cudaError_t cudaGraphicsResourceGetMappedPointer ( void **  devPtr,
size_t *  size,
cudaGraphicsResource_t  resource 

Returns in *devPtr a pointer through which the mapped graphics resource resource may be accessed. Returns in *size the size of the memory in bytes which may be accessed from that pointer. The value set in devPtr may change every time that resource is mapped.

If resource is not a buffer then it cannot be accessed via a pointer and cudaErrorUnknown is returned. If resource is not mapped then cudaErrorUnknown is returned. *

devPtr - Returned pointer through which resource may be accessed
size - Returned size of the buffer accessible starting at *devPtr
resource - Mapped resource to access
cudaSuccess, cudaErrorInvalidValue, cudaErrorInvalidResourceHandle, cudaErrorUnknown
Note that this function may also return error codes from previous, asynchronous launches.
See also:
cudaGraphicsMapResources, cudaGraphicsSubResourceGetMappedArray

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