From: Knut.Franke@...
Date: 2014-10-11T16:28:51+00:00
Subject: [ruby-core:65618] [ruby-trunk - Feature #10344] [PATCH] Implement	Fiber#raise

Issue #10344 has been updated by Knut Franke.


For some more sophisticated examples, see https://github.com/nome/coroutines. The library does work with vanilla Ruby, but the patch improves performance.

Also, similar code can be simplified by using Fiber#raise. Compare e.g. the two implementation of Consumer::Yielder#await at
https://github.com/nome/coroutines/blob/master/lib/coroutines/base.rb

----------------------------------------
Feature #10344: [PATCH] Implement Fiber#raise
https://bugs.ruby-lang.org/issues/10344#change-49355

* Author: Knut Franke
* Status: Open
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
----------------------------------------
While it is possible to implement this in pure Ruby (by wrapping Fiber.yield and Fiber#resume), this feels like a low-level feature that ought to be provided out of the box. Also, the C implementation is more straight-forward, and more efficient. Unfortunately, it is not quite possible to implement this as a C extension module (without resorting to wrappers again); cf. the change to make_passing_arg().

Example usage:

~~~
fib = Fiber.new do
  counter = 0
  loop { counter += Fiber.yield }
  counter
end
fib.resume
fib.resume 10
fib.resume 100
fib.raise StopIteration # => 110
~~~

---Files--------------------------------
0001-Implement-Fiber-raise.patch (4.12 KB)


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