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      1 //
      2 // detail/reactive_socket_connect_op.hpp
      3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      4 //
      5 // Copyright (c) 2003-2015 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 ASIO_DETAIL_REACTIVE_SOCKET_CONNECT_OP_HPP
     12 #define ASIO_DETAIL_REACTIVE_SOCKET_CONNECT_OP_HPP
     13 
     14 
     15 #include "asio/detail/config.hpp"
     16 #include "asio/detail/addressof.hpp"
     17 #include "asio/detail/bind_handler.hpp"
     18 #include "asio/detail/buffer_sequence_adapter.hpp"
     19 #include "asio/detail/fenced_block.hpp"
     20 #include "asio/detail/reactor_op.hpp"
     21 #include "asio/detail/socket_ops.hpp"
     22 
     23 #include "asio/detail/push_options.hpp"
     24 
     25 namespace asio {
     26 namespace detail {
     27 
     28 class reactive_socket_connect_op_base : public reactor_op
     29 {
     30 public:
     31   reactive_socket_connect_op_base(socket_type socket, func_type complete_func)
     32     : reactor_op(&reactive_socket_connect_op_base::do_perform, complete_func),
     33       socket_(socket)
     34   {
     35   }
     36 
     37   static bool do_perform(reactor_op* base)
     38   {
     39     reactive_socket_connect_op_base* o(
     40         static_cast<reactive_socket_connect_op_base*>(base));
     41 
     42     return socket_ops::non_blocking_connect(o->socket_, o->ec_);
     43   }
     44 
     45 private:
     46   socket_type socket_;
     47 };
     48 
     49 template <typename Handler>
     50 class reactive_socket_connect_op : public reactive_socket_connect_op_base
     51 {
     52 public:
     53   ASIO_DEFINE_HANDLER_PTR(reactive_socket_connect_op);
     54 
     55   reactive_socket_connect_op(socket_type socket, Handler& handler)
     56     : reactive_socket_connect_op_base(socket,
     57         &reactive_socket_connect_op::do_complete),
     58       handler_(ASIO_MOVE_CAST(Handler)(handler))
     59   {
     60   }
     61 
     62   static void do_complete(io_service_impl* owner, operation* base,
     63       const asio::error_code& /*ec*/,
     64       std::size_t /*bytes_transferred*/)
     65   {
     66     // Take ownership of the handler object.
     67     reactive_socket_connect_op* o
     68       (static_cast<reactive_socket_connect_op*>(base));
     69     ptr p = { asio::detail::addressof(o->handler_), o, o };
     70 
     71     ASIO_HANDLER_COMPLETION((o));
     72 
     73     // Make a copy of the handler so that the memory can be deallocated before
     74     // the upcall is made. Even if we're not about to make an upcall, a
     75     // sub-object of the handler may be the true owner of the memory associated
     76     // with the handler. Consequently, a local copy of the handler is required
     77     // to ensure that any owning sub-object remains valid until after we have
     78     // deallocated the memory here.
     79     detail::binder1<Handler, asio::error_code>
     80       handler(o->handler_, o->ec_);
     81     p.h = asio::detail::addressof(handler.handler_);
     82     p.reset();
     83 
     84     // Make the upcall if required.
     85     if (owner)
     86     {
     87       fenced_block b(fenced_block::half);
     88       ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
     89       asio_handler_invoke_helpers::invoke(handler, handler);
     90       ASIO_HANDLER_INVOCATION_END;
     91     }
     92   }
     93 
     94 private:
     95   Handler handler_;
     96 };
     97 
     98 } // namespace detail
     99 } // namespace asio
    100 
    101 #include "asio/detail/pop_options.hpp"
    102 
    103 #endif // ASIO_DETAIL_REACTIVE_SOCKET_CONNECT_OP_HPP
    104