| 1 | // |
|---|
| 2 | // is_read_buffered.hpp |
|---|
| 3 | // ~~~~~~~~~~~~~~~~~~~~ |
|---|
| 4 | // |
|---|
| 5 | // Copyright (c) 2003-2024 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
|---|
| 6 | // |
|---|
| 7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
|---|
| 8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
|---|
| 9 | // |
|---|
| 10 | |
|---|
| 11 | #ifndef BOOST_ASIO_IS_READ_BUFFERED_HPP |
|---|
| 12 | #define BOOST_ASIO_IS_READ_BUFFERED_HPP |
|---|
| 13 | |
|---|
| 14 | #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
|---|
| 15 | # pragma once |
|---|
| 16 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
|---|
| 17 | |
|---|
| 18 | #include <boost/asio/detail/config.hpp> |
|---|
| 19 | #include <boost/asio/buffered_read_stream_fwd.hpp> |
|---|
| 20 | #include <boost/asio/buffered_stream_fwd.hpp> |
|---|
| 21 | |
|---|
| 22 | #include <boost/asio/detail/push_options.hpp> |
|---|
| 23 | |
|---|
| 24 | namespace boost { |
|---|
| 25 | namespace asio { |
|---|
| 26 | |
|---|
| 27 | namespace detail { |
|---|
| 28 | |
|---|
| 29 | template <typename Stream> |
|---|
| 30 | char is_read_buffered_helper(buffered_stream<Stream>* s); |
|---|
| 31 | |
|---|
| 32 | template <typename Stream> |
|---|
| 33 | char is_read_buffered_helper(buffered_read_stream<Stream>* s); |
|---|
| 34 | |
|---|
| 35 | struct is_read_buffered_big_type { char data[10]; }; |
|---|
| 36 | is_read_buffered_big_type is_read_buffered_helper(...); |
|---|
| 37 | |
|---|
| 38 | } // namespace detail |
|---|
| 39 | |
|---|
| 40 | /// The is_read_buffered class is a traits class that may be used to determine |
|---|
| 41 | /// whether a stream type supports buffering of read data. |
|---|
| 42 | template <typename Stream> |
|---|
| 43 | class is_read_buffered |
|---|
| 44 | { |
|---|
| 45 | public: |
|---|
| 46 | #if defined(GENERATING_DOCUMENTATION) |
|---|
| 47 | /// The value member is true only if the Stream type supports buffering of |
|---|
| 48 | /// read data. |
|---|
| 49 | static const bool value; |
|---|
| 50 | #else |
|---|
| 51 | BOOST_ASIO_STATIC_CONSTANT(bool, |
|---|
| 52 | value = sizeof(detail::is_read_buffered_helper((Stream*)0)) == 1); |
|---|
| 53 | #endif |
|---|
| 54 | }; |
|---|
| 55 | |
|---|
| 56 | } // namespace asio |
|---|
| 57 | } // namespace boost |
|---|
| 58 | |
|---|
| 59 | #include <boost/asio/detail/pop_options.hpp> |
|---|
| 60 | |
|---|
| 61 | #endif // BOOST_ASIO_IS_READ_BUFFERED_HPP |
|---|
| 62 | |
|---|
