From: Eric Wong <e@80x24.org>
Date: Sat, 10 Jun 2017 03:21:43 GMT
Subject: Re: [PATCH v2 1/2] git-compat-util: add a FREEZ() wrapper around free(ptr); ptr = NULL
Message-ID: <20170610032143.GA7880@starla>
In-Reply-To: <xmqq60g462nd.fsf@gitster.mtv.corp.google.com>

Junio C Hamano <gitster@pobox.com> wrote:
> Eric Wong <e@80x24.org> writes:
> > I don't see the point of a macro wrapper, forcing the user to
> > type out the '&' should drive home the point that the pointer
> > gets set to NULL.  I also find capitalization tiring-to-read
> > because all characters are the same height.
> 
> Sounds sensible.
> 
> So make Jonathan's freez_impl a public API and rename it to
> free_and_null(), perhaps?

Perhaps...  I think it needs to take "void *" to avoid warnings:

	static inline void free_and_null(void *ptrptr)
	{
		void **tmp = ptrptr;

		free(*tmp);
		*tmp = NULL;
	}

...At least I needed to do that for "mog_free_and_null" in
cmogstored:

	https://bogomips.org/cmogstored.git/plain/alloc.c?h=v1.6.0

But heck, maybe that's covering up for something else I got
wrong in cmogstored *shrug*    I don't know all of C.