Type Alias caEventCallBackFunc 

pub type caEventCallBackFunc = Option<unsafe extern "C" fn(arg1: event_handler_args)>;

Aliased Type

pub enum caEventCallBackFunc {
    None,
    Some(unsafe extern "C" fn(event_handler_args)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(event_handler_args))

Some value of type T.