From: Aaron Patterson <tenderlove@...>
Date: 2011-11-20T14:05:20+09:00
Subject: [ruby-core:41165] Re: [Ruby 1.9 - Bug #5138][Open] Add nonblocking IO that does not use exceptions for EOF and EWOULDBLOCK


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On Tue, Aug 02, 2011 at 07:35:15AM +0900, Yehuda Katz wrote:
>=20
> Issue #5138 has been reported by Yehuda Katz.
>=20
> ----------------------------------------
> Bug #5138: Add nonblocking IO that does not use exceptions for EOF and EW=
OULDBLOCK
> http://redmine.ruby-lang.org/issues/5138
>=20
> Author: Yehuda Katz
> Status: Open
> Priority: Normal
> Assignee: Yukihiro Matsumoto
> Category: core
> Target version: 1.9.4
> ruby -v: ruby 1.9.4dev (2011-07-31 trunk 32788) [x86_64-darwin11.0.0]
>=20
>=20
> The current Ruby I/O classes have non-blocking methods (read_nonblock and=
 write_nonblock). These methods will never block, and if they would block, =
they raise an exception instead (IO::WaitReadable or IO::WaitWritable). In =
addition, if the IO is at EOF, they raise an EOFError.
>=20
> These exceptions are raised repeatedly in virtually every use of the non-=
blocking methods. This patch adds a pair of methods (try_read_nonblock and =
try_write_nonblock) that have the same semantics as the existing methods, b=
ut they return Symbols instead of raising exceptions for these routine case=
s:
>=20
> * :read_would_block
> * :write_would_block
> * :eof
>=20
> The patch contains updates for IO, StringIO, and OpenSSL. The updates are=
 fully documented and tested.

Bump.  Can someone please give feedback?  What needs to change in this
patch before it can be applied?

Thanks!

--=20
Aaron Patterson
http://tenderlovemaking.com/

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