BasicStopWatch.h

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef PMONUTILS_BASICSTOPWATCH_H
#define PMONUTILS_BASICSTOPWATCH_H
 
#include <chrono>
#include <string>
 
#include "tbb/concurrent_hash_map.h"
 
namespace PMonUtils {
 
  typedef tbb::concurrent_hash_map<std::string, double> BasicStopWatchResultMap_t;
 
  class BasicStopWatch {
 
    public:
      // Constructor
      BasicStopWatch(const std::string& name, BasicStopWatchResultMap_t& result) :
        m_name(name), m_result(result), m_start(std::chrono::steady_clock::now()) { }
 
      // Destructor
      ~BasicStopWatch() {
        std::chrono::duration<double, std::milli> total = std::chrono::steady_clock::now() - m_start;
        tbb::concurrent_hash_map<std::string, double>::accessor acc;
        m_result.insert(acc, m_name);
        acc->second += total.count();
        acc.release();
      }
 
    private:
      // Name of the current StopWatch
      std::string m_name;
 
      // Reference to the BasicStopWatchResultMap_t
      BasicStopWatchResultMap_t& m_result;
 
      // Start time of the current StopWatch
      std::chrono::time_point<std::chrono::steady_clock> m_start;
 
  }; // end class BasicStopWatch
 
} // end namespace PMonUtils
 
#endif