You can absolutely build coroutines out of a generalized context switch. So yes, in some sense. But note that the linked article doesn't use setjmp/longjmp, w

You can absolutely build coroutines out of a generalized context switch. So yes, in some sense. But note that the linked article doesn't use setjmp/longjmp, which is what makes it so clever. FWIW: would I personally actually use this trick? Almost certainly not. C APIs aren't well suited to that level of abstraction IMHO, if you have an app that needs it leave the C stuff to the stuff C is good at and wrap a C++ or Rust or whatever layer on top for the subtleties.