Consider the CUDA API function
CUresult cuMemcpy3DAsync (const CUDA_MEMCPY3D* pCopy, CUstream hStream);
described here.
It takes a CUDA_MEMCPY3D structure by pointer ; and this pointer is not to some CUDA-driver-created entity - it's to a structure the user has created.
My question: Do we need to keep the pointed-to structure alive past the call to this function returning? e.g. until after we've sycnrhonized the stream we've enqueued the copy on? Or - can we just discard it immediately? I'm guessing it should be the former, but the documentation doesn't really say.