int16_t)value);
}
static inline uint32_t
_Py_atomic_add_uint32(uint32_t *obj, uint32_t value)
{
return (uint32_t)_Py_atomic_add_int32((int32_t *)obj, (int32_t)value);
}
static inline int
_Py_atomic_add_int(int *obj, int value)
{
_Py_atomic_ASSERT_ARG_TYPE(int32_t);
return (int)_Py_atomic_add_int32((int32_t *)obj, (int32_t)value);
}
static inline unsigned int
_Py_atomic_add_uint(unsigned int *obj, unsigned int value)
{
_Py_atomic_ASSERT_ARG_TYPE(int32_t);
return (unsigned int)_Py_atomic_add_int32((int32_t *)obj, (int32_t)value);
}
static inline uint64_t
_Py_atomic_add_uint64(uint64_t *obj, uint64_t value)
{
return (uint64_t)_Py_atomic_add_int64((int64_t *)obj, (int64_t)value);
}
static inline intptr_t
_Py_atomic_add_intptr(intptr_t *obj, intptr_t value)
{
#if SIZEOF_VOID_P == 8
_Py_atomic_ASSERT_ARG_TYPE(int64_t);
return (intptr_t)_Py_atomic_add_int64((int64_t *)obj, (int64_t)value);
#else
_Py_atomic_ASSERT_ARG_TYPE(int32_t);
return (intptr_t)_Py_atomic_add_int32((int32_t *)obj, (int32_t)value);
#endif
}
static inline uintptr_t
_Py_atomic_add_uintptr(uintptr_t *obj, uintptr_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(intptr_t);
return (uintptr_t)_Py_atomic_add_intptr((intptr_t *)obj, (intptr_t)value);
}
static inline Py_ssize_t
_Py_atomic_add_ssize(Py_ssize_t *obj, Py_ssize_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(intptr_t);
return (Py_ssize_t)_Py_atomic_add_intptr((intptr_t *)obj, (intptr_t)value);
}
// --- _Py_atomic_compare_exchange -------------------------------------------
static inline int
_Py_atomic_compare_exchange_int8(int8_t *obj, int8_t *expected, int8_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(char);
int8_t initial = (int8_t)_InterlockedCompareExchange8(
(volatile char *)obj,
(char)value,
(char)*expected);
if (initial == *expected) {
return 1;
}
*expected = initial;
return 0;
}
static inline int
_Py_atomic_compare_exchange_int16(int16_t *obj, int16_t *expected, int16_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(short);
int16_t initial = (int16_t)_InterlockedCompareExchange16(
(volatile short *)obj,
(short)value,
(short)*expected);
if (initial == *expected) {
return 1;
}
*expected = initial;
return 0;
}
static inline int
_Py_atomic_compare_exchange_int32(int32_t *obj, int32_t *expected, int32_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(long);
int32_t initial = (int32_t)_InterlockedCompareExchange(
(volatile long *)obj,
(long)value,
(long)*expected);
if (initial == *expected) {
return 1;
}
*expected = initial;
return 0;
}
static inline int
_Py_atomic_compare_exchange_int64(int64_t *obj, int64_t *expected, int64_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(__int64);
int64_t initial = (int64_t)_InterlockedCompareExchange64(
(volatile __int64 *)obj,
(__int64)value,
(__int64)*expected);
if (initial == *expected) {
return 1;
}
*expected = initial;
return 0;
}
static inline int
_Py_atomic_compare_exchange_ptr(void *obj, void *expected, void *value)
{
void *initial = _InterlockedCompareExchangePointer(
(void**)obj,
value,
*(void**)expected);
if (initial == *(void**)expected) {
return 1;
}
*(void**)expected = initial;
return 0;
}
static inline int
_Py_atomic_compare_exchange_uint8(uint8_t *obj, uint8_t *expected, uint8_t value)
{
return _Py_atomic_compare_exchange_int8((int8_t *)obj,
(int8_t *)expected,
(int8_t)value);
}
static inline int
_Py_atomic_compare_exchange_uint16(uint16_t *obj, uint16_t *expected, uint16_t value)
{
return _Py_atomic_compare_exchange_int16((int16_t *)obj,
