text: //
  // detail/win_iocp_socket_recvmsg_op.hpp
  // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2015 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 ASIO_DETAIL_WIN_IOCP_SOCKET_RECVMSG_OP_HPP
  #define ASIO_DETAIL_WIN_IOCP_SOCKET_RECVMSG_OP_HPP
  
  #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  # pragma once
  #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  
  #include "RCF/external/asio/asio/detail/config.hpp"
  
  #if defined(ASIO_HAS_IOCP)
  
  #include "RCF/external/asio/asio/detail/addressof.hpp"
  #include "RCF/external/asio/asio/detail/bind_handler.hpp"
  #include "RCF/external/asio/asio/detail/buffer_sequence_adapter.hpp"
  #include "RCF/external/asio/asio/detail/fenced_block.hpp"
  #include "RCF/external/asio/asio/detail/handler_alloc_helpers.hpp"
  #include "RCF/external/asio/asio/detail/handler_invoke_helpers.hpp"
  #include "RCF/external/asio/asio/detail/operation.hpp"
  #include "RCF/external/asio/asio/detail/socket_ops.hpp"
  #include "RCF/external/asio/asio/error.hpp"
  #include "RCF/external/asio/asio/socket_base.hpp"
  
  #include "RCF/external/asio/asio/detail/push_options.hpp"
  
  namespace asio {
  namespace detail {
  
  template <typename MutableBufferSequence, typename Handler>
  class win_iocp_socket_recvmsg_op : public operation
  {
  public:
    ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_recvmsg_op);
  
    win_iocp_socket_recvmsg_op(
        socket_ops::weak_cancel_token_type cancel_token,
        const MutableBufferSequence& buffers,
        socket_base::message_flags& out_flags, Handler& handler)
      : operation(&win_iocp_socket_recvmsg_op::do_complete),
        cancel_token_(cancel_token),
        buffers_(buffers),
        out_flags_(out_flags),
        handler_(ASIO_MOVE_CAST(Handler)(handler))
    {
    }
  
    static void do_complete(io_service_impl* owner, operation* base,
        const asio::error_code& result_ec,
        std::size_t bytes_transferred)
    {
      asio::error_code ec(result_ec);
  
      // Take ownership of the operation object.
      win_iocp_socket_recvmsg_op* o(
          static_cast<win_iocp_socket_recvmsg_op*>(base));
      ptr p = { asio::detail::addressof(o->handler_), o, o };
  
      ASIO_HANDLER_COMPLETION((o));
  
  #if defined(ASIO_ENABLE_BUFFER_DEBUGGING)
      // Check whether buffers are still valid.
      if (owner)
      {
        buffer_sequence_adapter<asio::mutable_buffer,
            MutableBufferSequence>::validate(o->buffers_);
      }
  #endif // defined(ASIO_ENABLE_BUFFER_DEBUGGING)
  
      socket_ops::complete_iocp_recvmsg(o->cancel_token_, ec);
      o->out_flags_ = 0;
  
      // 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::binder2<Handler, asio::error_code, std::size_t>
        handler(o->handler_, ec, bytes_transferred);
      p.h = asio::detail::addressof(handler.handler_);
      p.reset();
  
      // Make the upcall if required.
      if (owner)
      {
        fenced_block b(fenced_block::half);
        ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
        asio_handler_invoke_helpers::invoke(handler, handler.handler_);
        ASIO_HANDLER_INVOCATION_END;
      }
    }
  
  private:
    socket_ops::weak_cancel_token_type cancel_token_;
    MutableBufferSequence buffers_;
    socket_base::message_flags& out_flags_;
    Handler handler_;
  };
  
  } // namespace detail
  } // namespace asio
  
  #include "RCF/external/asio/asio/detail/pop_options.hpp"
  
  #endif // defined(ASIO_HAS_IOCP)
  
  #endif // ASIO_DETAIL_WIN_IOCP_SOCKET_RECVMSG_OP_HPP
  