+XBT_PRIVATE FILE* surf_fopen(const char* name, const char* mode);
+XBT_PRIVATE std::ifstream* surf_ifsopen(std::string name);
+
+/* The __surf_is_absolute_file_path() returns 1 if
+ * file_path is a absolute file path, in the other
+ * case the function returns 0.
+ */
+XBT_PRIVATE int __surf_is_absolute_file_path(const char* file_path);
+
+extern XBT_PRIVATE simgrid::trace_mgr::future_evt_set* future_evt_set;
+
+XBT_PUBLIC(void) storage_register_callbacks();
+
+XBT_PRIVATE void parse_after_config();
+
+/********** Tracing **********/
+/* from surf_instr.c */
+void TRACE_surf_host_set_speed(double date, const char* resource, double power);
+void TRACE_surf_link_set_bandwidth(double date, const char* resource, double bandwidth);
+}
+
+#endif