Re: [AD] object oriented AL_SYSTEM

[Peter Wang <tjaden@xxxxxxxxxx>]

On 2006-08-28, Elias Pschernig <elias@xxxxxxxxxx> wrote:
> 
> Yes, that's just what I meant :) So internal functions could just cast
> the object to what they expect (and also ASSERT on the right ->driver),
> something like:
> 
> _al_x11_line(AL_DISPLAY *display...)
> {
>    AL_ASSERT(display->driver == _al_display_x11_driver());
>    AL_DISPLAY_X11 *x11 = (AL_DISPLAY_X11 *)display;
> 
>    _al_lock_mutex(x11->xmutex);
>    XLine(x11->xdisplay, x11->xwindow, ...);
>    _al_unlock_mutex(x11->xmutex);
> }
> 
> All without the need of accessing a void * pointer (like is currently
> done e.g. with BITMAP and FONT, possible others), and _xwin (which
> already is a similar idea) would be a proper object instead of just
> grouped global variables.

I find the casting rather tedious, and you're losing out on some of C's
typechecking abilities (a problem that doesn't exist with the grouped
globals), but whatever.

Peter