+ static int keyval_create(MPI_Comm_copy_attr_function* copy_fn, MPI_Comm_delete_attr_function* delete_fn, int* keyval, void* extra_state);
+ static int keyval_free(int* keyval);
+ static void keyval_cleanup();
+
+ void add_rma_win(MPI_Win win);
+ void remove_rma_win(MPI_Win win);
+ void finish_rma_calls();
+