[Vala] binding help

["Matías De la Puente" <mfpuente ar gmail com>]

Hello, 

I need to make a binding for a library for the next hypotetical function:

int library_function (Data x);

Data is an structure, for example:

typedef struct Data 
{
    int value1;
    int value2;
};

In a vapi file i put this lines (the structure is also in the vapi):
namespace Library
{
    [CCode (cname = "library_function")
    public int function(Data x);
}

valac gives in the c source:

library_function(&x);

I want to know how to implement this because i need in the c source:

library_funcion(x);

i hope that someone can help me
Matias