Sub-views of CudaSlices

[Corey Lowman]

Would be similar to slices of Vecs.

Ideal interface would be:

let a: CudaSlice<f32> = ...;
let b: CudaSlice<f32> = a.offset(123);

where offset would panic if there aren't enough elements, otherwise make a copy of the device pointer.

Scenarios to figure out:

let a: CudaSlice<f32> = ...;
let b: CudaSlice<f32> = a.offset(123);
drop(a);
// b should still be valid here, so the underlying device pointer should not be dropped

[Corey Lowman]

It might not be sound to return CudaSlice instances. e.g.:

let a: CudaSlice<f32> = dev.alloc_zeros_async(1000);
let mut b: CudaSlice<f32> = a.slice(100..200);
let mut c: CudaSlice<f32> = a.slice(150..300);
f.launch_async(cfg, (&mut b, &mut c));

would mutate the same indices of b and c.

would be safer to do something like:

let a: CudaSlice<f32> = dev.alloc_zeros_async(1000);
let mut b: &CudaView<f32> = a.slice(100..200);
let mut c: &mut CudaView<f32> = a.slice_mut(150..300);
f.launch_async(cfg, (&mut b, &mut c));

[Corey Lowman]

Perhaps add/slice could return something like a Cow object?