Actual source code: slepc-interface.c

slepc-3.7.2 2016-07-19
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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) 2002-2016, 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 <slepc/private/bvimpl.h>
 26: #include <stdlib.h>
 27: #include <blopex_interpreter.h>
 28: #include <blopex_temp_multivector.h>
 29: #include "slepc-interface.h"

 31: static void* mv_TempMultiVectorCreateFromBV(void* ii_,BlopexInt n,void* sample)
 32: {
 33:   PetscErrorCode          ierr;
 34:   BV                      bv = (BV)sample;
 35:   Vec                     v;
 36:   PetscInt                i,l,k,nc,useconstr=PETSC_FALSE,flg;
 37:   mv_TempMultiVector      *x;
 38:   mv_InterfaceInterpreter *ii = (mv_InterfaceInterpreter*)ii_;

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

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

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

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

 53:   BVGetActiveColumns(bv,&l,&k);CHKERRABORT(PETSC_COMM_SELF,ierr);
 54:   PetscObjectComposedDataGetInt((PetscObject)bv,slepc_blopex_useconstr,useconstr,flg);CHKERRABORT(PETSC_COMM_SELF,ierr);
 55:   if (!l && useconstr) {
 56:     BVGetNumConstraints(bv,&nc);CHKERRABORT(PETSC_COMM_SELF,ierr);
 57:     l = -nc;
 58:   }
 59:   if (n != k-l) SETERRABORT(PETSC_COMM_SELF,PETSC_ERR_PLIB,"BV active columns plus constraints do not match argument n");
 60:   for (i=0;i<n;i++) {
 61:     BVGetColumn(bv,l+i,&v);CHKERRABORT(PETSC_COMM_SELF,ierr);
 62:     PetscObjectReference((PetscObject)v);CHKERRABORT(PETSC_COMM_SELF,ierr);
 63:     x->vector[i] = (void*)v;
 64:     BVRestoreColumn(bv,l+i,&v);CHKERRABORT(PETSC_COMM_SELF,ierr);
 65:   }
 66:   return x;
 67: }

 69: static void mv_TempMultiPETSCVectorDestroy(void* x_)
 70: {
 71:   mv_TempMultiVector* x = (mv_TempMultiVector*)x_;

 73:   if (!x) return;

 75:   if (x->ownsVectors && x->vector) free(x->vector);
 76:   if (x->mask && x->ownsMask) free(x->mask);
 77:   free(x);
 78: }

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

 90:   return 0;
 91: }

 93: /*
 94:     Change the multivector destructor in order to destroy the multivector
 95:     structure without destroy the PETSc vectors.
 96: */
 97: void SLEPCSetupInterpreterForDignifiedDeath(mv_InterfaceInterpreter *i)
 98: {
 99:   i->DestroyMultiVector = mv_TempMultiPETSCVectorDestroy;
100: }