Issue #14736 has been updated by funny_falcon (Yura Sokolov).


I've shown `to_enum(:aga).to_a` to present the place where I wasn't right.

But if you look at your own second example, you will see that it doesn't do what it should do
(if `Fiber.yield` is replaced with yield point of your scheduler, for example, with `task.sleep(0.01)` or .socket.read`),
because yield point should not affect `e.next`.

And you've already shown this in third example.

Scheduler should use `Fiber.transfer`, because it is really scheduling primitive in its nature,
and because it is almost unknown and almost nowhere used.

----------------------------------------
Feature #14736: Thread selector for flexible cooperative fiber based concurrency
https://bugs.ruby-lang.org/issues/14736#change-72825

* Author: ioquatix (Samuel Williams)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
Ruby concurrency can be greatly enhanced by concurrent, deterministic IO.

Fibers have been shown many times to be a great abstraction for this purpose. The retain normal code flow and don't require any kind of Thread synchronisation. They are enjoyable to write code with because you don't have to concern yourself with thread synchronisation or other complicated issues.

The basic idea is that if some operation would block, it yields the Fiber, and other Fibers within the thread can continue to execute.

There are a number of ways to implement this. Here is a proof of concept to amend the existing `rb_io_wait_readable`/`rb_io_wait_writable`.

https://github.com/ruby/ruby/pull/1870

This design minimally affects the Ruby implementation and allows flexibility for selector implementation. With a small amount of work, we can support EventMachine (65 million downloads), NIO4r (21 million downloads). It would be trivial to back port.

This PR isn't complete but I am seeking feedback. If it's a good idea, I will do my best to see it through to completion, including support for EventMachine and NIO4r.

---Files--------------------------------
port_scanner_threadlet.rb (925 Bytes)


-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:ruby-core-request / ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>