This is a feature I found useful to have while writing Nova driver code
that accessed registers alongside other operations. I would find myself
quite confused about whether the guard was held or dropped at a given
point of the code, and it felt like walking through a minefield; this
pattern makes things safer and easier to read according to my experience
writing nova-core code.
Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
---
Changes in v2:
- Use FnOnce for the callback type.
- Rename to try_access_with.
- Don't assume that users will want to map failure to ENXIO and return
an option.
- Use a single method and let users adapt the behavior using their own
wrappers/macros.
---
Alexandre Courbot (2):
rust/revocable: add try_access_with() convenience method
samples: rust: convert PCI rust sample driver to use try_access_with()
rust/kernel/revocable.rs | 16 ++++++++++++++++
samples/rust/rust_driver_pci.rs | 11 +++++------
2 files changed, 21 insertions(+), 6 deletions(-)
---
base-commit: 7eb172143d5508b4da468ed59ee857c6e5e01da6
change-id: 20250313-try_with-cc9f91dd3b60
Best regards,
--
Alexandre Courbot <acourbot@xxxxxxxxxx>
