Informed poll
4 hours ago
- #embedded-systems
- #asynchronous-programming
- #pw_async2
- Informed poll is the core design philosophy behind pw_async2, offering an efficient alternative to callback-based async programming.
- Tasks represent asynchronous work, with a Dispatcher polling them to check for progress readiness.
- Tasks communicate their state via Pend() method returns: Ready() if finished, Pending() if waiting.
- Wakers enable 'informed' polling by notifying the Dispatcher when a task is ready to proceed.
- pw_async2 is designed for embedded systems, emphasizing efficiency and no dynamic memory allocation.
- The model is similar to Rust's Future trait but lacks formal semantics, with plans to narrow this gap.