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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/posix_time.hpp
*
* \brief This header enables support for POSIX time units.
*/
#ifndef BOOST_SYNC_SUPPORT_POSIX_TIME_HPP_INCLUDED_
#define BOOST_SYNC_SUPPORT_POSIX_TIME_HPP_INCLUDED_
#include <time.h>
#include <boost/static_assert.hpp>
#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< >
struct time_traits< struct ::timespec >
{
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(struct ::timespec const& point)
{
enum
{
nanoseconds_fraction = 1000000000u,
conversion_ratio = system_time_point::subsecond_fraction >= nanoseconds_fraction ?
system_time_point::subsecond_fraction / nanoseconds_fraction :
nanoseconds_fraction / system_time_point::subsecond_fraction
};
return system_time_point(point.tv_sec, (system_time_point::subsecond_fraction < nanoseconds_fraction ? point.tv_nsec / conversion_ratio : point.tv_nsec * conversion_ratio));
}
};
} // namespace detail
} // namespace sync
} // namespace boost
#include <boost/sync/detail/footer.hpp>
#endif // BOOST_SYNC_SUPPORT_POSIX_TIME_HPP_INCLUDED_
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