ceph/src/boost/libs/asio/include/boost/asio/detail/win_iocp_socket_send_op.hpp

   1 //
   2 // detail/win_iocp_socket_send_op.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 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_WIN_IOCP_SOCKET_SEND_OP_HPP
  12 #define BOOST_ASIO_DETAIL_WIN_IOCP_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_HAS_IOCP)
  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/operation.hpp>
  29 #include <boost/asio/detail/socket_ops.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>
  39 class win_iocp_socket_send_op : public operation
  40 {
  41 public:
  42   BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_send_op);
  43
  44   win_iocp_socket_send_op(socket_ops::weak_cancel_token_type cancel_token,
  45       const ConstBufferSequence& buffers, Handler& handler)
  46     : operation(&win_iocp_socket_send_op::do_complete),
  47       cancel_token_(cancel_token),
  48       buffers_(buffers),
  49       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
  50   {
  51   }
  52
  53   static void do_complete(io_service_impl* owner, operation* base,
  54       const boost::system::error_code& result_ec,
  55       std::size_t bytes_transferred)
  56   {
  57     boost::system::error_code ec(result_ec);
  58
  59     // Take ownership of the operation object.
  60     win_iocp_socket_send_op* o(static_cast<win_iocp_socket_send_op*>(base));
  61     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
  62
  63     BOOST_ASIO_HANDLER_COMPLETION((o));
  64
  65 #if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
  66     // Check whether buffers are still valid.
  67     if (owner)
  68     {
  69       buffer_sequence_adapter<boost::asio::const_buffer,
  70           ConstBufferSequence>::validate(o->buffers_);
  71     }
  72 #endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
  73
  74     socket_ops::complete_iocp_send(o->cancel_token_, ec);
  75
  76     // Make a copy of the handler so that the memory can be deallocated before
  77     // the upcall is made. Even if we're not about to make an upcall, a
  78     // sub-object of the handler may be the true owner of the memory associated
  79     // with the handler. Consequently, a local copy of the handler is required
  80     // to ensure that any owning sub-object remains valid until after we have
  81     // deallocated the memory here.
  82     detail::binder2<Handler, boost::system::error_code, std::size_t>
  83       handler(o->handler_, ec, bytes_transferred);
  84     p.h = boost::asio::detail::addressof(handler.handler_);
  85     p.reset();
  86
  87     // Make the upcall if required.
  88     if (owner)
  89     {
  90       fenced_block b(fenced_block::half);
  91       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
  92       boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_);
  93       BOOST_ASIO_HANDLER_INVOCATION_END;
  94     }
  95   }
  96
  97 private:
  98   socket_ops::weak_cancel_token_type cancel_token_;
  99   ConstBufferSequence buffers_;
 100   Handler handler_;
 101 };
 102
 103 } // namespace detail
 104 } // namespace asio
 105 } // namespace boost
 106
 107 #include <boost/asio/detail/pop_options.hpp>
 108
 109 #endif // defined(BOOST_ASIO_HAS_IOCP)
 110
 111 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_SEND_OP_HPP