+#include "../configuration.hpp"
+#include "../can/can-signals.hpp"
+#include "../obd2/obd2-signals.hpp"
+
+#include "../low-can-binding.hpp"
+
+extern std::mutex subscribed_signals_mutex;
+std::mutex& get_subscribed_signals_mutex();
+
+/**
+ * @brief return the subscribed_signals map.
+ *
+ * return Map of subscribed signals.
+ */
+extern std::map<std::string, struct afb_event> subscribed_signals;
+std::map<std::string, struct afb_event>& get_subscribed_signals();