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atomic_ops: Implement AtomicCompareAndSwap with writeback

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merry 2022-04-02 21:05:31 +01:00
parent c562c1d6be
commit 084bd225dc
1 changed files with 73 additions and 0 deletions
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73
src/common/atomic_ops.h
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@ -46,6 +46,43 @@ namespace Common {
reinterpret_cast<__int64*>(expected.data())) != 0; reinterpret_cast<__int64*>(expected.data())) != 0;
} }
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected,
u8& actual) {
actual =
_InterlockedCompareExchange8(reinterpret_cast<volatile char*>(pointer), value, expected);
return actual == expected;
}
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u16* pointer, u16 value, u16 expected,
u16& actual) {
actual =
_InterlockedCompareExchange16(reinterpret_cast<volatile short*>(pointer), value, expected);
return actual == expected;
}
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u32* pointer, u32 value, u32 expected,
u32& actual) {
actual =
_InterlockedCompareExchange(reinterpret_cast<volatile long*>(pointer), value, expected);
return actual == expected;
}
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u64 value, u64 expected,
u64& actual) {
actual = _InterlockedCompareExchange64(reinterpret_cast<volatile __int64*>(pointer), value,
expected);
return actual == expected;
}
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u128 value, u128 expected,
u128& actual) {
const bool result =
_InterlockedCompareExchange128(reinterpret_cast<volatile __int64*>(pointer), value[1],
value[0], reinterpret_cast<__int64*>(expected.data())) != 0;
actual = expected;
return result;
}
[[nodiscard]] inline u128 AtomicLoad128(volatile u64* pointer) { [[nodiscard]] inline u128 AtomicLoad128(volatile u64* pointer) {
u128 result{}; u128 result{};
_InterlockedCompareExchange128(reinterpret_cast<volatile __int64*>(pointer), result[1], _InterlockedCompareExchange128(reinterpret_cast<volatile __int64*>(pointer), result[1],
@ -79,6 +116,42 @@ namespace Common {
return __sync_bool_compare_and_swap((unsigned __int128*)pointer, expected_a, value_a); return __sync_bool_compare_and_swap((unsigned __int128*)pointer, expected_a, value_a);
} }
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected,
u8& actual) {
actual = __sync_val_compare_and_swap(pointer, expected, value);
return actual == expected;
}
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u16* pointer, u16 value, u16 expected,
u16& actual) {
actual = __sync_val_compare_and_swap(pointer, expected, value);
return actual == expected;
}
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u32* pointer, u32 value, u32 expected,
u32& actual) {
actual = __sync_val_compare_and_swap(pointer, expected, value);
return actual == expected;
}
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u64 value, u64 expected,
u64& actual) {
actual = __sync_val_compare_and_swap(pointer, expected, value);
return actual == expected;
}
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u128 value, u128 expected,
u128& actual) {
unsigned __int128 value_a;
unsigned __int128 expected_a;
unsigned __int128 actual_a;
std::memcpy(&value_a, value.data(), sizeof(u128));
std::memcpy(&expected_a, expected.data(), sizeof(u128));
actual_a = __sync_val_compare_and_swap((unsigned __int128*)pointer, expected_a, value_a);
std::memcpy(actual.data(), &actual_a, sizeof(u128));
return actual_a == expected_a;
}
[[nodiscard]] inline u128 AtomicLoad128(volatile u64* pointer) { [[nodiscard]] inline u128 AtomicLoad128(volatile u64* pointer) {
unsigned __int128 zeros_a = 0; unsigned __int128 zeros_a = 0;
unsigned __int128 result_a = unsigned __int128 result_a =