From: Akira Tanaka <akr@...>
Date: 2011-06-02T20:20:52+09:00
Subject: [ruby-core:36695] [Ruby 1.9 - Bug #4683] [PATCH] io.c: copy_stream execute interrupts and retry


Issue #4683 has been updated by Akira Tanaka.

File copy_stream_interrupt_handling-2.patch added

Adding public functions needs a discussion with ko1.

copy_stream_interrupt_handling-2.patch uses internal.h to share
declarations between io.c and thread.c.
----------------------------------------
Bug #4683: [PATCH] io.c: copy_stream execute interrupts and retry
http://redmine.ruby-lang.org/issues/4683

Author: Eric Wong
Status: Assigned
Priority: Normal
Assignee: Akira Tanaka
Category: core
Target version: 1.9.3
ruby -v: ruby 1.9.3dev (2011-05-13 trunk 31504) [x86_64-linux]


It's debatable whether this is a bug or not, but I think the current interrupt
handling behavior with IO.copy_stream is fragile and unpredictable, and
inconsistent with IO#read and IO#write.

This is to be consistent with IO#read and IO#write behavior
where rb_io_wait_readable() and rb_io_wait_writable() retry
on interrupt (EAGAIN/ERESTART) instead of returning a short
copy or raising Errno::EINTR.



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