[MOAB-dev] thread safety

[Vijay S. Mahadevan]

Lorenzo, we are starting to invest time into making MOAB completely
thread-safe. As Iulian mentioned, if you have immediate needs, the
best method would be to stick with the *_iterate calls that basically
just query the contiguous arrays in memory. If you see any
inconsistent behaviors, please do send us a small test case so that we
can replicate it.

We are planning to verify the API functions in Core/Interface and
ParallelComm as a first step in preparation for the next minor
release, some time around Dec, 2014. If you have contributions, those
would be much appreciated too. Also, if there are other API functions
that pose a priority, let us know.

Vijay

On Fri, Oct 3, 2014 at 9:46 AM, Grindeanu, Iulian R. <iulian at mcs.anl.gov> wrote:
> How are you planing to use these?
> can you share some code?
>
> I think we are using some hints for the next similar calls, which may not be thread safe.
> One solution would be to use direct access to memory calls, which return pointers in memory, for contiguous access.
>
> so we could use tag_iterate, coords_iterate, connect_iterate.
> The disadvantage is that an extra loop is needed if the sequences are broken.
>
> Iulian
>
> ________________________________________
> From: moab-dev-bounces at mcs.anl.gov [moab-dev-bounces at mcs.anl.gov] on behalf of Paul Wilson [wilsonp at engr.wisc.edu]
> Sent: Friday, October 03, 2014 8:38 AM
> To: Lorenzo Alessio Botti; MOAB-dev at mcs.anl.gov
> Subject: Re: [MOAB-dev] thread safety
>
> Hi Lorenzo,
>
> We also have quite urgent needs for this and have begun looking at it
> for our use cases.
>
> Paul
>
> On 10/03/2014 04:44 AM, Lorenzo Alessio Botti wrote:
>> Dear all,
>> trying to playing around with some threaded code I seem to understand that some moab interface methods are not thread safe.
>>
>> I'm concurrently using, for example
>> tag_get_data
>> get_connectivity
>> get_coords
>>
>> Is my assertion correct or am I messing things up on my side?
>> If so, do you have any plans to implement a set, or a subset, of thread safe methods?
>>
>> Thanks for the infos.
>> Lorenzo
>
> --
> -- ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ --
> Paul Wilson ~ UW-Madison ~ 608-263-0807 ~ cal: http://bit.ly/pphw-cal
> Professor, Engineering Physics. ~ http://cnerg.engr.wisc.edu
> Faculty Director, Advanced Computing Infrastructure
>
>