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Can Singleton be abstracted?

WebsiteWill · 2003-11-15T18:15:52

So that if I have a class that I want as Singleton, all I have to do is cMyClass:cSingleton? Not sure if this will work because cMyClass will inherit the static singleton pointer from cSingleton so that if I also do cMyOtherClass:cSingleton then they will actually have instances to the same pointer. I was aiming at an abstract derivable cSingleton class but now I think that I''ll have to settle for simply repeating the singleton specific code in all of my classes that have to be singleton. Unless there is another way. Thanks for any input, Webby

General and Gameplay Programming Programming

Started by WebsiteWill November 13, 2003 12:48 PM

21 comments, last by WebsiteWill 20 years, 5 months ago

Shannon Barber

1,684

November 15, 2003 01:42 AM

quote:Original post by msn12b
Singleton is a hack. It causes the exact same problem it tries to solve.

The implementation is particularily problematic in C++. In other environments, it''s not so hairy.

- The trade-off between price and quality does not exist in Japan. Rather, the idea that high quality brings on cost reduction is widely accepted.-- Tajima & Matsubara

Anonymous

November 15, 2003 04:42 AM

quote:Original post by Magmai Kai Holmlor

quote:
Loki::SingletonHolder does provide a semi-thread safe policy, though it does have defects.

How so?

Its explained in the book, chapter six. The problems come from certain symmetric multiprocessor environments.

DrPizza

160

November 15, 2003 06:15 PM

quote:Original post by Magmai Kai Holmlor
quote:Original post by msn12b
Singleton is a hack. It causes the exact same problem it tries to solve.

The implementation is particularily problematic in C++. In other environments, it''s not so hairy.

Not like Java, eh....

char a[99999],*p=a;int main(int c,char**V){char*v=c>0?1[V]:(char*)V;if(c>=0)for(;*v&&93!=*v;){62==*v&&++p||60==*v&&--p||43==*v&&++*p||45==*v&&--*p||44==*v&&(*p=getchar())||46==*v&&putchar(*p)||91==*v&&(*p&&main(0,(char**)(--v+2))||(v=(char*)main(-1,(char**)++v)-1));++v;}else for(c=1;c;c+=(91==*v)-(93==*v),++v);return(int)v;}  /*** drpizza@battleaxe.net ***/

Can Singleton be abstracted?

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Can Singleton be abstracted?

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