Actual source code: slepc-interface.c

  1: /*
  2:    Modification of the *temp* implementation of the BLOPEX multivector in order
  3:    to wrap created PETSc vectors as multivectors.

  5:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  6:    SLEPc - Scalable Library for Eigenvalue Problem Computations
  7:    Copyright (c) 2002-2010, Universidad Politecnica de Valencia, Spain

  9:    This file is part of SLEPc.
 10:       
 11:    SLEPc is free software: you can redistribute it and/or modify it under  the
 12:    terms of version 3 of the GNU Lesser General Public License as published by
 13:    the Free Software Foundation.

 15:    SLEPc  is  distributed in the hope that it will be useful, but WITHOUT  ANY 
 16:    WARRANTY;  without even the implied warranty of MERCHANTABILITY or  FITNESS 
 17:    FOR  A  PARTICULAR PURPOSE. See the GNU Lesser General Public  License  for 
 18:    more details.

 20:    You  should have received a copy of the GNU Lesser General  Public  License
 21:    along with SLEPc. If not, see <http://www.gnu.org/licenses/>.
 22:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 23: */

 25: #include "petscsys.h"
 26: #include "petscvec.h"
 27: #include "petscmat.h"
 28: #include <assert.h>
 29: #include <stdlib.h>
 30: #include "petscblaslapack.h"
 31: #include "interpreter.h"
 32: #include "temp_multivector.h"
 33: #include "slepc-interface.h"

 35: static void* mv_TempMultiVectorCreateFromPETScVector( void* ii_, int n, void* sample )
 36: {
 37:   int i;
 38:   Vec *vecs = (Vec*)sample;

 40:   mv_TempMultiVector* x;
 41:   mv_InterfaceInterpreter* ii = (mv_InterfaceInterpreter*)ii_;

 43:   x = (mv_TempMultiVector*) malloc(sizeof(mv_TempMultiVector));
 44:   assert( x != NULL );
 45: 
 46:   x->interpreter = ii;
 47:   x->numVectors = n;
 48: 
 49:   x->vector = (void**) calloc( n, sizeof(void*) );
 50:   assert( x->vector != NULL );

 52:   x->ownsVectors = 1;
 53:   x->mask = NULL;
 54:   x->ownsMask = 0;

 56:   for ( i = 0; i < n; i++ ) {
 57:     x->vector[i] = (void*)vecs[i];
 58:   }

 60:   return x;
 61: }

 63: static void mv_TempMultiPETSCVectorDestroy( void* x_ )
 64: {
 65:   mv_TempMultiVector* x = (mv_TempMultiVector*)x_;

 67:   if ( x == NULL )
 68:     return;

 70:   if ( x->ownsVectors && x->vector != NULL ) {
 71:        free(x->vector);
 72:   }
 73:   if ( x->mask && x->ownsMask )
 74:     free(x->mask);
 75:   free(x);
 76: }


 79: /*
 80:     Create an InterfaceInterpreter using the PETSc implementation
 81:     but overloading CreateMultiVector that doesn't create any
 82:     new vector.
 83: */
 84: int SLEPCSetupInterpreter( mv_InterfaceInterpreter *i )
 85: {
 86:   PETSCSetupInterpreter(i);
 87:   i->CreateMultiVector = mv_TempMultiVectorCreateFromPETScVector;

 89:   return 0;
 90: }

 92: /*
 93:     Change the multivector destructor in order to destroy the multivector
 94:     structure without destroy the PETSc vectors.
 95: */
 96: void SLEPCSetupInterpreterForDignifiedDeath( mv_InterfaceInterpreter *i )
 97: {
 98:   i->DestroyMultiVector = mv_TempMultiPETSCVectorDestroy;
 99: }