Timer.hpp

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// Copyright (c) 2011 Michael D. Adams
// All rights reserved.

// __START_OF_LICENSE__
// 
// Copyright (c) 2015 Michael D. Adams
// All rights reserved.
// 
// This file is part of the Signal Processing Library (SPL).
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 3,
// or (at your option) any later version.
// 
// This program 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 General Public License for more details.
// 
// You should have received a copy of the GNU General Public
// License along with this program; see the file LICENSE.  If not,
// see <http://www.gnu.org/licenses/>.
// 
// __END_OF_LICENSE__

#ifndef SPL_Timer_hpp
#define SPL_Timer_hpp

//

#include <SPL/config.hpp>
#include <iostream>
#include <cstdlib>
#if defined(SPL_HAVE_SYS_TIME_H)
#include <sys/time.h>
#endif

namespace SPL {

// Timer Class

class Timer
{
public:

        void start();

        void stop();

        double get() const;

private:
        // Do not look at private members.  Doing so will make your eyes bleed!
#if defined(SPL_HAVE_GETTIMEOFDAY)
        struct timeval startTime_;
        struct timeval stopTime_;
#endif
};

#if defined(SPL_HAVE_GETTIMEOFDAY)

inline void Timer::start()
{
        if (gettimeofday(&startTime_, 0)) {
                // The gettimeofday function has failed.
                // Ensure that the timer is initialized to some sane state.
                std::cerr << "warning: gettimeofday failed\n";
                startTime_.tv_sec = 0;
                startTime_.tv_usec = 0;
        }
}

inline void Timer::stop()
{
        if (gettimeofday(&stopTime_, 0)) {
                // The gettimeofday function has failed.
                // Ensure that the timer is initialized to some sane state.
                std::cerr << "warning: gettimeofday failed\n";
                stopTime_.tv_sec = 0;
                stopTime_.tv_usec = 0;
        }
}

inline double Timer::get() const
{
        double t0;
        double t1;
        t0 = ((double) startTime_.tv_sec) + ((double) startTime_.tv_usec) / 1e6;
        t1 = ((double) stopTime_.tv_sec) + ((double) stopTime_.tv_usec) / 1e6;
        return t1 - t0;
}

#endif

//

double getCurrentMemUsage();

double getPeakMemUsage();


}

#endif