#define CHECK_OBJECT(t,p,k) \
    do {    \
        t _obj; \
        ReflectedEntry e;   \
        e.item = (p);   \
        e.refclass = (k);   \
        mono_domain_lock (domain);  \
        if (!domain->refobject_hash)    \
            domain->refobject_hash = mono_g_hash_table_new_type (reflected_hash, reflected_equal, MONO_HASH_VALUE_GC);  \
        if ((_obj = mono_g_hash_table_lookup (domain->refobject_hash, &e))) {   \
            mono_domain_unlock (domain);    \
            return _obj;    \
        }   \
        mono_domain_unlock (domain); \
    } while (0)