Function core_foundation::runloop::CFRunLoopObserverCreate

pub unsafe extern "C" fn CFRunLoopObserverCreate(
    allocator: *const c_void, 
    activities: usize, 
    repeats: u8, 
    order: isize, 
    callout: extern "C" fn(*mut __CFRunLoopObserver, usize, *mut c_void), 
    context: *mut CFRunLoopObserverContext
) -> *mut __CFRunLoopObserver