[Cogl] [PATCH] poll: Add general way to hook into mainloop without fd

[Neil Roberts]

Neil Roberts <neil at linux.intel.com> writes:

> This doesn't look right, or at least it's quite different from how
> GMainLoop works. Whenever cogl_poll_renderer_dispatch is called it's
> going to dispatch all of the sources, regardless of whether the timeout
> is actually hit. I notice that the second loop also has the same problem
> because it doesn't check the revents field before dispatching.

Indeed, I've just run into a problem where Cogl hangs with the Wayland
backend in wl_display_dispatch. This function blocks if there are no
events to handle which means that if cogl_poll_renderer_dispatch is
called due to some other source then it will block the application.

Regards,
- Neil
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