On Saturday, 10 August 2024 at 07:46:46 UTC, Vitaliy Fadeev wrote:
## Trouble 1
Pass the structure through registers ?
[...]
How to implement on D?
You dont need to pass whole event. The obvious design for this
kind of things is that you declare a local event that's an union
of all possible things then in the low level event loop you
dispatch the members of interest to the high level consumer.
This is for example how this worked in kheops:
1. low level event loop with the big local union (an XEvent):
https://gitlab.com/basile.b/kheops/-/blob/master/src/kheops/control.d?ref_type=heads#L2770
2. example of dispatching where only the usefull things are
passed:
https://gitlab.com/basile.b/kheops/-/blob/master/src/kheops/control.d?ref_type=heads#L2863
3. then the high level consumers just receive the useful
parameters:
https://gitlab.com/basile.b/kheops/-/blob/master/src/kheops/control.d?ref_type=heads#L752
That's always 3 or 4 parameters, always passed in general purpose
registers.
I've never seen these kind of things done differently because it
would indeed be slow to pass the whole event.
