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1 | // |
2 | // is_write_buffered.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
f51cf556 | 5 | // Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
7c673cae FG |
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_WRITE_BUFFERED_HPP | |
12 | #define BOOST_ASIO_IS_WRITE_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_stream_fwd.hpp> | |
20 | #include <boost/asio/buffered_write_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_write_buffered_helper(buffered_stream<Stream>* s); | |
31 | ||
32 | template <typename Stream> | |
33 | char is_write_buffered_helper(buffered_write_stream<Stream>* s); | |
34 | ||
35 | struct is_write_buffered_big_type { char data[10]; }; | |
36 | is_write_buffered_big_type is_write_buffered_helper(...); | |
37 | ||
38 | } // namespace detail | |
39 | ||
40 | /// The is_write_buffered class is a traits class that may be used to determine | |
41 | /// whether a stream type supports buffering of written data. | |
42 | template <typename Stream> | |
43 | class is_write_buffered | |
44 | { | |
45 | public: | |
46 | #if defined(GENERATING_DOCUMENTATION) | |
47 | /// The value member is true only if the Stream type supports buffering of | |
48 | /// written data. | |
49 | static const bool value; | |
50 | #else | |
51 | BOOST_ASIO_STATIC_CONSTANT(bool, | |
52 | value = sizeof(detail::is_write_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_WRITE_BUFFERED_HPP |