Re: [OBORONA-SPAM] Re: Gtk::Module

[Bob Caryl <bob fis-cal com>]

Alexander Volosatov wrote:

> > > Try this:
> > >      
>
>  
>
> > > Glib::Module module("libfsdyn.dll");
> > >      
>  
>  
>
> > > if (module)
> > > {
> > >   void (*function)(void);
> > >   cout << "Module found\n";
> > >   module.get_symbol("func1", function);
> > >   (*function)();
> > > }
> > >      
>
>
>  
>
> > > Bob
> > >      
>
>  
>
> > It doesn't work.
> >    
>
> Code of lib:
>
> #include <iostream>
>
> void func1()
> {
>     std::cout << "dll func\n";
> }
>
>
> and main program:
>
> #include <iostream>
> #include <glibmm.h>
>
> using namespace std;
>
> int main (int argc, char *argv[])
> {
>  cout << "Hello World!" << endl;
>  
>        Glib::Module module("libfsdyn.dll");
>  
>        if (module)
>        {
>                cout << "Module found\n";
>                void (*function)(void);
>                std::string str("func1");
>                if (module.get_symbol(str, (void *&)function))
>                {
>                        cout << "function loaded\n";
>                        function();
>                }
>                else
>                {
>                        cout << "fuction not loaded\n";
>                }
>        }
>  
>  cout << "Press ENTER to continue..." << endl; 
>  cin.get();
>  return 0;
> }
>
>
> log:
> Hello World!
> Module found
> fuction not loaded
> Press ENTER to continue...
>
> WHY FUNCTION IS NOT FOUND????
>
>  
I do not use Glib::Module.  I do it this way:


#include <dlfcn.h>

// function to execute the library function designated in the XML
// file.
void MainMenu::on_menu_others(Glib::ustring execname)
{
   void (*menuitem)(void);
   char *error;
   char *libname = g_strdup_printf("/usr/flib/%s.so",execname.c_str());
  
   Glib::ustring quit = "quit";
  
   // if the user selected quit just leave town
   if(quit == execname)
   {
       g_free(libname);
       hide();
       return;
   }
 
   if(!execname.length())
   {
       g_free(libname);
       return;
   }
  
   void *handle = dlopen (libname, RTLD_NOW);
  
   if(!handle)
   {
       error = dlerror();
       printf("Could not open %s, error: %s\n",libname,error);
       g_free(libname);
       return;
   }
  
   g_free(libname);
  
   menuitem = (void (*)(void))dlsym(handle, (char *)execname.c_str());
  
   if ((error = dlerror()) != NULL)
   {
       printf("Error: %s\n",error);
       return;
   }
  
   (*menuitem)();
  
  dlclose(handle);
  
}


You'll need to use the following when you compile and link:

`pkg-config --cflags --libs libgnome-2.0`

Hope this helps.

Bob

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