[ruby-core:103954] [Ruby master Feature#17849] Fix Timeout.timeout so that it can be used in threaded Web servers

Issue #17849 has been updated by mame (Yusuke Endoh).


Just FYI. According to @ko1, masking all exceptions in an ensure clause is possible in pure Ruby, as long as you use MRI.

```
begin
  ...
ensure
  Thread.handle_interrupt(Object => :never) do
    ..
  end
end
```

No interrupt checking is executed outside of handle_interrupt block. This is an implementation detail of MRI, though.

Note: we don't insist that people should write such messy code for all ensure clauses. It may be just useful to perform a proof-of-concept of this proposal, whether it is practically possible to implement a global timeout.

----------------------------------------
Feature #17849: Fix Timeout.timeout so that it can be used in threaded Web servers
https://bugs.ruby-lang.org/issues/17849#change-92086

* Author: duerst (Martin Dst)
* Status: Open
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
----------------------------------------
Making this a separate issue from #17837

Eregon (Benoit Daloze) wrote in https://bugs.ruby-lang.org/issues/17837#note-10 (which is  about timeouts for regular expressions):

> I think fixing Timeout.timeout might be possible.
> The main/major issue is it can trigger within `ensure`, right? Is there anything else?
> We could automatically mask `Thread#raise` within `ensure` so it only happens after the `ensure` body completes.
> And we could still have a larger "hard timeout" if an `ensure` takes way too long (shouldn't happen, but one cannot be sure).
> I recall discussing this with @schneems some time ago on Twitter.





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

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