:orphan:
# DMLabelPropagatePush
Tear down a cycle of label propagation 
## Synopsis
```
#include "petscdmlabel.h"   
#include "petscsection.h"   
PetscErrorCode DMLabelPropagatePush(DMLabel label, PetscSF pointSF, PetscErrorCode (*markPoint)(DMLabel, PetscInt, PetscInt, void *), void *ctx)
```
Collective


## Input Parameters

- ***label     -*** The `DMLabel` to propagate across processes
- ***sf        -*** The `PetscSF` describing parallel layout of the label points
- ***markPoint -*** An optional callback that is called when a point is marked, or `NULL`
- ***ctx       -*** An optional user context for the callback, or `NULL`



## Calling sequence of `markPoint`
```none
PetscErrorCode markPoint(DMLabel label, PetscInt p, PetscInt val, void *ctx);
```

- ***label -*** The `DMLabel`
- ***p     -*** The point being marked
- ***val   -*** The label value for `p`
- ***ctx   -*** An optional user context





## See Also
 `DMLabel`, `DM`, `DMLabelPropagateBegin()`, `DMLabelPropagateEnd()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/label/dmlabel.c.html#DMLabelPropagatePush">src/dm/label/dmlabel.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/label/dmlabel.c)


[Index of all DMLabel routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)