[petsc-dev] DAGet[Ghosted]Coordinates and refcounts

[Lisandro Dalcin]

On 2 August 2010 18:21, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
> On Aug 2, 2010, at 9:38 AM, Lisandro Dalcin wrote:
>
>> DAGet[Ghosted]Coordinates return a new reference to the coordinate
>> vector. However, this is not the usual pattern of other XXXGetYYY
>> calls...
>
>      What do you suggest? (1)  Provide a DARestoreCoordinates() that does the dereference?  (2) remove the reference from the calls (3) change the name from get?
>
>      I like (1) but it is kind of artificial.
>
>   Barry

Barry, the DA structure holds references for coordinates,
ghosted_coordinates, and da_coordinates, these object are dereferenced
at DADestroy():
http://petsc.cs.iit.edu/petsc/petsc-dev/file/e89611ec33d6/src/dm/da/src/dadestroy.c#l147

So I think that we should just return borrowed references, if needed,
they can be manually incref'ed (I would need that in petsc4py). Am I
missing something?


-- 
Lisandro Dalcin
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