From: Alex Fenton <aff28@...>
Date: 2008-04-01T20:50:08+09:00
Subject: Detaching free function from String in C API

Hi

In a C extension, you can unset the 'free' function that will be called 
when an object is garbage collected with something like:

RDATA(obj)->dfree = 0;

This is useful if you know that whatever C library you're interfacing to 
will take care of free-ing the C structure.

Is the same thing is possible with an in-built ruby String object, to 
set it so that the underlying char* contents will not be freed when the 
String is GC'd?

thanks
alex