Fiber implementation questions

[deadalnix via Digitalmars-d]

On Monday, 20 June 2016 at 15:43:27 UTC, Ilya Yaroshenko wrote:
> Hello,
>
> I am thinking about faster event loop that vibe.d has (does not 
> matter what driver are used). I want to implement (at least 
> DIP) advanced Fiber yielding loop that can allow to eliminate 
> context switching for all kind of event waiters.
>
> Q1: Is it save to detach Fiber context from one thread and 
> attach it to another thread?
>

No, and there are no way to make it safe without significant 
penalty for ALL code (not just code using fibers) and breaking 
the type system.

> Q2: core.thread.Fiber implementation looks like GC does not 
> scan function stacks for yielded contexts. Why?
>

Doesn't it ?