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

   1 //
   2 // detail/winrt_socket_send_op.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2019 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/memory.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, typename IoExecutor>
  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,
  45       Handler& handler, const IoExecutor& io_ex)
  46     : winrt_async_op<unsigned int>(&winrt_socket_send_op::do_complete),
  47       buffers_(buffers),
  48       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)),
  49       io_executor_(io_ex)
  50   {
  51     handler_work<Handler, IoExecutor>::start(handler_, io_executor_);
  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     handler_work<Handler, IoExecutor> w(o->handler_, o->io_executor_);
  61
  62     BOOST_ASIO_HANDLER_COMPLETION((*o));
  63
  64 #if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
  65     // Check whether buffers are still valid.
  66     if (owner)
  67     {
  68       buffer_sequence_adapter<boost::asio::const_buffer,
  69           ConstBufferSequence>::validate(o->buffers_);
  70     }
  71 #endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
  72
  73     // Make a copy of the handler so that the memory can be deallocated before
  74     // the upcall is made. Even if we're not about to make an upcall, a
  75     // sub-object of the handler may be the true owner of the memory associated
  76     // with the handler. Consequently, a local copy of the handler is required
  77     // to ensure that any owning sub-object remains valid until after we have
  78     // deallocated the memory here.
  79     detail::binder2<Handler, boost::system::error_code, std::size_t>
  80       handler(o->handler_, o->ec_, o->result_);
  81     p.h = boost::asio::detail::addressof(handler.handler_);
  82     p.reset();
  83
  84     // Make the upcall if required.
  85     if (owner)
  86     {
  87       fenced_block b(fenced_block::half);
  88       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
  89       w.complete(handler, handler.handler_);
  90       BOOST_ASIO_HANDLER_INVOCATION_END;
  91     }
  92   }
  93
  94 private:
  95   ConstBufferSequence buffers_;
  96   Handler handler_;
  97   IoExecutor io_executor_;
  98 };
  99
 100 } // namespace detail
 101 } // namespace asio
 102 } // namespace boost
 103
 104 #include <boost/asio/detail/pop_options.hpp>
 105
 106 #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
 107
 108 #endif // BOOST_ASIO_DETAIL_WINRT_SOCKET_SEND_OP_HPP