From: Eric Hodel <drbrain@...7.net>
Date: 2009-05-31T04:02:42+09:00
Subject: Re: Runnin code at a certain time?

On May 30, 2009, at 12:46, Caleb Clausen wrote:
> On 5/30/09, Eric Hodel <drbrain@segment7.net> wrote:
>>> Is there some particular danger that Thread#run will be called on my
>>> threads without my asking?
>>
>> If it's library code, yes.  If it's application code, probably not.
>
> Can you be more specific? I'm curious as to how exactly this could
> happen. I suspect you speak from experience, but I can't see how if an
> application fiddles with a libraries internals in this way, that's not
> considered a bug in the application.

Since threads are involved, it doesn't need to muck with any  
internals, it just has to wake up the thread your sleep was running in:

class YourLib
   def your_sleep
     sleep 1_000_000
   end
end

class MyApp
   # ...
   def do_stuff
     @threads << Thread.start do
       # ...
       YourLib.new.your_sleep
       # ...
     end
   end

   def wakeup
     @threads.each do |thread|
       thread.run
     end
   end
end