1 | //
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2 | // monotone_timer.hpp
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3 | // ~~~~~~~~~~~~~~~~~~
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4 | //
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5 | // Copyright (c) 2009
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6 | //
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7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying
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8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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9 | //
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10 |
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11 | #ifndef BOOST_ASIO_MONOTONE_TIMER_HPP
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12 | #define BOOST_ASIO_MONOTONE_TIMER_HPP
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13 |
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14 | #if defined(_MSC_VER) && (_MSC_VER >= 1200)
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15 | # pragma once
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16 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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17 | #include <boost/asio/detail/push_options.hpp>
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18 |
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19 | #include <boost/asio/detail/socket_types.hpp> // Must come before posix_time.
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20 | #include <boost/asio/detail/push_options.hpp>
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21 | #include <boost/date_time/posix_time/posix_time_types.hpp>
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22 | #include <boost/asio/detail/pop_options.hpp>
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23 |
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24 | #include <boost/asio/basic_deadline_timer.hpp>
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25 |
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26 | #include <boost/thread/mutex.hpp>
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27 | #include <boost/thread/locks.hpp>
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28 |
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29 |
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30 | namespace boost
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31 | {
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32 | namespace asio
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33 | {
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34 |
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35 | namespace monotone_time
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36 | {
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37 |
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38 | class mtime
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39 | {
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40 | public:
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41 | mtime() {}
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42 | explicit mtime(const boost::posix_time::time_duration &d) : m(d){}
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43 | boost::posix_time::time_duration m;
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44 | mtime operator+(const boost::posix_time::time_duration &d) const { return mtime(m + d); }
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45 | mtime operator-(const boost::posix_time::time_duration &d) const { return mtime(m - d); }
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46 | boost::posix_time::time_duration operator-(const mtime &t) const { return m - t.m; }
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47 | };
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48 |
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49 | } // namespace monotone_time
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50 |
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51 |
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52 | /// Time traits specialized for monotone_time
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53 | template <>
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54 | struct time_traits<monotone_time::mtime>
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55 | {
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56 | /// The time type.
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57 | typedef boost::asio::monotone_time::mtime time_type;
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58 |
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59 | /// The duration type.
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60 | typedef boost::posix_time::time_duration duration_type;
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61 |
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62 | /// Get the current time.
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63 | static time_type now()
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64 | {
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65 | #if defined(_POSIX_TIMERS) && ( _POSIX_TIMERS > 0 ) && defined(_POSIX_MONOTONIC_CLOCK)
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66 | struct timespec ts;
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67 | clock_gettime(CLOCK_MONOTONIC, &ts);
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68 | #if defined(BOOST_DATE_TIME_HAS_NANOSECONDS)
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69 | return time_type(boost::posix_time::seconds(ts.tv_sec) +boost::posix_time::nanosec(ts.tv_nsec));
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70 | #else
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71 | return time_type(boost::posix_time::seconds(ts.tv_sec) +boost::posix_time::microsec(ts.tv_nsec / 1000));
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72 | #endif
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73 | #elif defined(BOOST_WINDOWS)
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74 | static LARGE_INTEGER c;
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75 | static boost::mutex mx;
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76 | boost::lock_guard<boost::mutex> lock(mx);
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77 | uint32_t n = GetTickCount();
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78 | if (n < (c.LowPart)) c.HighPart++;
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79 | c.LowPart = n;
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80 | return time_type(boost::posix_time::millisec(c.QuadPart));
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81 | #endif
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82 | }
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83 |
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84 | /// Add a duration to a time.
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85 | static time_type add(const time_type& t, const duration_type& d)
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86 | {
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87 | return t + d;
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88 | }
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89 |
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90 | /// Subtract one time from another.
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91 | static duration_type subtract(const time_type& t1, const time_type& t2)
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92 | {
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93 | return t1.m - t2.m;
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94 | }
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95 |
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96 | /// Test whether one time is less than another.
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97 | static bool less_than(const time_type& t1, const time_type& t2)
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98 | {
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99 | return t1.m < t2.m;
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100 | }
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101 |
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102 | /// Convert to POSIX duration type.
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103 | static boost::posix_time::time_duration to_posix_duration(
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104 | const duration_type& d)
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105 | {
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106 | return d;
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107 | }
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108 | };
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109 |
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110 | /// Typedef for the typical usage of timer.
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111 | typedef boost::asio::basic_deadline_timer<boost::asio::monotone_time::mtime> monotone_timer;
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112 |
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113 | } // namespace asio
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114 | } // namespace boost
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115 |
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116 | #include <boost/asio/detail/pop_options.hpp>
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117 |
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118 |
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119 |
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120 | #endif // BOOST_ASIO_MONOTONE_TIMER_HPP
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