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From: Michael S <already5chosen@yahoo.com>
Newsgroups: comp.lang.c
Subject: Re: filling area by color atack safety
Date: Wed, 20 Mar 2024 15:44:38 +0200
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On Wed, 20 Mar 2024 13:44:04 +0100
fir <fir@grunge.pl> wrote:

> Michael S wrote:
> > On Wed, 20 Mar 2024 00:30:56 +0100
> > fir <fir@grunge.pl> wrote:
> >  
> >> Michael S wrote:  
> >>> On Wed, 20 Mar 2024 00:03:04 +0100
> >>> fir <fir@grunge.pl> wrote:  
> >>>> im not quite sure what you do here.. pass the structure? in fact
> >>>> the thing you name context you may not pass at all just make is
> >>>> standalone static variables becouse they/it is the same for whole
> >>>> "branch" (given recursive branch of recolorisation)
> >>>>
> >>>> something like
> >>>>
> >>>> int old_color = 0xff0000;
> >>>> int new_color = 0x00ff00;
> >>>>
> >>>> void RecolorizePixelAndAdjacentPixels(int x, int y)
> >>>> {
> >>>>      //...
> >>>> }
> >>>>
> >>>>  
> >>>
> >>> Not thred-safe.
> >>>  
> >> some thread safe as previous,  
> >
> > The same as your previous.
> > But I was modifying Malcolm's recursive variant rather than yours.
> > Malcolm's was thread-safe.
> >
> >
> >  
> sure, i dont always read into peoples code.. i just wanted to say it 
> seems you pass this context structure or pointer to it 

Yes, pointer. That's the whole point of my modification of
Malcolm's code - to copy one pointer instead of 5 variables that
are never changed.

> down the stack 
> each call - it is not necessary

Not necessary if you don't want it thread-safe. Necessary otherwise.