sliding_window_counter.h

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#ifndef MYSQL_CSA_SLIDING_WINDOW_COUNTER_H
#define MYSQL_CSA_SLIDING_WINDOW_COUNTER_H
 
namespace mysql::csa {
 
/// @brief Calculates statistic value in a time window
struct Sliding_window_counter {
  /// @brief Previous global counter
  unsigned long long m_previous{0};
  /// @brief Counter in the current window
  unsigned long long m_value{0};
  /// @brief Updates the window counter
  /// @param current Global value, registered at current point of time
  void update(unsigned long long current);
  /// @brief Obtains the value in the current time window
  unsigned long long get() const;
};
 
}  // namespace mysql::csa
 
#endif  // MYSQL_CSA_SLIDING_WINDOW_COUNTER_H