1 // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
2 // (C) Copyright 2003-2007 Jonathan Turkanis
3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
6 // See http://www.boost.org/libs/iostreams for documentation.
8 #ifndef BOOST_IOSTREAMS_OPTIMAL_BUFFER_SIZE_HPP_INCLUDED
9 #define BOOST_IOSTREAMS_OPTIMAL_BUFFER_SIZE_HPP_INCLUDED
15 #include <boost/config.hpp> // DEDUCED_TYPENAME, MSVC.
16 #include <boost/detail/workaround.hpp>
17 #include <boost/iostreams/constants.hpp> // constants.
18 #include <boost/iostreams/detail/dispatch.hpp>
19 #include <boost/iostreams/detail/wrap_unwrap.hpp>
20 #include <boost/iostreams/operations_fwd.hpp>
21 #include <boost/mpl/if.hpp>
24 #include <boost/iostreams/detail/config/disable_warnings.hpp>
26 namespace boost { namespace iostreams {
31 struct optimal_buffer_size_impl;
33 } // End namespace detail.
36 std::streamsize optimal_buffer_size(const T& t)
38 typedef detail::optimal_buffer_size_impl<T> impl;
39 return impl::optimal_buffer_size(detail::unwrap(t));
44 //------------------Definition of optimal_buffer_size_impl--------------------//
47 struct optimal_buffer_size_impl
51 optimal_buffer_size_impl<
52 BOOST_DEDUCED_TYPENAME
54 T, optimally_buffered_tag, device_tag, filter_tag
61 struct optimal_buffer_size_impl<optimally_buffered_tag> {
63 static std::streamsize optimal_buffer_size(const T& t)
64 { return t.optimal_buffer_size(); }
68 struct optimal_buffer_size_impl<device_tag> {
70 static std::streamsize optimal_buffer_size(const T&)
71 { return default_device_buffer_size; }
75 struct optimal_buffer_size_impl<filter_tag> {
77 static std::streamsize optimal_buffer_size(const T&)
78 { return default_filter_buffer_size; }
81 } // End namespace detail.
83 } } // End namespaces iostreams, boost.
85 #include <boost/iostreams/detail/config/enable_warnings.hpp>
87 #endif // #ifndef BOOST_IOSTREAMS_OPTIMAL_BUFFER_SIZE_HPP_INCLUDED