pub unsafe extern "C" fn CFFileDescriptorCreateRunLoopSource(
allocator: *const c_void,
f: *mut __CFFileDescriptor,
order: isize,
) -> *mut __CFRunLoopSource
pub unsafe extern "C" fn CFFileDescriptorCreateRunLoopSource(
allocator: *const c_void,
f: *mut __CFFileDescriptor,
order: isize,
) -> *mut __CFRunLoopSource