Variant 1:
    if (res == 0) {
       try {
           FinalRelease();
       } catch (...) {
           delete this;
           throw;
       }
        delete this;
    }


Variant 2:
	if (res == 0) {
		std::auto_ptr<SimpleCountedObject> delete_after_throw(this);
		FinalRelease(); // may throw, for example ScriptTest/ExecMode
	}