[Development] websockets (was RE: Qt 5.3 Feature freeze is coming quite soon...)

[Kurt Pattyn]

On 11 Feb 2014, at 17:15, Thiago Macieira <thiago.macieira at intel.com> wrote:

> Em ter 11 fev 2014, às 09:04:39, Konrad Rosenbaum escreveu:
>> Please don't go there. AFAIK qrand() is a function meant to be equivalent to
>> the ANSI-C rand() function. I.e. it is supposed to be used by simple
>> simulations, be fast and produce reproducable random numbers when seeded
>> with the same value.
> 
> Fast? yes.
> 
> Needs to produce reproduceable sequence? Yes, but only because of unit 
> testing.
> 
> Equal to rand()? I'm not sure we need to keep that.
> 
> My idea was to simply securely pre-seed the PRNG before you had a chance to 
> use it, in each thread. If you need to seed it to something constant to get 
> constant results, you'd still be able to.
Or you could keep the qsrand() method. When qsrand() is not called qrand() produces the same sequence.
As part of the QtWebSockets module, I created a random generator that is fast and that has reproducible sequences. 
But it is based on std::random only. 
Code will be checked in soon. I will add you to the reviewers. 

Cheers,

Kurt
> -- 
> Thiago Macieira - thiago.macieira (AT) intel.com
>  Software Architect - Intel Open Source Technology Center
> 
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