File size: 970 Bytes
f86fb3b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | #pragma once
#include <cstddef>
#include <new>
namespace quant::core {
// Standard x86_64 / ARM64 cache line size (64 bytes)
constexpr size_t CACHELINE_SIZE = 64;
#if defined(__cpp_lib_hardware_interference_size) && __cpp_lib_hardware_interference_size >= 201703L
constexpr size_t HARDWARE_DESTRUCTIVE_INTERFERENCE_SIZE = std::hardware_destructive_interference_size;
constexpr size_t HARDWARE_CONSTRUCTIVE_INTERFERENCE_SIZE = std::hardware_constructive_interference_size;
#else
constexpr size_t HARDWARE_DESTRUCTIVE_INTERFERENCE_SIZE = CACHELINE_SIZE;
constexpr size_t HARDWARE_CONSTRUCTIVE_INTERFERENCE_SIZE = CACHELINE_SIZE;
#endif
// Padding helper to prevent false sharing between concurrent thread variables
template <size_t Size>
struct CacheLinePad {
static constexpr size_t pad_bytes = (CACHELINE_SIZE - (Size % CACHELINE_SIZE)) % CACHELINE_SIZE;
char pad[pad_bytes == 0 ? CACHELINE_SIZE : pad_bytes];
};
} // namespace quant::core
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