Worker half of the Wave 3 size/backpressure + write-ordering pass:
- IPC-02: the worker adopts GatewayHello.max_frame_bytes during the handshake
(WorkerFrameProtocolOptions.AdoptNegotiatedMaxMessageBytes) instead of a
hard-coded default; 0 keeps the default, a value above a 256 MiB ceiling is
rejected. Reader and writer share the options instance, applied before the
message loop.
- IPC-04: DrainEvents caps each reply at MaxDrainEventsPerReply (10_000) and
treats max_events = 0 as that cap rather than 'drain the entire queue', so one
diagnostic drain cannot pack a session-killing reply frame.
- WRK-04: WorkerFrameWriter stamps the envelope Sequence at the actual point of
writing (under the write lock) instead of at envelope creation, so the on-wire
order and the stamped sequence always agree under concurrent producers.
- WRK-07: the writer is now a cooperative priority scheduler — callers enqueue at
Control or Event priority and the draining lock-holder writes all control
frames before any event frame, so replies/faults/heartbeats jump ahead of an
event backlog. Per-frame validation/size rejections fail only that frame; a
stream write failure fails all queued frames.
Tests: monotonic gap-free sequence under concurrency, control-before-event
priority (gated stream), negotiated-max adoption, DrainEvents zero-bound.
Worker builds x86 only — verified on windev.
Joseph Doherty