✨ elfyn

Event-loop framework for C++ applications.

🎯 Goals

• Simple, ergonomic API
• Cross-platform (epoll, kqueue [TODO], freertos [TODO])
• Heapless runtime-capable (based on std::function optimizations)
• Minimal dependencies, only requiring libstdc++
• Trivial build integration

🧝 Usage

The elfyn namespace declares a few types:

• Event, which is a generic wrapper on a file-descriptor or other OS-specific identifier for I/O operations. There are specialized subclasses for:
  • Io, which is useful on sockets, files, etc.
  • Timer, providing adjustable intervals for periodic actions
  • Notifier, which can be used for signaling between threads

The application can use elfyn::add() for each event to be handled, and other methods such as elfyn::every() and elfyn::after() allow periodic actions to be initiated without declaring timer events.

The run() method transfers control to the event-loop for the specified amount of time (or indefinitely, if not specified). When run() returns false, the event-loop has stopped and any cleanup can be done prior to exiting the application or thread. Multi-threaded applications should call quit() to signal that event-loops outside of the main thread should be shut-down.

🛠️ Building

A Makefile is provided which uses the maketh set of macros, and you can do the same in your project - or, simply compile the handful of sources required for your platform. See Makefile for details; the basic list is inc/elfyn/elfyn.hpp and the .cpp file for the desired event back-end (e.g. src/epoll/elfyn-epoll.cpp).

⌛️ Examples / Tests

See the test/ subdirectory (more to be added)

License

Creative Commons (CC BY) Michael Fairman mfairman@tegimeki.com