/*****************************************************************************

        ClockCycleCounter.h
        Copyright (c) 2003 Laurent de Soras

Instrumentation class, for accurate time interval measurement. You may have
to modify the implementation to adapt it to your system and/or compiler.

--- Legal stuff ---

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

*Tab=3***********************************************************************/

#if ! defined (stopwatch_ClockCycleCounter_HEADER_INCLUDED)
#define stopwatch_ClockCycleCounter_HEADER_INCLUDED

#if defined (_MSC_VER)
        #pragma once
        #pragma warning (4 : 4250) // "Inherits via dominance."
#endif

/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

#include        "def.h"
#include        "Int64.h"

namespace stopwatch
{

class ClockCycleCounter
{

/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

public:

                                                ClockCycleCounter ();

        stopwatch_FORCEINLINE void
                                                start ();
        stopwatch_FORCEINLINE void
                                                stop_lap ();
        Int64                           get_time_total () const;
        Int64                           get_time_best_lap () const;

/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

protected:

/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

private:

        void                            compute_clk_mul ();
        void                            compute_measure_time_total ();
        void                            compute_measure_time_lap ();

        static void             spend_time ();
        static stopwatch_FORCEINLINE Int64
                                                read_clock_counter ();

        Int64                           _start_time;
        Int64                           _state;
        Int64                           _best_score;

        static Int64    _measure_time_total;
        static Int64    _measure_time_lap;
        static int              _clk_mul;
        static bool             _init_flag;

/*\\\ FORBIDDEN MEMBER FUNCTIONS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

private:

                                                ClockCycleCounter (const ClockCycleCounter &other);
        ClockCycleCounter &
                                                operator = (const ClockCycleCounter &other);
        bool                            operator == (const ClockCycleCounter &other);
        bool                            operator != (const ClockCycleCounter &other);

};      // class ClockCycleCounter

}       // namespace stopwatch

#include        "ClockCycleCounter.hpp"

#endif  // stopwatch_ClockCycleCounter_HEADER_INCLUDED

/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/