diff options
Diffstat (limited to 'src/common/ring_buffer.h')
| -rw-r--r-- | src/common/ring_buffer.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/common/ring_buffer.h b/src/common/ring_buffer.h index 45926c9ec..abe3b4dc2 100644 --- a/src/common/ring_buffer.h +++ b/src/common/ring_buffer.h @@ -9,6 +9,7 @@ #include <atomic> #include <cstddef> #include <cstring> +#include <new> #include <type_traits> #include <vector> #include "common/common_types.h" @@ -29,7 +30,7 @@ class RingBuffer { static_assert(capacity < std::numeric_limits<std::size_t>::max() / 2 / granularity); static_assert((capacity & (capacity - 1)) == 0, "capacity must be a power of two"); // Ensure lock-free. - static_assert(std::atomic<std::size_t>::is_always_lock_free); + static_assert(std::atomic_size_t::is_always_lock_free); public: /// Pushes slots into the ring buffer @@ -102,8 +103,15 @@ public: private: // It is important to align the below variables for performance reasons: // Having them on the same cache-line would result in false-sharing between them. - alignas(128) std::atomic<std::size_t> m_read_index{0}; - alignas(128) std::atomic<std::size_t> m_write_index{0}; + // TODO: Remove this ifdef whenever clang and GCC support + // std::hardware_destructive_interference_size. +#if defined(_MSC_VER) && _MSC_VER >= 1911 + alignas(std::hardware_destructive_interference_size) std::atomic_size_t m_read_index{0}; + alignas(std::hardware_destructive_interference_size) std::atomic_size_t m_write_index{0}; +#else + alignas(128) std::atomic_size_t m_read_index{0}; + alignas(128) std::atomic_size_t m_write_index{0}; +#endif std::array<T, granularity * capacity> m_data; }; |