PETSC_EXTERN PetscErrorCode MatHeaderReplace(Mat A,Mat C)
{
PetscErrorCode ierr;
PetscInt refct;
PetscFunctionBegin;
PetscValidHeaderSpecific(A,MAT_CLASSID,1);
PetscValidHeaderSpecific(C,MAT_CLASSID,2);
if (A == C) PetscFunctionReturn(0);
PetscCheckSameComm(A,1,C,2);
if (((PetscObject)C)->refct != 1) SETERRQ1(PetscObjectComm((PetscObject)C),PETSC_ERR_ARG_WRONGSTATE,"Object C has refct %D > 1, would leave hanging reference",((PetscObject)C)->refct);
/* free all the interior data structures from mat */
ierr = (*A->ops->destroy)(A);CHKERRQ(ierr);
ierr = PetscHeaderDestroy_Private((PetscObject)A);CHKERRQ(ierr);
ierr = PetscFree(A->ops);CHKERRQ(ierr);
ierr = PetscLayoutDestroy(&A->rmap);CHKERRQ(ierr);
ierr = PetscLayoutDestroy(&A->cmap);CHKERRQ(ierr);
ierr = PetscFree(A->spptr);CHKERRQ(ierr);
/* copy C over to A */
refct = ((PetscObject)A)->refct;
ierr = PetscMemcpy(A,C,sizeof(struct _p_Mat));CHKERRQ(ierr);
((PetscObject)A)->refct = refct;
ierr = PetscFree(C);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
PetscErrorCode MatHeaderReplace(Mat A,Mat C)
{
PetscErrorCode ierr;
PetscFunctionBegin;
if (A == C) PetscFunctionReturn(0);
/* free all the interior data structures from mat */
ierr = (*A->ops->destroy)(A);CHKERRQ(ierr);
ierr = PetscHeaderDestroy_Private((PetscObject)A);CHKERRQ(ierr);
ierr = PetscFree(A->ops);CHKERRQ(ierr);
ierr = PetscLayoutDestroy(A->rmap);CHKERRQ(ierr);
ierr = PetscLayoutDestroy(A->cmap);CHKERRQ(ierr);
ierr = PetscFree(A->spptr);CHKERRQ(ierr);
/* copy C over to A */
if (C) {
ierr = PetscMemcpy(A,C,sizeof(struct _p_Mat));CHKERRQ(ierr);
ierr = PetscLogObjectDestroy((PetscObject)C);CHKERRQ(ierr);
ierr = PetscFree(C);CHKERRQ(ierr);
}
PetscFunctionReturn(0);
}
