Timer.h

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/*
 *  CepGen: a central exclusive processes event generator
 *  Copyright (C) 2013-2021  Laurent Forthomme
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef CepGen_Utils_Timer_h
#define CepGen_Utils_Timer_h
 
#include <chrono>
 
namespace cepgen {
  namespace utils {
    class Timer {
    public:
      inline Timer() { reset(); }
      ~Timer() = default;
      inline double elapsed() const {
        auto end = std::chrono::high_resolution_clock::now();
        return std::chrono::duration<double>(end - beg_).count();
      }
      inline void reset() { beg_ = std::chrono::high_resolution_clock::now(); }
 
    private:
      std::chrono::time_point<std::chrono::high_resolution_clock> beg_;
    };
  }  // namespace utils
}  // namespace cepgen
 
#endif