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Diffstat (limited to 'lib/asio/detail/chrono_time_traits.hpp')
-rw-r--r-- | lib/asio/detail/chrono_time_traits.hpp | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/lib/asio/detail/chrono_time_traits.hpp b/lib/asio/detail/chrono_time_traits.hpp deleted file mode 100644 index d1528f7..0000000 --- a/lib/asio/detail/chrono_time_traits.hpp +++ /dev/null @@ -1,190 +0,0 @@ -// -// detail/chrono_time_traits.hpp -// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -// -// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com) -// -// Distributed under the Boost Software License, Version 1.0. (See accompanying -// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -// - -#ifndef ASIO_DETAIL_CHRONO_TIME_TRAITS_HPP -#define ASIO_DETAIL_CHRONO_TIME_TRAITS_HPP - -#if defined(_MSC_VER) && (_MSC_VER >= 1200) -# pragma once -#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) - -#include "asio/detail/cstdint.hpp" - -#include "asio/detail/push_options.hpp" - -namespace asio { -namespace detail { - -// Helper template to compute the greatest common divisor. -template <int64_t v1, int64_t v2> -struct gcd { enum { value = gcd<v2, v1 % v2>::value }; }; - -template <int64_t v1> -struct gcd<v1, 0> { enum { value = v1 }; }; - -// Adapts std::chrono clocks for use with a deadline timer. -template <typename Clock, typename WaitTraits> -struct chrono_time_traits -{ - // The clock type. - typedef Clock clock_type; - - // The duration type of the clock. - typedef typename clock_type::duration duration_type; - - // The time point type of the clock. - typedef typename clock_type::time_point time_type; - - // The period of the clock. - typedef typename duration_type::period period_type; - - // Get the current time. - static time_type now() - { - return clock_type::now(); - } - - // Add a duration to a time. - static time_type add(const time_type& t, const duration_type& d) - { - const time_type epoch; - if (t >= epoch) - { - if ((time_type::max)() - t < d) - return (time_type::max)(); - } - else // t < epoch - { - if (-(t - (time_type::min)()) > d) - return (time_type::min)(); - } - - return t + d; - } - - // Subtract one time from another. - static duration_type subtract(const time_type& t1, const time_type& t2) - { - const time_type epoch; - if (t1 >= epoch) - { - if (t2 >= epoch) - { - return t1 - t2; - } - else if (t2 == (time_type::min)()) - { - return (duration_type::max)(); - } - else if ((time_type::max)() - t1 < epoch - t2) - { - return (duration_type::max)(); - } - else - { - return t1 - t2; - } - } - else // t1 < epoch - { - if (t2 < epoch) - { - return t1 - t2; - } - else if (t1 == (time_type::min)()) - { - return (duration_type::min)(); - } - else if ((time_type::max)() - t2 < epoch - t1) - { - return (duration_type::min)(); - } - else - { - return -(t2 - t1); - } - } - } - - // Test whether one time is less than another. - static bool less_than(const time_type& t1, const time_type& t2) - { - return t1 < t2; - } - - // Implement just enough of the posix_time::time_duration interface to supply - // what the timer_queue requires. - class posix_time_duration - { - public: - explicit posix_time_duration(const duration_type& d) - : d_(d) - { - } - - int64_t ticks() const - { - return d_.count(); - } - - int64_t total_seconds() const - { - return duration_cast<1, 1>(); - } - - int64_t total_milliseconds() const - { - return duration_cast<1, 1000>(); - } - - int64_t total_microseconds() const - { - return duration_cast<1, 1000000>(); - } - - private: - template <int64_t Num, int64_t Den> - int64_t duration_cast() const - { - const int64_t num1 = period_type::num / gcd<period_type::num, Num>::value; - const int64_t num2 = Num / gcd<period_type::num, Num>::value; - - const int64_t den1 = period_type::den / gcd<period_type::den, Den>::value; - const int64_t den2 = Den / gcd<period_type::den, Den>::value; - - const int64_t num = num1 * den2; - const int64_t den = num2 * den1; - - if (num == 1 && den == 1) - return ticks(); - else if (num != 1 && den == 1) - return ticks() * num; - else if (num == 1 && period_type::den != 1) - return ticks() / den; - else - return ticks() * num / den; - } - - duration_type d_; - }; - - // Convert to POSIX duration type. - static posix_time_duration to_posix_duration(const duration_type& d) - { - return posix_time_duration(WaitTraits::to_wait_duration(d)); - } -}; - -} // namespace detail -} // namespace asio - -#include "asio/detail/pop_options.hpp" - -#endif // ASIO_DETAIL_CHRONO_TIME_TRAITS_HPP |