On Thu, Jan 19, 2006 at 05:48:33PM +0200, Olav Kongas wrote:
> Hi,
>
> The do{SOMETHING}while(0) thingy has been often discussed in
> many mailing lists, and recently an entry about it was
> updated in kernelnewbies FAQ.
>
> However, what's the role of do{SOMETHING}while, if that
> SOMETHING is empty. In kernel, both forms of defining
> 'empty' function-like macros are used:
>
> #define foo(stuff...) do { } while(0)
>
> and
>
> #define foo(stuff...)
>
> Purely a style difference, or something more there? If just
> a style thing, why would anyone prefer a style, which gives
> (slightly) more work to compiler?
>
> Thanks in advance,
> Olav
>
> PS. Please keep me CC-d as I am not subscribed.
>
> --
> Kernelnewbies: Help each other learn about the Linux kernel.
> Archive: http://mail.nl.linux.org/kernelnewbies/
If you were subscribed to this list, you'd see the following in the
footer of each email sent through this list:
> FAQ: http://kernelnewbies.org/faq/
The first answer in the FAQ entry for do { ... } while(0) answers your
question.
cu
Adrian
--
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of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
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