Futures which pause the calling thread can be used to solve some of the synchronization issues mentioned: https://en.wikipedia.org/wiki/Futures_and_promises ht

Futures which pause the calling thread can be used to solve some of the synchronization issues mentioned: https://en.wikipedia.org/wiki/Futures_and_promises https://en.wikipedia.org/wiki/Futures_and_promises Here's an example of this in Objective-C: https://github.com/stevedekorte/ActorKit https://github.com/stevedekorte/ActorKit