[Bug 1941] Whither RTEMS_offsetof?

[bugzilla-daemon at rtems.org]

https://www.rtems.org/bugzilla/show_bug.cgi?id=1941

--- Comment #3 from Sebastian Huber <sebastian.huber at embedded-brains.de> 2011-10-20 06:33:48 CDT ---
(In reply to comment #2)
> (In reply to comment #1)
> > We should implement it in terms of what the C standard provides <stddef.h>:
> > 
> > http://pubs.opengroup.org/onlinepubs/009604499/basedefs/stddef.h.html
> 
> I don't understand, what you are trying to say.

I would do this:

#include <stddef.h>

#define RTEMS_offsetof(type, member) offsetof(type, member)

> 
> GCC's offsetof is compliant to C99/POSIX => RTEMS_offsetof is meaningless and
> an potential faulty anachronism.

I would avoid the direct usage of the GCC offsetof builtin.

Was RTEMS_offsetof intended for internal use or part of a public API?

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