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from_handle constructors need to allow managing ownership #1187
Description
Currently all objects in cuda.core have a from_handle constructor (#192), allowing constructing the object from an underlying C handle allocated elsewhere. However, currently this gives a view-only semantics, and could not help manage the handle lifetime. It'd be nice to have a kw(-only) argument added that allows optionally handling the lifetime, or even acquiring the ownership.
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[-]`from_handle` constructor needs to allow managing ownership[/-][+]`from_handle` constructors need to allow managing ownership[/+]stiepan commentedon Mar 10, 2026
A comment on UX. For quite some time, I was convinced there's no way to tie the lifetime of external stream instance to cuda.core's Stream. Reading Stream documentation falsely reassured me in that - the from_handle only accepts a raw ptr. Turns out you can do this: pass to
Device.create_streaman object that implements__cuda_stream__protocol (so oftentimes a custom wrapper), but I've learnt that accidentaly after quite some time of working with cuda.core.