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56 lines
1.3 KiB
56 lines
1.3 KiB
// |
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// wait_traits.hpp |
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// ~~~~~~~~~~~~~~~ |
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// |
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// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See accompanying |
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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// |
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#ifndef ASIO_WAIT_TRAITS_HPP |
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#define ASIO_WAIT_TRAITS_HPP |
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#if defined(_MSC_VER) && (_MSC_VER >= 1200) |
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# pragma once |
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
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#include "asio/detail/push_options.hpp" |
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namespace asio { |
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/// Wait traits suitable for use with the basic_waitable_timer class template. |
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template <typename Clock> |
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struct wait_traits |
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{ |
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/// Convert a clock duration into a duration used for waiting. |
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/** |
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* @returns @c d. |
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*/ |
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static typename Clock::duration to_wait_duration( |
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const typename Clock::duration& d) |
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{ |
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return d; |
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} |
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/// Convert a clock duration into a duration used for waiting. |
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/** |
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* @returns @c d. |
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*/ |
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static typename Clock::duration to_wait_duration( |
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const typename Clock::time_point& t) |
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{ |
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typename Clock::time_point now = Clock::now(); |
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if (now + (Clock::duration::max)() < t) |
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return (Clock::duration::max)(); |
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if (now + (Clock::duration::min)() > t) |
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return (Clock::duration::min)(); |
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return t - now; |
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} |
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}; |
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} // namespace asio |
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#include "asio/detail/pop_options.hpp" |
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#endif // ASIO_WAIT_TRAITS_HPP
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