From: ts <decoux@...>
Date: 2002-04-04T20:29:45+09:00
Subject: Re: Help: Ruby<->C++ callbacks

>>>>> "L" == Luigi Ballabio <ballabio@mac.com> writes:

L>          /* how to make sure the Ruby proc stays alive
L>             as long as we need it?
L>             Is the following the right way? */
L>          rb_global_variable(p_);

 no,

L>      }
L>          /* how to make sure the Ruby proc stays alive
L>             as long as we need it? */
L>          o.refCount_++;

 no,

L>      }

 When you return an object from your C++ code you must use
 Data_Wrap_Struct() or Data_Make_Struct()

 The 2nd argument of Data_Wrap_Struct (3rd for Data_Make_Struct) is the
 mark function which will be called when the GC mark the current object.

 Define such a function when you return a new object and in this function
 make a call to rb_gc_mark() to mark the Proc object



Guy Decoux