From: Eric Hodel <drbrain@...7.net>
Date: 2011-02-09T09:59:26+09:00
Subject: Re: C extension: How to check if a VALUE is still alive (not being GC'ed)?

On Feb 8, 2011, at 4:29 PM, Iņaki Baz Castillo wrote:
> 2011/2/9 Eric Hodel <drbrain@segment7.net>:
>>> Then... why do I need a mark callback? Maybe I miss something, however
>>> Itested my code under high load and doesn't seem to leak.
>>> Thanks a lot.
>> 
>> Since you use the instance variable you do not need the mark callback.  The mark callback is only required if you are storing ruby objects in a structure that hides them from ruby.
> 
> Ok. So if for example my class stores some VALUE objects in a pure C
> array, and these objects are not referenced at Ruby level, then I must
> mark them. If not, Ruby GC could remove them from memory at any time,
> am I right?
> 
> Thanks a lot.

Correct.