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

   1 //
   2 // detail/reactive_socket_accept_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_REACTIVE_SOCKET_ACCEPT_OP_HPP
  12 #define BOOST_ASIO_DETAIL_REACTIVE_SOCKET_ACCEPT_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/addressof.hpp>
  20 #include <boost/asio/detail/bind_handler.hpp>
  21 #include <boost/asio/detail/buffer_sequence_adapter.hpp>
  22 #include <boost/asio/detail/fenced_block.hpp>
  23 #include <boost/asio/detail/reactor_op.hpp>
  24 #include <boost/asio/detail/socket_holder.hpp>
  25 #include <boost/asio/detail/socket_ops.hpp>
  26
  27 #include <boost/asio/detail/push_options.hpp>
  28
  29 namespace boost {
  30 namespace asio {
  31 namespace detail {
  32
  33 template <typename Socket, typename Protocol>
  34 class reactive_socket_accept_op_base : public reactor_op
  35 {
  36 public:
  37   reactive_socket_accept_op_base(socket_type socket,
  38       socket_ops::state_type state, Socket& peer, const Protocol& protocol,
  39       typename Protocol::endpoint* peer_endpoint, func_type complete_func)
  40     : reactor_op(&reactive_socket_accept_op_base::do_perform, complete_func),
  41       socket_(socket),
  42       state_(state),
  43       peer_(peer),
  44       protocol_(protocol),
  45       peer_endpoint_(peer_endpoint)
  46   {
  47   }
  48
  49   static bool do_perform(reactor_op* base)
  50   {
  51     reactive_socket_accept_op_base* o(
  52         static_cast<reactive_socket_accept_op_base*>(base));
  53
  54     std::size_t addrlen = o->peer_endpoint_ ? o->peer_endpoint_->capacity() : 0;
  55     socket_type new_socket = invalid_socket;
  56     bool result = socket_ops::non_blocking_accept(o->socket_,
  57           o->state_, o->peer_endpoint_ ? o->peer_endpoint_->data() : 0,
  58           o->peer_endpoint_ ? &addrlen : 0, o->ec_, new_socket);
  59
  60     // On success, assign new connection to peer socket object.
  61     if (new_socket != invalid_socket)
  62     {
  63       socket_holder new_socket_holder(new_socket);
  64       if (o->peer_endpoint_)
  65         o->peer_endpoint_->resize(addrlen);
  66       if (!o->peer_.assign(o->protocol_, new_socket, o->ec_))
  67         new_socket_holder.release();
  68     }
  69
  70     return result;
  71   }
  72
  73 private:
  74   socket_type socket_;
  75   socket_ops::state_type state_;
  76   Socket& peer_;
  77   Protocol protocol_;
  78   typename Protocol::endpoint* peer_endpoint_;
  79 };
  80
  81 template <typename Socket, typename Protocol, typename Handler>
  82 class reactive_socket_accept_op :
  83   public reactive_socket_accept_op_base<Socket, Protocol>
  84 {
  85 public:
  86   BOOST_ASIO_DEFINE_HANDLER_PTR(reactive_socket_accept_op);
  87
  88   reactive_socket_accept_op(socket_type socket,
  89       socket_ops::state_type state, Socket& peer, const Protocol& protocol,
  90       typename Protocol::endpoint* peer_endpoint, Handler& handler)
  91     : reactive_socket_accept_op_base<Socket, Protocol>(socket, state, peer,
  92         protocol, peer_endpoint, &reactive_socket_accept_op::do_complete),
  93       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
  94   {
  95   }
  96
  97   static void do_complete(io_service_impl* owner, operation* base,
  98       const boost::system::error_code& /*ec*/,
  99       std::size_t /*bytes_transferred*/)
 100   {
 101     // Take ownership of the handler object.
 102     reactive_socket_accept_op* o(static_cast<reactive_socket_accept_op*>(base));
 103     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
 104
 105     BOOST_ASIO_HANDLER_COMPLETION((o));
 106
 107     // Make a copy of the handler so that the memory can be deallocated before
 108     // the upcall is made. Even if we're not about to make an upcall, a
 109     // sub-object of the handler may be the true owner of the memory associated
 110     // with the handler. Consequently, a local copy of the handler is required
 111     // to ensure that any owning sub-object remains valid until after we have
 112     // deallocated the memory here.
 113     detail::binder1<Handler, boost::system::error_code>
 114       handler(o->handler_, o->ec_);
 115     p.h = boost::asio::detail::addressof(handler.handler_);
 116     p.reset();
 117
 118     // Make the upcall if required.
 119     if (owner)
 120     {
 121       fenced_block b(fenced_block::half);
 122       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
 123       boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_);
 124       BOOST_ASIO_HANDLER_INVOCATION_END;
 125     }
 126   }
 127
 128 private:
 129   Handler handler_;
 130 };
 131
 132 } // namespace detail
 133 } // namespace asio
 134 } // namespace boost
 135
 136 #include <boost/asio/detail/pop_options.hpp>
 137
 138 #endif // BOOST_ASIO_DETAIL_REACTIVE_SOCKET_ACCEPT_OP_HPP