tree b903c8add2d7e784a20c494568b167fb592ddc93
parent 8fb2b0df3a622dfcc7733304f91fca02889704ec
author Marie Janssen <jamuraa@google.com> 1790021968 +0000
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1791409742 -0700

rust/bt-common: Add debug events and background tasks

Add event streaming, dynamic background stream management, and a debug
harness to bt-common.

Debug tools often need to continuously run background work and deliver
messages and/or structured events, instead of only doing work
only when commands are sent.

Add Event to the CommandRunner trait and a method to set persistent
streams which will be polled in the background and can deliver messages
or structured events using RunnerEvent.  Events are optional but each
CommandRunner implementation myst at least define type Event = ()

RunnerBackground<E> manages dynamic keyed or anonymous background streams,
display messages, and structured events.

Test: cargo test --workspace
Change-Id: I2200a0d21a679d0e2f6d380c5156213c6a6a6964
Reviewed-on: https://bluetooth-review.googlesource.com/c/bluetooth/+/4141