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+//
+// detail/reactive_socket_recv_op_ext_local.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+// Copyright (c) 2019 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+//
+// 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_RECV_OP_EXT_LOCAL_HPP
+#define BOOST_ASIO_DETAIL_REACTIVE_SOCKET_RECV_OP_EXT_LOCAL_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/handler_alloc_helpers.hpp>
+#include <boost/asio/detail/handler_invoke_helpers.hpp>
+#include <boost/asio/detail/handler_work.hpp>
+#include <boost/asio/detail/memory.hpp>
+#include <boost/asio/detail/reactor_op_ext_local.hpp>
+#include <boost/asio/detail/socket_ops_ext_local.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+template <typename MutableBufferSequence>
+class reactive_socket_recv_op_base_ext_local : public reactor_op_ext_local
+{
+public:
+ reactive_socket_recv_op_base_ext_local(const boost::system::error_code& success_ec,
+ socket_type socket, socket_ops::state_type state,
+ const MutableBufferSequence& buffers,
+ socket_base::message_flags flags, func_type complete_func)
+ : reactor_op_ext_local(success_ec, &reactive_socket_recv_op_base_ext_local::do_perform, complete_func),
+ socket_(socket),
+ state_(state),
+ buffers_(buffers),
+ flags_(flags)
+ {
+ }
+
+ static status do_perform(reactor_op* base)
+ {
+ reactive_socket_recv_op_base_ext_local* o(
+ static_cast<reactive_socket_recv_op_base_ext_local*>(base));
+
+ typedef buffer_sequence_adapter<boost::asio::mutable_buffer,
+ MutableBufferSequence> bufs_type;
+
+ status result;
+ if (bufs_type::is_single_buffer)
+ {
+ result = socket_ops::non_blocking_recv1(o->socket_,
+ bufs_type::first(o->buffers_).data(),
+ bufs_type::first(o->buffers_).size(), o->flags_,
+ (o->state_ & socket_ops::stream_oriented) != 0,
+ o->ec_, o->bytes_transferred_) ? done : not_done;
+ }
+ else
+ {
+ bufs_type bufs(o->buffers_);
+ result = socket_ops::non_blocking_recv(o->socket_,
+ bufs.buffers(), bufs.count(), o->flags_,
+ (o->state_ & socket_ops::stream_oriented) != 0,
+ o->ec_, o->bytes_transferred_) ? done : not_done;
+ }
+
+ if (result == done)
+ if ((o->state_ & socket_ops::stream_oriented) != 0)
+ if (o->bytes_transferred_ == 0)
+ result = done_and_exhausted;
+
+ BOOST_ASIO_HANDLER_REACTOR_OPERATION((*o, "non_blocking_recv",
+ o->ec_, o->bytes_transferred_));
+
+ return result;
+ }
+
+private:
+ socket_type socket_;
+ socket_ops::state_type state_;
+ MutableBufferSequence buffers_;
+ socket_base::message_flags flags_;
+};
+
+template <typename MutableBufferSequence, typename Handler, typename IoExecutor>
+class reactive_socket_recv_op_ext_local :
+ public reactive_socket_recv_op_base_ext_local<MutableBufferSequence>
+{
+public:
+ BOOST_ASIO_DEFINE_HANDLER_PTR(reactive_socket_recv_op_ext_local);
+
+ reactive_socket_recv_op_ext_local(const boost::system::error_code& success_ec,
+ socket_type socket, socket_ops::state_type state,
+ const MutableBufferSequence& buffers, socket_base::message_flags flags,
+ Handler& handler, const IoExecutor& io_ex)
+ : reactive_socket_recv_op_base_ext_local<MutableBufferSequence>(success_ec,
+ socket, state, buffers, flags,
+ &reactive_socket_recv_op_ext_local::do_complete),
+ handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)),
+ work_(handler_, io_ex)
+ {
+ }
+
+ 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_recv_op_ext_local* o(static_cast<reactive_socket_recv_op_ext_local*>(base));
+ ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
+
+ BOOST_ASIO_HANDLER_COMPLETION((*o));
+
+ // Take ownership of the operation's outstanding work.
+ handler_work<Handler, IoExecutor> w(
+ BOOST_ASIO_MOVE_CAST2(handler_work<Handler, IoExecutor>)(
+ o->work_));
+
+ // 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::binder4<Handler, boost::system::error_code, std::size_t, std::uint32_t, std::uint32_t>
+ handler(o->handler_, o->ec_, o->bytes_transferred_, o->uid_, o->gid_);
+ 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_, handler.arg3, handler.arg4));
+ w.complete(handler, handler.handler_);
+ BOOST_ASIO_HANDLER_INVOCATION_END;
+ }
+ }
+
+private:
+ Handler handler_;
+ handler_work<Handler, IoExecutor> work_;
+};
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_REACTIVE_SOCKET_RECV_OP_EXT_LOCAL_HPP