Module sample 

Time, the envelope, and the values a read returns (ridl §3.1, §4.5, §9), with the two computations a consuming runtime makes on an envelope: a value’s freshness (Freshness::of) and event loss (EventSeqTracker).

Structs

Duration

A length of time, in microseconds.

Envelope

The sender’s timestamp and sequence number (ridl §3.1). The runtime stamps it from its clock, and no relay changes it.

EventSeqTracker

The last seq accepted on each event channel of one session, and the loss each new occurrence reveals (ridl §3.1; frame specification §5.2 and §7).

Occurrence

An event occurrence as a consumer receives it.

Sample

A signal value with its provenance, its freshness and its envelope.

Timestamp

A point in time, in microseconds since the PTP epoch, on the TAI time scale (ridl §3.1).

TrackerFull

The error EventSeqTracker::observe returns when the occurrence is on a channel the tracker does not hold and every one of its N slots is taken.

Enums

Cause

Why a channel is invalid.

Continuity

What EventSeqTracker::observe found when it compared an occurrence’s seq with the last one its channel accepted (ridl §3.1; frame specification §7).

Detection

What a consumer’s binding detected in a payload.

Freshness

How old a value is, measured against its staleness bound (ridl §9).

Provenance

Where a signal’s value comes from (ridl §4.5).