Ben Plotke (Feb 19 2024 at 23:13): Ben Plotke (Feb 19 2024 at 23:13):I am trying to make myself a custom C platform, but have been struggling to figure out the most basic steps.
How do I expose a function in my C platform to my Roc code?
The closest thing I have found only has accessing a Roc function in C, but not the other way around: https://github.com/roc-lang/roc/blob/main/examples/platform-switching/c-platform/host.c
Thank you in advance for any answers or for pointing me in the direction of the pertinent documentation.
Luke Boswell (Feb 20 2024 at 01:12):I wrote an article which kind of touches on this. I'm only learning myself, but maybe this helps a little?
https://lukewilliamboswell.github.io/roc-ray-experiment/#step5
Luke Boswell (Feb 20 2024 at 01:14):Basically, roc platform calls into the host using effects. The platform defines effects which are exposed to the app author via tasks.
Last updated: Jul 26 2025 at 12:14 UTC