[petsc-users] How to pass the Matrices between functions in c++

[Matthew Knepley]

On Mon, Jun 15, 2015 at 4:40 PM, ehsan sadrfaridpour <it.sadr at gmail.com>
wrote:

> Thanks a lot. So, I guess I shouldn't destroy it before I use it
> completely in other functions. And in the end I just call a destroy
> functions.
>

Yes, after you are done using it call MatDestroy(&A)

  Thanks,

     Matt


> Best,
> Ehsan
>
> On Mon, Jun 15, 2015 at 5:36 PM, Matthew Knepley <knepley at gmail.com>
> wrote:
>
>> On Mon, Jun 15, 2015 at 4:12 PM, ehsan sadrfaridpour <it.sadr at gmail.com>
>> wrote:
>>
>>> Hi,
>>> Thanks for your great support.
>>> I am developing my code in c++ and I have created 4 matrices in a
>>> function and they are work fine.
>>> In the end of the function I need to delete them to release the memory
>>> space they occupied.
>>>
>>>    - My question:
>>>
>>> However, I need to pass these matrices to other functions (or another
>>> class) and use their contents before I destroy them in the current function.
>>>
>>> (I need it because now I have a long function and I want to make it
>>> smaller. Also I need to make a recursive function that gets matrices as
>>> input.)
>>>
>>> I was thinking of using a pointer to the beginning of each of them, but
>>> I am not very good at this. Also I am worried about how I destroy them.
>>>
>>> Would you please let me know what is the best approach for this?
>>>
>>
>> You can just use "Mat A" since the PETSc type is a pointer.
>>
>>   Thanks,
>>
>>     Matt
>>
>>
>>> Best,
>>> Ehsan
>>>
>>>
>>
>>
>> --
>> 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
>>
>
>


-- 
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
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