70 lines
2.2 KiB
C++
70 lines
2.2 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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#include <cstring>
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#include "common/atomic_ops.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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bool AtomicCompareAndSwap(u8 volatile* pointer, u8 value, u8 expected) {
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u8 result = _InterlockedCompareExchange8((char*)pointer, value, expected);
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return result == expected;
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}
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bool AtomicCompareAndSwap(u16 volatile* pointer, u16 value, u16 expected) {
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u16 result = _InterlockedCompareExchange16((short*)pointer, value, expected);
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return result == expected;
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}
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bool AtomicCompareAndSwap(u32 volatile* pointer, u32 value, u32 expected) {
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u32 result = _InterlockedCompareExchange((long*)pointer, value, expected);
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return result == expected;
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}
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bool AtomicCompareAndSwap(u64 volatile* pointer, u64 value, u64 expected) {
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u64 result = _InterlockedCompareExchange64((__int64*)pointer, value, expected);
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return result == expected;
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}
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bool AtomicCompareAndSwap(u64 volatile* pointer, u128 value, u128 expected) {
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return _InterlockedCompareExchange128((__int64*)pointer, value[1], value[0],
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(__int64*)expected.data()) != 0;
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}
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#else
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bool AtomicCompareAndSwap(u8 volatile* 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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bool AtomicCompareAndSwap(u16 volatile* 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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bool AtomicCompareAndSwap(u32 volatile* 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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bool AtomicCompareAndSwap(u64 volatile* 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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bool AtomicCompareAndSwap(u64 volatile* 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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