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- //
- // wait_traits.hpp
- // ~~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 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_WAIT_TRAITS_HPP
- #define ASIO_WAIT_TRAITS_HPP
-
- #if defined(_MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
- #include "asio/detail/push_options.hpp"
-
- namespace asio {
-
- /// Wait traits suitable for use with the basic_waitable_timer class template.
- template <typename Clock>
- struct wait_traits
- {
- /// Convert a clock duration into a duration used for waiting.
- /**
- * @returns @c d.
- */
- static typename Clock::duration to_wait_duration(
- const typename Clock::duration& d)
- {
- return d;
- }
-
- /// Convert a clock duration into a duration used for waiting.
- /**
- * @returns @c d.
- */
- static typename Clock::duration to_wait_duration(
- const typename Clock::time_point& t)
- {
- typename Clock::time_point now = Clock::now();
- if (now + (Clock::duration::max)() < t)
- return (Clock::duration::max)();
- if (now + (Clock::duration::min)() > t)
- return (Clock::duration::min)();
- return t - now;
- }
- };
-
- } // namespace asio
-
- #include "asio/detail/pop_options.hpp"
-
- #endif // ASIO_WAIT_TRAITS_HPP
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