From: Urabe Shyouhei <shyouhei@...>
Date: 2011-10-08T22:37:31+09:00
Subject: [ruby-core:40057] Re: 2.0 feature questionnaire

(10/08/2011 08:45 AM), SASADA Koichi wrote:
> We already have implemented similar idea.

"We" here includes me.

>  However, it is different.
> 
> (1) Init_foo() and InitVM_foo()
> 
> We require Init_foo() and InitVM_foo().  Init_foo() is called at first
> time.  InitVM_foo() is called every time VM requires it.

Technical background behind this: an extension might need a
global setup.  For instance pthread_key_create() and similar
thing should be called at most once.  So we provide a way for
extensions to do such things. OTOH on MVM situations,
rb_define_class() and other setups that were done in Init_foo
should now be per VM.  So we provide a place for them.  That
is InitVM_foo.