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Diffstat (limited to 'src/third_party/boost-1.69.0/boost/asio/detail/reactive_socket_recvfrom_op.hpp')
-rw-r--r-- | src/third_party/boost-1.69.0/boost/asio/detail/reactive_socket_recvfrom_op.hpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/boost/asio/detail/reactive_socket_recvfrom_op.hpp b/src/third_party/boost-1.69.0/boost/asio/detail/reactive_socket_recvfrom_op.hpp new file mode 100644 index 00000000000..b96a01327a0 --- /dev/null +++ b/src/third_party/boost-1.69.0/boost/asio/detail/reactive_socket_recvfrom_op.hpp @@ -0,0 +1,140 @@ +// +// detail/reactive_socket_recvfrom_op.hpp +// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2018 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 BOOST_ASIO_DETAIL_REACTIVE_SOCKET_RECVFROM_OP_HPP +#define BOOST_ASIO_DETAIL_REACTIVE_SOCKET_RECVFROM_OP_HPP + +#if defined(_MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) + +#include <boost/asio/detail/config.hpp> +#include <boost/asio/detail/bind_handler.hpp> +#include <boost/asio/detail/buffer_sequence_adapter.hpp> +#include <boost/asio/detail/fenced_block.hpp> +#include <boost/asio/detail/memory.hpp> +#include <boost/asio/detail/reactor_op.hpp> +#include <boost/asio/detail/socket_ops.hpp> + +#include <boost/asio/detail/push_options.hpp> + +namespace boost { +namespace asio { +namespace detail { + +template <typename MutableBufferSequence, typename Endpoint> +class reactive_socket_recvfrom_op_base : public reactor_op +{ +public: + reactive_socket_recvfrom_op_base(socket_type socket, int protocol_type, + const MutableBufferSequence& buffers, Endpoint& endpoint, + socket_base::message_flags flags, func_type complete_func) + : reactor_op(&reactive_socket_recvfrom_op_base::do_perform, complete_func), + socket_(socket), + protocol_type_(protocol_type), + buffers_(buffers), + sender_endpoint_(endpoint), + flags_(flags) + { + } + + static status do_perform(reactor_op* base) + { + reactive_socket_recvfrom_op_base* o( + static_cast<reactive_socket_recvfrom_op_base*>(base)); + + buffer_sequence_adapter<boost::asio::mutable_buffer, + MutableBufferSequence> bufs(o->buffers_); + + std::size_t addr_len = o->sender_endpoint_.capacity(); + status result = socket_ops::non_blocking_recvfrom(o->socket_, + bufs.buffers(), bufs.count(), o->flags_, + o->sender_endpoint_.data(), &addr_len, + o->ec_, o->bytes_transferred_) ? done : not_done; + + if (result && !o->ec_) + o->sender_endpoint_.resize(addr_len); + + BOOST_ASIO_HANDLER_REACTOR_OPERATION((*o, "non_blocking_recvfrom", + o->ec_, o->bytes_transferred_)); + + return result; + } + +private: + socket_type socket_; + int protocol_type_; + MutableBufferSequence buffers_; + Endpoint& sender_endpoint_; + socket_base::message_flags flags_; +}; + +template <typename MutableBufferSequence, typename Endpoint, typename Handler> +class reactive_socket_recvfrom_op : + public reactive_socket_recvfrom_op_base<MutableBufferSequence, Endpoint> +{ +public: + BOOST_ASIO_DEFINE_HANDLER_PTR(reactive_socket_recvfrom_op); + + reactive_socket_recvfrom_op(socket_type socket, int protocol_type, + const MutableBufferSequence& buffers, Endpoint& endpoint, + socket_base::message_flags flags, Handler& handler) + : reactive_socket_recvfrom_op_base<MutableBufferSequence, Endpoint>( + socket, protocol_type, buffers, endpoint, flags, + &reactive_socket_recvfrom_op::do_complete), + handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) + { + handler_work<Handler>::start(handler_); + } + + static void do_complete(void* owner, operation* base, + const boost::system::error_code& /*ec*/, + std::size_t /*bytes_transferred*/) + { + // Take ownership of the handler object. + reactive_socket_recvfrom_op* o( + static_cast<reactive_socket_recvfrom_op*>(base)); + ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; + handler_work<Handler> w(o->handler_); + + BOOST_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, boost::system::error_code, std::size_t> + handler(o->handler_, o->ec_, o->bytes_transferred_); + p.h = boost::asio::detail::addressof(handler.handler_); + p.reset(); + + // Make the upcall if required. + if (owner) + { + fenced_block b(fenced_block::half); + BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); + w.complete(handler, handler.handler_); + BOOST_ASIO_HANDLER_INVOCATION_END; + } + } + +private: + Handler handler_; +}; + +} // namespace detail +} // namespace asio +} // namespace boost + +#include <boost/asio/detail/pop_options.hpp> + +#endif // BOOST_ASIO_DETAIL_REACTIVE_SOCKET_RECVFROM_OP_HPP |