UPrecisionTimer.h

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//    Copyright (C) 2004-2014 Dylan Blair
//
//    email: dblair@alumni.cs.utexas.edu
//
//    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef UPRECISION_TIMER_H
#define UPRECISION_TIMER_H

#ifdef _WIN32
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>

namespace OpenSkyNet {
    namespace Utils {
        class PrecisionTimer {
            LARGE_INTEGER _freq, _begin, _end, _stamp;
        public:
            PrecisionTimer() { QueryPerformanceFrequency(&_freq); }

            inline void start() { QueryPerformanceCounter(&_begin); }

            inline double stop() {
                QueryPerformanceCounter(&_end);
                //return seconds passed
                return (static_cast<double>(_end.QuadPart - _begin.QuadPart) / _freq.QuadPart);
            }

            inline double stamp() {
                QueryPerformanceCounter(&_stamp);
                //return in seconds
                return (static_cast<double>(_stamp.QuadPart) / _freq.QuadPart);
            }
        };
    }
}
#else
#include <sys/time.h>

namespace OpenSkyNet {
    namespace Utils {
        class PrecisionTimer {
            timeval _begin, _end, _stamp;
        public:
            inline void start() { gettimeofday(&_begin, 0); }

            inline double stop() {
                gettimeofday(&_end, 0);
                //return seconds passed
                double t1 = static_cast<double>(_begin.tv_sec + static_cast<double>(_begin.tv_usec)/(1000000));
                double t2 = static_cast<double>(_end.tv_sec + static_cast<double>(_end.tv_usec)/(1000000));
                return t2 - t1;
            }

            inline double stamp() {
                gettimeofday(&_stamp, 0);
                //return in seconds
                return static_cast<double>(_stamp.tv_sec + static_cast<double>(_stamp.tv_usec)/(1000000));
            }
        };
    }
}
#endif

#endif //UPRECISION_TIMER_H