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							- //
 - // time_traits.hpp
 - // ~~~~~~~~~~~~~~~
 - //
 - // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
 - //
 - // 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)
 - //
 - 
 - #ifndef ASIO_TIME_TRAITS_HPP
 - #define ASIO_TIME_TRAITS_HPP
 - 
 - #if defined(_MSC_VER) && (_MSC_VER >= 1200)
 - # pragma once
 - #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
 - 
 - #include "asio/detail/socket_types.hpp" // Must come before posix_time.
 - 
 - #if defined(ASIO_HAS_BOOST_DATE_TIME) \
 -   || defined(GENERATING_DOCUMENTATION)
 - 
 - #include <boost/date_time/posix_time/posix_time_types.hpp>
 - 
 - #include "asio/detail/push_options.hpp"
 - 
 - namespace asio {
 - 
 - /// Time traits suitable for use with the deadline timer.
 - template <typename Time>
 - struct time_traits;
 - 
 - /// Time traits specialised for posix_time.
 - template <>
 - struct time_traits<boost::posix_time::ptime>
 - {
 -   /// The time type.
 -   typedef boost::posix_time::ptime time_type;
 - 
 -   /// The duration type.
 -   typedef boost::posix_time::time_duration duration_type;
 - 
 -   /// Get the current time.
 -   static time_type now()
 -   {
 - #if defined(BOOST_DATE_TIME_HAS_HIGH_PRECISION_CLOCK)
 -     return boost::posix_time::microsec_clock::universal_time();
 - #else // defined(BOOST_DATE_TIME_HAS_HIGH_PRECISION_CLOCK)
 -     return boost::posix_time::second_clock::universal_time();
 - #endif // defined(BOOST_DATE_TIME_HAS_HIGH_PRECISION_CLOCK)
 -   }
 - 
 -   /// Add a duration to a time.
 -   static time_type add(const time_type& t, const duration_type& d)
 -   {
 -     return t + d;
 -   }
 - 
 -   /// Subtract one time from another.
 -   static duration_type subtract(const time_type& t1, const time_type& t2)
 -   {
 -     return t1 - t2;
 -   }
 - 
 -   /// Test whether one time is less than another.
 -   static bool less_than(const time_type& t1, const time_type& t2)
 -   {
 -     return t1 < t2;
 -   }
 - 
 -   /// Convert to POSIX duration type.
 -   static boost::posix_time::time_duration to_posix_duration(
 -       const duration_type& d)
 -   {
 -     return d;
 -   }
 - };
 - 
 - } // namespace asio
 - 
 - #include "asio/detail/pop_options.hpp"
 - 
 - #endif // defined(ASIO_HAS_BOOST_DATE_TIME)
 -        // || defined(GENERATING_DOCUMENTATION)
 - 
 - #endif // ASIO_TIME_TRAITS_HPP
 
 
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