(int16_t *)expected,
(int16_t)value);
}
static inline int
_Py_atomic_compare_exchange_uint32(uint32_t *obj, uint32_t *expected, uint32_t value)
{
return _Py_atomic_compare_exchange_int32((int32_t *)obj,
(int32_t *)expected,
(int32_t)value);
}
static inline int
_Py_atomic_compare_exchange_int(int *obj, int *expected, int value)
{
_Py_atomic_ASSERT_ARG_TYPE(int32_t);
return _Py_atomic_compare_exchange_int32((int32_t *)obj,
(int32_t *)expected,
(int32_t)value);
}
static inline int
_Py_atomic_compare_exchange_uint(unsigned int *obj, unsigned int *expected, unsigned int value)
{
_Py_atomic_ASSERT_ARG_TYPE(int32_t);
return _Py_atomic_compare_exchange_int32((int32_t *)obj,
(int32_t *)expected,
(int32_t)value);
}
static inline int
_Py_atomic_compare_exchange_uint64(uint64_t *obj, uint64_t *expected, uint64_t value)
{
return _Py_atomic_compare_exchange_int64((int64_t *)obj,
(int64_t *)expected,
(int64_t)value);
}
static inline int
_Py_atomic_compare_exchange_intptr(intptr_t *obj, intptr_t *expected, intptr_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(void*);
return _Py_atomic_compare_exchange_ptr((void**)obj,
(void**)expected,
(void*)value);
}
static inline int
_Py_atomic_compare_exchange_uintptr(uintptr_t *obj, uintptr_t *expected, uintptr_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(void*);
return _Py_atomic_compare_exchange_ptr((void**)obj,
(void**)expected,
(void*)value);
}
static inline int
_Py_atomic_compare_exchange_ssize(Py_ssize_t *obj, Py_ssize_t *expected, Py_ssize_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(void*);
return _Py_atomic_compare_exchange_ptr((void**)obj,
(void**)expected,
(void*)value);
}
// --- _Py_atomic_exchange ---------------------------------------------------
static inline int8_t
_Py_atomic_exchange_int8(int8_t *obj, int8_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(char);
return (int8_t)_InterlockedExchange8((volatile char *)obj, (char)value);
}
static inline int16_t
_Py_atomic_exchange_int16(int16_t *obj, int16_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(short);
return (int16_t)_InterlockedExchange16((volatile short *)obj, (short)value);
}
static inline int32_t
_Py_atomic_exchange_int32(int32_t *obj, int32_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(long);
return (int32_t)_InterlockedExchange((volatile long *)obj, (long)value);
}
static inline int64_t
_Py_atomic_exchange_int64(int64_t *obj, int64_t value)
{
#if defined(_M_X64) || defined(_M_ARM64)
_Py_atomic_ASSERT_ARG_TYPE(__int64);
return (int64_t)_InterlockedExchange64((volatile __int64 *)obj, (__int64)value);
#else
int64_t old_value = _Py_atomic_load_int64_relaxed(obj);
for (;;) {
if (_Py_atomic_compare_exchange_int64(obj, &old_value, value)) {
return old_value;
}
}
#endif
}
static inline void*
_Py_atomic_exchange_ptr(void *obj, void *value)
{
return (void*)_InterlockedExchangePointer((void * volatile *)obj, (void *)value);
}
static inline uint8_t
_Py_atomic_exchange_uint8(uint8_t *obj, uint8_t value)
{
return (uint8_t)_Py_atomic_exchange_int8((int8_t *)obj,
(int8_t)value);
}
static inline uint16_t
_Py_atomic_exchange_uint16(uint16_t *obj, uint16_t value)
{
return (uint16_t)_Py_atomic_exchange_int16((int16_t *)obj,
(int16_t)value);
}
static inline uint32_t
_Py_atomic_exchange_uint32(uint32_t *obj, uint32_t value)
{
return (uint32_t)_Py_atomic_exchange_int32((int32_t *)obj,
(int32_t)value);
}
static inline int
_Py_atomic_exchange_int(int *obj, int value)
{
