Re: regarding synchronization code

[Michael Blizek <michi1@michaelblizek.twilightparadox.com>]

Hi!

On 18:56 Fri 24 Sep     , Sri Ram Vemulpali wrote:
> Hi all,
> 
>   I am encountering alot macros in the code. I did not understand what
> those macro means.
> 
>   Can anyone explain them and the use of them putting them like that.
> 
>    "unlikely"

likely() and unlikely() are wrappers around gcc extensions to give hints about
whether a given branch will likely be taken or not. When done correctly, this
can improve performance.

>    "always_inline"  -- defined at the signature of the function.

This can be used because "inline" is not always inlined. There should be a gcc
option which causes all inline code to be not inlined.

>    "inline" -- I know inline keyword in compiler is used to place the
> code in to the caller function at the time of compiler, but why
> declared as macro

Where do you see inline declared as a macro?

	-Michi
-- 
programing a layer 3+4 network protocol for mesh networks
see http://michaelblizek.twilightparadox.com


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