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Re: Design for shared data

Cross-posted to 2 groups.

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On 2011-9-25 14:47, ittium wrote:
> Group,
> I have a design a multi-threaded system that uses good amount of shared
> data. This data is needed in multiple classes/functions. I have three
> designs for it.
> 1. Keep the data global, so that it can be accessed any where
> 2. Wrap the data in singleton class and use it wherever needed by
> getInstance static method.
> 3. Pass the data by constant reference where ever needed. In this case
> if function is part of some function hierarchy then data will have to be
> passed from topmost function to the function where it is used.


Singletons are evil
http://blogs.msdn.com/b/scottdensmore/archive/2004/05/25/140827.aspx

And they are more evil in multiple thread.

So your 1 and 2 approached are kicked out.

And 3 is the good approach, IMO.


-- 
WQ

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Design for shared data ittium <ittium@gmail.com> - 2011-09-25 12:17 +0530
  Re: Design for shared data Qi <no@no.com> - 2011-09-25 16:45 +0800
    Re: Design for shared data Marcel Müller <news.5.maazl@spamgourmet.org> - 2011-09-25 15:14 +0200
      Re: Design for shared data ittium <ittium@gmail.com> - 2011-09-25 20:23 +0530
  Re: Design for shared data Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-25 06:05 -0500

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