_Py_atomic_ASSERT_ARG_TYPE(int32_t);
return (int)_Py_atomic_exchange_int32((int32_t *)obj,
(int32_t)value);
}
static inline unsigned int
_Py_atomic_exchange_uint(unsigned int *obj, unsigned int value)
{
_Py_atomic_ASSERT_ARG_TYPE(int32_t);
return (unsigned int)_Py_atomic_exchange_int32((int32_t *)obj,
(int32_t)value);
}
static inline uint64_t
_Py_atomic_exchange_uint64(uint64_t *obj, uint64_t value)
{
return (uint64_t)_Py_atomic_exchange_int64((int64_t *)obj,
(int64_t)value);
}
static inline intptr_t
_Py_atomic_exchange_intptr(intptr_t *obj, intptr_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(void*);
return (intptr_t)_Py_atomic_exchange_ptr((void**)obj,
(void*)value);
}
static inline uintptr_t
_Py_atomic_exchange_uintptr(uintptr_t *obj, uintptr_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(void*);
return (uintptr_t)_Py_atomic_exchange_ptr((void**)obj,
(void*)value);
}
static inline Py_ssize_t
_Py_atomic_exchange_ssize(Py_ssize_t *obj, Py_ssize_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(void*);
return (Py_ssize_t)_Py_atomic_exchange_ptr((void**)obj,
(void*)value);
}
// --- _Py_atomic_and --------------------------------------------------------
static inline uint8_t
_Py_atomic_and_uint8(uint8_t *obj, uint8_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(char);
return (uint8_t)_InterlockedAnd8((volatile char *)obj, (char)value);
}
static inline uint16_t
_Py_atomic_and_uint16(uint16_t *obj, uint16_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(short);
return (uint16_t)_InterlockedAnd16((volatile short *)obj, (short)value);
}
static inline uint32_t
_Py_atomic_and_uint32(uint32_t *obj, uint32_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(long);
return (uint32_t)_InterlockedAnd((volatile long *)obj, (long)value);
}
static inline uint64_t
_Py_atomic_and_uint64(uint64_t *obj, uint64_t value)
{
#if defined(_M_X64) || defined(_M_ARM64)
_Py_atomic_ASSERT_ARG_TYPE(__int64);
return (uint64_t)_InterlockedAnd64((volatile __int64 *)obj, (__int64)value);
#else
uint64_t old_value = _Py_atomic_load_uint64_relaxed(obj);
for (;;) {
uint64_t new_value = old_value & value;
if (_Py_atomic_compare_exchange_uint64(obj, &old_value, new_value)) {
return old_value;
}
}
#endif
}
static inline uintptr_t
_Py_atomic_and_uintptr(uintptr_t *obj, uintptr_t value)
{
#if SIZEOF_VOID_P == 8
_Py_atomic_ASSERT_ARG_TYPE(uint64_t);
return (uintptr_t)_Py_atomic_and_uint64((uint64_t *)obj,
(uint64_t)value);
#else
_Py_atomic_ASSERT_ARG_TYPE(uint32_t);
return (uintptr_t)_Py_atomic_and_uint32((uint32_t *)obj,
(uint32_t)value);
#endif
}
// --- _Py_atomic_or ---------------------------------------------------------
static inline uint8_t
_Py_atomic_or_uint8(uint8_t *obj, uint8_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(char);
return (uint8_t)_InterlockedOr8((volatile char *)obj, (char)value);
}
static inline uint16_t
_Py_atomic_or_uint16(uint16_t *obj, uint16_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(short);
return (uint16_t)_InterlockedOr16((volatile short *)obj, (short)value);
}
static inline uint32_t
_Py_atomic_or_uint32(uint32_t *obj, uint32_t value)
{
_Py_atomic_ASSERT_ARG_TYPE(long);
return (uint32_t)_InterlockedOr((volatile long *)obj, (long)value);
}
static inline uint64_t
_Py_atomic_or_uint64(uint64_t *obj, uint64_t value)
{
#if defined(_M_X64) || defined(_M_ARM64)
_Py_atomic_ASSERT_ARG_TYPE(__int64);
return (uint64_t)_InterlockedOr64((volatile __int64 *)obj, (__int64)value);
#else
