mirror of
https://github.com/rustfs/rustfs.git
synced 2026-09-06 12:09:12 +00:00
1dd81cf276
Add `tee_reader` / `tee_reader_with_options` in `rustfs-rio`: a `TeePrimary` that drives the source and a `TeeSecondary` that observes an identical copy of every chunk through a byte-bounded queue. The primary returns `Pending` when the queue is full, so both sides advance at the pace of the slowest consumer; it is meant for small objects only. Termination: source EOF and errors propagate to the secondary with the same `io::ErrorKind`; dropping the secondary turns the primary into a pass-through; dropping the primary early fails the secondary with `BrokenPipe` by default, or hands the remaining source to a background drain task bounded by `max_drain_bytes` when `TeeOptions::drain_on_primary_drop` is set. `TeeSecondary::into_stream` exposes the queued `Bytes` chunks without an extra copy. Includes a proptest equivalence test, backpressure, error, drop, drain-limit and cancel-safety tests, and a criterion bench comparing tee throughput against a direct read (64 MiB in 1 MiB chunks).