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From: navee83@gmail.com (Naveen Kumar)
To: kernelnewbies@lists.kernelnewbies.org
Subject: What is the adventage of macros against function
Date: Wed, 27 Apr 2011 04:57:47 -0400	[thread overview]
Message-ID: <BANLkTinXk3s9XK=oTt2TwrSi2c0DAjyXAg@mail.gmail.com> (raw)
In-Reply-To: <BANLkTingvD62dCuGLW-4rOrmzMd2uMPwfQ@mail.gmail.com>

Actually you will see lot of macros defined to achieve small and modular
functionality.
this makes your code faster to execute but the binary size will be bigger.

You will see this in kernel code more because we have very low stack area
sometime may be one page(4096 bytes) of memory.
automatic variable declare and defined in function will occupy space in
stack.

In application side C expert suggest to have functions because we have very
big stack area and function adds readability
with easy debugging.

I hope this will help you in your kernel context.

Thanks,
Naveen

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.
> Thanks
>
> --
> ?smail Baydan
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
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      parent reply	other threads:[~2011-04-27  8:57 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-27  8:25 What is the adventage of macros against function İsmail Baydan
2011-04-27  8:46 ` Ramya Desai
2011-04-27  9:09   ` İsmail Baydan
2011-04-27 12:25   ` Jonathan Neuschäfer
2011-04-27 14:12     ` Ozan Türkyılmaz
2011-04-27  8:57 ` Naveen Kumar [this message]

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