Actual source code: slepc-interface.c

slepc-3.5.2 2014-10-10
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  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) 2002-2014, Universitat Politecnica de Valencia, Spain

  9:    This file is part of SLEPc.

 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 <slepcbv.h>
 26: #include <petscvec.h>
 27: #include <stdlib.h>
 28: #include <blopex_interpreter.h>
 29: #include <blopex_temp_multivector.h>
 30: #include "slepc-interface.h"

 32: static void* mv_TempMultiVectorCreateFromBV(void* ii_,BlopexInt n,void* sample)
 33: {
 34:   int i;
 35:   BV  bv = (BV)sample;
 36:   Vec v;

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

 41:   x = (mv_TempMultiVector*)malloc(sizeof(mv_TempMultiVector));
 42:   if (!x) SETERRABORT(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Allocation for x failed");

 44:   x->interpreter = ii;
 45:   x->numVectors = n;

 47:   x->vector = (void**)calloc(n,sizeof(void*));
 48:   if (!x->vector) SETERRABORT(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Allocation for x->vector failed");

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

 54:   for (i=0;i<n;i++) {
 55:     BVGetColumn(bv,i,&v);
 56:     PetscObjectReference((PetscObject)v);
 57:     x->vector[i] = (void*)v;
 58:     BVRestoreColumn(bv,i,&v);
 59:   }
 60:   return x;
 61: }

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

 67:   if (!x) return;

 69:   if (x->ownsVectors && x->vector) free(x->vector);
 70:   if (x->mask && x->ownsMask) free(x->mask);
 71:   free(x);
 72: }

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

 84:   return 0;
 85: }

 87: /*
 88:     Change the multivector destructor in order to destroy the multivector
 89:     structure without destroy the PETSc vectors.
 90: */
 91: void SLEPCSetupInterpreterForDignifiedDeath(mv_InterfaceInterpreter *i)
 92: {
 93:   i->DestroyMultiVector = mv_TempMultiPETSCVectorDestroy;
 94: }