How to call a julia method defined in an imported package from c

When working with Julia, it is common to import packages and use their methods in your code. However, calling a Julia method defined in an imported package from C can be a bit tricky. In this article, we will explore three different ways to solve this problem.

Option 1: Using the C API

The first option is to use the C API provided by Julia. This allows you to interact with Julia objects and call Julia methods from C code. Here is an example of how you can call a Julia method defined in an imported package from C:

#include <julia.h>

int main() {
    jl_init();

    // Import the package
    jl_eval_string("using MyPackage");

    // Call the method
    jl_eval_string("MyPackage.my_method()");

    jl_atexit_hook(0);
    return 0;
}

This option requires some knowledge of the Julia C API and may not be suitable for all developers. However, it provides a direct way to call Julia methods from C code.

Option 2: Using Julia’s CCall interface

Another option is to use Julia’s CCall interface, which allows you to call Julia functions from C code without using the C API directly. Here is an example of how you can call a Julia method defined in an imported package using CCall:

#include <julia.h>

int main() {

    jl_init();
    // Import the package

    jl_eval_string("using MyPackage");
    // Call the method

    jl_eval_string("ccall((:my_method, "MyPackage"")



            

    

            

            


        
            

            


        
            

            


        
            

            


        
            

            


        
    
    

            

            


        
            

            


        
            

            


        
            

            


        
            

            


        
    

                


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