[PATCH wayland] server: add helper functions for wl_global

[Daniel Stone]

Hi,

On 23 February 2015 at 16:36, Jonny Lamb <jonny.lamb at collabora.co.uk> wrote:
> Il 23/02/2015 17:28, Derek Foreman ha scritto:
>> On 23/02/15 10:02 AM, Jonny Lamb wrote:
>>> The intention here is to be able to find an existing wl_global using
>>> some search parameters and then get some information about it.
>>
>> I'm not sure I see a need for this, but if there is need there should
>> also be documentation. :)
>
> The use-case I have now is in ensuring only one wl_drm is created per
> wl_display.

Specifically, in the case where you have one wl_display bound to
multiple EGLDisplays, which may both try to add a wl_drm instance for
the same device. The freakish contrived usecase this was written to
support is where a compositor connects to an upstream Wayland
compositor for final display, but also connects to itself (long
story). You can definitely construct more sensible usecases though ...

Cheers,
Daniel