From: Patrick Gundlach <clr8.10.randomuser@...>
Date: 2006-02-08T20:43:21+09:00
Subject: c api, getting class

Hi,

q: How do I throw a custom exception in the c-part of a ruby program?


I have a mixed ruby/c class and I'd like to throw an exception that is
defined in the ruby side from the c side:


myklass.rb

class Myclass
  class UnknownFormat < Exception
  end
end


myklass_c.c

.... 
  VALUE eUnknownFormatError;
  eUnknownFormatError=rb_gv_get("Myclass::UnknownFormat");
  rb_raise(eUnknownFormatError,"fatal: format not found");


This does not work. I have no idea how to proceed. Some small hints
would probably enough to point me in the right direction. I have seen
(pickaxe) that I can define the class in the c part with
rb_define_class(), but I want to reuse the class that is already
defined on the ruby side.

Patrick