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Re: Type of udata in kevent

On Sat, Nov 10, 2012 at 10:40:19AM -0500, D'Arcy J.M. Cain wrote:
> In /usr/include/sys/event.h we define udata in the kevent structure as
> intptr_t.  FreeBSD defines it as a void *.  This is a problem with
> portability.  The comment describes udata as "opaque user data
> identifier" suggesting that FreeBSD is correct.  Does anyone know why
> we call it a pointer to an int?

The idea was that it can be used as both a pointer and a number. But I
don't think that this advantage justifies the compatibility problem.

        Kind regards

Matthias Scheler                        

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