+XBT_PUBLIC(gras_datadesc_type_t) gras_datadesc_by_id(long int code);
+
+/* to debug */
+XBT_PUBLIC(void) gras_datadesc_type_dump(const gras_datadesc_type_t ddt);
+XBT_PUBLIC(const char *) gras_datadesc_arch_name(int code);
+
+/* compare two data type description */
+XBT_PUBLIC(int)
+gras_datadesc_type_cmp(const gras_datadesc_type_t d1,
+ const gras_datadesc_type_t d2);
+
+/* Access function */
+XBT_PUBLIC(int) gras_datadesc_size(gras_datadesc_type_t type);
+/* Described data exchanges: direct use */
+XBT_PUBLIC(int) gras_datadesc_memcpy(gras_datadesc_type_t type, void *src,
+ void *dst);
+XBT_PUBLIC(void) gras_datadesc_send(gras_socket_t sock,
+ gras_datadesc_type_t type, void *src);
+XBT_PUBLIC(void) gras_datadesc_recv(gras_socket_t sock,
+ gras_datadesc_type_t type, int r_arch,
+ void *dst);
+
+/* Described data exchanges: IDL compilation FIXME: not implemented*/
+ void gras_datadesc_gen_cpy(gras_datadesc_type_t type, void *src,
+ void **dst);
+ void gras_datadesc_gen_send(gras_socket_t sock,
+ gras_datadesc_type_t type, void *src);
+ void gras_datadesc_gen_recv(gras_socket_t sock,
+ gras_datadesc_type_t type, int r_arch,
+ void *dst);