From: Charles Oliver Nutter <charles.nutter@...>
Date: 2009-01-21T03:39:09+09:00
Subject: [ruby-core:21474] Re: Supporting Thread.critical=with native threads

Paul Brannan wrote:
> On Tue, Jan 20, 2009 at 02:52:46AM +0900, Charles Oliver Nutter wrote:
>> I suppose we can volunteer JRuby as a guinea pig for this new definition 
>> of critical=, and see how it goes. JRuby 1.1.7 will implement critical= 
>> as a global mutex. We shall see how it goes :)
> 
> Will this be on or off by default?  It sounds dangerous, in that it
> could silently break code.  Seems like it would be better to disable
> critical= altogether and require users to adapt.

It would be on by default; as with many other features, I think 
implementing the 90% case and documenting how critical= is supposed to 
officially work in JRuby would be better for now than a hard break. And 
remember that even currently it's not 100% since it doesn't guarantee 
other threads won't run for at least a little while before stopping. So 
we're just making that behavior official and standard in JRuby, since 
it's the best we can do.

- Charlie