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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 |