PETSc version 3.17.0
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# PetscObjectComposedDataRegister

Get an available id for composed data

### Synopsis

    #include "petscsys.h"
    PetscErrorCode PetscObjectComposedDataRegister(PetscInt *id)

Not Collective

### Output parameter

| id | - an identifier under which data can be stored

### Notes

You must keep this value (for example in a global variable) in order to attach the data to an object or access in an object.

seealso: PetscObjectComposedDataSetInt()

### Level

developer

### Location

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