dolfin team mailing list archive

[Johan Hake <hake.dev@xxxxxxxxx>]

Would it be possible to move DofMaps to dolfin/la and make them backend
specific?

Johan

On 11/15/2012 08:16 AM, Garth N. Wells wrote:
> On Thu, Nov 15, 2012 at 6:37 AM, Martin Sandve Alnæs <martinal@xxxxxxxxx> wrote:
>> ---------- Videresendt melding ----------
>> Fra:
>> Dato: 15. nov. 2012 07:35
>> Emne: Re: [Dolfin] unsigned int -> std::size_t
>> Til: "Garth N. Wells" <gnw20@xxxxxxxxx>
>>
>>
>> A typedef for the chosen linear algebra backend? How is that possible with
>> dynamic choice of backend?
>>
> 
> A 'primary' backend will need to be decided at configure time, and the
> index type will match the index type of the primary backend. I don't
> see any way to get around this. Templating some functions will not
> help because the dof map needs to use a compatible index type, and
> this would tie a dof map to a backend (and templates will make the
> code more complicated).
> 
> At present we just assume that all backends use an index type that is
> compatible with unsigned int, but we can't justify this assumption.
> Flaws in DOLFIN la handling have shown up with the release of Trilinos
> 11, which introduces 64-bit ints to its interface. PETSc uses
> PetscInt, and we have just assumed that it's compatible with unsigned
> int.
> 
> Garth
> 
> 
>> Martin
>>
>> Den 14. nov. 2012 18:06 skrev "Garth N. Wells" <gnw20@xxxxxxxxx> følgende:
>>
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