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) 2002-2011, Universitat 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 <assert.h>
 28: #include <stdlib.h>
 29: #include <blopex_interpreter.h>
 30: #include <blopex_temp_multivector.h>
 31: #include "slepc-interface.h"

 33: static void* mv_TempMultiVectorCreateFromPETScVector(void* ii_,BlopexInt n,void* sample)
 34: {
 35:   int i;
 36:   Vec *vecs = (Vec*)sample;

 38:   mv_TempMultiVector* x;
 39:   mv_InterfaceInterpreter* ii = (mv_InterfaceInterpreter*)ii_;

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

 50:   x->ownsVectors = 1;
 51:   x->mask = NULL;
 52:   x->ownsMask = 0;

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

 60: static void mv_TempMultiPETSCVectorDestroy(void* x_)
 61: {
 62:   mv_TempMultiVector* x = (mv_TempMultiVector*)x_;

 64:   if (x==NULL)
 65:     return;

 67:   if (x->ownsVectors && x->vector!=NULL) free(x->vector);
 68:   if (x->mask && x->ownsMask) free(x->mask);
 69:   free(x);
 70: }

 72: /*
 73:     Create an InterfaceInterpreter using the PETSc implementation
 74:     but overloading CreateMultiVector that doesn't create any
 75:     new vector.
 76: */
 77: int SLEPCSetupInterpreter(mv_InterfaceInterpreter *i)
 78: {
 79:   PETSCSetupInterpreter(i);
 80:   i->CreateMultiVector = mv_TempMultiVectorCreateFromPETScVector;

 82:   return 0;
 83: }

 85: /*
 86:     Change the multivector destructor in order to destroy the multivector
 87:     structure without destroy the PETSc vectors.
 88: */
 89: void SLEPCSetupInterpreterForDignifiedDeath(mv_InterfaceInterpreter *i)
 90: {
 91:   i->DestroyMultiVector = mv_TempMultiPETSCVectorDestroy;
 92: }