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atomic_ops: Implement AtomicLoad128

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Merry 2022-03-28 23:05:54 +01:00 committed by merry
parent 7f1e66e94b
commit b4746529e1
1 changed files with 17 additions and 0 deletions
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17
src/common/atomic_ops.h
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@ -46,6 +46,13 @@ namespace Common {
reinterpret_cast<__int64*>(expected.data())) != 0;
}
[[nodiscard]] inline u128 AtomicLoad128(volatile u64* pointer) {
u128 result{};
_InterlockedCompareExchange128(reinterpret_cast<volatile __int64*>(pointer), result[1],
result[0], reinterpret_cast<__int64*>(result.data()));
return result;
}
#else
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected) {
@ -72,6 +79,16 @@ namespace Common {
return __sync_bool_compare_and_swap((unsigned __int128*)pointer, expected_a, value_a);
}
[[nodiscard]] inline u128 AtomicLoad128(volatile u64* pointer) {
unsigned __int128 zeros_a = 0;
unsigned __int128 result_a =
__sync_val_compare_and_swap((unsigned __int128*)pointer, zeros_a, zeros_a);
u128 result;
std::memcpy(result.data(), &result_a, sizeof(u128));
return result;
}
#endif
} // namespace Common