From: funny.falcon@...
Date: 2014-10-09T10:16:59+00:00
Subject: [ruby-core:65558] [ruby-trunk - Feature #10344] [PATCH] Implement	Fiber#raise

Issue #10344 has been updated by Yura Sokolov.


Yes: it is missing piece to make "greenlet" port, in other words - green threads that mimics real threads.
To accomplish that there is a need to raise exception in a fiber waiting on event if event fails.
As Knut said it could be implemented in a Ruby, but it feels to be dirty way. If implemented in C it will lead to cleaner implementation.


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Feature #10344: [PATCH] Implement Fiber#raise
https://bugs.ruby-lang.org/issues/10344#change-49318

* 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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