Finish examples and documentation for returning a vector

[shepmaster]

No description provided.

[gjtorikian]

Found myself needing this. 😅

What sort of help are you looking for exactly? Some research, or the entire module written? I'm looking to try this out for my FFI project and curious to know if I can help.

[shepmaster]

Sorry for the late response, @gjtorikian! You can see the initial work in #48 and #43. The main missing pieces are getting the example to build in the remaining languages and the prose discussion about the nuances needed. I'd be happy to help you with any details!

[gjtorikian]

Ok, no worries!

I know Ruby, and have built FFI/C bindings for it before, so I'll take a crack at that.

[Stargateur]

pub extern fn counter_generate(size: size_t, vec: *mut *mut int16_t) -> size_t

Is quite odd, why return the size giving by the caller, I think it's more logical to do:

pub extern fn counter_generate(size: size_t) -> *mut int16_t

That also allow to return NULL to indicate an error.

[arturtr]

It will be good to add an example for ruby

[gjtorikian]

The bad news is I never got around to adding this content.

The good news is I have an open source library and blog post which passes around vectors; the FFI binding is to Ruby.