Function libffi_sys::ffi_prep_cif_var

pub unsafe extern "C" fn ffi_prep_cif_var(
    cif: *mut ffi_cif, 
    abi: ffi_abi, 
    nfixedargs: c_uint, 
    ntotalargs: c_uint, 
    rtype: *mut ffi_type, 
    atypes: *mut *mut ffi_type
) -> ffi_status