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# PetscSFWindowSetSyncType
Set synchronization type for `PetscSF` communication of type  `PETSCSFWINDOW` 
## Synopsis
```
#include "petscsf.h" 
PetscErrorCode PetscSFWindowSetSyncType(PetscSF sf, PetscSFWindowSyncType sync)
```
Logically Collective


## Input Parameters

- ***sf -*** star forest for communication
- ***sync -*** synchronization type



## Options Database Key

- ***-sf_window_sync <sync> -*** sets the synchronization type FENCE, LOCK, or ACTIVE (see `PetscSFWindowSyncType`)





## See Also
  `PetscSF`, `PETSCSFWINDOW`, `PetscSFSetFromOptions()`, `PetscSFWindowGetSyncType()`, `PetscSFWindowSyncType`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/sf/impls/window/sfwindow.c.html#PetscSFWindowSetSyncType">src/vec/is/sf/impls/window/sfwindow.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/sf/impls/window/sfwindow.c.html#PetscSFWindowSetSyncType_Window">PetscSFWindowSetSyncType_Window in src/vec/is/sf/impls/window/sfwindow.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/is/sf/impls/window/sfwindow.c)


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