Actual source code: mpiaijbaij.c
2: #include <../src/mat/impls/baij/mpi/mpibaij.h>
3: #include <../src/mat/impls/aij/mpi/mpiaij.h>
4: #include <petsc/private/matimpl.h>
5: #include <petscmat.h>
7: PETSC_INTERN PetscErrorCode MatConvert_SeqAIJ_SeqBAIJ_Preallocate(Mat, PetscInt **);
9: PETSC_INTERN PetscErrorCode MatConvert_MPIAIJ_MPIBAIJ(Mat A, MatType newtype, MatReuse reuse, Mat *newmat)
10: {
11: Mat M;
12: Mat_MPIAIJ *mpimat = (Mat_MPIAIJ *)A->data;
13: PetscInt *d_nnz, *o_nnz;
14: PetscInt m, n, lm, ln, bs = PetscAbs(A->rmap->bs);
16: if (reuse != MAT_REUSE_MATRIX) {
17: PetscBool3 sym = A->symmetric, hermitian = A->hermitian, structurally_symmetric = A->structurally_symmetric, spd = A->spd;
18: MatDisAssemble_MPIAIJ(A);
19: MatGetSize(A, &m, &n);
20: MatGetLocalSize(A, &lm, &ln);
21: MatConvert_SeqAIJ_SeqBAIJ_Preallocate(mpimat->A, &d_nnz);
22: MatConvert_SeqAIJ_SeqBAIJ_Preallocate(mpimat->B, &o_nnz);
23: MatCreate(PetscObjectComm((PetscObject)A), &M);
24: MatSetSizes(M, lm, ln, m, n);
25: MatSetType(M, MATMPIBAIJ);
26: MatSeqBAIJSetPreallocation(M, bs, 0, d_nnz);
27: MatMPIBAIJSetPreallocation(M, bs, 0, d_nnz, 0, o_nnz);
28: PetscFree(d_nnz);
29: PetscFree(o_nnz);
30: MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY);
31: MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY);
32: A->symmetric = sym;
33: A->hermitian = hermitian;
34: A->structurally_symmetric = structurally_symmetric;
35: A->spd = spd;
36: } else M = *newmat;
38: /* reuse may not be equal to MAT_REUSE_MATRIX, but the basic converter will reallocate or replace newmat if this value is not used */
39: /* if reuse is equal to MAT_INITIAL_MATRIX, it has been appropriately preallocated before */
40: /* MAT_INPLACE_MATRIX, it will be replaced with MatHeaderReplace below */
41: MatConvert_Basic(A, newtype, MAT_REUSE_MATRIX, &M);
43: if (reuse == MAT_INPLACE_MATRIX) {
44: MatHeaderReplace(A, &M);
45: } else *newmat = M;
46: return 0;
47: }