Swift
summaryrefslogtreecommitdiffstats
path: root/3rdParty/Boost/boost/asio/detail/resolver_service.hpp
diff options
context:
space:
mode:
authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/asio/detail/resolver_service.hpp
downloadswift-contrib-2812bddd81f8a1b804c7460f4e14cd0aa393d129.zip
swift-contrib-2812bddd81f8a1b804c7460f4e14cd0aa393d129.tar.bz2
Import.
Diffstat (limited to '3rdParty/Boost/boost/asio/detail/resolver_service.hpp')
-rw-r--r--3rdParty/Boost/boost/asio/detail/resolver_service.hpp359
1 files changed, 359 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/asio/detail/resolver_service.hpp b/3rdParty/Boost/boost/asio/detail/resolver_service.hpp
new file mode 100644
index 0000000..9b0aac9
--- /dev/null
+++ b/3rdParty/Boost/boost/asio/detail/resolver_service.hpp
@@ -0,0 +1,359 @@
+//
+// resolver_service.hpp
+// ~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2008 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_RESOLVER_SERVICE_HPP
+#define BOOST_ASIO_DETAIL_RESOLVER_SERVICE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/push_options.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+#include <cstring>
+#include <boost/scoped_ptr.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/asio/detail/pop_options.hpp>
+
+#include <boost/asio/error.hpp>
+#include <boost/asio/io_service.hpp>
+#include <boost/asio/detail/bind_handler.hpp>
+#include <boost/asio/detail/mutex.hpp>
+#include <boost/asio/detail/noncopyable.hpp>
+#include <boost/asio/detail/service_base.hpp>
+#include <boost/asio/detail/socket_ops.hpp>
+#include <boost/asio/detail/socket_types.hpp>
+#include <boost/asio/detail/thread.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+template <typename Protocol>
+class resolver_service
+ : public boost::asio::detail::service_base<resolver_service<Protocol> >
+{
+private:
+ // Helper class to perform exception-safe cleanup of addrinfo objects.
+ class auto_addrinfo
+ : private boost::asio::detail::noncopyable
+ {
+ public:
+ explicit auto_addrinfo(boost::asio::detail::addrinfo_type* ai)
+ : ai_(ai)
+ {
+ }
+
+ ~auto_addrinfo()
+ {
+ if (ai_)
+ socket_ops::freeaddrinfo(ai_);
+ }
+
+ operator boost::asio::detail::addrinfo_type*()
+ {
+ return ai_;
+ }
+
+ private:
+ boost::asio::detail::addrinfo_type* ai_;
+ };
+
+public:
+ // The implementation type of the resolver. The shared pointer is used as a
+ // cancellation token to indicate to the background thread that the operation
+ // has been cancelled.
+ typedef boost::shared_ptr<void> implementation_type;
+ struct noop_deleter { void operator()(void*) {} };
+
+ // The endpoint type.
+ typedef typename Protocol::endpoint endpoint_type;
+
+ // The query type.
+ typedef typename Protocol::resolver_query query_type;
+
+ // The iterator type.
+ typedef typename Protocol::resolver_iterator iterator_type;
+
+ // Constructor.
+ resolver_service(boost::asio::io_service& io_service)
+ : boost::asio::detail::service_base<
+ resolver_service<Protocol> >(io_service),
+ mutex_(),
+ work_io_service_(new boost::asio::io_service),
+ work_(new boost::asio::io_service::work(*work_io_service_)),
+ work_thread_(0)
+ {
+ }
+
+ // Destructor.
+ ~resolver_service()
+ {
+ shutdown_service();
+ }
+
+ // Destroy all user-defined handler objects owned by the service.
+ void shutdown_service()
+ {
+ work_.reset();
+ if (work_io_service_)
+ {
+ work_io_service_->stop();
+ if (work_thread_)
+ {
+ work_thread_->join();
+ work_thread_.reset();
+ }
+ work_io_service_.reset();
+ }
+ }
+
+ // Construct a new resolver implementation.
