From: "Iñaki Baz Castillo" <ibc@...>
Date: 2012-05-14T00:42:26+09:00
Subject: [C exten] Is it safe to use rb_hash_delete() without having the GVL?

Hi, my code is a C event loop that runs without the GVL (so other Ruby
1.9.3 threads can take the control) and when an event occurs it get
the GVL and executed a user provided Ruby block/proc.

Prior to calling rb_thread_call_with_gvl(), my code removes an element
from a Ruby hash by using rb_hash_delete(). This is, such an operation
is done from a thread which has not the GVL, so it could be dangerous.
However I get no errors at all. If I run more Ruby code without having
the GVL then of course I get critical errors, but that does not occur
if I just use rb_hash_delete().

So, is it safe to use rb_hash_delete() without having the GVL?

Thanks a lot.

-- 
Iñaki Baz Castillo
<ibc@aliax.net>