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) 2002-2010, Universidad Politecnica de Valencia, Spain
9: This file is part of SLEPc.
10:
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 "petscsys.h"
26: #include "petscvec.h"
27: #include "petscmat.h"
28: #include <assert.h>
29: #include <stdlib.h>
30: #include "petscblaslapack.h"
31: #include "interpreter.h"
32: #include "temp_multivector.h"
33: #include "slepc-interface.h"
35: static void* mv_TempMultiVectorCreateFromPETScVector( void* ii_, int n, void* sample )
36: {
37: int i;
38: Vec *vecs = (Vec*)sample;
40: mv_TempMultiVector* x;
41: mv_InterfaceInterpreter* ii = (mv_InterfaceInterpreter*)ii_;
43: x = (mv_TempMultiVector*) malloc(sizeof(mv_TempMultiVector));
44: assert( x != NULL );
45:
46: x->interpreter = ii;
47: x->numVectors = n;
48:
49: x->vector = (void**) calloc( n, sizeof(void*) );
50: assert( x->vector != NULL );
52: x->ownsVectors = 1;
53: x->mask = NULL;
54: x->ownsMask = 0;
56: for ( i = 0; i < n; i++ ) {
57: x->vector[i] = (void*)vecs[i];
58: }
60: return x;
61: }
63: static void mv_TempMultiPETSCVectorDestroy( void* x_ )
64: {
65: mv_TempMultiVector* x = (mv_TempMultiVector*)x_;
67: if ( x == NULL )
68: return;
70: if ( x->ownsVectors && x->vector != NULL ) {
71: free(x->vector);
72: }
73: if ( x->mask && x->ownsMask )
74: free(x->mask);
75: free(x);
76: }
79: /*
80: Create an InterfaceInterpreter using the PETSc implementation
81: but overloading CreateMultiVector that doesn't create any
82: new vector.
83: */
84: int SLEPCSetupInterpreter( mv_InterfaceInterpreter *i )
85: {
86: PETSCSetupInterpreter(i);
87: i->CreateMultiVector = mv_TempMultiVectorCreateFromPETScVector;
89: return 0;
90: }
92: /*
93: Change the multivector destructor in order to destroy the multivector
94: structure without destroy the PETSc vectors.
95: */
96: void SLEPCSetupInterpreterForDignifiedDeath( mv_InterfaceInterpreter *i )
97: {
98: i->DestroyMultiVector = mv_TempMultiPETSCVectorDestroy;
99: }