cc_exec_next
if (cc_exec_next(cc) == c)
cc_exec_next(cc) = LIST_NEXT(c, c_links.le);
if (cc_exec_next(cc) == c)
cc_exec_next(cc) = LIST_NEXT(c, c_links.le);
cc_exec_next(cc) = next;
next = cc_exec_next(cc);
cc_exec_next(cc) = NULL;
cc_exec_next(cc) = c;