+/********** Storage **********/
+XBT_PRIVATE SD_storage_t __SD_storage_create(void *surf_storage, void *data);
+XBT_PRIVATE void __SD_storage_destroy(void *storage);
+
+/********** Tracing **********/
+/* declaration of instrumentation functions from sd_task_instr.c */
+XBT_PRIVATE void TRACE_sd_task_create(SD_task_t task);
+XBT_PRIVATE void TRACE_sd_task_execute_start(SD_task_t task);
+XBT_PRIVATE void TRACE_sd_task_execute_end(SD_task_t task);
+XBT_PRIVATE void TRACE_sd_task_destroy(SD_task_t task);
+
+SG_END_DECL()
+