petsc-3.12.5 2020-03-29
MatGetOperation
Gets a matrix operation for any matrix type.
Synopsis
#include "petscmat.h"
PetscErrorCode MatGetOperation(Mat mat,MatOperation op,void(**f)(void))
Not Collective
Input Parameters
| mat | - the matrix
|
| op | - the name of the operation
|
Output Parameter
f -the function that provides the operation
Usage
PetscErrorCode (*usermult)(Mat,Vec,Vec);
ierr = MatGetOperation(A,MATOP_MULT,(void(**)(void))&usermult);
Notes
See the file include/petscmat.h for a complete list of matrix
operations, which all have the form MATOP_<OPERATION>, where
<OPERATION> is the name (in all capital letters) of the
user interface routine (e.g., MatMult() -> MATOP_MULT).
This routine is distinct from MatShellGetOperation() in that it can be called on any matrix type.
See Also
MatSetOperation(), MatCreateShell(), MatShellGetContext(), MatShellGetOperation()
Level
developer
Location
src/mat/interface/matrix.c
Examples
src/ksp/ksp/examples/tutorials/ex29.c.html
src/ksp/ksp/examples/tutorials/ex34.c.html
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages