Chris@16: // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
Chris@16: // (C) Copyright 2003-2007 Jonathan Turkanis
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
Chris@16: 
Chris@16: // See http://www.boost.org/libs/iostreams for documentation.
Chris@16: 
Chris@16: #ifndef BOOST_IOSTREAMS_OPTIMAL_BUFFER_SIZE_HPP_INCLUDED
Chris@16: #define BOOST_IOSTREAMS_OPTIMAL_BUFFER_SIZE_HPP_INCLUDED
Chris@16: 
Chris@16: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
Chris@16: # pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/config.hpp>  // DEDUCED_TYPENAME, MSVC.
Chris@16: #include <boost/detail/workaround.hpp>
Chris@16: #include <boost/iostreams/constants.hpp>  // constants.
Chris@16: #include <boost/iostreams/detail/dispatch.hpp>
Chris@16: #include <boost/iostreams/detail/wrap_unwrap.hpp>
Chris@16: #include <boost/iostreams/operations_fwd.hpp>
Chris@16: #include <boost/mpl/if.hpp>
Chris@16: 
Chris@16: // Must come last.
Chris@16: #include <boost/iostreams/detail/config/disable_warnings.hpp>
Chris@16: 
Chris@16: namespace boost { namespace iostreams {
Chris@16: 
Chris@16: namespace detail {
Chris@16: 
Chris@16: template<typename T>
Chris@16: struct optimal_buffer_size_impl;
Chris@16: 
Chris@16: } // End namespace detail.
Chris@16: 
Chris@16: template<typename T>
Chris@16: std::streamsize optimal_buffer_size(const T& t)
Chris@16: {
Chris@16:     typedef detail::optimal_buffer_size_impl<T> impl;
Chris@16:     return impl::optimal_buffer_size(detail::unwrap(t));
Chris@16: }
Chris@16: 
Chris@16: namespace detail {
Chris@16: 
Chris@16: //------------------Definition of optimal_buffer_size_impl--------------------//
Chris@16: 
Chris@16: template<typename T>
Chris@16: struct optimal_buffer_size_impl
Chris@16:     : mpl::if_<
Chris@16:           is_custom<T>,
Chris@16:           operations<T>,
Chris@16:           optimal_buffer_size_impl<
Chris@16:               BOOST_DEDUCED_TYPENAME
Chris@16:               dispatch<
Chris@16:                   T, optimally_buffered_tag, device_tag, filter_tag
Chris@16:               >::type
Chris@16:           >
Chris@16:       >::type
Chris@16:     { };
Chris@16: 
Chris@16: template<>
Chris@16: struct optimal_buffer_size_impl<optimally_buffered_tag> {
Chris@16:     template<typename T>
Chris@16:     static std::streamsize optimal_buffer_size(const T& t)
Chris@16:     { return t.optimal_buffer_size(); }
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct optimal_buffer_size_impl<device_tag> {
Chris@16:     template<typename T>
Chris@16:     static std::streamsize optimal_buffer_size(const T&)
Chris@16:     { return default_device_buffer_size; }
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct optimal_buffer_size_impl<filter_tag> {
Chris@16:     template<typename T>
Chris@16:     static std::streamsize optimal_buffer_size(const T&)
Chris@16:     { return default_filter_buffer_size; }
Chris@16: };
Chris@16: 
Chris@16: } // End namespace detail.
Chris@16: 
Chris@16: } } // End namespaces iostreams, boost.
Chris@16: 
Chris@16: #include <boost/iostreams/detail/config/enable_warnings.hpp>
Chris@16: 
Chris@16: #endif // #ifndef BOOST_IOSTREAMS_OPTIMAL_BUFFER_SIZE_HPP_INCLUDED