:orphan:
# PetscDeviceCopyMode
Describes the copy direction of a device-aware `memcpy` 
## Synopsis
```
#include <petscdevicetypes.h> 
typedef enum {
  PETSC_DEVICE_COPY_HTOH,
  PETSC_DEVICE_COPY_DTOH,
  PETSC_DEVICE_COPY_HTOD,
  PETSC_DEVICE_COPY_DTOD,
  PETSC_DEVICE_COPY_AUTO,
} PetscDeviceCopyMode;
```

## Values

- ***`PETSC_DEVICE_COPY_HTOH` -*** Copy from host memory to host memory
- ***`PETSC_DEVICE_COPY_DTOH` -*** Copy from device memory to host memory
- ***`PETSC_DEVICE_COPY_HTOD` -*** Copy from host memory to device memory
- ***`PETSC_DEVICE_COPY_DTOD` -*** Copy from device memory to device memory
- ***`PETSC_DEVICE_COPY_AUTO` -*** Infer the copy direction from the pointers





## See Also
 `PetscDeviceArrayCopy()`, `PetscDeviceMemcpy()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petscdevicetypes.h.html#PetscDeviceCopyMode">include/petscdevicetypes.h</A>


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