Swiftdiff options
Diffstat (limited to '3rdParty/Boost/src/boost/asio/detail/chrono_time_traits.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/asio/detail/chrono_time_traits.hpp | 85 |
1 files changed, 74 insertions, 11 deletions
diff --git a/3rdParty/Boost/src/boost/asio/detail/chrono_time_traits.hpp b/3rdParty/Boost/src/boost/asio/detail/chrono_time_traits.hpp index e56c8c3..6b81e5d 100644 --- a/3rdParty/Boost/src/boost/asio/detail/chrono_time_traits.hpp +++ b/3rdParty/Boost/src/boost/asio/detail/chrono_time_traits.hpp @@ -2,7 +2,7 @@ // detail/chrono_time_traits.hpp // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // -// Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com) +// Copyright (c) 2003-2014 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) @@ -15,7 +15,7 @@ # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) -#include <boost/cstdint.hpp> +#include <boost/asio/detail/cstdint.hpp> #include <boost/asio/detail/push_options.hpp> @@ -23,6 +23,13 @@ namespace boost { 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 @@ -48,13 +55,63 @@ struct chrono_time_traits // 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) { - return t1 - 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. @@ -73,32 +130,38 @@ struct chrono_time_traits { } - boost::int64_t ticks() const + int64_t ticks() const { return d_.count(); } - boost::int64_t total_seconds() const + int64_t total_seconds() const { return duration_cast<1, 1>(); } - boost::int64_t total_milliseconds() const + int64_t total_milliseconds() const { return duration_cast<1, 1000>(); } - boost::int64_t total_microseconds() const + int64_t total_microseconds() const { return duration_cast<1, 1000000>(); } private: - template <boost::int64_t Num, boost::int64_t Den> - boost::int64_t duration_cast() const + template <int64_t Num, int64_t Den> + int64_t duration_cast() const { - const boost::int64_t num = period_type::num * Den; - const boost::int64_t den = period_type::den * Num; + 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(); |