time_based_metric_interface.h

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/*
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   it under the terms of the GNU General Public License, version 2.0,
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#ifndef CS_TIME_BASED_METRIC_H
#define CS_TIME_BASED_METRIC_H
 
#include <cstdint>  // int64_t
 
/// @brief Abstract class for time based metrics implementations
class Time_based_metric_interface {
 public:
  virtual ~Time_based_metric_interface() = default;
 
  /// @brief Resets the counter and summed time to 0
  virtual void reset() = 0;
 
  /// @brief Starts counting time we are waiting on something
  virtual void start_timer() = 0;
 
  /// @brief Stops the timer for the wait.
  ///        Requires start_timer to be called first
  virtual void stop_timer() = 0;
 
  /// @brief Returns the total time waited across all executions of the
  /// start/stop methods, minus the absolute start time of the last one in case
  /// it has not ended.
  /// @return The total time waited, in nanoseconds.
  virtual int64_t get_sum_time_elapsed() const = 0;
 
  /// @brief Increments the waiting counter
  virtual void increment_counter() = 0;
 
  /// @brief Returns the number of times we waited on give spot
  /// @return the number of times waited
  virtual int64_t get_count() const = 0;
};
 
#endif /* CS_TIME_BASED_METRIC_H */