[dfritz]

This is interesting, but I don't really understand the differences with the existing coroutine libraries like libtask, libconcurrency or libcoro.

Of course, it uses the longjmp/setjmp trick, as suggested by Dmitry Vyukov.

http://www.1024cores.net/home/lock-free-algorithms/tricks/fi...

However, I'm not sure of the benefit of this approach, compared to writing a few lines of stack switching assembly code per architecture. Especially, how portable are the implementations of longjmp and setjmp across the multitude of C libraries and operating systems?

But more importantly, it doesn't seem to solve the two main issues of coroutines libraries written in C that were already solved in Go:

- How does the stack can grow or shrink? (specifying the stack size in the worse case scenario doesn't scale well)

- How can a coroutine be moved to another operating system thread and back? (useful when blocking or when parallelism is needed)