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_FLUSH_HPP_INCLUDED
sl@0: #define BOOST_IOSTREAMS_FLUSH_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/detail/dispatch.hpp>
sl@0: #include <boost/iostreams/detail/streambuf.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/if.hpp>
sl@0: 
sl@0: // Must come last.
sl@0: #include <boost/iostreams/detail/config/disable_warnings.hpp>
sl@0: 
sl@0: namespace boost { namespace iostreams {
sl@0: 
sl@0: namespace detail {
sl@0: 
sl@0: template<typename T>
sl@0: struct flush_device_impl;
sl@0: 
sl@0: template<typename T>
sl@0: struct flush_filter_impl;
sl@0: 
sl@0: } // End namespace detail.
sl@0: 
sl@0: template<typename T>
sl@0: bool flush(T& t)
sl@0: { return detail::flush_device_impl<T>::flush(detail::unwrap(t)); }
sl@0: 
sl@0: template<typename T, typename Sink>
sl@0: bool flush(T& t, Sink& snk)
sl@0: { return detail::flush_filter_impl<T>::flush(detail::unwrap(t), snk); }
sl@0: 
sl@0: namespace detail {
sl@0: 
sl@0: //------------------Definition of flush_device_impl---------------------------//
sl@0: 
sl@0: template<typename T>
sl@0: struct flush_device_impl
sl@0:     : mpl::if_<
sl@0:           is_custom<T>,
sl@0:           operations<T>,
sl@0:           flush_device_impl<
sl@0:               BOOST_DEDUCED_TYPENAME
sl@0:               dispatch<
sl@0:                   T, ostream_tag, streambuf_tag, flushable_tag, any_tag
sl@0:               >::type
sl@0:           >
sl@0:       >::type
sl@0:     { };
sl@0: 
sl@0: template<>
sl@0: struct flush_device_impl<ostream_tag> {
sl@0:     template<typename T>
sl@0:     static bool flush(T& t)
sl@0:     { return t.rdbuf()->BOOST_IOSTREAMS_PUBSYNC() == 0; }
sl@0: };
sl@0: 
sl@0: template<>
sl@0: struct flush_device_impl<streambuf_tag> {
sl@0:     template<typename T>
sl@0:     static bool flush(T& t)
sl@0:     { return t.BOOST_IOSTREAMS_PUBSYNC() == 0; }
sl@0: };
sl@0: 
sl@0: template<>
sl@0: struct flush_device_impl<flushable_tag> {
sl@0:     template<typename T>
sl@0:     static bool flush(T& t) { return t.flush(); }
sl@0: };
sl@0: 
sl@0: template<>
sl@0: struct flush_device_impl<any_tag> {
sl@0:     template<typename T>
sl@0:     static bool flush(T&) { return true; }
sl@0: };
sl@0: 
sl@0: //------------------Definition of flush_filter_impl---------------------------//
sl@0: 
sl@0: template<typename T>
sl@0: struct flush_filter_impl
sl@0:     : mpl::if_<
sl@0:           is_custom<T>,
sl@0:           operations<T>,
sl@0:           flush_filter_impl<
sl@0:               BOOST_DEDUCED_TYPENAME
sl@0:               dispatch<
sl@0:                   T, flushable_tag, any_tag
sl@0:               >::type
sl@0:           >
sl@0:       >::type
sl@0:     { };
sl@0: 
sl@0: template<>
sl@0: struct flush_filter_impl<flushable_tag> {
sl@0:     template<typename T, typename Sink>
sl@0:     static bool flush(T& t, Sink& snk) { return t.flush(snk); }
sl@0: };
sl@0: 
sl@0: template<>
sl@0: struct flush_filter_impl<any_tag> {
sl@0:     template<typename T, typename Sink>
sl@0:     static bool flush(T&, Sink&) { return false; }
sl@0: };
sl@0: 
sl@0: } // End namespace detail.
sl@0: 
sl@0: } } // End namespaces iostreams, boost.
sl@0: 
sl@0: #include <boost/iostreams/detail/config/enable_warnings.hpp>
sl@0: 
sl@0: #endif // #ifndef BOOST_IOSTREAMS_FLUSH_HPP_INCLUDED