Function bssl_sys::BN_GENCB_set

pub unsafe extern "C" fn BN_GENCB_set(
    callback: *mut BN_GENCB,
    f: Option<unsafe extern "C" fn(event: c_int, n: c_int, arg1: *mut BN_GENCB) -> c_int>,
    arg: *mut c_void
)