/*
 * Copyright 2016, Intel Corporation
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *
 *     * Neither the name of the copyright holder nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * conversions.hpp -- commonly used conversions
 */

#ifndef PMEMOBJ_CONVERSIONS_HPP
#define PMEMOBJ_CONVERSIONS_HPP

#include <chrono>
#include <time.h>

namespace nvml {

namespace detail {

	/**
	 * Convert std::chrono::time_point to posix timespec.
	 *
	 * @param[in] timepoint point in time to be converted.
	 *
	 * @return converted timespec structure.
	 */
	template<typename Clock, typename Duration = typename Clock::duration>
	struct timespec timepoint_to_timespec(
			const std::chrono::time_point<Clock,
			Duration> &timepoint)
	{
		struct timespec ts;
		auto rel_duration = timepoint.time_since_epoch();
		const auto sec =
			std::chrono::duration_cast
			<std::chrono::seconds>(rel_duration);

		ts.tv_sec = sec.count();
		ts.tv_nsec = std::chrono::duration_cast
				<std::chrono::nanoseconds>
				(rel_duration - sec).count();

		return ts;
	}

}  /* namespace detail */

}  /* namespace nvml */

#endif /* PMEMOBJ_CONVERSIONS_HPP */
