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authorMatthias P. Braendli <matthias.braendli@mpb.li>2019-10-07 04:52:50 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2019-10-07 04:52:50 +0200
commit0aa6201a490bfabc0ae021ceb9f1fb0f46727c5d (patch)
treea71d934d8151dd43e7c16555fef17fd749c5da70 /lib/asio/detail/resolve_query_op.hpp
parent558d74bffd9f069955af52c0b308a1d6169bcff0 (diff)
parent0330221d51421caa110b8c5dcb567cc3d0620eb9 (diff)
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Merge lime output into next branch
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-//
-// detail/resolve_query_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 ASIO_DETAIL_RESOLVE_QUERY_OP_HPP
-#define ASIO_DETAIL_RESOLVE_QUERY_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/error.hpp"
-#include "asio/io_context.hpp"
-#include "asio/ip/basic_resolver_query.hpp"
-#include "asio/ip/basic_resolver_results.hpp"
-#include "asio/detail/bind_handler.hpp"
-#include "asio/detail/fenced_block.hpp"
-#include "asio/detail/handler_alloc_helpers.hpp"
-#include "asio/detail/handler_invoke_helpers.hpp"
-#include "asio/detail/memory.hpp"
-#include "asio/detail/resolve_op.hpp"
-#include "asio/detail/socket_ops.hpp"
-
-#include "asio/detail/push_options.hpp"
-
-namespace asio {
-namespace detail {
-
-template <typename Protocol, typename Handler>
-class resolve_query_op : public resolve_op
-{
-public:
- ASIO_DEFINE_HANDLER_PTR(resolve_query_op);
-
- typedef asio::ip::basic_resolver_query<Protocol> query_type;
- typedef asio::ip::basic_resolver_results<Protocol> results_type;
-
- resolve_query_op(socket_ops::weak_cancel_token_type cancel_token,
- const query_type& query, io_context_impl& ioc, Handler& handler)
- : resolve_op(&resolve_query_op::do_complete),
- cancel_token_(cancel_token),
- query_(query),
- io_context_impl_(ioc),
- handler_(ASIO_MOVE_CAST(Handler)(handler)),
- addrinfo_(0)
- {
- handler_work<Handler>::start(handler_);
- }
-
- ~resolve_query_op()
- {
- if (addrinfo_)
- socket_ops::freeaddrinfo(addrinfo_);
- }
-
- static void do_complete(void* owner, operation* base,
- const asio::error_code& /*ec*/,
- std::size_t /*bytes_transferred*/)
- {
- // Take ownership of the operation object.
- resolve_query_op* o(static_cast<resolve_query_op*>(base));
- ptr p = { asio::detail::addressof(o->handler_), o, o };
-
- if (owner && owner != &o->io_context_impl_)
- {
- // The operation is being run on the worker io_context. Time to perform
- // the resolver operation.
-
- // Perform the blocking host resolution operation.
- socket_ops::background_getaddrinfo(o->cancel_token_,
- o->query_.host_name().c_str(), o->query_.service_name().c_str(),
- o->query_.hints(), &o->addrinfo_, o->ec_);
-
- // Pass operation back to main io_context for completion.
- o->io_context_impl_.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.
-
- // Take ownership of the operation's outstanding work.
- 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, results_type>
- handler(o->handler_, o->ec_, results_type());
- p.h = asio::detail::addressof(handler.handler_);
- if (o->addrinfo_)
- {
- handler.arg2_ = results_type::create(o->addrinfo_,
- o->query_.host_name(), o->query_.service_name());
- }
- 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_;
- query_type query_;
- io_context_impl& io_context_impl_;
- Handler handler_;
- asio::detail::addrinfo_type* addrinfo_;
-};
-
-} // namespace detail
-} // namespace asio
-
-#include "asio/detail/pop_options.hpp"
-
-#endif // ASIO_DETAIL_RESOLVE_QUERY_OP_HPP