From: "ioquatix (Samuel Williams) via ruby-core" <ruby-core@ml.ruby-lang.org>
To: ruby-core@ml.ruby-lang.org
Cc: "ioquatix (Samuel Williams)" <noreply@ruby-lang.org>
Subject: [ruby-core:115952] [Ruby master Bug#20102] Introduce `Fiber#resuming?`
Date: Thu, 28 Dec 2023 07:26:00 +0000 (UTC) [thread overview]
Message-ID: <redmine.issue-20102.20231228072559.3344@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-20102.20231228072559.3344@ruby-lang.org
Issue #20102 has been reported by ioquatix (Samuel Williams).
----------------------------------------
Bug #20102: Introduce `Fiber#resuming?`
https://bugs.ruby-lang.org/issues/20102
* Author: ioquatix (Samuel Williams)
* Status: Open
* Priority: Normal
* Assignee: ioquatix (Samuel Williams)
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
There are some tricky edge cases when using `Fibre#raise` and `Fiber#kill`, e.g.
```ruby
fiber = nil
killer = Fiber.new do
fiber.raise("Stop")
end
fiber = Fiber.new do
killer.resume
end
fiber.resume
# 4:in `raise': attempt to raise a resuming fiber (FiberError)
# 4:in `block in <main>'
```
Async has to deal with this edge case explicitly by rescuing the exception:
https://github.com/socketry/async/blob/ffd019d9c1d547926a28fe8f36bf7bfe91d8a168/lib/async/task.rb#L226-L233
I'd like to avoid doing that and instead just ask "Can I kill/raise on this fiber right now?" which is determined by whether the fiber itself can be resumed or transferred to.
To address this, I'd like to introduce `Fiber#resuming?`:
```c
/*
* call-seq: fiber.resumed? -> true or false
*
* Whether the fiber is currently resumed.
*/
VALUE
rb_fiber_resuming_p(VALUE fiber_value)
{
struct rb_fiber_struct *fiber = fiber_ptr(fiber_value);
if (FIBER_TERMINATED_P(fiber)) return RUBY_Qfalse;
return RBOOL(fiber->resuming_fiber);
}
```
See the PR: https://github.com/ruby/ruby/pull/9382
--
https://bugs.ruby-lang.org/
______________________________________________
ruby-core mailing list -- ruby-core@ml.ruby-lang.org
To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org
ruby-core info -- https://ml.ruby-lang.org/mailman3/postorius/lists/ruby-core.ml.ruby-lang.org/
next parent reply other threads:[~2023-12-28 7:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-28 7:26 ioquatix (Samuel Williams) via ruby-core [this message]
2024-01-03 9:18 ` [ruby-core:115990] [Ruby master Feature#20102] Introduce `Fiber#resuming?` Eregon (Benoit Daloze) via ruby-core
2024-01-03 23:40 ` [ruby-core:116001] " ioquatix (Samuel Williams) via ruby-core
2024-01-04 9:46 ` [ruby-core:116007] " Eregon (Benoit Daloze) via ruby-core
2024-01-17 15:36 ` [ruby-core:116275] " matz (Yukihiro Matsumoto) via ruby-core
2024-04-07 14:10 ` [ruby-core:117457] " ioquatix (Samuel Williams) via ruby-core
2024-04-07 14:24 ` [ruby-core:117460] " ioquatix (Samuel Williams) via ruby-core
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-list from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.ruby-lang.org/en/community/mailing-lists/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=redmine.issue-20102.20231228072559.3344@ruby-lang.org \
--to=ruby-core@ruby-lang.org \
--cc=noreply@ruby-lang.org \
--cc=ruby-core@ml.ruby-lang.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).