ceph/src/boost/libs/asio/include/boost/asio/time_traits.hpp

   1 //
   2 // time_traits.hpp
   3 // ~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_TIME_TRAITS_HPP
  12 #define BOOST_ASIO_TIME_TRAITS_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/socket_types.hpp> // Must come before posix_time.
  19
  20 #if defined(BOOST_ASIO_HAS_BOOST_DATE_TIME) \
  21   || defined(GENERATING_DOCUMENTATION)
  22
  23 #include <boost/date_time/posix_time/posix_time_types.hpp>
  24
  25 #include <boost/asio/detail/push_options.hpp>
  26
  27 namespace boost {
  28 namespace asio {
  29
  30 /// Time traits suitable for use with the deadline timer.
  31 template <typename Time>
  32 struct time_traits;
  33
  34 /// Time traits specialised for posix_time.
  35 template <>
  36 struct time_traits<boost::posix_time::ptime>
  37 {
  38   /// The time type.
  39   typedef boost::posix_time::ptime time_type;
  40
  41   /// The duration type.
  42   typedef boost::posix_time::time_duration duration_type;
  43
  44   /// Get the current time.
  45   static time_type now()
  46   {
  47 #if defined(BOOST_DATE_TIME_HAS_HIGH_PRECISION_CLOCK)
  48     return boost::posix_time::microsec_clock::universal_time();
  49 #else // defined(BOOST_DATE_TIME_HAS_HIGH_PRECISION_CLOCK)
  50     return boost::posix_time::second_clock::universal_time();
  51 #endif // defined(BOOST_DATE_TIME_HAS_HIGH_PRECISION_CLOCK)
  52   }
  53
  54   /// Add a duration to a time.
  55   static time_type add(const time_type& t, const duration_type& d)
  56   {
  57     return t + d;
  58   }
  59
  60   /// Subtract one time from another.
  61   static duration_type subtract(const time_type& t1, const time_type& t2)
  62   {
  63     return t1 - t2;
  64   }
  65
  66   /// Test whether one time is less than another.
  67   static bool less_than(const time_type& t1, const time_type& t2)
  68   {
  69     return t1 < t2;
  70   }
  71
  72   /// Convert to POSIX duration type.
  73   static boost::posix_time::time_duration to_posix_duration(
  74       const duration_type& d)
  75   {
  76     return d;
  77   }
  78 };
  79
  80 } // namespace asio
  81 } // namespace boost
  82
  83 #include <boost/asio/detail/pop_options.hpp>
  84
  85 #endif // defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
  86        // || defined(GENERATING_DOCUMENTATION)
  87
  88 #endif // BOOST_ASIO_TIME_TRAITS_HPP