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- //////////////////////////////////////////////////////////////////////////////
- //
- // (C) Copyright Ion Gaztanaga 2005-2012. 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)
- //
- // See http://www.boost.org/libs/interprocess for documentation.
- //
- //////////////////////////////////////////////////////////////////////////////
- #ifndef BOOST_INTERPROCESS_DETAIL_TIMEPOINT_TO_TIMESPEC_HPP
- #define BOOST_INTERPROCESS_DETAIL_TIMEPOINT_TO_TIMESPEC_HPP
- #ifndef BOOST_CONFIG_HPP
- # include <boost/config.hpp>
- #endif
- #
- #if defined(BOOST_HAS_PRAGMA_ONCE)
- # pragma once
- #endif
- #include <boost/interprocess/detail/mpl.hpp>
- #include <boost/interprocess/detail/type_traits.hpp>
- #include <boost/interprocess/detail/timed_utils.hpp>
- namespace boost {
- namespace interprocess {
- namespace ipcdetail {
- template<class TimePoint>
- inline timespec timepoint_to_timespec ( const TimePoint &tm
- , typename enable_if_ptime<TimePoint>::type * = 0)
- {
- typedef typename TimePoint::date_type date_type;
- typedef typename TimePoint::time_duration_type time_duration_type;
- const TimePoint epoch(date_type(1970,1,1));
- //Avoid negative absolute times
- time_duration_type duration = (tm <= epoch) ? time_duration_type(epoch - epoch)
- : time_duration_type(tm - epoch);
- timespec ts;
- ts.tv_sec = static_cast<time_t>(duration.total_seconds());
- ts.tv_nsec = static_cast<long>(duration.total_nanoseconds() % 1000000000);
- return ts;
- }
- inline timespec timepoint_to_timespec (const ustime &tm)
- {
- timespec ts;
- ts.tv_sec = static_cast<time_t>(tm.get_microsecs()/1000000u);
- ts.tv_nsec = static_cast<long>((tm.get_microsecs()%1000000u)*1000u);
- return ts;
- }
- template<class TimePoint>
- inline timespec timepoint_to_timespec ( const TimePoint &tm
- , typename enable_if_time_point<TimePoint>::type * = 0)
- {
- typedef typename TimePoint::duration duration_t;
- duration_t d(tm.time_since_epoch());
- timespec ts;
- BOOST_IF_CONSTEXPR(duration_t::period::num == 1 && duration_t::period::den == 1000000000)
- {
- ts.tv_sec = static_cast<time_t>(d.count()/duration_t::period::den);
- ts.tv_nsec = static_cast<long>(d.count()%duration_t::period::den);
- }
- else
- {
- const double factor = double(duration_t::period::num)/double(duration_t::period::den);
- const double res = d.count()*factor;
- ts.tv_sec = static_cast<time_t>(res);
- ts.tv_nsec = static_cast<long>(res - double(ts.tv_sec));
- }
- return ts;
- }
- } //namespace ipcdetail {
- } //namespace interprocess {
- } //namespace boost {
- #endif //ifndef BOOST_INTERPROCESS_DETAIL_TIMEPOINT_TO_TIMESPEC_HPP
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