uint64_t old_value = _Py_atomic_load_uint64_relaxed(obj);
for (;;) {
uint64_t new_value = old_value | value;
if (_Py_atomic_compare_exchange_uint64(obj, &old_value, new_value)) {
return old_value;
}
}
#endif
}
static inline uintptr_t
_Py_atomic_or_uintptr(uintptr_t *obj, uintptr_t value)
{
#if SIZEOF_VOID_P == 8
_Py_atomic_ASSERT_ARG_TYPE(uint64_t);
return (uintptr_t)_Py_atomic_or_uint64((uint64_t *)obj,
(uint64_t)value);
#else
_Py_atomic_ASSERT_ARG_TYPE(uint32_t);
return (uintptr_t)_Py_atomic_or_uint32((uint32_t *)obj,
(uint32_t)value);
#endif
}
// --- _Py_atomic_load -------------------------------------------------------
static inline uint8_t
_Py_atomic_load_uint8(const uint8_t *obj)
{
#if defined(_M_X64) || defined(_M_IX86)
return *(volatile uint8_t *)obj;
#elif defined(_M_ARM64)
return (uint8_t)__ldar8((unsigned __int8 volatile *)obj);
#else
# error "no implementation of _Py_atomic_load_uint8"
#endif
}
static inline uint16_t
_Py_atomic_load_uint16(const uint16_t *obj)
{
#if defined(_M_X64) || defined(_M_IX86)
return *(volatile uint16_t *)obj;
#elif defined(_M_ARM64)
return (uint16_t)__ldar16((unsigned __int16 volatile *)obj);
#else
# error "no implementation of _Py_atomic_load_uint16"
#endif
}
static inline uint32_t
_Py_atomic_load_uint32(const uint32_t *obj)
{
#if defined(_M_X64) || defined(_M_IX86)
return *(volatile uint32_t *)obj;
#elif defined(_M_ARM64)
return (uint32_t)__ldar32((unsigned __int32 volatile *)obj);
#else
# error "no implementation of _Py_atomic_load_uint32"
#endif
}
static inline uint64_t
_Py_atomic_load_uint64(const uint64_t *obj)
{
#if defined(_M_X64) || defined(_M_IX86)
return *(volatile uint64_t *)obj;
#elif defined(_M_ARM64)
return (uint64_t)__ldar64((unsigned __int64 volatile *)obj);
#else
# error "no implementation of _Py_atomic_load_uint64"
#endif
}
static inline int8_t
_Py_atomic_load_int8(const int8_t *obj)
{
return (int8_t)_Py_atomic_load_uint8((const uint8_t *)obj);
}
static inline int16_t
_Py_atomic_load_int16(const int16_t *obj)
{
return (int16_t)_Py_atomic_load_uint16((const uint16_t *)obj);
}
static inline int32_t
_Py_atomic_load_int32(const int32_t *obj)
{
return (int32_t)_Py_atomic_load_uint32((const uint32_t *)obj);
}
static inline int
_Py_atomic_load_int(const int *obj)
{
_Py_atomic_ASSERT_ARG_TYPE(uint32_t);
return (int)_Py_atomic_load_uint32((uint32_t *)obj);
}
static inline unsigned int
_Py_atomic_load_uint(const unsigned int *obj)
{
_Py_atomic_ASSERT_ARG_TYPE(uint32_t);
return (unsigned int)_Py_atomic_load_uint32((uint32_t *)obj);
}
static inline int64_t
_Py_atomic_load_int64(const int64_t *obj)
{
return (int64_t)_Py_atomic_load_uint64((const uint64_t *)obj);
}
static inline void*
_Py_atomic_load_ptr(const void *obj)
{
#if SIZEOF_VOID_P == 8
return (void*)_Py_atomic_load_uint64((const uint64_t *)obj);
#else
return (void*)_Py_atomic_load_uint32((const uint32_t *)obj);
#endif
}
static inline intptr_t
_Py_atomic_load_intptr(const intptr_t *obj)
{
_Py_atomic_ASSERT_ARG_TYPE(void*);
return (intptr_t)_Py_atomic_load_ptr((void*)obj);
}
static inline uintptr_t
_Py_atomic_load_uintptr(const uintptr_t *obj)
{
_Py_atomic_ASSERT_ARG_TYPE(void*);
return (uintptr_t)_Py_atomic_load_ptr((void*)obj);
}
static inline Py_ssize_t
_Py_atomic_load_ssize(const Py_ssize_t *obj)
{
_Py_atomic_ASSERT_ARG_TYPE(void*);
return (Py_ssize_t)_Py_atomic_load_ptr((void*)obj);
}
// --- _Py_atomic_load_relaxed -----------------------------------------------
static inline int
_Py_atomic_load_int_relaxed(const int *obj)
