Function libffi_sys::ffi_prep_go_closure

pub unsafe extern "C" fn ffi_prep_go_closure(
    arg1: *mut ffi_go_closure, 
    arg2: *mut ffi_cif, 
    fun: Option<unsafe extern "C" fn(arg1: *mut ffi_cif, arg2: *mut c_void, arg3: *mut *mut c_void, arg4: *mut c_void)>
) -> ffi_status