What about hwloc_topology check()?

What types of check does?


2011/9/3 Brice Goglin <brice.goglin@inria.fr>

There's no way to implement this check safely (being non NULL doesn't mean it was properly initialized by the user, it could still point to random memory that would cause a segfault when checking).

If you really need something like this, put an integer value on the side of the topology variable, and make 0 or 1 depending on whether the topology was init or not.

Brice


----- Reply message -----
De : "Gabriele Fatigati" <g.fatigati@cineca.it>
Pour : "Hardware locality user list" <hwloc-users@open-mpi.org>
Objet : [hwloc-users] Re : hwloc topology check initializing
Date : sam., sept. 3, 2011 15:26




Hi Brice,

but it works only if the user  assing NULL to topology.

hwloc_topology_init() does not check the argument passed ? There are no ways
to check if topology is initialized or not?

Thanks.

2011/9/3 Brice Goglin <brice.goglin@inria.fr>

>
> Assign NULL to the topology when declaring the variable. It will be changed
> into something else when init() is called.
>
> Brice
>
> ----- Reply message -----
> De : "Gabriele Fatigati" <g.fatigati@cineca.it>
> Pour : "Hardware locality user list" <hwloc-users@open-mpi.org>
> Objet : [hwloc-users] hwloc topology check initializing
> Date : sam., sept. 3, 2011 10:56
>
>
>
>
> Dear hwloc users,
>
> how to check if my hwloc topology is initialized? I have to use
> hwloc_topology_check? This code not works:
>
> hwloc_topology_t topology;
>
> if( topology==NULL)
>  exit(-1);
>
>
>
>
>
> --
> Ing. Gabriele Fatigati
>
> HPC specialist
>
> SuperComputing Applications and Innovation Department
>
> Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy
>
> www.cineca.it                    Tel:   +39 051 6171722
>
> g.fatigati [AT] cineca.it
>
> _______________________________________________
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>



--
Ing. Gabriele Fatigati

HPC specialist

SuperComputing Applications and Innovation Department

Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy

www.cineca.it                    Tel:   +39 051 6171722

g.fatigati [AT] cineca.it

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--
Ing. Gabriele Fatigati

HPC specialist

SuperComputing Applications and Innovation Department

Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy

www.cineca.it                    Tel:   +39 051 6171722

g.fatigati [AT] cineca.it