Date: 2024-04-26T10:21:46+00:00

Actual source code: slepc-interface.c
slepc-3.21.1 2024-04-26
Report Typos and Errors

      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain

      6:    This file is part of SLEPc.
      7:    SLEPc is distributed under a 2-clause BSD license (see LICENSE).
      8:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      9: */
     10: /*
     11:    Modification of the *temp* implementation of the BLOPEX multivector in order
     12:    to wrap created PETSc vectors as multivectors.
     13: */

     15: #include <slepc/private/bvimpl.h>
     16: #include <stdlib.h>
     17: #include <interpreter.h>
     18: #include <temp_multivector.h>
     19: #include "blopex.h"

     21: static void* mv_TempMultiVectorCreateFromBV(void* ii_,BlopexInt n,void* sample)
     22: {
     23:   BV                      bv = (BV)sample;
     24:   Vec                     v;
     25:   PetscInt                i,l,k,nc,useconstr=PETSC_FALSE,flg;
     26:   mv_TempMultiVector      *x;
     27:   mv_InterfaceInterpreter *ii = (mv_InterfaceInterpreter*)ii_;

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

     32:   x->interpreter = ii;
     33:   x->numVectors  = n;

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

     38:   x->ownsVectors = 1;
     39:   x->mask = NULL;
     40:   x->ownsMask = 0;

     42:   PetscCallAbort(PETSC_COMM_SELF,BVGetActiveColumns(bv,&l,&k));
     43:   PetscCallAbort(PETSC_COMM_SELF,PetscObjectComposedDataGetInt((PetscObject)bv,slepc_blopex_useconstr,useconstr,flg));
     44:   if (!l && flg && useconstr) {
     45:     PetscCallAbort(PETSC_COMM_SELF,BVGetNumConstraints(bv,&nc));
     46:     l = -nc;
     47:   }
     48:   if (n != k-l) SETERRABORT(PETSC_COMM_SELF,PETSC_ERR_PLIB,"BV active columns plus constraints do not match argument n");
     49:   for (i=0;i<n;i++) {
     50:     PetscCallAbort(PETSC_COMM_SELF,BVGetColumn(bv,l+i,&v));
     51:     PetscCallAbort(PETSC_COMM_SELF,PetscObjectReference((PetscObject)v));
     52:     x->vector[i] = (void*)v;
     53:     PetscCallAbort(PETSC_COMM_SELF,BVRestoreColumn(bv,l+i,&v));
     54:   }
     55:   return x;
     56: }

     58: /*
     59:     Create an InterfaceInterpreter using the PETSc implementation
     60:     but overloading CreateMultiVector that doesn't create any
     61:     new vector.
     62: */
     63: int SLEPCSetupInterpreter(mv_InterfaceInterpreter *i)
     64: {
     65:   PETSCSetupInterpreter(i);
     66:   i->CreateMultiVector = mv_TempMultiVectorCreateFromBV;

     68:   return 0;
     69: }