Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.programming.threads > #607

Re: Design for shared data

Cross-posted to 2 groups.

Show all headers | View raw

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

Back to comp.programming.threads | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

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

csiph-web