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diff --git a/subversion/bindings/cxx/src/private/init_private.hpp b/subversion/bindings/cxx/src/private/init_private.hpp
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+/**
+ * @copyright
+ * ====================================================================
+ *    Licensed to the Apache Software Foundation (ASF) under one
+ *    or more contributor license agreements.  See the NOTICE file
+ *    distributed with this work for additional information
+ *    regarding copyright ownership.  The ASF licenses this file
+ *    to you under the Apache License, Version 2.0 (the
+ *    "License"); you may not use this file except in compliance
+ *    with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing,
+ *    software distributed under the License is distributed on an
+ *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *    KIND, either express or implied.  See the License for the
+ *    specific language governing permissions and limitations
+ *    under the License.
+ * ====================================================================
+ * @endcopyright
+ */
+
+#ifndef SVNXX_PRIVATE_INIT_HPP
+#define SVNXX_PRIVATE_INIT_HPP
+
+#include <memory>
+#include <mutex>
+#include <stdexcept>
+
+#include <apr_pools.h>
+
+#include "svnxx/init.hpp"
+#include "svnxx/detail/noncopyable.hpp"
+
+namespace apache {
+namespace subversion {
+namespace svnxx {
+namespace detail {
+
+class global_state : noncopyable
+{
+public:
+  using ptr = std::shared_ptr<global_state>;
+  using weak_ptr = std::weak_ptr<global_state>;
+
+  ~global_state();
+
+  static ptr create();
+  static ptr get()
+    {
+      auto state = self.lock();
+      if (!state)
+        {
+          throw std::logic_error(
+              "The SVN++ library is not initialized."
+              " Did you forget to create an instance of "
+              " the apache::subversion::svnxx::init class?");
+        }
+      return state;
+    }
+
+  apr_pool_t* get_root_pool() const noexcept
+    {
+      return root_pool;
+    }
+
+private:
+  // Thou shalt not create global_states other than through the factory.
+  global_state();
+
+  apr_pool_t* root_pool{nullptr};
+
+  static std::mutex guard;
+  static weak_ptr self;
+};
+
+} // namespace detail
+} // namespace svnxx
+} // namespace subversion
+} // namespace apache
+
+#endif // SVNXX_PRIVATE_INIT_HPP