LivetimeCounter.hpp

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#ifndef TRIGGER_PLUGINS_LIVETIMECOUNTER_HPP_
#define TRIGGER_PLUGINS_LIVETIMECOUNTER_HPP_
#include <chrono>
#include <map>
#include <mutex>
#include <string>
 
namespace dunedaq::trigger {

class LivetimeCounter
{
public:
  enum class State
  {
    kLive,  // Live to triggers
    kDead,  // Dead to triggers due to a problem
    kPaused // Triggers paused (so we are dead to triggers, but intentionally)
  };

  using state_time_t = uint64_t;

  LivetimeCounter(State state);
 
  ~LivetimeCounter();

  void set_state(State state);

  std::map<State, state_time_t> get_time_map();

  state_time_t get_time(State state);

  std::string get_report_string();
 
  std::string get_state_name(State state) const;
 
private:
  state_time_t now() const;
  // Precondition:  m_mutex is locked by caller
  void update_map();
 
  std::mutex m_mutex;
  State m_state;
  std::map<State, state_time_t> m_state_times;
  state_time_t m_last_state_change_time;
};
} // namespace dunedaq::trigger
 
#endif // TRIGGER_PLUGINS_LIVETIMECOUNTER_HPP_