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//
// detail/win_iocp_null_buffers_op.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// 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)
//
#ifndef BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_OP_HPP
#define BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_OP_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#if defined(BOOST_ASIO_HAS_IOCP)
#include <boost/asio/detail/addressof.hpp>
#include <boost/asio/detail/bind_handler.hpp>
#include <boost/asio/detail/buffer_sequence_adapter.hpp>
#include <boost/asio/detail/fenced_block.hpp>
#include <boost/asio/detail/handler_alloc_helpers.hpp>
#include <boost/asio/detail/handler_invoke_helpers.hpp>
#include <boost/asio/detail/reactor_op.hpp>
#include <boost/asio/detail/socket_ops.hpp>
#include <boost/asio/error.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace detail {
template <typename Handler>
class win_iocp_null_buffers_op : public reactor_op
{
public:
BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_null_buffers_op);
win_iocp_null_buffers_op(socket_ops::weak_cancel_token_type cancel_token,
Handler& handler)
: reactor_op(&win_iocp_null_buffers_op::do_perform,
&win_iocp_null_buffers_op::do_complete),
cancel_token_(cancel_token),
handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
{
}
static bool do_perform(reactor_op*)
{
return true;
}
static void do_complete(io_service_impl* owner, operation* base,
const boost::system::error_code& result_ec,
std::size_t bytes_transferred)
{
boost::system::error_code ec(result_ec);
// Take ownership of the operation object.
win_iocp_null_buffers_op* o(static_cast<win_iocp_null_buffers_op*>(base));
ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
BOOST_ASIO_HANDLER_COMPLETION((o));
// The reactor may have stored a result in the operation object.
if (o->ec_)
ec = o->ec_;
// Map non-portable errors to their portable counterparts.
if (ec.value() == ERROR_NETNAME_DELETED)
{
if (o->cancel_token_.expired())
ec = boost::asio::error::operation_aborted;
else
ec = boost::asio::error::connection_reset;
}
else if (ec.value() == ERROR_PORT_UNREACHABLE)
{
ec = boost::asio::error::connection_refused;
}
// Make a copy of the handler so that the memory can be deallocated before
// the upcall is made. Even if we're not about to make an upcall, a
// sub-object of the handler may be the true owner of the memory associated
// with the handler. Consequently, a local copy of the handler is required
// to ensure that any owning sub-object remains valid until after we have
// deallocated the memory here.
detail::binder2<Handler, boost::system::error_code, std::size_t>
handler(o->handler_, ec, bytes_transferred);
p.h = boost::asio::detail::addressof(handler.handler_);
p.reset();
// Make the upcall if required.
if (owner)
{
fenced_block b(fenced_block::half);
BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_);
BOOST_ASIO_HANDLER_INVOCATION_END;
}
}
private:
socket_ops::weak_cancel_token_type cancel_token_;
Handler handler_;
};
} // namespace detail
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // defined(BOOST_ASIO_HAS_IOCP)
#endif // BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_OP_HPP
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