The realization of ACE middle-line secure single-room mode

The realization of ACE middle-line secure single-room mode
Class Normal_test
{
Friend Class Ace_singleton<normal_test, ace_null_mutex>;
Public
void Show_my_life ();
Private
Normal_test ();
};

Normal_test::normal_test () {}

typedef ace_singleton<normal_test, ace_null_mutex> normal_test;

void Normal_test::show_my_life ()
{
cout << "I ' m living at" << (void*) this << Endl;
}

int ace_tmain (int argc, Ace_tchar *argv[])
{
Normal_test::instance ()->show_my_life ();
return 0;
};

As shown above, the following benefits are obtained:

1. The code has been reduced by more than half, becoming more concise and clear,
2. The use of double-check technology, free access to thread safety.
3. No use of inheritance, virtual functions, performance, efficiency will not be affected.
4. Origin (http://www.acejoy.com/bbs/dispbbs.asp?boardid=23&ID=230&replyID=230)