[MOAB-dev] iMeshP function argument

[Hong-Jun Kim]

I have one more question about the argument, command_code, as in the following function. 

void iMeshP_exchEntArrToPartsAll( 
iMesh_Instance instance, 
const iMeshP_PartitionHandle partition, 
const iBase_EntityHandle *entities, 
const int entities_size, 
const iMeshP_Part *target_part_ids, 
int command_code , 
int update_ghost, 
iMeshP_RequestHandle *request, 
int *err); 

The command_code is indicating whether to migrate input entities or only makes copies, that is, the ownership should be changed if it is set as 1. 

However, this option can make some questions to me. 

At first, if the entities are migrated to another processor, should the entities be deleted in sending processor? 

In addition, if there are already shared information in entities or the exchanged entities are multi-shared, I can not decide which processor has the ownership. 
For example, if the entity is shared by p0, p1 and p2 and they are sent from p0 to p1 and p2, which processor should have the ownership? 

And, if the entity's ownership is already got from p0, when the entity is sent from p1 to only p2, the entity's ownership is changed to p2 in p1 and p2, and should the ownership in p0 also be changed to p2? 

I think there can be more problems to me when command_code is set to 1, and then can you give me some comments about it not to wander about the function? 

Thanks. 

Hong-Jun 


----- Original Message -----

> From: "Tim Tautges" <tautges at mcs.anl.gov> 
> To: moab-dev at mcs.anl.gov 
> Sent: Wednesday, June 15, 2011 3:07:36 PM 
> Subject: Re: [MOAB-dev] iMeshP function argument 
> I think in this case the number of part ids is the same as the number 
> of entities. 
> 
> - tim 
> 
> On 06/14/2011 02:20 PM, Hong-Jun Kim wrote: 
> > Hi, all 
> > 
> > I am implementing the following function in iMeshP, but I just want 
> > to 
> > confirm "const iMeshP_Part *target_part_ids" argument is correct. 
> > 
> > I think it should be "const iMeshP_Part target_part_ids" for one 
> > input 
> > part, or for multiple input parts, there should be one more "const 
> > int 
> > part_id_size" argument. 
> > Isn't it right? 
> > 
> > void iMeshP_exchEntArrToPartsAll( 
> > iMesh_Instance instance, 
> > const iMeshP_PartitionHandle partition, 
> > const iBase_EntityHandle *entities, 
> > const int entities_size, 
> > const iMeshP_Part *target_part_ids, 
> > int command_code, 
> > int update_ghost, 
> > iMeshP_RequestHandle *request, 
> > int *err); 
> > 
> > ----------------------------- 
> > Hong-Jun Kim 
> > Post-doc researcher 
> > MCS, Argonne National Laboratory 
> > 9700 S. Cass Ave. B240/R2147 
> > Argonne, IL 60439 
> > 630-252-4791 
> > hongjun at mcs.anl.gov 
> > ----------------------------- 
> > 
> 
> -- 
> ================================================================ 
> "You will keep in perfect peace him whose mind is 
> steadfast, because he trusts in you." Isaiah 26:3 
> 
> Tim Tautges Argonne National Laboratory 
> (tautges at mcs.anl.gov) (telecommuting from UW-Madison) 
> phone: (608) 263-8485 1500 Engineering Dr. 
> fax: (608) 263-4499 Madison, WI 53706 
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