asio/detail/winrt_socket_connect_op.hpp

0001 //
0002 // detail/winrt_socket_connect_op.hpp
0003 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0004 //
0005 // Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0009 //
0010
0011 #ifndef BOOST_ASIO_DETAIL_WINRT_SOCKET_CONNECT_OP_HPP
0012 #define BOOST_ASIO_DETAIL_WINRT_SOCKET_CONNECT_OP_HPP
0013
0014 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
0015 # pragma once
0016 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
0017
0018 #include <boost/asio/detail/config.hpp>
0019
0020 #if defined(BOOST_ASIO_WINDOWS_RUNTIME)
0021
0022 #include <boost/asio/detail/bind_handler.hpp>
0023 #include <boost/asio/detail/buffer_sequence_adapter.hpp>
0024 #include <boost/asio/detail/fenced_block.hpp>
0025 #include <boost/asio/detail/handler_alloc_helpers.hpp>
0026 #include <boost/asio/detail/handler_work.hpp>
0027 #include <boost/asio/detail/memory.hpp>
0028 #include <boost/asio/detail/winrt_async_op.hpp>
0029 #include <boost/asio/error.hpp>
0030
0031 #include <boost/asio/detail/push_options.hpp>
0032
0033 namespace boost {
0034 namespace asio {
0035 namespace detail {
0036
0037 template <typename Handler, typename IoExecutor>
0038 class winrt_socket_connect_op :
0039   public winrt_async_op<void>
0040 {
0041 public:
0042   BOOST_ASIO_DEFINE_HANDLER_PTR(winrt_socket_connect_op);
0043
0044   winrt_socket_connect_op(Handler& handler, const IoExecutor& io_ex)
0045     : winrt_async_op<void>(&winrt_socket_connect_op::do_complete),
0046       handler_(static_cast<Handler&&>(handler)),
0047       work_(handler_, io_ex)
0048   {
0049   }
0050
0051   static void do_complete(void* owner, operation* base,
0052       const boost::system::error_code&, std::size_t)
0053   {
0054     // Take ownership of the operation object.
0055     BOOST_ASIO_ASSUME(base != 0);
0056     winrt_socket_connect_op* o(static_cast<winrt_socket_connect_op*>(base));
0057     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
0058
0059     BOOST_ASIO_HANDLER_COMPLETION((*o));
0060
0061     // Take ownership of the operation's outstanding work.
0062     handler_work<Handler, IoExecutor> w(
0063         static_cast<handler_work<Handler, IoExecutor>&&>(
0064           o->work_));
0065
0066     // Make a copy of the handler so that the memory can be deallocated before
0067     // the upcall is made. Even if we're not about to make an upcall, a
0068     // sub-object of the handler may be the true owner of the memory associated
0069     // with the handler. Consequently, a local copy of the handler is required
0070     // to ensure that any owning sub-object remains valid until after we have
0071     // deallocated the memory here.
0072     detail::binder1<Handler, boost::system::error_code>
0073       handler(o->handler_, o->ec_);
0074     p.h = boost::asio::detail::addressof(handler.handler_);
0075     p.reset();
0076
0077     // Make the upcall if required.
0078     if (owner)
0079     {
0080       fenced_block b(fenced_block::half);
0081       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
0082       w.complete(handler, handler.handler_);
0083       BOOST_ASIO_HANDLER_INVOCATION_END;
0084     }
0085   }
0086
0087 private:
0088   Handler handler_;
0089   handler_work<Handler, IoExecutor> executor_;
0090 };
0091
0092 } // namespace detail
0093 } // namespace asio
0094 } // namespace boost
0095
0096 #include <boost/asio/detail/pop_options.hpp>
0097
0098 #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
0099
0100 #endif // BOOST_ASIO_DETAIL_WINRT_SOCKET_CONNECT_OP_HPP