PETSc version 3.17.4
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# PetscObjectGetClassId

Gets the classid for any PetscObject

### Synopsis

    #include "petscsys.h"
    PetscErrorCode  PetscObjectGetClassId(PetscObject obj,PetscClassId *classid)

Not Collective

### Input Parameter

| obj | - any PETSc object, for example a Vec, Mat or KSP. Thus must be cast with a (PetscObject), for example, PetscObjectGetClassId((PetscObject)mat,&classid);

### Output Parameter

| classid | - the classid

### Level

developer

### Location

src/sys/objects/gcookie.c
Index of all Sys routines
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