[Trilinos-Users] AztecOO and ~OperatorData()

[Williams, Alan B]

Simone,

No, AztecOO does not destroy your P operator. When you use
SetPrecOperator, AztecOO wraps your operator in an internal struct.
AztecOO later destroys that struct, but it should not destroy your
operator.

Alan
 

> -----Original Message-----
> From: trilinos-users-bounces at software.sandia.gov 
> [mailto:trilinos-users-bounces at software.sandia.gov] On Behalf 
> Of Simone Deparis
> Sent: Tuesday, December 13, 2005 12:26 PM
> To: trilinos-users at software.sandia.gov
> Subject: [Trilinos-Users] AztecOO and ~OperatorData()
> 
> Hi,
> 
> I have the following issue/understanding:
> 
> I have a preconditioner P of type Prec derived from Epetra_Operator:
> 
> Prec P;
> 
> I set this as preconditioner to Aztec00:
> 
> {
>   AztecOO Solver(Problem); // Problem is of class Epetra_LinearProblem
>   Solver.SetPrecOperator(&P);
>   M_Solver->Iterate(numiter, tol);
> }
> 
> Now the instance Solver of Aztec00 has been destroyed (since 
> outside the brackets).
> If I look through Aztec00.cpp, the destruction of Solver has 
> involved the distruction of my preconditioner P ( through  
> AztecOO::DeleteMemory() and AztecOO::~AztecOO(void) ).
> 
> Do I understand well what's going on? If I am right, is this 
> the behavior that we wish?
> I don't! I would prefer that I decide when to destroy my 
> preconditioner.
>  Is there a reason for this?
> 
> Thank you
> 
> Simone
> 
> 
> --
> _____________________________________________________________________
>                                     Simone Deparis
>   .~.                               Mech Eng Dept - MIT
>   /V\   L   I   N   U   X           77 Mass Ave Room 3-264
>  // \\  =================           Cambridge MA 02139
> /(   )\                             USA
>  ^^-^^
> phone :  +1 617 452 3285  mailto:deparis at mit.edu
> fax   :  +1 617 258 8559  http://www.mit.edu/~deparis
> _____________________________________________________________________
> 
> 
> 
> _______________________________________________
> Trilinos-Users mailing list
> Trilinos-Users at software.sandia.gov
> http://software.sandia.gov/mailman/listinfo/trilinos-users
>