utl_chrono.h

/*
 * Developer : Alexey Zakharov (alexey.zakharov@vectioneer.com)
 * All rights reserved. Copyright (c) 2015 VECTIONEER.
 */
 
#ifndef UTILS_UTL_CHRONO_H_
#define UTILS_UTL_CHRONO_H_
 
#include <chrono>
#include <utility>
 
namespace mcx {
 
namespace utils {
 
template <typename TimeT = std::chrono::milliseconds>
struct measure {
  template <typename F, typename... Args>
  static typename TimeT::rep execution(F&& func, Args&&... args) {
    auto start = std::chrono::system_clock::now();
    std::forward<decltype(func)>(func)(std::forward<Args>(args)...);
    auto duration = std::chrono::duration_cast<TimeT>(std::chrono::system_clock::now() - start);
    return duration.count();
  }
 
  static void start(void) { start_time_ = std::chrono::system_clock::now(); }
 
  static typename TimeT::rep stop(void) {
    auto duration = std::chrono::duration_cast<TimeT>(std::chrono::system_clock::now() - start_time_);
    return duration.count();
  }
 
  static std::chrono::system_clock::time_point start_time_;
};
 
template <typename TimeT>
std::chrono::system_clock::time_point measure<TimeT>::start_time_;
 
} // namespace utils
 
} // namespace mcx
 
#endif // UTILS_UTL_CHRONO_H_