Feature #4849: io/wait should have a way to avoid FIONREAD

• Status: Closed
• Assignee: nobu (Nobuyoshi Nakada)
• Target version: 2.6

[normalperson (Eric Wong)]

I would like an API method for io/wait which bypasses FIONREAD. Some IO
objects I work with (e.g. Linux eventfd[1]) to not support FIONREAD.

I can implement any proposed API for io/wait, but I don't know what it should
be. Perhaps just "IO#wait_readable", since I also have
http://redmine.ruby-lang.org/issues/4646 open for IO#wait_writable.

Meanwhile, I will use IO.select. I believe IO#wait_* will be a better
API that is easier-to-use and potentially faster (it can bypass array
scanning and use poll() for high FDs in Linux).

[1] http://bogomips.org/sleepy_penguin/SleepyPenguin/EventFD.html

[mame (Yusuke Endoh)]

• Status changed from Open to Assigned
• Assignee set to nobu (Nobuyoshi Nakada)

[mame (Yusuke Endoh)]

• Target version changed from 2.0.0 to 2.6

[nobu (Nobuyoshi Nakada)]

• Status changed from Assigned to Closed
• % Done changed from 0 to 100

Applied in changeset r50262.

---

wait.c: poll over nread

• ext/io/wait/wait.c (io_ready_p, io_wait_readable): try polling
  first and check FIONREAD optionally to see if EOF.
  [ruby-core:36805] [Feature #4849]