Type Alias CFRunLoopObserverCallBack 

pub type CFRunLoopObserverCallBack = Option<unsafe extern "C" fn(observer: CFRunLoopObserverRef, activity: CFRunLoopActivity, info: *mut c_void)>;

Apple SDK type alias CFRunLoopObserverCallBack.

Aliased Type

pub enum CFRunLoopObserverCallBack {
    None,
    Some(unsafe extern "C" fn(*mut __CFRunLoopObserver, u64, *mut c_void)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut __CFRunLoopObserver, u64, *mut c_void))

Some value of type T.