This is used (as in this case) to let the code know the first time it is
called so it can do something different other times.
Hope this helps,
greg k-h
greg@kroah.com
On Wed, 22 Dec 1999 02:41:33 -0200, <cryonic@linuxbr.com.br> wrote:
>Hi, I was having a tour in the kernel sources and I found some codes
>that I can't understand why. Like this in ppp:
>
>int
>ppp_init (struct device *dev)
>{
> static int first_time = 1; <== define to 1
> int answer = 0;
>
> if (first_time) { <== check if is 1, why ? any special special reason?
> first_time = 0;
> answer = ppp_first_time();
> if (answer == 0)
> (void) register_symtab (&ppp_syms);
> }
> if (answer == 0)
> answer = -ENODEV;
> return answer;
>}
>
>I found many more codes like this in the source, I cant remeber where anymore.
-
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