:orphan:
# MatDenseCUDAGetArrayWrite
Provides write access to the CUDA buffer inside a `MATDENSECUDA` matrix. 
## Synopsis
```
PetscErrorCode MatDenseCUDAGetArrayWrite(Mat A, PetscScalar **a)
```
Not Collective


## Input Parameter

- ***A -*** the matrix



## Output Parameter

- ***a -*** the GPU array in column major order





## Notes
The data on the GPU may not be updated due to operations done on the CPU. If you need updated
data, use `MatDenseCUDAGetArray()`.

The array must be restored with `MatDenseCUDARestoreArrayWrite()` when no longer needed.


## See Also
 `MATDENSECUDA`, `MatDenseCUDAGetArray()`, `MatDenseCUDARestoreArray()`,
`MatDenseCUDARestoreArrayWrite()`, `MatDenseCUDAGetArrayRead()`,
`MatDenseCUDARestoreArrayRead()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/dense/mpi/cupm/cuda/matmpidensecuda.cu.html#MatDenseCUDAGetArrayWrite">src/mat/impls/dense/mpi/cupm/cuda/matmpidensecuda.cu</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/mat/impls/dense/mpi/cupm/cuda/matmpidensecuda.cu)


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