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/* Copyright (C) 2010 webis.de
 * All rights reserved.
 */
#ifndef AITOOLS_INVERTEDINDEX_TIMER_HPP
#define AITOOLS_INVERTEDINDEX_TIMER_HPP

#include <boost/timer.hpp>

#ifdef _WIN32 // this is also defined on Win64 platforms by default

namespace aitools {
namespace invertedindex {

typedef boost::timer Timer;

} // namespace invertedindex
} // namespace aitools

#else
#include <sys/time.h>

namespace aitools {
namespace invertedindex {

class Timer : public boost::timer {

private: // class member

        static const double divisor = 1000000;

public: // c'tor / d'tor

        Timer()
        {
                ::gettimeofday(&time_, NULL);
        }

public: // methods

        void restart()
        {
                ::gettimeofday(&time_, NULL);
        }

        double elapsed() const
        {
                ::timeval now;
                ::gettimeofday(&now, NULL);
                return (now.tv_sec - time_.tv_sec) +
                           (now.tv_usec - time_.tv_usec) / divisor;
        }

        double elapsed_max() const
        {
                return double((std::numeric_limits<__time_t>::max)()) - time_.tv_sec;
        }

        double elapsed_min() const
        {
                return double((std::numeric_limits<__suseconds_t>::min)());
        }

private: // member

        ::timeval time_;

};

} // namespace invertedindex
} // namespace aitools

#endif // Not defined _WIN32
#endif // AITOOLS_INVERTEDINDEX_TIMER_HPP

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