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

   1 //
   2 // detail/win_iocp_wait_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_WIN_IOCP_WAIT_OP_HPP
  12 #define BOOST_ASIO_DETAIL_WIN_IOCP_WAIT_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/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/reactor_op.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 Handler>
  39 class win_iocp_wait_op : public reactor_op
  40 {
  41 public:
  42   BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_wait_op);
  43
  44   win_iocp_wait_op(socket_ops::weak_cancel_token_type cancel_token,
  45       Handler& handler)
  46     : reactor_op(&win_iocp_wait_op::do_perform,
  47         &win_iocp_wait_op::do_complete),
  48       cancel_token_(cancel_token),
  49       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
  50   {
  51     handler_work<Handler>::start(handler_);
  52   }
  53
  54   static status do_perform(reactor_op*)
  55   {
  56     return done;
  57   }
  58
  59   static void do_complete(void* owner, operation* base,
  60       const boost::system::error_code& result_ec,
  61       std::size_t /*bytes_transferred*/)
  62   {
  63     boost::system::error_code ec(result_ec);
  64
  65     // Take ownership of the operation object.
  66     win_iocp_wait_op* o(static_cast<win_iocp_wait_op*>(base));
  67     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
  68     handler_work<Handler> w(o->handler_);
  69
  70     BOOST_ASIO_HANDLER_COMPLETION((*o));
  71
  72     // The reactor may have stored a result in the operation object.
  73     if (o->ec_)
  74       ec = o->ec_;
  75
  76     // Map non-portable errors to their portable counterparts.
  77     if (ec.value() == ERROR_NETNAME_DELETED)
  78     {
  79       if (o->cancel_token_.expired())
  80         ec = boost::asio::error::operation_aborted;
  81       else
  82         ec = boost::asio::error::connection_reset;
  83     }
  84     else if (ec.value() == ERROR_PORT_UNREACHABLE)
  85     {
  86       ec = boost::asio::error::connection_refused;
  87     }
  88
  89     // Make a copy of the handler so that the memory can be deallocated before
  90     // the upcall is made. Even if we're not about to make an upcall, a
  91     // sub-object of the handler may be the true owner of the memory associated
  92     // with the handler. Consequently, a local copy of the handler is required
  93     // to ensure that any owning sub-object remains valid until after we have
  94     // deallocated the memory here.
  95     detail::binder1<Handler, boost::system::error_code>
  96       handler(o->handler_, ec);
  97     p.h = boost::asio::detail::addressof(handler.handler_);
  98     p.reset();
  99
 100     // Make the upcall if required.
 101     if (owner)
 102     {
 103       fenced_block b(fenced_block::half);
 104       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
 105       w.complete(handler, handler.handler_);
 106       BOOST_ASIO_HANDLER_INVOCATION_END;
 107     }
 108   }
 109
 110 private:
 111   socket_ops::weak_cancel_token_type cancel_token_;
 112   Handler handler_;
 113 };
 114
 115 } // namespace detail
 116 } // namespace asio
 117 } // namespace boost
 118
 119 #include <boost/asio/detail/pop_options.hpp>
 120
 121 #endif // defined(BOOST_ASIO_HAS_IOCP)
 122
 123 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_WAIT_OP_HPP