1: #include <petsc/private/matimpl.h>
2: #include <../src/mat/impls/aij/seq/aij.h>
4: PetscErrorCode MatDestroySubMatrix_Dummy(Mat C)
5: {
6: Mat_SubSppt *submatj = (Mat_SubSppt *)C->data;
8: submatj->destroy(C);
9: MatDestroySubMatrix_Private(submatj);
10: return 0;
11: }
13: PetscErrorCode MatDestroySubMatrices_Dummy(PetscInt n, Mat *mat[])
14: {
15: /* Destroy dummy submatrices (*mat)[n]...(*mat)[n+nstages-1] used for reuse struct Mat_SubSppt */
16: if ((*mat)[n]) {
17: PetscBool isdummy;
18: PetscObjectTypeCompare((PetscObject)(*mat)[n], MATDUMMY, &isdummy);
19: if (isdummy) {
20: Mat_SubSppt *smat = (Mat_SubSppt *)((*mat)[n]->data); /* singleis and nstages are saved in (*mat)[n]->data */
22: if (smat && !smat->singleis) {
23: PetscInt i, nstages = smat->nstages;
24: for (i = 0; i < nstages; i++) MatDestroy(&(*mat)[n + i]);
25: }
26: }
27: }
29: /* memory is allocated even if n = 0 */
30: PetscFree(*mat);
31: return 0;
32: }
34: PetscErrorCode MatDestroy_Dummy(Mat A)
35: {
36: PetscObjectChangeTypeName((PetscObject)A, NULL);
37: return 0;
38: }
40: /*MC
41: MATDUMMY - A matrix type to be used for reusing specific internal data structure.
43: Level: developer
45: .seealso: `Mat`
46: M*/
48: PETSC_EXTERN PetscErrorCode MatCreate_Dummy(Mat A)
49: {
50: /* matrix ops */
51: PetscMemzero(A->ops, sizeof(struct _MatOps));
52: A->ops->destroy = MatDestroy_Dummy;
53: A->ops->destroysubmatrices = MatDestroySubMatrices_Dummy;
55: /* special MATPREALLOCATOR functions */
56: PetscObjectChangeTypeName((PetscObject)A, MATDUMMY);
57: return 0;
58: }