system/CTicTac.h

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2018, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */
#pragma once
 
namespace mrpt
{
namespace system
{
/** A high-performance stopwatch, with typical resolution of nanoseconds.
 *  \note The class is named after the Spanish equivalent of "Tic-Toc" ;-)
 * \ingroup mrpt_system_grp
 */
class CTicTac
{
   public:
        /** Default constructor. Implicitly calls Tic() */
        CTicTac() noexcept;
        CTicTac(const CTicTac&) = delete;
        CTicTac& operator=(const CTicTac&) = delete;
        /** Starts the stopwatch. \sa Tac() */
        void Tic() noexcept;
        /** Stops the stopwatch.  \return Returns the ellapsed time in seconds.
         * \sa Tic() */
        double Tac() noexcept;
 
   private:
        alignas(16) unsigned long largeInts[4];
};  // End of class def.
 
}  // namespace system
}  // namespace mrpt