kaidokert / krabitls-rs / 30758434247

85%

Build Type

push

github

Committed by web-flow

Commit Message

Non-blocking TlsStream::try_read for event-loop use (#121)

* Add non-blocking TlsStream::try_read for event-loop use

A blocking `TlsStream::read` parks the whole network stack for the idle
interval, so a single-threaded event loop (service the stack, react to inbound,
fire timers) can't interleave TLS reads with other work — the concrete blocker
for servicing an MQTT session between keepalives.

`Transport` gains `read_nb` (nb-free: `Ok(Some(n))` = bytes, `Ok(None)` = nothing
yet); its default delegates to the blocking `read`, so existing transports are
unchanged. `TlsStream::try_read` is the blocking `read` loop with a non-blocking
`Recv` arm — it returns `Ok(None)` on would-block instead of parking, while still
servicing outbound TLS records. No engine change (it's already sans-io).

Coverage Stats

19 of 34 new or added lines in 2 files covered. (55.88%)

101 existing lines in 2 files now uncovered.

5029 of 5927 relevant lines covered (84.85%)

157.96 hits per line