Re: calling functions from loadable modules

[David Odin <David Odin bigfoot com>]

On Mon, Oct 18, 1999 at 02:59:21PM +0200, Willem Robert van Hage wrote:
> Dear members of this excellent list :)
> 
> Does anybody know how to call functions
> from modules loaded with g_module_open etc
> when you only know the name of the function as a string?
> 
> I want to use this in my game, because my data files
> that describe my monsters are in plain ASCII
> and I want to separate the functions that describe the
> monsters' behaviour from the game engine, so that you
> can make monsters without editing and recompiling the game itsself.
> but that means I got to be able to derive the function pointer
> from a string...
>
  the following function may be what you're looking for :
  
  gboolean g_module_symbol(GModule *module,
                           const gchar *symbole_name,
                           gpointer *symbol);
  
  You can use it like this :

  [ ... ]
  GModule *module;
  void (*MyPrintFunc)(gchar *);

  module = g_module_open("mymodule.so", 0);
  g_module_symbol(module, "PrintIt", (gpointer *)(&MyPrintFunc));
  MyPrintFunc("Hello");
  [ ... ]

               Hope this helps.


                       DindinX

-- 
David.Odin@bigfoot.com

Any stone in your boot always migrates against the pressure gradient to
exactly the point of most pressure.
		-- Milt Barber