Is there any official API reference for Julia Embedding in C, or should we be understanding by going through the code or asking here? And specifically, How to create and access the data in the tuple? How to convert a pointer to an array(not 1D) without copying i.e. how to use ‘jl_ptr_to_array’ Wh…

jl_value_t *types[] = {(jl_value_t*)jl_long_type, (jl_value_t*)jl_long_type}; jl_tupletype_t *tt = jl_apply_tuple_type_v(types, 2); typedef struct { ssize_t a; ssize_t b; } ntuple2int; ntuple2int *tuple = (ntuple2int*)jl_new_struct_uninit(tt); JL_GC_PUSH1(&tuple); tuple->a = 3; tuple->b = 2;…

[image] tastelessjolt: How to create and access the data in the tuple? Same as other struct. Declare the right C struct and cast the pointer, or compute the offset manually, or use the getfield function. [image] tastelessjolt: What should I pass the ‘dims’ argument? Should it be a tuple …

[image] yuyichao: Same as other struct Like? I need an example. Suppose you need to create (3, 2) Integer Tuple for the ‘dims’ argument of ‘jl_ptr_to_array’. I’m very new here. Thank you.

Btw, what about the other question that, Documentation about Embedding Julia more than what’s there at Embedding Julia ? Thank you.

In general, the recommended approach is to use the ones described in the doc to evaluate julia code and define your own API. There are other direct runtime interfaces available although those breaks much more often and are not really well documented other than the header itself.

I’m now unable to create n length tuple. typedef struct { ssize_t a[2]; } ntuple2int; where 2 can be any number. I tried this but this didn’t work. How to create a ‘n’ length tuple then? Thank you

So assume you don’t have any problem creating the type (unless you have a too big type you can just create a big enough buffer to pass in the tuple element types). With that you shouldn’t have any problem allocating the object either so I assume you only have problem with accessing elements. C does…

It’s April 2024, and this information is still not on the Embedding Julia page :slight_smile: It is pretty exciting wasting working hours to learn how to use the Julia C API by looking at the source code.

My advice is to keep the C API exposure to the minimum you need to set up @cfunction pointers and use those to interface between C and Julia. As a bonus this allows you to do things like dynamically loading libjulia .

API reference for Julia Embedding in C

General Usage

tastelessjolt June 20, 2017, 12:10am 10

Thanks for the answer. I was able to create an NTuple and populate it.

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API reference for Julia Embedding in C

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