tree_count
if (tree_count(&sessions) >= env->sc_mda_max_session) {
if (tree_count(&relay->connectors) == 0) {
if (tree_count(&relay->connectors) < relay->sourceloop) {
r->refcount, r->ntask, tree_count(&r->connectors), r->nconn);
if (tree_count(&relay->connectors) == r)
if (tree_count(&hs->deferred) >= env->sc_mta_max_deferred)
if (tree_count(&flush_evp) == 1) {
while (tree_count(&evpcache_tree) >= env->sc_queue_evpcache_size)