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: }