From: _why <why@...>
Date: 2008-11-27T15:58:02+09:00
Subject: [ruby-core:20138] Re: Ruby class variable access from C

On Thu, Nov 27, 2008 at 04:49:32AM +0900, Christopher Thompson wrote:
> I think I can get it by doing:
> VALUE myvar = rb_eval_string("Myclass::myvar");
> but surely there's a better way?  I'm thinking something like
> rb_cvar_get() but that requires that I pass in a VALUE and all I have is
> a string at this point, "Myclass".

If you create the class in your C extension, you'll get a VALUE
back.

  VALUE cMyclass;

  void
  Init_myext()
  {
    cMyclass = rb_define_class("Myclass", rb_cObject);
  }

  VALUE
  much_much_later(VALUE self)
  {
    VALUE myvar = rb_cvar_get(cMyclass, rb_intern("@@myvar"));
  }

_why