# VecViennaCLRestoreCLMemWrite
Restores a CL buffer pointer previously acquired with VecViennaCLGetCLMemWrite(). 
## Synopsis
```
#include "petscvec.h" 
PETSC_EXTERN PetscErrorCode VecViennaCLRestoreCLMemWrite(Vec v)
```
This marks the host data as out of date.  Subsequent access to the
vector data on the host side with for instance VecGetArray() incurs a
data transfer.


## Input Parameters

- ***v    -*** the vector





## See Also
 `VecViennaCLGetCLContext()`, `VecViennaCLGetCLMemWrite()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx.html#VecViennaCLRestoreCLMemWrite">src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx)


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