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00001 // 00002 // time_traits.hpp 00003 // ~~~~~~~~~~~~~~~ 00004 // 00005 // Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com) 00006 // 00007 // Distributed under the Boost Software License, Version 1.0. (See accompanying 00008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 00009 // 00010 00011 #ifndef ASIO_TIME_TRAITS_HPP 00012 #define ASIO_TIME_TRAITS_HPP 00013 00014 #if defined(_MSC_VER) && (_MSC_VER >= 1200) 00015 # pragma once 00016 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) 00017 00018 #include "asio/detail/push_options.hpp" 00019 00020 #include "asio/detail/socket_types.hpp" // Must come before posix_time. 00021 00022 #include "asio/detail/push_options.hpp" 00023 #include <boost/date_time/posix_time/posix_time_types.hpp> 00024 #include "asio/detail/pop_options.hpp" 00025 00026 namespace asio { 00027 00029 template <typename Time> 00030 struct time_traits; 00031 00033 template <> 00034 struct time_traits<boost::posix_time::ptime> 00035 { 00037 typedef boost::posix_time::ptime time_type; 00038 00040 typedef boost::posix_time::time_duration duration_type; 00041 00043 static time_type now() 00044 { 00045 return boost::posix_time::microsec_clock::universal_time(); 00046 } 00047 00049 static time_type add(const time_type& t, const duration_type& d) 00050 { 00051 return t + d; 00052 } 00053 00055 static duration_type subtract(const time_type& t1, const time_type& t2) 00056 { 00057 return t1 - t2; 00058 } 00059 00061 static bool less_than(const time_type& t1, const time_type& t2) 00062 { 00063 return t1 < t2; 00064 } 00065 00067 static boost::posix_time::time_duration to_posix_duration( 00068 const duration_type& d) 00069 { 00070 return d; 00071 } 00072 }; 00073 00074 } // namespace asio 00075 00076 #include "asio/detail/pop_options.hpp" 00077 00078 #endif // ASIO_TIME_TRAITS_HPP