| // |
| // detail/reactive_socket_sendto_op.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| |
| #ifndef ASIO_DETAIL_REACTIVE_SOCKET_SENDTO_OP_HPP |
| #define ASIO_DETAIL_REACTIVE_SOCKET_SENDTO_OP_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #include "asio/detail/bind_handler.hpp" |
| #include "asio/detail/buffer_sequence_adapter.hpp" |
| #include "asio/detail/fenced_block.hpp" |
| #include "asio/detail/memory.hpp" |
| #include "asio/detail/reactor_op.hpp" |
| #include "asio/detail/socket_ops.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| template <typename ConstBufferSequence, typename Endpoint> |
| class reactive_socket_sendto_op_base : public reactor_op |
| { |
| public: |
| reactive_socket_sendto_op_base(socket_type socket, |
| const ConstBufferSequence& buffers, const Endpoint& endpoint, |
| socket_base::message_flags flags, func_type complete_func) |
| : reactor_op(&reactive_socket_sendto_op_base::do_perform, complete_func), |
| socket_(socket), |
| buffers_(buffers), |
| destination_(endpoint), |
| flags_(flags) |
| { |
| } |
| |
| static status do_perform(reactor_op* base) |
| { |
| reactive_socket_sendto_op_base* o( |
| static_cast<reactive_socket_sendto_op_base*>(base)); |
| |
| buffer_sequence_adapter<asio::const_buffer, |
| ConstBufferSequence> bufs(o->buffers_); |
| |
| status result = socket_ops::non_blocking_sendto(o->socket_, |
| bufs.buffers(), bufs.count(), o->flags_, |
| o->destination_.data(), o->destination_.size(), |
| o->ec_, o->bytes_transferred_) ? done : not_done; |
| |
| ASIO_HANDLER_REACTOR_OPERATION((*o, "non_blocking_sendto", |
| o->ec_, o->bytes_transferred_)); |
| |
| return result; |
| } |
| |
| private: |
| socket_type socket_; |
| ConstBufferSequence buffers_; |
| Endpoint destination_; |
| socket_base::message_flags flags_; |
| }; |
| |
| template <typename ConstBufferSequence, typename Endpoint, typename Handler> |
| class reactive_socket_sendto_op : |
| public reactive_socket_sendto_op_base<ConstBufferSequence, Endpoint> |
| { |
| public: |
| ASIO_DEFINE_HANDLER_PTR(reactive_socket_sendto_op); |
| |
| reactive_socket_sendto_op(socket_type socket, |
| const ConstBufferSequence& buffers, const Endpoint& endpoint, |
| socket_base::message_flags flags, Handler& handler) |
| : reactive_socket_sendto_op_base<ConstBufferSequence, Endpoint>(socket, |
| buffers, endpoint, flags, &reactive_socket_sendto_op::do_complete), |
| handler_(ASIO_MOVE_CAST(Handler)(handler)) |
| { |
| handler_work<Handler>::start(handler_); |
| } |
| |
| static void do_complete(void* owner, operation* base, |
| const asio::error_code& /*ec*/, |
| std::size_t /*bytes_transferred*/) |
| { |
| // Take ownership of the handler object. |
| reactive_socket_sendto_op* o(static_cast<reactive_socket_sendto_op*>(base)); |
| ptr p = { asio::detail::addressof(o->handler_), o, o }; |
| handler_work<Handler> w(o->handler_); |
| |
| ASIO_HANDLER_COMPLETION((*o)); |
| |
| // Make a copy of the handler so that the memory can be deallocated before |
| // the upcall is made. Even if we're not about to make an upcall, a |
| // sub-object of the handler may be the true owner of the memory associated |
| // with the handler. Consequently, a local copy of the handler is required |
| // to ensure that any owning sub-object remains valid until after we have |
| // deallocated the memory here. |
| detail::binder2<Handler, asio::error_code, std::size_t> |
| handler(o->handler_, o->ec_, o->bytes_transferred_); |
| p.h = asio::detail::addressof(handler.handler_); |
| p.reset(); |
| |
| // Make the upcall if required. |
| if (owner) |
| { |
| fenced_block b(fenced_block::half); |
| ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); |
| w.complete(handler, handler.handler_); |
| ASIO_HANDLER_INVOCATION_END; |
| } |
| } |
| |
| private: |
| Handler handler_; |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // ASIO_DETAIL_REACTIVE_SOCKET_SENDTO_OP_HPP |