+ void construct(implementation_type& impl)
+ {
+ impl.reset(static_cast<void*>(0), noop_deleter());
+ }
+
+ // Destroy a resolver implementation.
+ void destroy(implementation_type&)
+ {
+ }
+
+ // Cancel pending asynchronous operations.
+ void cancel(implementation_type& impl)
+ {
+ impl.reset(static_cast<void*>(0), noop_deleter());
+ }
+
+ // Resolve a query to a list of entries.
+ iterator_type resolve(implementation_type&, const query_type& query,
+ boost::system::error_code& ec)
+ {
+ boost::asio::detail::addrinfo_type* address_info = 0;
+ std::string host_name = query.host_name();
+ std::string service_name = query.service_name();
+ boost::asio::detail::addrinfo_type hints = query.hints();
+
+ socket_ops::getaddrinfo(host_name.length() ? host_name.c_str() : 0,
+ service_name.c_str(), &hints, &address_info, ec);
+ auto_addrinfo auto_address_info(address_info);
+
+ if (ec)
+ return iterator_type();
+
+ return iterator_type::create(address_info, host_name, service_name);
+ }
+
+ template <typename Handler>
+ class resolve_query_handler
+ {
+ public:
+ resolve_query_handler(implementation_type impl, const query_type& query,
+ boost::asio::io_service& io_service, Handler handler)
+ : impl_(impl),
+ query_(query),
+ io_service_(io_service),
+ work_(io_service),
+ handler_(handler)
+ {
+ }
+
+ void operator()()
+ {
+ // Check if the operation has been cancelled.
+ if (impl_.expired())
+ {
+ iterator_type iterator;
+ io_service_.post(boost::asio::detail::bind_handler(handler_,
+ boost::asio::error::operation_aborted, iterator));
+ return;
+ }
+
+ // Perform the blocking host resolution operation.
+ boost::asio::detail::addrinfo_type* address_info = 0;
+ std::string host_name = query_.host_name();
+ std::string service_name = query_.service_name();
+ boost::asio::detail::addrinfo_type hints = query_.hints();
+ boost::system::error_code ec;
+ socket_ops::getaddrinfo(host_name.length() ? host_name.c_str() : 0,
+ service_name.c_str(), &hints, &address_info, ec);
+ auto_addrinfo auto_address_info(address_info);
+
+ // Invoke the handler and pass the result.
+ iterator_type iterator;
+ if (!ec)
+ iterator = iterator_type::create(address_info, host_name, service_name);
+ io_service_.post(boost::asio::detail::bind_handler(
+ handler_, ec, iterator));
+ }
+
+ private:
+ boost::weak_ptr<void> impl_;
+ query_type query_;
+ boost::asio::io_service& io_service_;
+ boost::asio::io_service::work work_;
+ Handler handler_;
+ };
+
+ // Asynchronously resolve a query to a list of entries.
+ template <typename Handler>
+ void async_resolve(implementation_type& impl, const query_type& query,
+ Handler handler)
+ {
+ if (work_io_service_)
+ {
+ start_work_thread();
+ work_io_service_->post(
+ resolve_query_handler<Handler>(
+ impl, query, this->get_io_service(), handler));
+ }
+ }
+
+ // Resolve an endpoint to a list of entries.
+ iterator_type resolve(implementation_type&,
+ const endpoint_type& endpoint, boost::system::error_code& ec)
+ {
+ // First try resolving with the service name. If that fails try resolving
+ // but allow the service to be returned as a number.
