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authorFernando Sahmkow <fsahmkow27@gmail.com>2021-01-02 02:24:49 +0100
committerFernando Sahmkow <fsahmkow27@gmail.com>2021-01-02 04:00:27 +0100
commit53d92318b82cd4a9e08f814fcb8aab624d795c6c (patch)
tree4f5236ffebdcf947297d8ace42151b36810f3144 /src/common/atomic_ops.h
parentX86/NativeClock: Improve performance of clock calculations on hot path. (diff)
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Diffstat (limited to 'src/common/atomic_ops.h')
-rw-r--r--src/common/atomic_ops.h71
1 files changed, 66 insertions, 5 deletions
diff --git a/src/common/atomic_ops.h b/src/common/atomic_ops.h
index b46888589..2b1f515e8 100644
--- a/src/common/atomic_ops.h
+++ b/src/common/atomic_ops.h
@@ -4,14 +4,75 @@
#pragma once
+#include <cstring>
+#include <memory>
+
#include "common/common_types.h"
+#if _MSC_VER
+#include <intrin.h>
+#endif
+
namespace Common {
-[[nodiscard]] bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected);
-[[nodiscard]] bool AtomicCompareAndSwap(volatile u16* pointer, u16 value, u16 expected);
-[[nodiscard]] bool AtomicCompareAndSwap(volatile u32* pointer, u32 value, u32 expected);
-[[nodiscard]] bool AtomicCompareAndSwap(volatile u64* pointer, u64 value, u64 expected);
-[[nodiscard]] bool AtomicCompareAndSwap(volatile u64* pointer, u128 value, u128 expected);
+#if _MSC_VER
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected) {
+ const u8 result =
+ _InterlockedCompareExchange8(reinterpret_cast<volatile char*>(pointer), value, expected);
+ return result == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u16* pointer, u16 value, u16 expected) {
+ const u16 result =
+ _InterlockedCompareExchange16(reinterpret_cast<volatile short*>(pointer), value, expected);
+ return result == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u32* pointer, u32 value, u32 expected) {
+ const u32 result =
+ _InterlockedCompareExchange(reinterpret_cast<volatile long*>(pointer), value, expected);
+ return result == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u64 value, u64 expected) {
+ const u64 result = _InterlockedCompareExchange64(reinterpret_cast<volatile __int64*>(pointer),
+ value, expected);
+ return result == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u128 value, u128 expected) {
+ return _InterlockedCompareExchange128(reinterpret_cast<volatile __int64*>(pointer), value[1],
+ value[0],
+ reinterpret_cast<__int64*>(expected.data())) != 0;
+}
+
+#else
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected) {
+ return __sync_bool_compare_and_swap(pointer, expected, value);
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u16* pointer, u16 value, u16 expected) {
+ return __sync_bool_compare_and_swap(pointer, expected, value);
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u32* pointer, u32 value, u32 expected) {
+ return __sync_bool_compare_and_swap(pointer, expected, value);
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u64 value, u64 expected) {
+ return __sync_bool_compare_and_swap(pointer, expected, value);
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u128 value, u128 expected) {
+ unsigned __int128 value_a;
+ unsigned __int128 expected_a;
+ std::memcpy(&value_a, value.data(), sizeof(u128));
+ std::memcpy(&expected_a, expected.data(), sizeof(u128));
+ return __sync_bool_compare_and_swap((unsigned __int128*)pointer, expected_a, value_a);
+}
+
+#endif
} // namespace Common