ClockTimer.h

ClockTimer.h

/**
 * @file utility/ClockTimer.h
 *
 * Created      <2009-03-02 16:37:39 Ian Yang>
 * Last Updated <2009-03-02 16:37:45 Ian Yang>
 */
#ifndef UTILITY_CLOCK_TIMER_H
#define UTILITY_CLOCK_TIMER_H

#include <boost/date_time/posix_time/posix_time.hpp>

namespace util {

class ClockTimer
{
public:
    ClockTimer()
    : start_(boost::posix_time::microsec_clock::local_time())
    {}

    void restart()
    {
        start_ = boost::posix_time::microsec_clock::local_time();
    }

    double elapsed() const
    {
        boost::posix_time::time_duration td =
            boost::posix_time::microsec_clock::local_time() -
            start_;

        return static_cast<double>(td.fractional_seconds()) /
            boost::posix_time::time_duration::ticks_per_second()
            + td.total_seconds();
    }

private:
    boost::posix_time::ptime start_;
};


} // namespace util

#endif // UTILITY_CLOCK_TIMER_H