// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) | |
// (C) Copyright 2005-2007 Jonathan Turkanis | |
// Distributed under the Boost Software License, Version 1.0. (See accompanying | |
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) | |
// See http://www.boost.org/libs/iostreams for documentation. | |
namespace boost { namespace iostreams { | |
namespace detail { | |
template<typename T> | |
struct close_impl; | |
} // End namespace detail. | |
template<typename T> | |
void close(T& t) { detail::close_all(t); } | |
template<typename T> | |
void close(T& t, BOOST_IOS::openmode which) | |
{ | |
typedef typename detail::unwrapped_type<T>::type unwrapped; | |
detail::close_impl<T>::inner<unwrapped>::close(detail::unwrap(t), which); | |
} | |
template<typename T, typename Sink> | |
void close(T& t, Sink& snk, BOOST_IOS::openmode which) | |
{ | |
typedef typename detail::unwrapped_type<T>::type unwrapped; | |
detail::close_impl<T>::inner<unwrapped>::close(detail::unwrap(t), snk, which); | |
} | |
namespace detail { | |
//------------------Definition of close_impl----------------------------------// | |
template<typename T> | |
struct close_tag { | |
typedef typename category_of<T>::type category; | |
typedef typename | |
mpl::eval_if< | |
is_convertible<category, closable_tag>, | |
mpl::if_< | |
mpl::or_< | |
is_convertible<category, two_sequence>, | |
is_convertible<category, dual_use> | |
>, | |
two_sequence, | |
closable_tag | |
>, | |
mpl::identity<any_tag> | |
>::type type; | |
}; | |
template<typename T> | |
struct close_impl | |
: mpl::if_< | |
is_custom<T>, | |
operations<T>, | |
close_impl<BOOST_DEDUCED_TYPENAME close_tag<T>::type> | |
>::type | |
{ }; | |
template<> | |
struct close_impl<any_tag> { | |
template<typename T> | |
struct inner { | |
static void close(T& t, BOOST_IOS::openmode which) | |
{ | |
if (which == BOOST_IOS::out) | |
iostreams::flush(t); | |
} | |
template<typename Sink> | |
static void close(T& t, Sink& snk, BOOST_IOS::openmode which) | |
{ | |
if (which == BOOST_IOS::out) { | |
non_blocking_adapter<Sink> nb(snk); | |
iostreams::flush(t, nb); | |
} | |
} | |
}; | |
}; | |
template<> | |
struct close_impl<closable_tag> { | |
template<typename T> | |
struct inner { | |
static void close(T& t, BOOST_IOS::openmode which) | |
{ | |
typedef typename category_of<T>::type category; | |
const bool in = is_convertible<category, input>::value && | |
!is_convertible<category, output>::value; | |
if (in == (which == BOOST_IOS::in)) | |
t.close(); | |
} | |
template<typename Sink> | |
static void close(T& t, Sink& snk, BOOST_IOS::openmode which) | |
{ | |
typedef typename category_of<T>::type category; | |
const bool in = is_convertible<category, input>::value && | |
!is_convertible<category, output>::value; | |
if (in == (which == BOOST_IOS::in)) { | |
non_blocking_adapter<Sink> nb(snk); | |
t.close(nb); | |
} | |
} | |
}; | |
}; | |
template<> | |
struct close_impl<two_sequence> { | |
template<typename T> | |
struct inner { | |
static void close(T& t, BOOST_IOS::openmode which) { t.close(which); } | |
template<typename Sink> | |
static void close(T& t, Sink& snk, BOOST_IOS::openmode which) | |
{ | |
non_blocking_adapter<Sink> nb(snk); | |
t.close(nb, which); | |
} | |
}; | |
}; | |
} // End namespace detail. | |
} } // End namespaces iostreams, boost. |