1 // 2 // detail/win_iocp_handle_write_op.hpp 3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) 6 // Copyright (c) 2008 Rep Invariant Systems, Inc. (info@repinvariant.com) 7 // 8 // Distributed under the Boost Software License, Version 1.0. (See accompanying 9 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 10 // 11 12 #ifndef BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_WRITE_OP_HPP 13 #define BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_WRITE_OP_HPP 14 15 #if defined(_MSC_VER) && (_MSC_VER >= 1200) 16 # pragma once 17 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) 18 19 #include <boost/asio/detail/config.hpp> 20 21 #if defined(BOOST_ASIO_HAS_IOCP) 22 23 #include <boost/asio/error.hpp> 24 #include <boost/asio/detail/addressof.hpp> 25 #include <boost/asio/detail/bind_handler.hpp> 26 #include <boost/asio/detail/buffer_sequence_adapter.hpp> 27 #include <boost/asio/detail/fenced_block.hpp> 28 #include <boost/asio/detail/handler_alloc_helpers.hpp> 29 #include <boost/asio/detail/handler_invoke_helpers.hpp> 30 #include <boost/asio/detail/operation.hpp> 31 32 #include <boost/asio/detail/push_options.hpp> 33 34 namespace boost { 35 namespace asio { 36 namespace detail { 37 38 template <typename ConstBufferSequence, typename Handler> 39 class win_iocp_handle_write_op : public operation 40 { 41 public: 42 BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_handle_write_op); 43 win_iocp_handle_write_op(const ConstBufferSequence & buffers,Handler & handler)44 win_iocp_handle_write_op(const ConstBufferSequence& buffers, Handler& handler) 45 : operation(&win_iocp_handle_write_op::do_complete), 46 buffers_(buffers), 47 handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) 48 { 49 } 50 do_complete(io_service_impl * owner,operation * base,const boost::system::error_code & ec,std::size_t bytes_transferred)51 static void do_complete(io_service_impl* owner, operation* base, 52 const boost::system::error_code& ec, std::size_t bytes_transferred) 53 { 54 // Take ownership of the operation object. 55 win_iocp_handle_write_op* o(static_cast<win_iocp_handle_write_op*>(base)); 56 ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; 57 58 BOOST_ASIO_HANDLER_COMPLETION((o)); 59 60 #if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) 61 if (owner) 62 { 63 // Check whether buffers are still valid. 64 buffer_sequence_adapter<boost::asio::const_buffer, 65 ConstBufferSequence>::validate(o->buffers_); 66 } 67 #endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) 68 69 // Make a copy of the handler so that the memory can be deallocated before 70 // the upcall is made. Even if we're not about to make an upcall, a 71 // sub-object of the handler may be the true owner of the memory associated 72 // with the handler. Consequently, a local copy of the handler is required 73 // to ensure that any owning sub-object remains valid until after we have 74 // deallocated the memory here. 75 detail::binder2<Handler, boost::system::error_code, std::size_t> 76 handler(o->handler_, ec, bytes_transferred); 77 p.h = boost::asio::detail::addressof(handler.handler_); 78 p.reset(); 79 80 // Make the upcall if required. 81 if (owner) 82 { 83 fenced_block b(fenced_block::half); 84 BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); 85 boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); 86 BOOST_ASIO_HANDLER_INVOCATION_END; 87 } 88 } 89 90 private: 91 ConstBufferSequence buffers_; 92 Handler handler_; 93 }; 94 95 } // namespace detail 96 } // namespace asio 97 } // namespace boost 98 99 #include <boost/asio/detail/pop_options.hpp> 100 101 #endif // defined(BOOST_ASIO_HAS_IOCP) 102 103 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_WRITE_OP_HPP 104