Aztec2Petra.h File Reference

Aztec2Petra: A function that converts an Aztec linear problem to a Petra linear problem. More...

#include "az_aztec.h"
#include "Epetra_SerialComm.h"
#include "Epetra_Map.h"
#include "Epetra_Vector.h"
#include "Epetra_VbrMatrix.h"
#include "Epetra_CrsMatrix.h"

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Functions

int Aztec2Petra (int *proc_config, AZ_MATRIX *Amat, double *az_x, double *az_b, Epetra_Comm *&comm, Epetra_BlockMap *&map, Epetra_RowMatrix *&A, Epetra_Vector *&x, Epetra_Vector *&b, int **global_indices)
 Converts from an Aztec linear problem to a Petra linear problem.

Detailed Description

Aztec2Petra: A function that converts an Aztec linear problem to a Petra linear problem.

Aztec2Petra takes the Aztec proc_config, Amat, az_x and az_b objects and converts them into corresponding Petra equivalents: comm, map (layout information), A, x, and b. This function is used by AZOO_iterate, but can be used independently by someone making a transistion from Aztec to Trilinos/AztecOO.


Function Documentation

int Aztec2Petra ( int *  proc_config,
AZ_MATRIX *  Amat,
double *  az_x,
double *  az_b,
Epetra_Comm *&  comm,
Epetra_BlockMap *&  map,
Epetra_RowMatrix *&  A,
Epetra_Vector *&  x,
Epetra_Vector *&  b,
int **  global_indices 
)

Converts from an Aztec linear problem to a Petra linear problem.

Parameters:
proc_config (In) Aztec array containing information about the parallel machine.
Amat (In) An Aztec AZ_MATRIX structure. Must be an MSR or VBR matrix at this time.
az_x (In) The Aztec initial guess/solution vector. Must be of adequate length on each processor for any ghost values (unnecessary in uniprocessor mode).
az_b (In) The Aztec right hand side vector. .
comm (Out) A pointer to a Epetra_Comm object. Must be deleted by the caller of this function.
map (Out) A pointer to a Epetra_BlockMap object. Must be deleted by the caller of this function. Note: This object may actually be a Epetra_Map object, but Epetra_BlockMap is a base clase for Epetra_Map.
A (Out) A pointer to a Epetra_RowMatrix object containing a deep copy of the matrix in Amat, if the user matrix is an Msr matrix. It is a shallow copy of the matrix if the user matrix is in Vbr format. Must be deleted by the caller of this function. Note: This pointer will actually point to a Epetra_CrsMatrix or a Epetra_VbrMatrix. We cast the pointer to a Epetra_RowMatrix because it is the abstract base class used by AztecOO.
x (Out) A pointer to a Epetra_Vector object containing a shallow copy (view) of az_x. Must be deleted by the caller of this function.
b (Out) A pointer to a Epetra_Vector object containing a shallow copy (view) of az_b. Must be deleted by the caller of this function.
global_indices (Out) A pointer to an internally created integer array. If the user matrix is in Vbr format, this array contains a copy of the column index values in global mode. By using this array, we can avoid a deep copy of the user matrix in this case. SPECIAL NOTE: This array must be delete using the special Aztec function as follows: if (global_indices!=0) AZ_free((void *) global_indices);


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