Re: signal handling bogosities

[gerd.moellmann@t-online.de (Gerd Moellmann)]

Miles Bader <miles@lsi.nec.co.jp> writes:

> Perhaps I'm confused, but why can't the existing code that runs from the
> signal handler just be called from the event loop instead, at least as
> an easy first-step?
> 
> For instance, if the signal handler currently looks like:
> 
>    void signal_handler (...)
>    {
>      if (some_test)
>        do_mouse_stuff (mouse_info);
>      else if (some_other_test)
>        do_exposure_stuff (other info);
>    }
> 
> change it to be like:
> 
>    void signal_handler (...)
>    {
>      if (some_test)
>        queue_mouse_event (mouse_info);
>      else if (some_other_test)
>        queue_exposure_event (exposure_info);
>    }
> 
>    void event_loop_function (...)
>    {
>       while (event in event loop)
>         {
>           ...
>           if (event->type == mouse_event)
>             do_mouse_stuff (event->mouse_info)
>           else if (event->type == exposure_event)
>             do_exposure_stuff (event->exposure_info)
>           ...
>         }
>    }
> 
> In other words, re-use as much of the existing code as possible, but
> change the place where it's called.

What I was thinking about as "event loop" is a toolkit's event loop,
like XtAppMainLoop etc. for Xt, for instance.

I must admit that I never thought about using a home-brewed event
loop, so I can't say much about what that entails, sorry.