# wqking/eventpp

Event Dispatcher and callback list for C++

Repository: https://github.com/wqking/eventpp
Canonical: https://ross.abutalabs.com/products/eventpp
Language: C++
License: NOASSERTION
License Family: other
Topics: header-only, event-dispatcher, callback, signal, slot, observer-pattern, publish-subscribe, thread-safe, nested-events, cpp11
Last push: 2024-12-08T06:54:28+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3034, "days_push": 633, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1681, forks 260 (observed 2026-08-28T04:05:21.622477+00:00)

## What it is
eventpp is a header-only C++11 library providing event dispatchers, callback lists, and event queues for implementing signal-slot, publisher-subscriber, and observer patterns. It is thread-safe, supports nested events, and is mature and production-ready.

## Use cases
- implement signal and slot mechanism in C++
- build publish-subscribe event systems
- implement observer pattern without base class inheritance
- dispatch events asynchronously via an event queue
- handle events safely across multiple threads
- add event filters and one-shot listeners to C++ applications

## When to choose
- you need a lightweight, header-only event system in C++11 or later
- you require thread-safe and exception-safe event dispatching
- you want to avoid dependencies and build steps
- you need high-performance event processing (millions of events per second)

## When to avoid
- your project is not written in C++
- you need a full-featured reactive programming framework with operators
- you rely on Qt signals/slots and already have Qt in your stack

## Facets
- artifact type: library
- maturity: stable
- function: middleware, developer-tools
- domain: developer-tools, cross-platform
- platform: cpp, cross-platform
- tags: header-only, event-dispatcher, callback-list, signal-slot, observer-pattern, publish-subscribe, thread-safe, event-queue, cpp11

## Member repositories
- wqking/eventpp (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:21.622477+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:41:27.046675+00:00, confidence not recorded.
  - readme: https://github.com/wqking/eventpp (fetched 2026-08-28T04:05:21.622477+00:00, sha 9e8194f1ecb9)
- Data as of 2026-08-30T08:39:29.467469+00:00.