PETSc version 3.15.5
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/tutorials/ex29.c.html
src/ksp/ksp/tutorials/ex34.c.html
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages