boost/asio/detail/winrt_socket_send_op.hpp

   1 //
   2 // detail/winrt_socket_send_op.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   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)
   9 //
  10
  11 #ifndef BOOST_ASIO_DETAIL_WINRT_SOCKET_SEND_OP_HPP
  12 #define BOOST_ASIO_DETAIL_WINRT_SOCKET_SEND_OP_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19
  20 #if defined(BOOST_ASIO_WINDOWS_RUNTIME)
  21
  22 #include <boost/asio/detail/addressof.hpp>
  23 #include <boost/asio/detail/bind_handler.hpp>
  24 #include <boost/asio/detail/buffer_sequence_adapter.hpp>
  25 #include <boost/asio/detail/fenced_block.hpp>
  26 #include <boost/asio/detail/handler_alloc_helpers.hpp>
  27 #include <boost/asio/detail/handler_invoke_helpers.hpp>
  28 #include <boost/asio/detail/winrt_async_op.hpp>
  29 #include <boost/asio/error.hpp>
  30
  31 #include <boost/asio/detail/push_options.hpp>
  32
  33 namespace boost {
  34 namespace asio {
  35 namespace detail {
  36
  37 template <typename ConstBufferSequence, typename Handler>
  38 class winrt_socket_send_op :
  39   public winrt_async_op<unsigned int>
  40 {
  41 public:
  42   BOOST_ASIO_DEFINE_HANDLER_PTR(winrt_socket_send_op);
  43
  44   winrt_socket_send_op(const ConstBufferSequence& buffers, Handler& handler)
  45     : winrt_async_op<unsigned int>(&winrt_socket_send_op::do_complete),
  46       buffers_(buffers),
  47       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
  48   {
  49   }
  50
  51   static void do_complete(io_service_impl* owner, operation* base,
  52       const boost::system::error_code&, std::size_t)
  53   {
  54     // Take ownership of the operation object.
  55     winrt_socket_send_op* o(static_cast<winrt_socket_send_op*>(base));
  56     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
  57
  58     BOOST_ASIO_HANDLER_COMPLETION((o));
  59
  60 #if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
  61     // Check whether buffers are still valid.
  62     if (owner)
  63     {
  64       buffer_sequence_adapter<boost::asio::const_buffer,
  65           ConstBufferSequence>::validate(o->buffers_);
  66     }
  67 #endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
  68
  69     // Make a copy of the handler so that the memory can be deallocated before
  70     // the upcall is made. Even if we're not about to make an upcall, a
  71     // sub-object of the handler may be the true owner of the memory associated
  72     // with the handler. Consequently, a local copy of the handler is required
  73     // to ensure that any owning sub-object remains valid until after we have
  74     // deallocated the memory here.
  75     detail::binder2<Handler, boost::system::error_code, std::size_t>
  76       handler(o->handler_, o->ec_, o->result_);
  77     p.h = boost::asio::detail::addressof(handler.handler_);
  78     p.reset();
  79
  80     // Make the upcall if required.
  81     if (owner)
  82     {
  83       fenced_block b(fenced_block::half);
  84       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
  85       boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_);
  86       BOOST_ASIO_HANDLER_INVOCATION_END;
  87     }
  88   }
  89
  90 private:
  91   ConstBufferSequence buffers_;
  92   Handler handler_;
  93 };
  94
  95 } // namespace detail
  96 } // namespace asio
  97 } // namespace boost
  98
  99 #include <boost/asio/detail/pop_options.hpp>
 100
 101 #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
 102
 103 #endif // BOOST_ASIO_DETAIL_WINRT_SOCKET_SEND_OP_HPP