From: Charles Oliver Nutter <charles.nutter@...>
Date: 2008-12-24T14:56:37+09:00
Subject: [ruby-core:20853] Re: [Bug #921] autoload is not thread-safe

Nobuyoshi Nakada wrote:
> Hi,
> 
> At Tue, 23 Dec 2008 02:10:34 +0900,
> Charles Nutter wrote in [ruby-core:20797]:
>> The current logic for autoload is as follows:
> 
> This description is old.  Already autoload sees the same lock
> used by require, as Dave Thomas mentioned in [ruby-core:20801].
> 
> So I guess the autoload specific issue has gone, and we could
> focus on the issue of recursive/circular require, i.e.,
> [ruby-core:20794].

So if two threads lookup the same autoload constant at the same time, is 
the second thread guaranteed to wait until the first thread has finished 
requiring?

I was not aware this had been fixed or decided.