From mboxrd@z Thu Jan  1 00:00:00 1970
From: ibaydan@gmail.com (=?ISO-8859-9?Q?=DDsmail_Baydan?=)
Date: Wed, 27 Apr 2011 12:09:13 +0300
Subject: What is the adventage of macros against function
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2011/4/27 Ramya Desai <ramya.desai@gmail.com>

> 2011/4/27 ?smail Baydan <ibaydan@gmail.com>:
> > Currently I am trying to learn linux kernel while looking around I saw
> that
> > a lot of function likes macros are defined.What is the adventage of
> macros
> > over functions.
> If the size of the function is very small, then the macro is better
> when compared to function. The macros are replaced at the time of
> preprocessing. However, if there is a function, then there may be
> overhead in calling the function. When there is a call, the return
> address needs to be stored on the stack. This makes some overhead. So,
> if the size of a fucction is big, then define it as function otherwise
> make it as a macro.
>
> I guess, this helps you a bit.
>
> Regards,
> Ramya.
>
> > Thanks
> >
> > --
> > ?smail Baydan
> >
> > _______________________________________________
> > Kernelnewbies mailing list
> > Kernelnewbies at kernelnewbies.org
> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >
> >
>

thanks

-- 
?smail Baydan
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