timer.hpp

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// SPDX-FileCopyrightText: 2025 VTT Technical Research Centre of Finland Ltd
// SPDX-License-Identifier: AGPL-3.0-or-later
 
#ifndef PFC_MPI_TIMER_HPP
#define PFC_MPI_TIMER_HPP
 
#include <iostream>
#include <mpi.h>
#include <string>
 
namespace pfc {
namespace mpi {
 
class timer {
  double tic_;
  double toc_;
  double duration_ = 0.0;
  std::string description_;
 
public:
  void tic();
  double toc();
  double duration() const;
  void reset();
  void description(const std::string &);
  std::string description() const;
  friend std::ostream &operator<<(std::ostream &os, const timer &t);
};
 
inline void timer::reset() { duration_ = 0.0; }
 
inline std::string timer::description() const { return description_; }
 
inline void timer::description(const std::string &description) {
  description_ = description;
}
 
inline std::ostream &operator<<(std::ostream &os, const timer &t) {
  os << t.description();
  return os;
}
 
inline void timer::tic() { tic_ = MPI_Wtime(); }
 
inline double timer::toc() {
  toc_ = MPI_Wtime();
  duration_ += toc_ - tic_;
  return toc_ - tic_;
}
 
} // namespace mpi
} // namespace pfc
 
#endif // PFC_MPI_TIMER_HPP