From: samuel@...
Date: 2021-02-12T02:05:04+00:00
Subject: [ruby-core:102466] [Ruby master Feature#17470] Introduce	non-blocking `Timeout.timeout`

Issue #17470 has been updated by ioquatix (Samuel Williams).


@jsc I tried your example but it seems to work fine?

```
  def test_timeout_on_main_fiber
    message = nil

    thread = Thread.new do
      scheduler = Scheduler.new
      Fiber.set_scheduler scheduler

      Timeout.timeout(1) do
        message = MESSAGE
      end
    end

    thread.join

    assert_equal MESSAGE, message
  end
```

----------------------------------------
Feature #17470: Introduce non-blocking `Timeout.timeout`
https://bugs.ruby-lang.org/issues/17470#change-90354

* Author: ioquatix (Samuel Williams)
* Status: Open
* Priority: Normal
----------------------------------------
In this bug report, user complained that `Timeout.timeout` does not work correctly with scheduler: https://github.com/socketry/async-io/issues/43

We should introduce non-blocking timeout.

I propose the following:

```
rb_fiber_scheduler_with_timeout(VALUE scheduler, VALUE timeout, VALUE block)
```

We can directly modify `Timeout.timeout` to invoke this hook.



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