ocs_list_get_head
ocs->domain = ocs_list_get_head(&ocs->domain_list);
while ((domain = ocs_list_get_head(&ocs->domain_list)) != NULL) {
ocs_command_ctx_t *ctx = ocs_list_get_head(&hw->cmd_head);
#define ocs_list_remove_head(list) ocs_list_remove(list, ocs_list_get_head(list))
for (item = ocs_list_get_head((list)); item; item = ocs_list_next((list), item) )
for (item = ocs_list_get_head(list), nxt = item ? ocs_list_next(list, item) : NULL; item; \
node_group = ocs_list_get_head(&node_group_dir->node_group_list);
return ocs_segment_remaining(ocs_list_get_head(&textbuf->segment_list));