The Event Loop

The core of mio is the EventLoop API.

The lifecycle of an event loop involves:

• Creating a new event loop (EventLoop::new or EventLoop::configured)
• Registering interest in events (EventLoop::register)
  • An IOHandle is Readable or Writable
  • A timer expired
  • A signal was delivered
  • A message was sent to the event loop
• Running the event loop with a Handler, waiting for events (EventLoop::run or EventLoop::run_once)
• Sending a message to the event loop (EventLoop::channel().send())
• Shutting down the event loop (EventLoop::shutdown)

When the event loop is shut down, it will finish sending any pending messages to the registered handler, and return Ok(handler) from the original call to EventLoop::run().