Re: GClosure questions

[Robert Nikander <nikander mindspring com>]

Ok, I think I can answer #1 one for myself...

It is really a 'subclass' of GClosure to be used in C.
For cb you pass in your C function to call, and then you set the 
marshal function to be one of the marhallers from gtkmarhal.h.

If you were writing a python callback, you would write your own struct 
like
struct MyPyClosure {
  GClosure gclosure;	 
  PyObject * callable;
  ...
}

And then write your own marshal function to take the GValues and turn 
them
into Python objects for arguments to the Python callable object.



On 2001.12.17 10:44 Robert Nikander wrote:
> Hi,
> I am trying to understand GClosures. I think I am getting most of it, 
> but can someone tell me or point me to some docs about...
>
> 1. What is the purpose of the _C_ Closure stuct and gcclosure_new, 
> etc?  For example, when does the 'cb' in
>
>    closure = g_cclosure_new( cb, data, notify )
>
> get called?
>
> 2. What is the 'meta marshal' function.  I set it and it got called 
> just like a 'marshal' function.