sl@0: // (C) Copyright Jonathan Turkanis 2003.
sl@0: // Distributed under the Boost Software License, Version 1.0. (See accompanying
sl@0: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
sl@0: 
sl@0: // See http://www.boost.org/libs/iostreams for documentation.
sl@0: 
sl@0: #ifndef BOOST_IOSTREAMS_CLOSE_HPP_INCLUDED
sl@0: #define BOOST_IOSTREAMS_CLOSE_HPP_INCLUDED
sl@0: 
sl@0: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
sl@0: # pragma once
sl@0: #endif
sl@0: 
sl@0: #include <boost/config.hpp>  // DEDUCED_TYPENAME, MSVC.
sl@0: #include <boost/detail/workaround.hpp>
sl@0: #include <boost/iostreams/categories.hpp>
sl@0: #include <boost/iostreams/flush.hpp>
sl@0: #include <boost/iostreams/detail/adapter/non_blocking_adapter.hpp>
sl@0: #include <boost/iostreams/detail/wrap_unwrap.hpp>
sl@0: #include <boost/iostreams/operations_fwd.hpp>
sl@0: #include <boost/iostreams/traits.hpp>
sl@0: #include <boost/mpl/identity.hpp>
sl@0: #include <boost/mpl/if.hpp>
sl@0: #include <boost/type_traits/is_convertible.hpp>
sl@0: 
sl@0: // Must come last.
sl@0: #include <boost/iostreams/detail/config/disable_warnings.hpp>
sl@0: 
sl@0: #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //-----------------------------------//
sl@0: # include <boost/iostreams/detail/vc6/close.hpp>
sl@0: #else // #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //--------------------------//
sl@0: 
sl@0: namespace boost { namespace iostreams {
sl@0: 
sl@0: namespace detail {
sl@0: 
sl@0: template<typename T>
sl@0: struct close_impl;
sl@0: 
sl@0: } // End namespace detail.
sl@0: 
sl@0: template<typename T>
sl@0: void close(T& t, BOOST_IOS::openmode which)
sl@0: { detail::close_impl<T>::close(detail::unwrap(t), which); }
sl@0: 
sl@0: template<typename T, typename Sink>
sl@0: void close(T& t, Sink& snk, BOOST_IOS::openmode which)
sl@0: { detail::close_impl<T>::close(detail::unwrap(t), snk, which); }
sl@0: 
sl@0: namespace detail {
sl@0: 
sl@0: //------------------Definition of close_impl----------------------------------//
sl@0: 
sl@0: template<typename T>
sl@0: struct close_tag {
sl@0:     typedef typename category_of<T>::type category;
sl@0:     typedef typename
sl@0:             mpl::eval_if<
sl@0:                 is_convertible<category, closable_tag>,
sl@0:                 mpl::if_<
sl@0:                     mpl::or_<
sl@0:                         is_convertible<category, two_sequence>,
sl@0:                         is_convertible<category, dual_use>
sl@0:                     >,
sl@0:                     two_sequence,
sl@0:                     closable_tag
sl@0:                 >,
sl@0:                 mpl::identity<any_tag>
sl@0:             >::type type;
sl@0: };
sl@0: 
sl@0: template<typename T>
sl@0: struct close_impl
sl@0:     : mpl::if_<
sl@0:           is_custom<T>,
sl@0:           operations<T>,
sl@0:           close_impl<BOOST_DEDUCED_TYPENAME close_tag<T>::type>
sl@0:       >::type
sl@0:     { };
sl@0: 
sl@0: template<>
sl@0: struct close_impl<any_tag> {
sl@0:     template<typename T>
sl@0:     static void close(T& t, BOOST_IOS::openmode which)
sl@0:     {
sl@0:         if ((which & BOOST_IOS::out) != 0)
sl@0:             iostreams::flush(t);
sl@0:     }
sl@0: 
sl@0:     template<typename T, typename Sink>
sl@0:     static void close(T& t, Sink& snk, BOOST_IOS::openmode which)
sl@0:     {
sl@0:         if ((which & BOOST_IOS::out) != 0) {
sl@0:             non_blocking_adapter<Sink> nb(snk);
sl@0:             iostreams::flush(t, nb);
sl@0:         }
sl@0:     }
sl@0: };
sl@0: 
sl@0: #include <boost/iostreams/detail/config/disable_warnings.hpp> // Borland.
sl@0: template<>
sl@0: struct close_impl<closable_tag> {
sl@0:     template<typename T>
sl@0:     static void close(T& t, BOOST_IOS::openmode which)
sl@0:     {
sl@0:         typedef typename category_of<T>::type category;
sl@0:         const bool in =  is_convertible<category, input>::value &&
sl@0:                         !is_convertible<category, output>::value;
sl@0:         if (in == ((which & BOOST_IOS::in) != 0))
sl@0:             t.close();
sl@0:     }
sl@0:     template<typename T, typename Sink>
sl@0:     static void close(T& t, Sink& snk, BOOST_IOS::openmode which)
sl@0:     {
sl@0:         typedef typename category_of<T>::type category;
sl@0:         const bool in =  is_convertible<category, input>::value &&
sl@0:                         !is_convertible<category, output>::value;
sl@0:         if (in == ((which & BOOST_IOS::in) != 0)) {
sl@0:             non_blocking_adapter<Sink> nb(snk);
sl@0:             t.close(nb);
sl@0:         }
sl@0:     }
sl@0: };
sl@0: 
sl@0: template<>
sl@0: struct close_impl<two_sequence> {
sl@0:     template<typename T>
sl@0:     static void close(T& t, BOOST_IOS::openmode which) { t.close(which); }
sl@0:     template<typename T, typename Sink>
sl@0:     static void close(T& t, Sink& snk, BOOST_IOS::openmode which)
sl@0:     {
sl@0:         non_blocking_adapter<Sink> nb(snk);
sl@0:         t.close(nb, which);
sl@0:     }
sl@0: };
sl@0: 
sl@0: } // End namespace detail.
sl@0: 
sl@0: } } // End namespaces iostreams, boost.
sl@0: 
sl@0: #endif // #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //-------------------------//
sl@0: 
sl@0: #include <boost/iostreams/detail/config/enable_warnings.hpp>
sl@0: 
sl@0: #endif // #ifndef BOOST_IOSTREAMS_CLOSE_HPP_INCLUDED