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: PetscFunctionBegin;
17: if (reuse != MAT_REUSE_MATRIX) {
18: PetscBool3 sym = A->symmetric, hermitian = A->hermitian, structurally_symmetric = A->structurally_symmetric, spd = A->spd;
19: PetscCall(MatDisAssemble_MPIAIJ(A));
20: PetscCall(MatGetSize(A, &m, &n));
21: PetscCall(MatGetLocalSize(A, &lm, &ln));
22: PetscCall(MatConvert_SeqAIJ_SeqBAIJ_Preallocate(mpimat->A, &d_nnz));
23: PetscCall(MatConvert_SeqAIJ_SeqBAIJ_Preallocate(mpimat->B, &o_nnz));
24: PetscCall(MatCreate(PetscObjectComm((PetscObject)A), &M));
25: PetscCall(MatSetSizes(M, lm, ln, m, n));
26: PetscCall(MatSetType(M, MATMPIBAIJ));
27: PetscCall(MatSeqBAIJSetPreallocation(M, bs, 0, d_nnz));
28: PetscCall(MatMPIBAIJSetPreallocation(M, bs, 0, d_nnz, 0, o_nnz));
29: PetscCall(PetscFree(d_nnz));
30: PetscCall(PetscFree(o_nnz));
31: PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY));
32: PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY));
33: A->symmetric = sym;
34: A->hermitian = hermitian;
35: A->structurally_symmetric = structurally_symmetric;
36: A->spd = spd;
37: } else M = *newmat;
39: /* reuse may not be equal to MAT_REUSE_MATRIX, but the basic converter will reallocate or replace newmat if this value is not used */
40: /* if reuse is equal to MAT_INITIAL_MATRIX, it has been appropriately preallocated before */
41: /* MAT_INPLACE_MATRIX, it will be replaced with MatHeaderReplace below */
42: PetscCall(MatConvert_Basic(A, newtype, MAT_REUSE_MATRIX, &M));
44: if (reuse == MAT_INPLACE_MATRIX) {
45: PetscCall(MatHeaderReplace(A, &M));
46: } else *newmat = M;
47: PetscFunctionReturn(PETSC_SUCCESS);
48: }