cuPointerGetAttribute: Returns information about a pointer

In duncantl/RCUDA: R Bindings for the CUDA Library for GPU Computing

Description

If the current CUcontext does not support unified virtual addressing then CUDA_ERROR_INVALID_CONTEXT is returned.

- CU_POINTER_ATTRIBUTE_DEVICE_POINTER:

Returns the device pointer value through which ptr may be accessed by kernels running in the current CUcontext. The type of data must be CUdeviceptr *.

If there exists no device pointer value through which kernels running in the current CUcontext may access ptr then CUDA_ERROR_INVALID_VALUE is returned.

If there is no current CUcontext then CUDA_ERROR_INVALID_CONTEXT is returned.

Except in the exceptional disjoint addressing cases discussed below, the value returned will equal the input value ptr.

- CU_POINTER_ATTRIBUTE_HOST_POINTER:

Returns the host pointer value through which ptr may be accessed by by the host program. The type of data must be void **. If there exists no host pointer value through which the host program may directly access ptr then CUDA_ERROR_INVALID_VALUE is returned.

Except in the exceptional disjoint addressing cases discussed below, the value returned will equal the input value ptr.

Usage

cuPointerGetAttribute(data, attribute, ptr)

Arguments

data	Returned pointer attribute value
attribute	Pointer attribute to query
ptr	Pointer

References

http://docs.nvidia.com/cuda/cuda-driver-api/index.html

See Also

cuMemAlloc cuMemFree cuMemAllocHost cuMemFreeHost cuMemHostAlloc cuMemHostRegister cuMemHostUnregister

duncantl/RCUDA documentation built on May 15, 2019, 5:26 p.m.