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Diffstat (limited to '3rdparty/asio/include/asio/detail/resolve_endpoint_op.hpp')
-rw-r--r-- | 3rdparty/asio/include/asio/detail/resolve_endpoint_op.hpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/3rdparty/asio/include/asio/detail/resolve_endpoint_op.hpp b/3rdparty/asio/include/asio/detail/resolve_endpoint_op.hpp new file mode 100644 index 00000000000..c7cb2c4c101 --- /dev/null +++ b/3rdparty/asio/include/asio/detail/resolve_endpoint_op.hpp @@ -0,0 +1,140 @@ +// +// detail/resolve_endpoint_op.hpp +// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2024 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_RESOLVER_ENDPOINT_OP_HPP +#define ASIO_DETAIL_RESOLVER_ENDPOINT_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/fenced_block.hpp" +#include "asio/detail/handler_alloc_helpers.hpp" +#include "asio/detail/handler_work.hpp" +#include "asio/detail/memory.hpp" +#include "asio/detail/resolve_op.hpp" +#include "asio/detail/socket_ops.hpp" +#include "asio/error.hpp" +#include "asio/ip/basic_resolver_results.hpp" + +#if defined(ASIO_HAS_IOCP) +# include "asio/detail/win_iocp_io_context.hpp" +#else // defined(ASIO_HAS_IOCP) +# include "asio/detail/scheduler.hpp" +#endif // defined(ASIO_HAS_IOCP) + +#include "asio/detail/push_options.hpp" + +namespace asio { +namespace detail { + +template <typename Protocol, typename Handler, typename IoExecutor> +class resolve_endpoint_op : public resolve_op +{ +public: + ASIO_DEFINE_HANDLER_PTR(resolve_endpoint_op); + + typedef typename Protocol::endpoint endpoint_type; + typedef asio::ip::basic_resolver_results<Protocol> results_type; + +#if defined(ASIO_HAS_IOCP) + typedef class win_iocp_io_context scheduler_impl; +#else + typedef class scheduler scheduler_impl; +#endif + + resolve_endpoint_op(socket_ops::weak_cancel_token_type cancel_token, + const endpoint_type& endpoint, scheduler_impl& sched, + Handler& handler, const IoExecutor& io_ex) + : resolve_op(&resolve_endpoint_op::do_complete), + cancel_token_(cancel_token), + endpoint_(endpoint), + scheduler_(sched), + handler_(static_cast<Handler&&>(handler)), + work_(handler_, io_ex) + { + } + + static void do_complete(void* owner, operation* base, + const asio::error_code& /*ec*/, + std::size_t /*bytes_transferred*/) + { + // Take ownership of the operation object. + ASIO_ASSUME(base != 0); + resolve_endpoint_op* o(static_cast<resolve_endpoint_op*>(base)); + ptr p = { asio::detail::addressof(o->handler_), o, o }; + + if (owner && owner != &o->scheduler_) + { + // The operation is being run on the worker io_context. Time to perform + // the resolver operation. + + // Perform the blocking endpoint resolution operation. + char host_name[NI_MAXHOST] = ""; + char service_name[NI_MAXSERV] = ""; + socket_ops::background_getnameinfo(o->cancel_token_, o->endpoint_.data(), + o->endpoint_.size(), host_name, NI_MAXHOST, service_name, NI_MAXSERV, + o->endpoint_.protocol().type(), o->ec_); + o->results_ = results_type::create(o->endpoint_, host_name, service_name); + + // Pass operation back to main io_context for completion. + o->scheduler_.post_deferred_completion(o); + p.v = p.p = 0; + } + else + { + // The operation has been returned to the main io_context. The completion + // handler is ready to be delivered. + + ASIO_HANDLER_COMPLETION((*o)); + + // Take ownership of the operation's outstanding work. + handler_work<Handler, IoExecutor> w( + static_cast<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::binder2<Handler, asio::error_code, results_type> + handler(o->handler_, o->ec_, o->results_); + p.h = asio::detail::addressof(handler.handler_); + p.reset(); + + if (owner) + { + fenced_block b(fenced_block::half); + ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, "...")); + w.complete(handler, handler.handler_); + ASIO_HANDLER_INVOCATION_END; + } + } + } + +private: + socket_ops::weak_cancel_token_type cancel_token_; + endpoint_type endpoint_; + scheduler_impl& scheduler_; + Handler handler_; + handler_work<Handler, IoExecutor> work_; + results_type results_; +}; + +} // namespace detail +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#endif // ASIO_DETAIL_RESOLVER_ENDPOINT_OP_HPP |