/**
 * \file
 * \brief TickClock class header
 *
 * \author Copyright (C) 2014-2016 Kamil Szczygiel http://www.distortec.com http://www.freddiechopin.info
 *
 * \par License
 * This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not
 * distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#ifndef INCLUDE_DISTORTOS_TICKCLOCK_HPP_
#define INCLUDE_DISTORTOS_TICKCLOCK_HPP_

#include "distortos/distortosConfiguration.h"

#include <chrono>

namespace distortos
{

/**
 * \brief TickClock is a std::chrono clock, equivalent of std::chrono::steady_clock
 *
 * \ingroup clocks
 */

class TickClock
{
public:

	/// type of tick counter
	using rep = uint64_t;

	/// std::ratio type representing the tick period of the clock, seconds
	using period = std::ratio<1, CONFIG_TICK_FREQUENCY>;

	/// basic duration type of clock
	using duration = std::chrono::duration<rep, period>;

	/// basic time_point type of clock
	using time_point = std::chrono::time_point<TickClock>;

	/**
	 * \return time_point representing the current value of the clock
	 */

	static time_point now();

	/// this is a steady clock - it cannot be adjusted
	constexpr static bool is_steady {true};
};

}	// namespace distortos

#endif	// INCLUDE_DISTORTOS_TICKCLOCK_HPP_
