1//
2// time_traits.hpp
3// ~~~~~~~~~~~~~~~
4//
5// Copyright (c) 2003-2024 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
27namespace boost {
28namespace asio {
29
30/// Time traits suitable for use with the deadline timer.
31template <typename Time>
32struct time_traits;
33
34/// Time traits specialised for posix_time.
35template <>
36struct 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
89

source code of boost/libs/asio/include/boost/asio/time_traits.hpp