79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <cstring>
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#include <memory>
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#include "common/common_types.h"
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#if _MSC_VER
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#include <intrin.h>
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#endif
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namespace Common {
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#if _MSC_VER
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[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected) {
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const u8 result =
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_InterlockedCompareExchange8(reinterpret_cast<volatile char*>(pointer), value, expected);
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return result == expected;
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}
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[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u16* pointer, u16 value, u16 expected) {
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const u16 result =
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_InterlockedCompareExchange16(reinterpret_cast<volatile short*>(pointer), value, expected);
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return result == expected;
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}
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[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u32* pointer, u32 value, u32 expected) {
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const u32 result =
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_InterlockedCompareExchange(reinterpret_cast<volatile long*>(pointer), value, expected);
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return result == expected;
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}
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[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u64 value, u64 expected) {
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const u64 result = _InterlockedCompareExchange64(reinterpret_cast<volatile __int64*>(pointer),
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value, expected);
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return result == expected;
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}
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[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u128 value, u128 expected) {
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return _InterlockedCompareExchange128(reinterpret_cast<volatile __int64*>(pointer), value[1],
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value[0],
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reinterpret_cast<__int64*>(expected.data())) != 0;
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}
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#else
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[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected) {
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return __sync_bool_compare_and_swap(pointer, expected, value);
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}
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[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u16* pointer, u16 value, u16 expected) {
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return __sync_bool_compare_and_swap(pointer, expected, value);
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}
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[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u32* pointer, u32 value, u32 expected) {
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return __sync_bool_compare_and_swap(pointer, expected, value);
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}
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[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u64 value, u64 expected) {
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return __sync_bool_compare_and_swap(pointer, expected, value);
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}
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[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u128 value, u128 expected) {
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unsigned __int128 value_a;
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unsigned __int128 expected_a;
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std::memcpy(&value_a, value.data(), sizeof(u128));
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std::memcpy(&expected_a, expected.data(), sizeof(u128));
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return __sync_bool_compare_and_swap((unsigned __int128*)pointer, expected_a, value_a);
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}
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#endif
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} // namespace Common
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