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61 lines
1.6 KiB
61 lines
1.6 KiB
// |
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// is_write_buffered.hpp |
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// ~~~~~~~~~~~~~~~~~~~~~ |
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// |
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// Copyright (c) 2003-2011 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 BOOST_ASIO_IS_WRITE_BUFFERED_HPP |
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#define BOOST_ASIO_IS_WRITE_BUFFERED_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 <boost/asio/detail/config.hpp> |
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#include <boost/asio/buffered_stream_fwd.hpp> |
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#include <boost/asio/buffered_write_stream_fwd.hpp> |
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#include <boost/asio/detail/push_options.hpp> |
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namespace boost { |
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namespace asio { |
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namespace detail { |
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template <typename Stream> |
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char is_write_buffered_helper(buffered_stream<Stream>* s); |
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template <typename Stream> |
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char is_write_buffered_helper(buffered_write_stream<Stream>* s); |
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struct is_write_buffered_big_type { char data[10]; }; |
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is_write_buffered_big_type is_write_buffered_helper(...); |
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} // namespace detail |
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/// The is_write_buffered class is a traits class that may be used to determine |
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/// whether a stream type supports buffering of written data. |
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template <typename Stream> |
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class is_write_buffered |
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{ |
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public: |
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#if defined(GENERATING_DOCUMENTATION) |
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/// The value member is true only if the Stream type supports buffering of |
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/// written data. |
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static const bool value; |
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#else |
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BOOST_STATIC_CONSTANT(bool, |
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value = sizeof(detail::is_write_buffered_helper((Stream*)0)) == 1); |
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#endif |
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}; |
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} // namespace asio |
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} // namespace boost |
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#include <boost/asio/detail/pop_options.hpp> |
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#endif // BOOST_ASIO_IS_WRITE_BUFFERED_HPP
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