+struct pollfd;
+extern int jbus_fill_pollfds(struct jbus **jbuses, int njbuses, struct pollfd *fds);
+extern int jbus_dispatch_pollfds(struct jbus **jbuses, int njbuses, struct pollfd *fds, int maxcount);
+extern int jbus_read_write_dispatch_multiple(struct jbus **jbuses, int njbuses, int toms, int maxcount);
+extern int jbus_dispatch_multiple(struct jbus **jbuses, int njbuses, int maxcount);
+