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/*
* Copyright Andrey Semashev 2013.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*/
/*!
* \file support/std_chrono.hpp
*
* \brief This header enables support for std::chrono time units.
*/
#ifndef BOOST_SYNC_SUPPORT_STD_CHRONO_HPP_INCLUDED_
#define BOOST_SYNC_SUPPORT_STD_CHRONO_HPP_INCLUDED_
#include <ratio>
#include <chrono>
#include <boost/sync/detail/config.hpp>
#include <boost/sync/detail/time_traits.hpp>
#include <boost/sync/detail/time_units.hpp>
#include <boost/sync/detail/header.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
namespace boost {
namespace sync {
namespace detail {
template< typename Rep, typename Period >
struct time_traits< std::chrono::duration< Rep, Period > >
{
typedef time_duration_tag tag;
typedef system_duration unit_type;
static BOOST_CONSTEXPR_OR_CONST bool is_specialized = true;
static system_duration to_sync_unit(std::chrono::duration< Rep, Period > const& dur) BOOST_NOEXCEPT
{
typedef std::chrono::duration< system_duration::native_type, std::ratio< 1, system_duration::subsecond_fraction > > system_chrono_duration;
return system_duration(std::chrono::duration_cast< system_chrono_duration >(dur).count());
}
};
template< typename Clock, typename Duration >
struct time_traits< std::chrono::time_point< Clock, Duration > >
{
typedef time_point_tag tag;
typedef chrono_time_point< std::chrono::time_point< Clock, Duration > > unit_type;
static BOOST_CONSTEXPR_OR_CONST bool is_specialized = true;
static unit_type to_sync_unit(std::chrono::time_point< Clock, Duration > const& point) BOOST_NOEXCEPT
{
return unit_type(point);
}
};
template< typename Duration >
struct time_traits< std::chrono::time_point< std::chrono::system_clock, Duration > >
{
typedef time_point_tag tag;
typedef system_time_point unit_type;
static BOOST_CONSTEXPR_OR_CONST bool is_specialized = true;
static system_time_point to_sync_unit(std::chrono::time_point< std::chrono::system_clock, Duration > const& point) BOOST_NOEXCEPT
{
typedef std::chrono::time_point< std::chrono::system_clock, Duration > time_point;
typedef typename time_point::duration duration;
return system_time_point(time_traits< duration >::to_sync_unit(point.time_since_epoch()
#if defined(BOOST_SYNC_DETAIL_STD_CHRONO_TIME_T_MISMATCH)
// Make sure system_clock times start at 1st January 1970
+ std::chrono::seconds(std::chrono::system_clock::to_time_t(time_point()))
#endif
));
}
};
} // namespace detail
} // namespace sync
} // namespace boost
#include <boost/sync/detail/footer.hpp>
#endif // BOOST_SYNC_SUPPORT_STD_CHRONO_HPP_INCLUDED_
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