static int grequest_start( MPI_Grequest_query_function *query_fn, MPI_Grequest_free_function *free_fn, MPI_Grequest_cancel_function *cancel_fn, void *extra_state, MPI_Request *request);
static int grequest_complete( MPI_Request request);
+ static int get_status(MPI_Request req, int* flag, MPI_Status * status);
+
int add_f() override;
static void free_f(int id);
static Request* f2c(int);