{
return *(volatile int *)obj;
}
static inline int8_t
_Py_atomic_load_int8_relaxed(const int8_t *obj)
{
return *(volatile int8_t *)obj;
}
static inline int16_t
_Py_atomic_load_int16_relaxed(const int16_t *obj)
{
return *(volatile int16_t *)obj;
}
static inline int32_t
_Py_atomic_load_int32_relaxed(const int32_t *obj)
{
return *(volatile int32_t *)obj;
}
static inline int64_t
_Py_atomic_load_int64_relaxed(const int64_t *obj)
{
return *(volatile int64_t *)obj;
}
static inline intptr_t
_Py_atomic_load_intptr_relaxed(const intptr_t *obj)
{
return *(volatile intptr_t *)obj;
}
static inline uint8_t
_Py_atomic_load_uint8_relaxed(const uint8_t *obj)
{
return *(volatile uint8_t *)obj;
}
static inline uint16_t
_Py_atomic_load_uint16_relaxed(const uint16_t *obj)
{
return *(volatile uint16_t *)obj;
}
static inline uint32_t
_Py_atomic_load_uint32_relaxed(const uint32_t *obj)
{
return *(volatile uint32_t *)obj;
}
static inline uint64_t
_Py_atomic_load_uint64_relaxed(const uint64_t *obj)
{
return *(volatile uint64_t *)obj;
}
static inline uintptr_t
_Py_atomic_load_uintptr_relaxed(const uintptr_t *obj)
{
return *(volatile uintptr_t *)obj;
}
static inline unsigned int
_Py_atomic_load_uint_relaxed(const unsigned int *obj)
{
return *(volatile unsigned int *)obj;
}
static inline Py_ssize_t
_Py_atomic_load_ssize_relaxed(const Py_ssize_t *obj)
{
return *(volatile Py_ssize_t *)obj;
}
static inline void*
_Py_atomic_load_ptr_relaxed(const void *obj)
{
return *(void * volatile *)obj;
}
// --- _Py_atomic_store ------------------------------------------------------
static inline void
_Py_atomic_store_int(int *obj, int value)
{
(void)_Py_atomic_exchange_int(obj, value);
}
static inline void
_Py_atomic_store_int8(int8_t *obj, int8_t value)
{
(void)_Py_atomic_exchange_int8(obj, value);
}
static inline void
_Py_atomic_store_int16(int16_t *obj, int16_t value)
{
(void)_Py_atomic_exchange_int16(obj, value);
}
static inline void
_Py_atomic_store_int32(int32_t *obj, int32_t value)
{
(void)_Py_atomic_exchange_int32(obj, value);
}
static inline void
_Py_atomic_store_int64(int64_t *obj, int64_t value)
{
(void)_Py_atomic_exchange_int64(obj, value);
}
static inline void
_Py_atomic_store_intptr(intptr_t *obj, intptr_t value)
{
(void)_Py_atomic_exchange_intptr(obj, value);
}
static inline void
_Py_atomic_store_uint8(uint8_t *obj, uint8_t value)
{
(void)_Py_atomic_exchange_uint8(obj, value);
}
static inline void
_Py_atomic_store_uint16(uint16_t *obj, uint16_t value)
{
(void)_Py_atomic_exchange_uint16(obj, value);
}
static inline void
_Py_atomic_store_uint32(uint32_t *obj, uint32_t value)
{
(void)_Py_atomic_exchange_uint32(obj, value);
}
static inline void
_Py_atomic_store_uint64(uint64_t *obj, uint64_t value)
{
(void)_Py_atomic_exchange_uint64(obj, value);
}
static inline void
_Py_atomic_store_uintptr(uintptr_t *obj, uintptr_t value)
{
(void)_Py_atomic_exchange_uintptr(obj, value);
}
static inline void
_Py_atomic_store_uint(unsigned int *obj, unsigned int value)
{
(void)_Py_atomic_exchange_uint(obj, value);
}
static inline void
_Py_atomic_store_ptr(void *obj, void *value)
{
(void)_Py_atomic_exchange_ptr(obj, value);
}
static inline void
_Py_atomic_store_ssize(Py_ssize_t *obj, Py_ssize_t value)
{
(void)_Py_atomic_exchange_ssize(obj, value);
}
// --- _Py_atomic_store_relaxed ----------------------------------------------
static inline void
_Py_atomic_store_int_relaxed(int *obj, int value)
{
*(volatile int *)obj = value;
}
static inline void
