synaps/base/Clock.h

/********************************************************************
 *   This file is part of the source code of the SYNAPS kernel.
 *   Author(s): B. Mourrain, GALAAD, INRIA
 *   $Id: Clock.h,v 1.1 2005/07/11 11:23:11 mourrain Exp $
 ********************************************************************/
#ifndef SYNAPS_UTIL_CLOCK_H
#define SYNAPS_UTIL_CLOCK_H
/********************************************************************/


#include <ctime>
#include <synaps/init.h>

__BEGIN_NAMESPACE_SYNAPS

class Clock
{
        public:

                // Construct and start clock immediately.
                //
                Clock() : start_(clock()), running(true) {};

                ~Clock() {};

                // Start clock; same effect as constructor.
                //
                void start()
                {
                        start_ = clock();
                        running = true;
                }

                // Time returned by time() is from start of clock
                // until the call of this function.
                //
                void stop()
                {
                        stop_ = clock();
                        running = false;
                }

                // Return elapsed CPU time from start of clock until the call
                // of stop(), or the current value if clock is running.
                //
                double time()
                {
                        if (running)
                                return double(clock() - start_) / CLOCKS_PER_SEC;
                        else
                                return double(stop_ - start_) / CLOCKS_PER_SEC;
                }

        private:
                clock_t start_;
                clock_t stop_;
                bool running;
};

__END_NAMESPACE_SYNAPS

#endif  // SYNAPS_UTIL_CLOCK_H