Re: question: DLD write and debug

[Paul Kienzle]

On Apr 16, 2004, at 2:35 PM, Eric Chassande-Mottin wrote:

> 2) what happens if I declare C++ (not Octave) global variables in a 
> DLD?
>
> i.e., if I declare a variable _before_ starting any function, like:
>
> static double x=0.0;
>
> DEFUN_DLD (foo, args, ,
>   "blablabla\n")
> {
> [...]
> }
>
> can I realibly use x in all functions declared in the file?

Yes.

> or should I avoid that? (if yes, why?)

Yes.  It makes it more difficult for functions to be reentrant,
and it will make multithreading even harder to do.

I ran into reentrancy problems today with fsolve, but I
don't see multithreading being an issue for the foreseeable
future.

> does that interfere with Octave's workspace ?

No, but you can add symbols to octave's workspace if you
need to.

Paul Kienzle
address@hidden



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