New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/editor/config_loader.hpp

@@ -0,0 +1,64 @@
+#pragma once
+
+#include "base/atomic_shared_ptr.hpp"
+#include "base/exception.hpp"
+#include "base/logging.hpp"
+
+#include <condition_variable>
+#include <memory>
+#include <mutex>
+#include <string>
+#include <thread>
+
+namespace pugi
+{
+class xml_document;
+}
+
+namespace editor
+{
+class EditorConfig;
+
+// Class for multithreaded interruptable waiting.
+class Waiter
+{
+public:
+  template <typename Rep, typename Period>
+  bool Wait(std::chrono::duration<Rep, Period> const & waitDuration)
+  {
+    std::unique_lock<std::mutex> lock(m_mutex);
+
+    if (m_interrupted)
+      return false;
+
+    m_event.wait_for(lock, waitDuration, [this]() { return m_interrupted; });
+
+    return true;
+  }
+
+  void Interrupt();
+
+private:
+  bool m_interrupted = false;
+  std::mutex m_mutex;
+  std::condition_variable m_event;
+};
+
+// Class which loads config from local drive
+class ConfigLoader
+{
+public:
+  explicit ConfigLoader(base::AtomicSharedPtr<EditorConfig> & config);
+  ~ConfigLoader();
+
+  // Static methods for production and testing.
+  static void LoadFromLocal(pugi::xml_document & doc);
+
+private:
+  void ResetConfig(pugi::xml_document const & doc);
+
+  base::AtomicSharedPtr<EditorConfig> & m_config;
+
+  Waiter m_waiter;
+};
+}  // namespace editor