1 // 2 // detail/win_iocp_null_buffers_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 BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_OP_HPP 12 #define BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_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/addressof.hpp> 23 #include <boost/asio/detail/bind_handler.hpp> 24 #include <boost/asio/detail/buffer_sequence_adapter.hpp> 25 #include <boost/asio/detail/fenced_block.hpp> 26 #include <boost/asio/detail/handler_alloc_helpers.hpp> 27 #include <boost/asio/detail/handler_invoke_helpers.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_null_buffers_op : public reactor_op 40 { 41 public: 42 BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_null_buffers_op); 43 win_iocp_null_buffers_op(socket_ops::weak_cancel_token_type cancel_token,Handler & handler)44 win_iocp_null_buffers_op(socket_ops::weak_cancel_token_type cancel_token, 45 Handler& handler) 46 : reactor_op(&win_iocp_null_buffers_op::do_perform, 47 &win_iocp_null_buffers_op::do_complete), 48 cancel_token_(cancel_token), 49 handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) 50 { 51 } 52 do_perform(reactor_op *)53 static bool do_perform(reactor_op*) 54 { 55 return true; 56 } 57 do_complete(io_service_impl * owner,operation * base,const boost::system::error_code & result_ec,std::size_t bytes_transferred)58 static void do_complete(io_service_impl* owner, operation* base, 59 const boost::system::error_code& result_ec, 60 std::size_t bytes_transferred) 61 { 62 boost::system::error_code ec(result_ec); 63 64 // Take ownership of the operation object. 65 win_iocp_null_buffers_op* o(static_cast<win_iocp_null_buffers_op*>(base)); 66 ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; 67 68 BOOST_ASIO_HANDLER_COMPLETION((o)); 69 70 // The reactor may have stored a result in the operation object. 71 if (o->ec_) 72 ec = o->ec_; 73 74 // Map non-portable errors to their portable counterparts. 75 if (ec.value() == ERROR_NETNAME_DELETED) 76 { 77 if (o->cancel_token_.expired()) 78 ec = boost::asio::error::operation_aborted; 79 else 80 ec = boost::asio::error::connection_reset; 81 } 82 else if (ec.value() == ERROR_PORT_UNREACHABLE) 83 { 84 ec = boost::asio::error::connection_refused; 85 } 86 87 // Make a copy of the handler so that the memory can be deallocated before 88 // the upcall is made. Even if we're not about to make an upcall, a 89 // sub-object of the handler may be the true owner of the memory associated 90 // with the handler. Consequently, a local copy of the handler is required 91 // to ensure that any owning sub-object remains valid until after we have 92 // deallocated the memory here. 93 detail::binder2<Handler, boost::system::error_code, std::size_t> 94 handler(o->handler_, ec, bytes_transferred); 95 p.h = boost::asio::detail::addressof(handler.handler_); 96 p.reset(); 97 98 // Make the upcall if required. 99 if (owner) 100 { 101 fenced_block b(fenced_block::half); 102 BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); 103 boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); 104 BOOST_ASIO_HANDLER_INVOCATION_END; 105 } 106 } 107 108 private: 109 socket_ops::weak_cancel_token_type cancel_token_; 110 Handler handler_; 111 }; 112 113 } // namespace detail 114 } // namespace asio 115 } // namespace boost 116 117 #include <boost/asio/detail/pop_options.hpp> 118 119 #endif // defined(BOOST_ASIO_HAS_IOCP) 120 121 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_OP_HPP 122