+/*************
+ * Callbacks *
+ *************/
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emit the callbacks after Storage creation *
+ * @details Callback functions have the following signature: `void(StoragePtr)`
+ */
+extern surf_callback(void, StoragePtr) storageCreatedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emit the callbacks after Storage destruction *
+ * @details Callback functions have the following signature: `void(StoragePtr)`
+ */
+extern surf_callback(void, StoragePtr) storageDestructedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emit the callbacks after Storage State changed *
+ * @details Callback functions have the following signature: `void(StorageActionPtr action, e_surf_resource_state_t old, e_surf_resource_state_t current)`
+ */
+extern surf_callback(void, StoragePtr, e_surf_resource_state_t, e_surf_resource_state_t) storageStateChangedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emit the callbacks after StorageAction State changed *
+ * @details Callback functions have the following signature: `void(StorageActionPtr action, e_surf_action_state_t old, e_surf_action_state_t current)`
+ */
+extern surf_callback(void, StorageActionPtr, e_surf_action_state_t, e_surf_action_state_t) storageActionStateChangedCallbacks;
+