Date: Sun, 29 Jul 2012 22:47:21 +0200 From: Luigi Rizzo <rizzo@iet.unipi.it> To: Arnaud Lacombe <lacombar@gmail.com> Cc: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, David Chisnall <theraven@freebsd.org>, current@freebsd.org Subject: Re: RFC: libkern version of inet_ntoa_r Message-ID: <20120729204721.GA87481@onelab2.iet.unipi.it> In-Reply-To: <CACqU3MVNCOdde7atRVT7xaYH1qHjm=4uS0Eih8EgG3=DDaOGCw@mail.gmail.com> References: <20120725155211.GA33971@onelab2.iet.unipi.it> <alpine.BSF.2.00.1207282213171.4474@ai.fobar.qr> <20120729095833.GB80946@onelab2.iet.unipi.it> <CBCC6E24-8D03-422E-B571-1B62FB7667E6@FreeBSD.org> <20120729191958.GB85015@onelab2.iet.unipi.it> <CACqU3MVNCOdde7atRVT7xaYH1qHjm=4uS0Eih8EgG3=DDaOGCw@mail.gmail.com>
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On Sun, Jul 29, 2012 at 03:38:59PM -0400, Arnaud Lacombe wrote:
> Hi,
>
> On Sun, Jul 29, 2012 at 3:19 PM, Luigi Rizzo <rizzo@iet.unipi.it> wrote:
> > Remapping f(a) into f(a, b) requires both a macro
> > and a wrapping function, something like this
> >
> > T __f(T1 a, T2 b) { return f(a, b); }
> > #define f(a) __f(a, b)
> >
> This can be done way more easily:
>
> void fn(int a, int b)
> {
> printf("%d %d\n", a, b);
> }
>
> #define fn(x) ({ fn(x, 42); })
nice trick, one always learns something on these lists...
now i wonder how it works with MSVC (windows being one of the
other platforms where i need to build the ipfw+dummynet code...)
cheers
luigi
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