* @brief Registers a running instance of a MPI program.
*
* @param name the reference name of the function.
- * @param code the main mpi function (must have a int ..(int argc, char *argv[])) prototype
+ * @param code either the main mpi function
+ * (must have a int ..(int argc, char *argv[]) prototype) or nullptr
+ * (if the function deployment is managed somewhere else —
+ * e.g., when deploying manually or using smpirun)
* @param num_processes the size of the instance we want to deploy
*/
void SMPI_app_instance_register(const char *name, xbt_main_func_t code, int num_processes)