Re: New Singleton Scheme

From:

Ema <oriani.blue_reply@bancaimi.it>

Newsgroups:

comp.lang.c++.moderated

Date:

Fri, 31 Aug 2007 16:23:35 CST

Message-ID:

<1188551735.590115.125670@m37g2000prh.googlegroups.com>

{ quoted signature and server banner removed. -mod }

On 31 Ago, 10:55, Gerhard Menzl <clcppm-pos...@this.is.invalid> wrote:

Ema wrote:

To be honest I prefer the old school Singleton plus the Init() method

Snippet--------------------

class Singleton
{
   Singleton(const Singleton&);
   Singleton& operator=(const Singleton&);
public:
   void Init(void) {}

   static Singleton& Instance(void)
   {
        Singleton _s;
        return _s;
   }
};

int main(int argc, char *argv[])
{
   Singleton::Instance().Init();
   // now ready for MT use
}

What does Init() achieve which the constructor doesn't?

Simply creates the object in a single thread context (you know if
there are any mutex(es) they get created in a thread safe context).

Cheers,
Ema.

--
[ See http://www.gotw.ca/resources/clcm.htm for info about ]
[ comp.lang.c++.moderated. First time posters: Do this! ]