text: //
  // detail/winrt_socket_connect_op.hpp
  // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2018 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_WINRT_SOCKET_CONNECT_OP_HPP
  #define BOOST_ASIO_DETAIL_WINRT_SOCKET_CONNECT_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_WINDOWS_RUNTIME)
  
  #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/memory.hpp>
  #include <boost/asio/detail/winrt_async_op.hpp>
  #include <boost/asio/error.hpp>
  
  #include <boost/asio/detail/push_options.hpp>
  
  namespace lslboost {
  namespace asio {
  namespace detail {
  
  template <typename Handler>
  class winrt_socket_connect_op :
    public winrt_async_op<void>
  {
  public:
    BOOST_ASIO_DEFINE_HANDLER_PTR(winrt_socket_connect_op);
  
    winrt_socket_connect_op(Handler& handler)
      : winrt_async_op<void>(&winrt_socket_connect_op::do_complete),
        handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
    {
      handler_work<Handler>::start(handler_);
    }
  
    static void do_complete(void* owner, operation* base,
        const lslboost::system::error_code&, std::size_t)
    {
      // Take ownership of the operation object.
      winrt_socket_connect_op* o(static_cast<winrt_socket_connect_op*>(base));
      ptr p = { lslboost::asio::detail::addressof(o->handler_), o, o };
      handler_work<Handler> w(o->handler_);
  
      BOOST_ASIO_HANDLER_COMPLETION((*o));
  
      // 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::binder1<Handler, lslboost::system::error_code>
        handler(o->handler_, o->ec_);
      p.h = lslboost::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_));
        w.complete(handler, handler.handler_);
        BOOST_ASIO_HANDLER_INVOCATION_END;
      }
    }
  
  private:
    Handler handler_;
  };
  
  } // namespace detail
  } // namespace asio
  } // namespace lslboost
  
  #include <boost/asio/detail/pop_options.hpp>
  
  #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
  
  #endif // BOOST_ASIO_DETAIL_WINRT_SOCKET_CONNECT_OP_HPP
  