_Py_atomic_store_int8_relaxed(int8_t *obj, int8_t value)
{
*(volatile int8_t *)obj = value;
}
static inline void
_Py_atomic_store_int16_relaxed(int16_t *obj, int16_t value)
{
*(volatile int16_t *)obj = value;
}
static inline void
_Py_atomic_store_int32_relaxed(int32_t *obj, int32_t value)
{
*(volatile int32_t *)obj = value;
}
static inline void
_Py_atomic_store_int64_relaxed(int64_t *obj, int64_t value)
{
*(volatile int64_t *)obj = value;
}
static inline void
_Py_atomic_store_intptr_relaxed(intptr_t *obj, intptr_t value)
{
*(volatile intptr_t *)obj = value;
}
static inline void
_Py_atomic_store_uint8_relaxed(uint8_t *obj, uint8_t value)
{
*(volatile uint8_t *)obj = value;
}
static inline void
_Py_atomic_store_uint16_relaxed(uint16_t *obj, uint16_t value)
{
*(volatile uint16_t *)obj = value;
}
static inline void
_Py_atomic_store_uint32_relaxed(uint32_t *obj, uint32_t value)
{
*(volatile uint32_t *)obj = value;
}
static inline void
_Py_atomic_store_uint64_relaxed(uint64_t *obj, uint64_t value)
{
*(volatile uint64_t *)obj = value;
}
static inline void
_Py_atomic_store_uintptr_relaxed(uintptr_t *obj, uintptr_t value)
{
*(volatile uintptr_t *)obj = value;
}
static inline void
_Py_atomic_store_uint_relaxed(unsigned int *obj, unsigned int value)
{
*(volatile unsigned int *)obj = value;
}
static inline void
_Py_atomic_store_ptr_relaxed(void *obj, void* value)
{
*(void * volatile *)obj = value;
}
static inline void
_Py_atomic_store_ssize_relaxed(Py_ssize_t *obj, Py_ssize_t value)
{
*(volatile Py_ssize_t *)obj = value;
}
// --- _Py_atomic_load_ptr_acquire / _Py_atomic_store_ptr_release ------------
static inline void *
_Py_atomic_load_ptr_acquire(const void *obj)
{
#if defined(_M_X64) || defined(_M_IX86)
return *(void * volatile *)obj;
#elif defined(_M_ARM64)
return (void *)__ldar64((unsigned __int64 volatile *)obj);
#else
# error "no implementation of _Py_atomic_load_ptr_acquire"
#endif
}
static inline void
_Py_atomic_store_ptr_release(void *obj, void *value)
{
#if defined(_M_X64) || defined(_M_IX86)
*(void * volatile *)obj = value;
#elif defined(_M_ARM64)
__stlr64((unsigned __int64 volatile *)obj, (uintptr_t)value);
#else
# error "no implementation of _Py_atomic_store_ptr_release"
#endif
}
static inline void
_Py_atomic_store_int_release(int *obj, int value)
{
#if defined(_M_X64) || defined(_M_IX86)
*(int volatile *)obj = value;
#elif defined(_M_ARM64)
_Py_atomic_ASSERT_ARG_TYPE(unsigned __int32);
__stlr32((unsigned __int32 volatile *)obj, (unsigned __int32)value);
#else
# error "no implementation of _Py_atomic_store_int_release"
#endif
}
static inline int
_Py_atomic_load_int_acquire(const int *obj)
{
#if defined(_M_X64) || defined(_M_IX86)
return *(int volatile *)obj;
#elif defined(_M_ARM64)
_Py_atomic_ASSERT_ARG_TYPE(unsigned __int32);
return (int)__ldar32((unsigned __int32 volatile *)obj);
#else
# error "no implementation of _Py_atomic_load_int_acquire"
#endif
}
// --- _Py_atomic_fence ------------------------------------------------------
static inline void
_Py_atomic_fence_seq_cst(void)
{
#if defined(_M_ARM64)
__dmb(_ARM64_BARRIER_ISH);
#elif defined(_M_X64)
__faststorefence();
#elif defined(_M_IX86)
_mm_mfence();
#else
# error "no implementation of _Py_atomic_fence_seq_cst"
#endif
}
static inline void
_Py_atomic_fence_release(void)
{
#if defined(_M_ARM64)
__dmb(_ARM64_BARRIER_ISH);
#elif defined(_M_X64) || defined(_M_IX86)
_ReadWriteBarrier();
#else
# error "no implementation of _Py_atomic_fence_release"
#endif
}
#undef _Py_atomic_ASSERT_ARG_TYPE