Function Log

src/include/kernel_log.hpp:143–167

 */
template <Level Lvl, typename... Args>
__always_inline auto Log(etl::format_string<Args...> fmt, Args&&... args)
    -> void {
  if constexpr (Lvl < kMinLevel) {
    return;
  }

  LogEntry entry{};
  entry.seq = log_seq.fetch_add(1, std::memory_order_relaxed);
  entry.core_id = cpu_io::GetCurrentCoreId();
  entry.level = Lvl;
  auto* end = etl::format_to_n(entry.msg, sizeof(entry.msg) - 1, fmt,
                               static_cast<Args&&>(args)...);
  *end = '\0';

  if (!log_queue.push(entry)) {
    // 队列满：尝试排空后重试一次
    TryDrain();
    if (!log_queue.push(entry)) {
      dropped_count.fetch_add(1, std::memory_order_relaxed);
      return;
    }
  }

  TryDrain();
}

}  // namespace detail