From: Scott Lembcke <lemb0029@...>
Date: 2006-07-25T07:20:12+09:00
Subject: Re: GC in C extension....

> Declaring the variable as rb_global_variable prevents Ruby from garbage
> collecting it. How do I release it back to Ruby again? Is there a
> rb_unset_global_variable?

You can use rb_gc_register_address() and rb_gc_unregister_address(). I'm 
pretty sure that rb_gc_register_address() and rb_global_variable() are 
actually the same function, but don't quote me on that.

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