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Re: [Xen-devel] [PATCH 2/2] libxl: Have flexarray using the GC

On 10/01/2012 03:17 PM, Ian Jackson wrote:
> Anthony PERARD writes ("Re: [Xen-devel] [PATCH 2/2] libxl: Have flexarray 
> using the GC"):
>> > On 09/28/2012 06:27 PM, Ian Jackson wrote:
>>> > > If gc is NOGC then this does the wrong thing.  Callers should be able
>>> > > to specify NOGC for a flexarray which they want to survive across
>>> > > multiple calls into libxl.
>> > 
>> > I'm not sure I see your point here.  If a something needs a NOGC'ed
>> > flexarray, then flexarray_make(NOGC, x, x) will give this.
> So then you put the flexarray in some long-term data structure, which
> survives the call to libxl and therefore the gc.  Is it safe for
> NOGC's gc*, derived from the now-destroyed actual gc, to be embedded
> in the flexarray and reused later in a different libxl call with a
> different gc (but the same ctx) ?

Ah, I now see the issue, a pointer that lead nowhere :S.


Anthony PERARD

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