/*****************************************************************************
 *
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2015 Artem Pavlenko
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *****************************************************************************/

#ifndef MAPNIK_UTIL_TIMER_HPP
#define MAPNIK_UTIL_TIMER_HPP

#include <string>
#include <chrono>

namespace mapnik {

class auto_cpu_timer
{
public:
    auto_cpu_timer(std::ostream & os, std::string const& message)
        : start_(std::chrono::system_clock::now()),
          os_(os),
          message_(message) {}

    ~auto_cpu_timer()
    {
        std::chrono::duration<double,std::milli> elapsed = std::chrono::system_clock::now() - start_;
        os_ << message_ << std::chrono::duration_cast<std::chrono::milliseconds>(elapsed).count() << " ms" << std::endl;
    }
private:
    std::chrono::time_point<std::chrono::system_clock> start_;
    std::ostream & os_;
    std::string message_;
};

// NOTE : add more timers here

}

#endif // MAPNIK_UTIL_TIMER_HPP
