| // |
| // is_write_buffered.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2020 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_IS_WRITE_BUFFERED_HPP |
| #define ASIO_IS_WRITE_BUFFERED_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #include "asio/buffered_stream_fwd.hpp" |
| #include "asio/buffered_write_stream_fwd.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| |
| namespace detail { |
| |
| template <typename Stream> |
| char is_write_buffered_helper(buffered_stream<Stream>* s); |
| |
| template <typename Stream> |
| char is_write_buffered_helper(buffered_write_stream<Stream>* s); |
| |
| struct is_write_buffered_big_type { char data[10]; }; |
| is_write_buffered_big_type is_write_buffered_helper(...); |
| |
| } // namespace detail |
| |
| /// The is_write_buffered class is a traits class that may be used to determine |
| /// whether a stream type supports buffering of written data. |
| template <typename Stream> |
| class is_write_buffered |
| { |
| public: |
| #if defined(GENERATING_DOCUMENTATION) |
| /// The value member is true only if the Stream type supports buffering of |
| /// written data. |
| static const bool value; |
| #else |
| ASIO_STATIC_CONSTANT(bool, |
| value = sizeof(detail::is_write_buffered_helper((Stream*)0)) == 1); |
| #endif |
| }; |
| |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // ASIO_IS_WRITE_BUFFERED_HPP |