lixiasky

Thanks for the catch! You’re spot on about the missed wakeups. It's still a very early prototype—mainly just wanted to see if this whole architecture holds water. I'll definitely be adding the #StoreLoad fence and tightening up the memory ordering in the next push. Appreciate the feedback!

I didn't realize the mods had un-killed this post yesterday, so my apologies for the late replies. I'm very grateful to them for doing that—I just only now saw that it was live.

Haha, point taken! I will try to dial down the "customer service mode" :) Re: GitHub: Yeah, thankfully I had the local git history, so the code was safe. Just lost the community interactions (stars/issues), which was a bummer. Re: Felix: That sounds exactly like what I need. Being able to define custom schedulers within the language is pretty much the holy grail I'm chasing here. I'll put it on my reading list for tonight.

Haha, you have a really sharp eye! 1. The Baby Wireshark: Unfortunately, my previous GitHub account got flagged/shadowbanned (still not sure why, and the appeal didn't work), so I lost access to that repo. I had to start fresh with this new account. 2. The Tone: You caught me! English is not my first language. I do use LLMs to help polish my grammar because I want to ensure my technical points are clear and I don't accidentally sound rude due to language barriers. Also, I learned most of my English from reading technical documentation and watching TED talks, so my "default" style tends to be a bit formal—just like an AI! :)

The legendary "Coroutines in C" article!

Thanks for the reference—I learned a lot from his work. His use of macros to hide the switch statement is basically the spiritual ancestor of co_await. It is wild to think that C++20 essentially standardized that exact pattern, just moving the "state machine generation" from the preprocessor hacks to the compiler itself.

You are absolutely right about the history (Conway coined the term in '63!). The assembly stack-switching you mentioned is the classic "Stackful" approach (like Fibers or Boost.Context). C++20 went the "Stackless" route (compiler-generated state machines) to avoid the per-stack memory overhead, though it certainly makes the implementation mechanics trickier. Lua is definitely a gold standard for asymmetric coroutines. As for Felix—I actually wasn't familiar with it until you mentioned it. Thanks for the pointer! I'll definitely dig into their docs to see how they handle scheduling compared to the C++20 approach.

Oh absolutely! Adam Dunkels' work is legendary. It's kind of poetic that Protothreads achieved stackless concurrency via C preprocessor macros and Duff's device tricks, and now years later, C++20 finally baked that exact same "state machine via switch-case" logic directly into the compiler. Same spirit, just less macro magic! :)

That is a fascinating comparison! History really does rhyme. What you described—suspending with a flag and resuming with new values—is surprisingly similar to how the C++20 compiler transforms coroutines into a state machine under the hood. In tiny_coro, the promise_type essentially manages that "inversion of control" you mentioned, but hides the manual state management behind the co_await syntax. It's really cool to see that these fundamental patterns for "stopping and resuming" computation have existed for so long, just in different forms.

You hit the nail on the head. C++20 coroutines are indeed complex and the barrier to entry is high. However, that complexity actually forced me to start from first principles. It drove me to tackle the essential problems from the ground up, which gave me a much deeper understanding of how coroutines truly work. That is exactly why I built this project—I wanted to create a minimal "laboratory" to dissect stackless coroutines without the overhead of a massive framework like Seastar. Regarding your point on Erlang/Go: That's actually the goal of this scheduler! It implements the M:N threading model (Work-Stealing) to simulate that kind of "lightweight process" concurrency, but giving you manual control over the mechanics. Hope this helps you finally wrap your head around co_await!