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

   1 //
   2 // detail/reactive_socket_connect_op.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2020 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_REACTIVE_SOCKET_CONNECT_OP_HPP
  12 #define BOOST_ASIO_DETAIL_REACTIVE_SOCKET_CONNECT_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 #include <boost/asio/detail/bind_handler.hpp>
  20 #include <boost/asio/detail/fenced_block.hpp>
  21 #include <boost/asio/detail/handler_alloc_helpers.hpp>
  22 #include <boost/asio/detail/handler_invoke_helpers.hpp>
  23 #include <boost/asio/detail/handler_work.hpp>
  24 #include <boost/asio/detail/memory.hpp>
  25 #include <boost/asio/detail/reactor_op.hpp>
  26 #include <boost/asio/detail/socket_ops.hpp>
  27
  28 #include <boost/asio/detail/push_options.hpp>
  29
  30 namespace boost {
  31 namespace asio {
  32 namespace detail {
  33
  34 class reactive_socket_connect_op_base : public reactor_op
  35 {
  36 public:
  37   reactive_socket_connect_op_base(const boost::system::error_code& success_ec,
  38       socket_type socket, func_type complete_func)
  39     : reactor_op(success_ec,
  40         &reactive_socket_connect_op_base::do_perform, complete_func),
  41       socket_(socket)
  42   {
  43   }
  44
  45   static status do_perform(reactor_op* base)
  46   {
  47     reactive_socket_connect_op_base* o(
  48         static_cast<reactive_socket_connect_op_base*>(base));
  49
  50     status result = socket_ops::non_blocking_connect(
  51         o->socket_, o->ec_) ? done : not_done;
  52
  53     BOOST_ASIO_HANDLER_REACTOR_OPERATION((*o, "non_blocking_connect", o->ec_));
  54
  55     return result;
  56   }
  57
  58 private:
  59   socket_type socket_;
  60 };
  61
  62 template <typename Handler, typename IoExecutor>
  63 class reactive_socket_connect_op : public reactive_socket_connect_op_base
  64 {
  65 public:
  66   BOOST_ASIO_DEFINE_HANDLER_PTR(reactive_socket_connect_op);
  67
  68   reactive_socket_connect_op(const boost::system::error_code& success_ec,
  69       socket_type socket, Handler& handler, const IoExecutor& io_ex)
  70     : reactive_socket_connect_op_base(success_ec, socket,
  71         &reactive_socket_connect_op::do_complete),
  72       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)),
  73       work_(handler_, io_ex)
  74   {
  75   }
  76
  77   static void do_complete(void* owner, operation* base,
  78       const boost::system::error_code& /*ec*/,
  79       std::size_t /*bytes_transferred*/)
  80   {
  81     // Take ownership of the handler object.
  82     reactive_socket_connect_op* o
  83       (static_cast<reactive_socket_connect_op*>(base));
  84     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
  85
  86     BOOST_ASIO_HANDLER_COMPLETION((*o));
  87
  88     // Take ownership of the operation's outstanding work.
  89     handler_work<Handler, IoExecutor> w(
  90         BOOST_ASIO_MOVE_CAST2(handler_work<Handler, IoExecutor>)(
  91           o->work_));
  92
  93     // Make a copy of the handler so that the memory can be deallocated before
  94     // the upcall is made. Even if we're not about to make an upcall, a
  95     // sub-object of the handler may be the true owner of the memory associated
  96     // with the handler. Consequently, a local copy of the handler is required
  97     // to ensure that any owning sub-object remains valid until after we have
  98     // deallocated the memory here.
  99     detail::binder1<Handler, boost::system::error_code>
 100       handler(o->handler_, o->ec_);
 101     p.h = boost::asio::detail::addressof(handler.handler_);
 102     p.reset();
 103
 104     // Make the upcall if required.
 105     if (owner)
 106     {
 107       fenced_block b(fenced_block::half);
 108       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
 109       w.complete(handler, handler.handler_);
 110       BOOST_ASIO_HANDLER_INVOCATION_END;
 111     }
 112   }
 113
 114 private:
 115   Handler handler_;
 116   handler_work<Handler, IoExecutor> work_;
 117 };
 118
 119 } // namespace detail
 120 } // namespace asio
 121 } // namespace boost
 122
 123 #include <boost/asio/detail/pop_options.hpp>
 124
 125 #endif // BOOST_ASIO_DETAIL_REACTIVE_SOCKET_CONNECT_OP_HPP