+ char host_name[NI_MAXHOST];
+ char service_name[NI_MAXSERV];
+ int flags = endpoint.protocol().type() == SOCK_DGRAM ? NI_DGRAM : 0;
+ socket_ops::getnameinfo(endpoint.data(), endpoint.size(),
+ host_name, NI_MAXHOST, service_name, NI_MAXSERV, flags, ec);
+ if (ec)
+ {
+ flags |= NI_NUMERICSERV;
+ socket_ops::getnameinfo(endpoint.data(), endpoint.size(),
+ host_name, NI_MAXHOST, service_name, NI_MAXSERV, flags, ec);
+ }
+
+ if (ec)
+ return iterator_type();
+
+ return iterator_type::create(endpoint, host_name, service_name);
+ }
+
+ template <typename Handler>
+ class resolve_endpoint_handler
+ {
+ public:
+ resolve_endpoint_handler(implementation_type impl,
+ const endpoint_type& endpoint, boost::asio::io_service& io_service,
+ Handler handler)
+ : impl_(impl),
+ endpoint_(endpoint),
+ io_service_(io_service),
+ work_(io_service),
+ handler_(handler)
+ {
+ }
+
+ void operator()()
+ {
+ // Check if the operation has been cancelled.
+ if (impl_.expired())
+ {
+ iterator_type iterator;
+ io_service_.post(boost::asio::detail::bind_handler(handler_,
+ boost::asio::error::operation_aborted, iterator));
+ return;
+ }
+
+
+ // First try resolving with the service name. If that fails try resolving
+ // but allow the service to be returned as a number.
+ char host_name[NI_MAXHOST];
+ char service_name[NI_MAXSERV];
+ int flags = endpoint_.protocol().type() == SOCK_DGRAM ? NI_DGRAM : 0;
+ boost::system::error_code ec;
+ socket_ops::getnameinfo(endpoint_.data(), endpoint_.size(),
+ host_name, NI_MAXHOST, service_name, NI_MAXSERV, flags, ec);
+ if (ec)
+ {
+ flags |= NI_NUMERICSERV;
+ socket_ops::getnameinfo(endpoint_.data(), endpoint_.size(),
+ host_name, NI_MAXHOST, service_name, NI_MAXSERV, flags, ec);
+ }
+
+ // Invoke the handler and pass the result.
+ iterator_type iterator;
+ if (!ec)
+ iterator = iterator_type::create(endpoint_, host_name, service_name);
+ io_service_.post(boost::asio::detail::bind_handler(
+ handler_, ec, iterator));
+ }
+
+ private:
+ boost::weak_ptr<void> impl_;
+ endpoint_type endpoint_;
+ boost::asio::io_service& io_service_;
+ boost::asio::io_service::work work_;
+ Handler handler_;
+ };
+
+ // Asynchronously resolve an endpoint to a list of entries.
+ template <typename Handler>
+ void async_resolve(implementation_type& impl, const endpoint_type& endpoint,
+ Handler handler)
+ {
+ if (work_io_service_)
+ {
+ start_work_thread();
+ work_io_service_->post(
+ resolve_endpoint_handler<Handler>(
+ impl, endpoint, this->get_io_service(), handler));
+ }
+ }
+
+private:
+ // Helper class to run the work io_service in a thread.
+ class work_io_service_runner
+ {
+ public:
+ work_io_service_runner(boost::asio::io_service& io_service)
+ : io_service_(io_service) {}
+ void operator()() { io_service_.run(); }
+ private:
+ boost::asio::io_service& io_service_;
+ };
+
+ // Start the work thread if it's not already running.
+ void start_work_thread()
+ {
+ boost::asio::detail::mutex::scoped_lock lock(mutex_);
+ if (!work_thread_)
+ {
+ work_thread_.reset(new boost::asio::detail::thread(
+ work_io_service_runner(*work_io_service_)));
+ }
+ }
+
+ // Mutex to protect access to internal data.
+ boost::asio::detail::mutex mutex_;
+
+ // Private io_service used for performing asynchronous host resolution.
+ boost::scoped_ptr<boost::asio::io_service> work_io_service_;
+
+ // Work for the private io_service to perform.
+ boost::scoped_ptr<boost::asio::io_service::work> work_;
+
+ // Thread used for running the work io_service's run loop.
+ boost::scoped_ptr<boost::asio::detail::thread> work_thread_;
+};
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_RESOLVER_SERVICE_HPP