整理

include/boost/asio/detail/resolver_service_base.hpp

@@ -0,0 +1,127 @@
+//
+// detail/resolver_service_base.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2025 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_BASE_HPP
+#define BOOST_ASIO_DETAIL_RESOLVER_SERVICE_BASE_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/error.hpp>
+#include <boost/asio/execution_context.hpp>
+#include <boost/asio/detail/noncopyable.hpp>
+#include <boost/asio/detail/resolve_op.hpp>
+#include <boost/asio/detail/resolver_thread_pool.hpp>
+#include <boost/asio/detail/socket_ops.hpp>
+#include <boost/asio/detail/socket_types.hpp>
+
+#if defined(BOOST_ASIO_HAS_IOCP)
+# include <boost/asio/detail/win_iocp_io_context.hpp>
+#else // defined(BOOST_ASIO_HAS_IOCP)
+# include <boost/asio/detail/scheduler.hpp>
+#endif // defined(BOOST_ASIO_HAS_IOCP)
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+class resolver_service_base
+{
+public:
+  // The implementation type of the resolver. A cancellation token is used to
+  // indicate to the background thread that the operation has been cancelled.
+  typedef socket_ops::shared_cancel_token_type implementation_type;
+
+  // Constructor.
+  BOOST_ASIO_DECL resolver_service_base(execution_context& context);
+
+  // Destructor.
+  BOOST_ASIO_DECL ~resolver_service_base();
+
+  // Construct a new resolver implementation.
+  BOOST_ASIO_DECL void construct(implementation_type& impl);
+
+  // Destroy a resolver implementation.
+  BOOST_ASIO_DECL void destroy(implementation_type&);
+
+  // Move-construct a new resolver implementation.
+  BOOST_ASIO_DECL void move_construct(implementation_type& impl,
+      implementation_type& other_impl);
+
+  // Move-assign from another resolver implementation.
+  BOOST_ASIO_DECL void move_assign(implementation_type& impl,
+      resolver_service_base& other_service,
+      implementation_type& other_impl);
+
+  // Move-construct a new timer implementation.
+  void converting_move_construct(implementation_type& impl,
+      resolver_service_base&, implementation_type& other_impl)
+  {
+    move_construct(impl, other_impl);
+  }
+
+  // Move-assign from another timer implementation.
+  void converting_move_assign(implementation_type& impl,
+      resolver_service_base& other_service,
+      implementation_type& other_impl)
+  {
+    move_assign(impl, other_service, other_impl);
+  }
+
+  // Cancel pending asynchronous operations.
+  BOOST_ASIO_DECL void cancel(implementation_type& impl);
+
+protected:
+#if !defined(BOOST_ASIO_WINDOWS_RUNTIME)
+  // 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_;
+  };
+#endif // !defined(BOOST_ASIO_WINDOWS_RUNTIME)
+
+  // Private thread pool used for performing asynchronous host resolution.
+  resolver_thread_pool& thread_pool_;
+};
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#if defined(BOOST_ASIO_HEADER_ONLY)
+# include <boost/asio/detail/impl/resolver_service_base.ipp>
+#endif // defined(BOOST_ASIO_HEADER_ONLY)
+
+#endif // BOOST_ASIO_DETAIL_RESOLVER_SERVICE_BASE_HPP