Added thirdparty: boost library

thirdparty/include/boost/asio/detail/impl/resolver_service_base.ipp

@@ -0,0 +1,160 @@
+//
+// detail/impl/resolver_service_base.ipp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2023 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_IMPL_RESOLVER_SERVICE_BASE_IPP
+#define BOOST_ASIO_DETAIL_IMPL_RESOLVER_SERVICE_BASE_IPP
+
+#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/resolver_service_base.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+class resolver_service_base::work_scheduler_runner
+{
+public:
+  work_scheduler_runner(scheduler_impl& work_scheduler)
+    : work_scheduler_(work_scheduler)
+  {
+  }
+
+  void operator()()
+  {
+    boost::system::error_code ec;
+    work_scheduler_.run(ec);
+  }
+
+private:
+  scheduler_impl& work_scheduler_;
+};
+
+resolver_service_base::resolver_service_base(execution_context& context)
+  : scheduler_(boost::asio::use_service<scheduler_impl>(context)),
+    work_scheduler_(new scheduler_impl(context, -1, false)),
+    work_thread_(0)
+{
+  work_scheduler_->work_started();
+}
+
+resolver_service_base::~resolver_service_base()
+{
+  base_shutdown();
+}
+
+void resolver_service_base::base_shutdown()
+{
+  if (work_scheduler_.get())
+  {
+    work_scheduler_->work_finished();
+    work_scheduler_->stop();
+    if (work_thread_.get())
+    {
+      work_thread_->join();
+      work_thread_.reset();
+    }
+    work_scheduler_.reset();
+  }
+}
+
+void resolver_service_base::base_notify_fork(
+    execution_context::fork_event fork_ev)
+{
+  if (work_thread_.get())
+  {
+    if (fork_ev == execution_context::fork_prepare)
+    {
+      work_scheduler_->stop();
+      work_thread_->join();
+      work_thread_.reset();
+    }
+  }
+  else if (fork_ev != execution_context::fork_prepare)
+  {
+    work_scheduler_->restart();
+  }
+}
+
+void resolver_service_base::construct(
+    resolver_service_base::implementation_type& impl)
+{
+  impl.reset(static_cast<void*>(0), socket_ops::noop_deleter());
+}
+
+void resolver_service_base::destroy(
+    resolver_service_base::implementation_type& impl)
+{
+  BOOST_ASIO_HANDLER_OPERATION((scheduler_.context(),
+        "resolver", &impl, 0, "cancel"));
+
+  impl.reset();
+}
+
+void resolver_service_base::move_construct(implementation_type& impl,
+    implementation_type& other_impl)
+{
+  impl = static_cast<implementation_type&&>(other_impl);
+}
+
+void resolver_service_base::move_assign(implementation_type& impl,
+    resolver_service_base&, implementation_type& other_impl)
+{
+  destroy(impl);
+  impl = static_cast<implementation_type&&>(other_impl);
+}
+
+void resolver_service_base::cancel(
+    resolver_service_base::implementation_type& impl)
+{
+  BOOST_ASIO_HANDLER_OPERATION((scheduler_.context(),
+        "resolver", &impl, 0, "cancel"));
+
+  impl.reset(static_cast<void*>(0), socket_ops::noop_deleter());
+}
+
+void resolver_service_base::start_resolve_op(resolve_op* op)
+{
+  if (BOOST_ASIO_CONCURRENCY_HINT_IS_LOCKING(SCHEDULER,
+        scheduler_.concurrency_hint()))
+  {
+    start_work_thread();
+    scheduler_.work_started();
+    work_scheduler_->post_immediate_completion(op, false);
+  }
+  else
+  {
+    op->ec_ = boost::asio::error::operation_not_supported;
+    scheduler_.post_immediate_completion(op, false);
+  }
+}
+
+void resolver_service_base::start_work_thread()
+{
+  boost::asio::detail::mutex::scoped_lock lock(mutex_);
+  if (!work_thread_.get())
+  {
+    work_thread_.reset(new boost::asio::detail::thread(
+          work_scheduler_runner(*work_scheduler_)));
+  }
+}
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_IMPL_RESOLVER_SERVICE_BASE_IPP