diff options
Diffstat (limited to 'src/third_party/boost-1.69.0/boost/asio/detail/win_iocp_socket_recvfrom_op.hpp')
-rw-r--r-- | src/third_party/boost-1.69.0/boost/asio/detail/win_iocp_socket_recvfrom_op.hpp | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/boost/asio/detail/win_iocp_socket_recvfrom_op.hpp b/src/third_party/boost-1.69.0/boost/asio/detail/win_iocp_socket_recvfrom_op.hpp new file mode 100644 index 00000000000..a7338c88775 --- /dev/null +++ b/src/third_party/boost-1.69.0/boost/asio/detail/win_iocp_socket_recvfrom_op.hpp @@ -0,0 +1,127 @@ +// +// detail/win_iocp_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_WIN_IOCP_SOCKET_RECVFROM_OP_HPP +#define BOOST_ASIO_DETAIL_WIN_IOCP_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> + +#if defined(BOOST_ASIO_HAS_IOCP) + +#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/handler_alloc_helpers.hpp> +#include <boost/asio/detail/handler_invoke_helpers.hpp> +#include <boost/asio/detail/memory.hpp> +#include <boost/asio/detail/operation.hpp> +#include <boost/asio/detail/socket_ops.hpp> +#include <boost/asio/error.hpp> + +#include <boost/asio/detail/push_options.hpp> + +namespace boost { +namespace asio { +namespace detail { + +template <typename MutableBufferSequence, typename Endpoint, typename Handler> +class win_iocp_socket_recvfrom_op : public operation +{ +public: + BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_recvfrom_op); + + win_iocp_socket_recvfrom_op(Endpoint& endpoint, + socket_ops::weak_cancel_token_type cancel_token, + const MutableBufferSequence& buffers, Handler& handler) + : operation(&win_iocp_socket_recvfrom_op::do_complete), + endpoint_(endpoint), + endpoint_size_(static_cast<int>(endpoint.capacity())), + cancel_token_(cancel_token), + buffers_(buffers), + handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) + { + handler_work<Handler>::start(handler_); + } + + int& endpoint_size() + { + return endpoint_size_; + } + + static void do_complete(void* owner, operation* base, + const boost::system::error_code& result_ec, + std::size_t bytes_transferred) + { + boost::system::error_code ec(result_ec); + + // Take ownership of the operation object. + win_iocp_socket_recvfrom_op* o( + static_cast<win_iocp_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)); + +#if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) + // Check whether buffers are still valid. + if (owner) + { + buffer_sequence_adapter<boost::asio::mutable_buffer, + MutableBufferSequence>::validate(o->buffers_); + } +#endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) + + socket_ops::complete_iocp_recvfrom(o->cancel_token_, ec); + + // Record the size of the endpoint returned by the operation. + o->endpoint_.resize(o->endpoint_size_); + + // 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_, ec, 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: + Endpoint& endpoint_; + int endpoint_size_; + socket_ops::weak_cancel_token_type cancel_token_; + MutableBufferSequence buffers_; + Handler handler_; +}; + +} // namespace detail +} // namespace asio +} // namespace boost + +#include <boost/asio/detail/pop_options.hpp> + +#endif // defined(BOOST_ASIO_HAS_IOCP) + +#endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_RECVFROM_OP_HPP |