From: Eric Wong <normalperson@...>
Date: 2013-02-25T05:20:20+09:00
Subject: [ruby-core:52848] Re: [ruby-trunk - Feature #7918][Open] Create Signal.in_trap?()

SASADA Koichi <ko1@atdot.net> wrote:
> (2013/02/23 11:31), kosaki (Motohiro KOSAKI) wrote:
> > Currently, ruby library have no way to detect a method is called from trap handler or not.
> > This is useful because Mutex#lock under trap raises an exception and some libraries may want to avoid it.
> 
> I'm not sure why it is useful. If a lock is needed, then the lock should
> be acquired in trap handler (and not supported yet). Detecting it is in
> trap, and do what?

How about allowing Mutex#lock to be recursive if (and only if) called
inside trap?