I'm a newbie for c programming. I want to know the usage of macro in nginx.

thanks for explain this to me!

On Mon, Sep 29, 2014 at 7:03 AM, Valentin V. Bartenev <vbart@nginx.com> wrote:
> On Sunday 28 September 2014 12:00:45 XiaoBing Jiang wrote:
>> I grep the '#if 0', find many in code.
>>
>> why this don't using '#if 0'? I feel using '#if (NGX_THREADS0)' is
>> more confused.
>
> This one is about threads, so it combines #if (NGX_THREADS) and #if 0,
> or just a shorter way to write #if (NGX_THREADS && 0).
>
> For example, you can also find "#if (NGX_DEBUG0)".
>
> Why actually do you care? That's a dead code anyway.
>
> wbr, Valentin V. Bartenev
>
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