2 // detail/win_iocp_null_buffers_op.hpp
3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
11 #ifndef BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_OP_HPP
12 #define BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_OP_HPP
14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
18 #include <boost/asio/detail/config.hpp>
20 #if defined(BOOST_ASIO_HAS_IOCP)
22 #include <boost/asio/detail/bind_handler.hpp>
23 #include <boost/asio/detail/buffer_sequence_adapter.hpp>
24 #include <boost/asio/detail/fenced_block.hpp>
25 #include <boost/asio/detail/handler_alloc_helpers.hpp>
26 #include <boost/asio/detail/handler_invoke_helpers.hpp>
27 #include <boost/asio/detail/memory.hpp>
28 #include <boost/asio/detail/reactor_op.hpp>
29 #include <boost/asio/detail/socket_ops.hpp>
30 #include <boost/asio/error.hpp>
32 #include <boost/asio/detail/push_options.hpp>
38 template <typename Handler>
39 class win_iocp_null_buffers_op : public reactor_op
42 BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_null_buffers_op);
44 win_iocp_null_buffers_op(socket_ops::weak_cancel_token_type cancel_token,
46 : reactor_op(&win_iocp_null_buffers_op::do_perform,
47 &win_iocp_null_buffers_op::do_complete),
48 cancel_token_(cancel_token),
49 handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
51 handler_work<Handler>::start(handler_);
54 static status do_perform(reactor_op*)
59 static void do_complete(void* owner, operation* base,
60 const boost::system::error_code& result_ec,
61 std::size_t bytes_transferred)
63 boost::system::error_code ec(result_ec);
65 // Take ownership of the operation object.
66 win_iocp_null_buffers_op* o(static_cast<win_iocp_null_buffers_op*>(base));
67 ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
68 handler_work<Handler> w(o->handler_);
70 BOOST_ASIO_HANDLER_COMPLETION((*o));
72 // The reactor may have stored a result in the operation object.
76 // Map non-portable errors to their portable counterparts.
77 if (ec.value() == ERROR_NETNAME_DELETED)
79 if (o->cancel_token_.expired())
80 ec = boost::asio::error::operation_aborted;
82 ec = boost::asio::error::connection_reset;
84 else if (ec.value() == ERROR_PORT_UNREACHABLE)
86 ec = boost::asio::error::connection_refused;
89 // Make a copy of the handler so that the memory can be deallocated before
90 // the upcall is made. Even if we're not about to make an upcall, a
91 // sub-object of the handler may be the true owner of the memory associated
92 // with the handler. Consequently, a local copy of the handler is required
93 // to ensure that any owning sub-object remains valid until after we have
94 // deallocated the memory here.
95 detail::binder2<Handler, boost::system::error_code, std::size_t>
96 handler(o->handler_, ec, bytes_transferred);
97 p.h = boost::asio::detail::addressof(handler.handler_);
100 // Make the upcall if required.
103 fenced_block b(fenced_block::half);
104 BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
105 w.complete(handler, handler.handler_);
106 BOOST_ASIO_HANDLER_INVOCATION_END;
111 socket_ops::weak_cancel_token_type cancel_token_;
115 } // namespace detail
119 #include <boost/asio/detail/pop_options.hpp>
121 #endif // defined(BOOST_ASIO_HAS_IOCP)
123 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_OP_HPP