fixes for VecPlaceArray/VecResetArray

[Barry Smith]

    One can call VecCreateXXXWithArray() with a null pointer for the  
array so that
means there is already an established history of valid Vecs with null  
arrays.
I'd like you do undo the changes you made unless you have a specific  
reason
for making the change (besides the reason of not having a Vec with a  
null array).

    Barry

On Dec 3, 2008, at 5:37 PM, Lisandro Dalcin wrote:

> On Wed, Dec 3, 2008 at 8:08 PM, Matthew Knepley <knepley at gmail.com>  
> wrote:
>> On Wed, Dec 3, 2008 at 5:04 PM, Lisandro Dalcin <dalcinl at gmail.com>  
>> wrote:
>>>
>>> I've pushed some fixes for VecPlaceArray/VecResetArray, trying to  
>>> the
>>> pair a bit more smarter. However, the I'm not sure what's the use  
>>> case
>>> in VecPlaceArray for accepting NULL for the array. Just in case, I  
>>> did
>>> not changed this, but if NULL is actually pased, then the call is  
>>> now
>>> non-op. Is this fine? I'm missing something??
>>
>> I think you would like to reset the array back to NULL sometimes,  
>> to clear
>> out
>> memory of an old array it no longer owns. Is this right?
>>
>
> Not sure if I understood you comment, but the companion call
> VecResetArray() restores the original array. Before my fix, the Vec
> was left actually pointing to a NULL.
>
>
>
>>
>>>
>>> --
>>> Lisandro Dalcín
>>> ---------------
>>> Centro Internacional de Métodos Computacionales en Ingeniería  
>>> (CIMEC)
>>> Instituto de Desarrollo Tecnológico para la Industria Química  
>>> (INTEC)
>>> Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
>>> PTLC - Güemes 3450, (3000) Santa Fe, Argentina
>>> Tel/Fax: +54-(0)342-451.1594
>>
>> --
>> What most experimenters take for granted before they begin their  
>> experiments
>> is infinitely more interesting than any results to which their  
>> experiments
>> lead.
>> -- Norbert Wiener
>>
>
>
>
> -- 
> Lisandro Dalcín
> ---------------
> Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
> Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
> Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
> PTLC - Güemes 3450, (3000) Santa Fe, Argentina
> Tel/Fax: +54-(0)342-451.1594
>