std::metrics

Status: experimental

Prometheus-compatible primitives (Counter, Gauge, Histogram) and a Registry rendering the standard text-exposition format.

API details and source

The implementation source contains the complete declarations and implementation notes. The table below lists canonical Gossamer call signatures; every item name links directly to its implementation file.

Item	Canonical signature or declaration	Description
Counter	type Counter	Monotonic-increasing u64 counter (lock-free).
Gauge	type Gauge	Set / inc / dec gauge (lock-free).
Histogram	type Histogram	Bucketed observation histogram with sum and count.
Metric	type Metric	Enum holding any of the three primitives for registry storage.
Registry	type Registry	Ordered collection of metrics; render() emits the Prometheus text-exposition format.
serve_metrics	fn serve_metrics(addr: String) -> Result<(), errors::Error>	Mounts a registry on /metrics over the existing http server loop.