| Jeff Thompson | 86b6d64 | 2013-10-17 15:01:56 -0700 | [diff] [blame] | 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.) |
| 5 | |
| 6 | // See http://www.boost.org/libs/iostreams for documentation. |
| 7 | |
| 8 | #ifndef NDNBOOST_IOSTREAMS_OPTIMAL_BUFFER_SIZE_HPP_INCLUDED |
| 9 | #define NDNBOOST_IOSTREAMS_OPTIMAL_BUFFER_SIZE_HPP_INCLUDED |
| 10 | |
| 11 | #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| 12 | # pragma once |
| 13 | #endif |
| 14 | |
| 15 | #include <ndnboost/config.hpp> // DEDUCED_TYPENAME, MSVC. |
| 16 | #include <ndnboost/detail/workaround.hpp> |
| 17 | #include <ndnboost/iostreams/constants.hpp> // constants. |
| 18 | #include <ndnboost/iostreams/detail/dispatch.hpp> |
| 19 | #include <ndnboost/iostreams/detail/wrap_unwrap.hpp> |
| 20 | #include <ndnboost/iostreams/operations_fwd.hpp> |
| 21 | #include <ndnboost/mpl/if.hpp> |
| 22 | |
| 23 | // Must come last. |
| 24 | #include <ndnboost/iostreams/detail/config/disable_warnings.hpp> |
| 25 | |
| 26 | namespace ndnboost { namespace iostreams { |
| 27 | |
| 28 | namespace detail { |
| 29 | |
| 30 | template<typename T> |
| 31 | struct optimal_buffer_size_impl; |
| 32 | |
| 33 | } // End namespace detail. |
| 34 | |
| 35 | template<typename T> |
| 36 | std::streamsize optimal_buffer_size(const T& t) |
| 37 | { |
| 38 | typedef detail::optimal_buffer_size_impl<T> impl; |
| 39 | return impl::optimal_buffer_size(detail::unwrap(t)); |
| 40 | } |
| 41 | |
| 42 | namespace detail { |
| 43 | |
| 44 | //------------------Definition of optimal_buffer_size_impl--------------------// |
| 45 | |
| 46 | template<typename T> |
| 47 | struct optimal_buffer_size_impl |
| 48 | : mpl::if_< |
| 49 | is_custom<T>, |
| 50 | operations<T>, |
| 51 | optimal_buffer_size_impl< |
| 52 | NDNBOOST_DEDUCED_TYPENAME |
| 53 | dispatch< |
| 54 | T, optimally_buffered_tag, device_tag, filter_tag |
| 55 | >::type |
| 56 | > |
| 57 | >::type |
| 58 | { }; |
| 59 | |
| 60 | template<> |
| 61 | struct optimal_buffer_size_impl<optimally_buffered_tag> { |
| 62 | template<typename T> |
| 63 | static std::streamsize optimal_buffer_size(const T& t) |
| 64 | { return t.optimal_buffer_size(); } |
| 65 | }; |
| 66 | |
| 67 | template<> |
| 68 | struct optimal_buffer_size_impl<device_tag> { |
| 69 | template<typename T> |
| 70 | static std::streamsize optimal_buffer_size(const T&) |
| 71 | { return default_device_buffer_size; } |
| 72 | }; |
| 73 | |
| 74 | template<> |
| 75 | struct optimal_buffer_size_impl<filter_tag> { |
| 76 | template<typename T> |
| 77 | static std::streamsize optimal_buffer_size(const T&) |
| 78 | { return default_filter_buffer_size; } |
| 79 | }; |
| 80 | |
| 81 | } // End namespace detail. |
| 82 | |
| 83 | } } // End namespaces iostreams, boost. |
| 84 | |
| 85 | #include <ndnboost/iostreams/detail/config/enable_warnings.hpp> |
| 86 | |
| 87 | #endif // #ifndef NDNBOOST_IOSTREAMS_OPTIMAL_BUFFER_SIZE_HPP_INCLUDED |