Date: 2013-09-02T10:05:03+00:00

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) 2002-2013, 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 <petscvec.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_TempMultiVectorCreateFromPETScVector(void* ii_,BlopexInt n,void* sample)
     32: {
     33:   int i;
     34:   Vec *vecs = (Vec*)sample;

     36:   mv_TempMultiVector* x;
     37:   mv_InterfaceInterpreter* ii = (mv_InterfaceInterpreter*)ii_;

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

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

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

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

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

     58: static void mv_TempMultiPETSCVectorDestroy(void* x_)
     59: {
     60:   mv_TempMultiVector* x = (mv_TempMultiVector*)x_;

     62:   if (!x) return;

     64:   if (x->ownsVectors && x->vector) free(x->vector);
     65:   if (x->mask && x->ownsMask) free(x->mask);
     66:   free(x);
     67: }

     69: /*
     70:     Create an InterfaceInterpreter using the PETSc implementation
     71:     but overloading CreateMultiVector that doesn't create any
     72:     new vector.
     73: */
     74: int SLEPCSetupInterpreter(mv_InterfaceInterpreter *i)
     75: {
     76:   PETSCSetupInterpreter(i);
     77:   i->CreateMultiVector = mv_TempMultiVectorCreateFromPETScVector;

     79:   return 0;
     80: }

     82: /*
     83:     Change the multivector destructor in order to destroy the multivector
     84:     structure without destroy the PETSc vectors.
     85: */
     86: void SLEPCSetupInterpreterForDignifiedDeath(mv_InterfaceInterpreter *i)
     87: {
     88:   i->DestroyMultiVector = mv_TempMultiPETSCVectorDestroy;
     89: }