This was formerly part of the
lib/fit library. Further migrations and renamings are expected.
fpromise::promise, fpromise::future, fpromise::executor, etc.
- When writing asynchronous event-driven programs, it's convenient to be able to stage a sequence of asynchronous tasks. This tends to be challenging to implement in a callback-driven manner due to object lifetime issues, so we would like an alternative pattern that is easier to apply correctly, such as by expressing asynchronous logic as a compositions of futures.
- The C++ 14 standard library offers
std::future but it is tied to a thread-based execution model. Awaiting a future requires blocking, which is bad for event loops.
- So libfit offers a family of APIs that work better with event loops.