Function CFSocketRegisterValue 

pub unsafe extern "C-unwind" fn CFSocketRegisterValue(
    name_server_signature: *const CFSocketSignature,
    timeout: CFTimeInterval,
    name: Option<&CFString>,
    value: Option<&CFPropertyList>,
) -> CFSocketError

👎Deprecated: renamed to CFSocket::register_value

Available on crate features CFData and CFDate and CFSocket only.