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Re: [CPROG] Byte alignment

On Thu, 4 Jul 2002, Lars H. wrote:

> Nu kan man komme om meget ved at have lidt viden når struct's skrives. Ved 
> at bytte på enkelte værdier vil det give det samme vil jeg mene. 
> 
> Hvis du f.eks. i en struct har 4 stk. UInt32 og 4 stk. UInt32 er det værste 
> du kan gør dette.

Ahem... 32/8 :-)

Anyway, det kommer jo også an på ting som cachelinier, men generelt har du 
ret.

> 
> Altså byt om, og vær glad. 
> Kender ingen compiler eller precompiler der kan lave denne ombytning. Men 
> har heller ikke checket op de seneste versioner.

Det ville medføre mange kompatibilitetsproblemer - tænk på at du så ikke 
ville kunne regne med layoutet i headerfiler.

Mads

-- 
Mads Bondo Dydensborg.                               sslug@sslug
Microsoft's stance in this brouhaha is, of course, hypocritical to the
point of being nauseating. 
    -     Eric S. Raymond on MS's demand that AOL use open protocols for IM

 
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