60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
//
|
|
// is_write_buffered.hpp
|
|
// ~~~~~~~~~~~~~~~~~~~~~
|
|
//
|
|
// Copyright (c) 2003-2023 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
|