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+//
+// detail/win_iocp_null_buffers_op.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2012 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/utility/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::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::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