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);
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_, where 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


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