Re: kfree(0) - ok?

[Rene Herman]

On 08/15/2007 11:20 AM, Jan Engelhardt wrote:

> On Aug 15 2007 10:37, Rene Herman wrote:
> > On 08/15/2007 09:28 AM, Jan Engelhardt wrote:
> > > On Aug 14 2007 16:21, Jason Uhlenkott wrote:
> > > > On Tue, Aug 14, 2007 at 15:55:48 -0700, Arjan van de Ven wrote:

> > > > > NULL is not 0 though.
> > > >
> > > > It is.  Its representation isn't guaranteed to be all-bits-zero,
> > >
> > > C guarantees that.
> >
> > C guarantees what? If you're disagreeing with Jason -- he's right.
>
> http://coding.derkeiler.com/Archive/C_CPP/comp.lang.c/2003-11/1808.html

He said the null _pointer_ isn't guaranteed to be all-bits zero. And it 
isn't. Read the standard or the faq.

> > > > but the constant value 0 when used in pointer context is always a
> > > > null pointer (and in fact the standard requires that NULL be
> > > > #defined as 0 or a cast thereof).

Rene.
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