asio/detail/io_uring_socket_connect_op.hpp

0001 //
0002 // detail/io_uring_socket_connect_op.hpp
0003 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0004 //
0005 // Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0009 //
0010
0011 #ifndef BOOST_ASIO_DETAIL_IO_URING_SOCKET_CONNECT_OP_HPP
0012 #define BOOST_ASIO_DETAIL_IO_URING_SOCKET_CONNECT_OP_HPP
0013
0014 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
0015 # pragma once
0016 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
0017
0018 #include <boost/asio/detail/config.hpp>
0019
0020 #if defined(BOOST_ASIO_HAS_IO_URING)
0021
0022 #include <boost/asio/detail/bind_handler.hpp>
0023 #include <boost/asio/detail/fenced_block.hpp>
0024 #include <boost/asio/detail/handler_alloc_helpers.hpp>
0025 #include <boost/asio/detail/handler_work.hpp>
0026 #include <boost/asio/detail/io_uring_operation.hpp>
0027 #include <boost/asio/detail/memory.hpp>
0028 #include <boost/asio/detail/socket_ops.hpp>
0029
0030 #include <boost/asio/detail/push_options.hpp>
0031
0032 namespace boost {
0033 namespace asio {
0034 namespace detail {
0035
0036 template <typename Protocol>
0037 class io_uring_socket_connect_op_base : public io_uring_operation
0038 {
0039 public:
0040   io_uring_socket_connect_op_base(const boost::system::error_code& success_ec,
0041       socket_type socket, const typename Protocol::endpoint& endpoint,
0042       func_type complete_func)
0043     : io_uring_operation(success_ec,
0044         &io_uring_socket_connect_op_base::do_prepare,
0045         &io_uring_socket_connect_op_base::do_perform, complete_func),
0046       socket_(socket),
0047       endpoint_(endpoint)
0048   {
0049   }
0050
0051   static void do_prepare(io_uring_operation* base, ::io_uring_sqe* sqe)
0052   {
0053     BOOST_ASIO_ASSUME(base != 0);
0054     io_uring_socket_connect_op_base* o(
0055         static_cast<io_uring_socket_connect_op_base*>(base));
0056
0057     ::io_uring_prep_connect(sqe, o->socket_,
0058         static_cast<sockaddr*>(o->endpoint_.data()),
0059         static_cast<socklen_t>(o->endpoint_.size()));
0060   }
0061
0062   static bool do_perform(io_uring_operation*, bool after_completion)
0063   {
0064     return after_completion;
0065   }
0066
0067 private:
0068   socket_type socket_;
0069   typename Protocol::endpoint endpoint_;
0070 };
0071
0072 template <typename Protocol, typename Handler, typename IoExecutor>
0073 class io_uring_socket_connect_op :
0074   public io_uring_socket_connect_op_base<Protocol>
0075 {
0076 public:
0077   BOOST_ASIO_DEFINE_HANDLER_PTR(io_uring_socket_connect_op);
0078
0079   io_uring_socket_connect_op(const boost::system::error_code& success_ec,
0080       socket_type socket, const typename Protocol::endpoint& endpoint,
0081       Handler& handler, const IoExecutor& io_ex)
0082     : io_uring_socket_connect_op_base<Protocol>(success_ec, socket,
0083         endpoint, &io_uring_socket_connect_op::do_complete),
0084       handler_(static_cast<Handler&&>(handler)),
0085       work_(handler_, io_ex)
0086   {
0087   }
0088
0089   static void do_complete(void* owner, operation* base,
0090       const boost::system::error_code& /*ec*/,
0091       std::size_t /*bytes_transferred*/)
0092   {
0093     // Take ownership of the handler object.
0094     BOOST_ASIO_ASSUME(base != 0);
0095     io_uring_socket_connect_op* o
0096       (static_cast<io_uring_socket_connect_op*>(base));
0097     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
0098
0099     BOOST_ASIO_HANDLER_COMPLETION((*o));
0100
0101     // Take ownership of the operation's outstanding work.
0102     handler_work<Handler, IoExecutor> w(
0103         static_cast<handler_work<Handler, IoExecutor>&&>(
0104           o->work_));
0105
0106     BOOST_ASIO_ERROR_LOCATION(o->ec_);
0107
0108     // Make a copy of the handler so that the memory can be deallocated before
0109     // the upcall is made. Even if we're not about to make an upcall, a
0110     // sub-object of the handler may be the true owner of the memory associated
0111     // with the handler. Consequently, a local copy of the handler is required
0112     // to ensure that any owning sub-object remains valid until after we have
0113     // deallocated the memory here.
0114     detail::binder1<Handler, boost::system::error_code>
0115       handler(o->handler_, o->ec_);
0116     p.h = boost::asio::detail::addressof(handler.handler_);
0117     p.reset();
0118
0119     // Make the upcall if required.
0120     if (owner)
0121     {
0122       fenced_block b(fenced_block::half);
0123       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
0124       w.complete(handler, handler.handler_);
0125       BOOST_ASIO_HANDLER_INVOCATION_END;
0126     }
0127   }
0128
0129 private:
0130   Handler handler_;
0131   handler_work<Handler, IoExecutor> work_;
0132 };
0133
0134 } // namespace detail
0135 } // namespace asio
0136 } // namespace boost
0137
0138 #include <boost/asio/detail/pop_options.hpp>
0139
0140 #endif // defined(BOOST_ASIO_HAS_IO_URING)
0141
0142 #endif // BOOST_ASIO_DETAIL_IO_URING_SOCKET_CONNECT_OP_HPP