# VecCUDAPlaceArray
Allows one to replace the GPU array in a vector with a GPU array provided by the user. This is useful to avoid copying an array into a vector. 
## Synopsis
```
#include "petscvec.h"   
PetscErrorCode VecCUDAPlaceArray(Vec vin, const PetscScalar a[])
```
Not Collective


## Input Parameters

- ***vec -*** the vector
- ***array -*** the GPU array



## Notes
You can return to the original GPU array with a call to VecCUDAResetArray()
It is not possible to use VecCUDAPlaceArray() and VecPlaceArray() at the
same time on the same vector.

`vec` does not take ownership of `array` in any way. The user must free `array` themselves
but be careful not to do so before the vector has either been destroyed, had its original
array restored with `VecCUDAResetArray()` or permanently replaced with
`VecCUDAReplaceArray()`.




## See Also
 `VecPlaceArray()`, `VecGetArray()`, `VecRestoreArray()`, `VecReplaceArray()`, `VecResetArray()`, `VecCUDAResetArray()`, `VecCUDAReplaceArray()`


## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/interface/rvector.c.html#VecCUDAPlaceArray">src/vec/vec/interface/rvector.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/vec/interface/rvector.c)


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