ddt_object_count
if ((count = ddt_object_count(ddt, type, class)) == 0)
count += ddt_object_count(ddt, type, class);
ddo->ddo_count = ddt_object_count(ddt, type, class);
ddo->ddo_count = ddt_object_count(ddt, type, class);
ASSERT(ddt_object_count(ddt, type, class) == 0);
extern uint64_t ddt_object_count(ddt_t *ddt, enum ddt_type type,