Subversion Repositories slepc-dev

/*

   Modification of the *temp* implementation of the BLOPEX multivector in order

   to wrap created PETSc vectors as multivectors.

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   SLEPc - Scalable Library for Eigenvalue Problem Computations

   Copyright (c) 2002-2010, Universidad Politecnica de Valencia, Spain

   This file is part of SLEPc.

   SLEPc is free software: you can redistribute it and/or modify it under  the

   terms of version 3 of the GNU Lesser General Public License as published by

   the Free Software Foundation.

   SLEPc  is  distributed in the hope that it will be useful, but WITHOUT  ANY

   WARRANTY;  without even the implied warranty of MERCHANTABILITY or  FITNESS

   FOR  A  PARTICULAR PURPOSE. See the GNU Lesser General Public  License  for

   more details.

   You  should have received a copy of the GNU Lesser General  Public  License

   along with SLEPc. If not, see <http://www.gnu.org/licenses/>.

   - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

*/

#include "petscsys.h"

#include "petscvec.h"

#include "petscmat.h"

#include <assert.h>

#include <stdlib.h>

#include "petscblaslapack.h"

#include "interpreter.h"

#include "temp_multivector.h"

#include "slepc-interface.h"

static void* mv_TempMultiVectorCreateFromPETScVector( void* ii_, int n, void* sample )

{

  int i;

  Vec *vecs = (Vec*)sample;

  mv_TempMultiVector* x;

  mv_InterfaceInterpreter* ii = (mv_InterfaceInterpreter*)ii_;

  x = (mv_TempMultiVector*) malloc(sizeof(mv_TempMultiVector));

  assert( x != NULL );

  x->interpreter = ii;

  x->numVectors = n;

  x->vector = (void**) calloc( n, sizeof(void*) );

  assert( x->vector != NULL );

  x->ownsVectors = 1;

  x->mask = NULL;

  x->ownsMask = 0;

  for ( i = 0; i < n; i++ ) {

    x->vector[i] = (void*)vecs[i];

  }

  return x;

}

static void mv_TempMultiPETSCVectorDestroy( void* x_ )

{

  mv_TempMultiVector* x = (mv_TempMultiVector*)x_;

  if ( x == NULL )

    return;

  if ( x->ownsVectors && x->vector != NULL ) {

       free(x->vector);

  }

  if ( x->mask && x->ownsMask )

    free(x->mask);

  free(x);

}

/*

    Create an InterfaceInterpreter using the PETSc implementation

    but overloading CreateMultiVector that doesn't create any

    new vector.

*/

int SLEPCSetupInterpreter( mv_InterfaceInterpreter *i )

{

  PETSCSetupInterpreter(i);

  i->CreateMultiVector = mv_TempMultiVectorCreateFromPETScVector;

  return 0;

}

/*

    Change the multivector destructor in order to destroy the multivector

    structure without destroy the PETSc vectors.

*/

void SLEPCSetupInterpreterForDignifiedDeath( mv_InterfaceInterpreter *i )

{

  i->DestroyMultiVector = mv_TempMultiPETSCVectorDestroy;

}