gistfile1.rs

#[no_mangle]
extern "C" fn foo(env: *mut ErlNifEnv, argc: i32, argv: *ERL_NIF_TERM) -> ERL_NIF_TERM {
    print!("Hello Foo from Rust\n");
    unsafe {
        let a = enif_make_atom(env, ("foo".to_c_str()).unwrap());
        return a;
    }
}

#[no_mangle]
pub fn _nif_init() -> *Struct_enif_entry_t {    
    static nif_funcs: &'static [ErlNifFunc] = &[ErlNifFunc {
        name: "foo",
        arity: 0,
        fptr: option::Some(foo)
   }];
    
    static entry: Struct_enif_entry_t = Struct_enif_entry_t {major: 2,
                                             minor: 6,
                                             name: "erl_nif",
                                             num_of_funcs: 1,
                                             funcs: nif_funcs,
                                             load: None,
                                             reload: None,
                                             upgrade: None,
                                             unload: None,
                                             vm_variant: "beam.vanilla" };
    
    return &entry as *Struct_enif_entry_t;    
}