ceph/src/boost/boost/asio/detail/winrt_socket_send_op.hpp

   1 //
   2 // detail/winrt_socket_send_op.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2022 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/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/handler_work.hpp>
  28 #include <boost/asio/detail/memory.hpp>
  29 #include <boost/asio/detail/winrt_async_op.hpp>
  30 #include <boost/asio/error.hpp>
  31
  32 #include <boost/asio/detail/push_options.hpp>
  33
  34 namespace boost {
  35 namespace asio {
  36 namespace detail {
  37
  38 template <typename ConstBufferSequence, typename Handler, typename IoExecutor>
  39 class winrt_socket_send_op :
  40   public winrt_async_op<unsigned int>
  41 {
  42 public:
  43   BOOST_ASIO_DEFINE_HANDLER_PTR(winrt_socket_send_op);
  44
  45   winrt_socket_send_op(const ConstBufferSequence& buffers,
  46       Handler& handler, const IoExecutor& io_ex)
  47     : winrt_async_op<unsigned int>(&winrt_socket_send_op::do_complete),
  48       buffers_(buffers),
  49       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)),
  50       work_(handler_, io_ex)
  51   {
  52   }
  53
  54   static void do_complete(void* owner, operation* base,
  55       const boost::system::error_code&, std::size_t)
  56   {
  57     // Take ownership of the operation object.
  58     winrt_socket_send_op* o(static_cast<winrt_socket_send_op*>(base));
  59     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
  60
  61     BOOST_ASIO_HANDLER_COMPLETION((*o));
  62
  63     // Take ownership of the operation's outstanding work.
  64     handler_work<Handler, IoExecutor> w(
  65         BOOST_ASIO_MOVE_CAST2(handler_work<Handler, IoExecutor>)(
  66           o->work_));
  67
  68 #if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
  69     // Check whether buffers are still valid.
  70     if (owner)
  71     {
  72       buffer_sequence_adapter<boost::asio::const_buffer,
  73           ConstBufferSequence>::validate(o->buffers_);
  74     }
  75 #endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
  76
  77     // Make a copy of the handler so that the memory can be deallocated before
  78     // the upcall is made. Even if we're not about to make an upcall, a
  79     // sub-object of the handler may be the true owner of the memory associated
  80     // with the handler. Consequently, a local copy of the handler is required
  81     // to ensure that any owning sub-object remains valid until after we have
  82     // deallocated the memory here.
  83     detail::binder2<Handler, boost::system::error_code, std::size_t>
  84       handler(o->handler_, o->ec_, o->result_);
  85     p.h = boost::asio::detail::addressof(handler.handler_);
  86     p.reset();
  87
  88     // Make the upcall if required.
  89     if (owner)
  90     {
  91       fenced_block b(fenced_block::half);
  92       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
  93       w.complete(handler, handler.handler_);
  94       BOOST_ASIO_HANDLER_INVOCATION_END;
  95     }
  96   }
  97
  98 private:
  99   ConstBufferSequence buffers_;
 100   Handler handler_;
 101   handler_work<Handler, IoExecutor> executor_;
 102 };
 103
 104 } // namespace detail
 105 } // namespace asio
 106 } // namespace boost
 107
 108 #include <boost/asio/detail/pop_options.hpp>
 109
 110 #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
 111
 112 #endif // BOOST_ASIO_DETAIL_WINRT_SOCKET_SEND_OP_HPP