Function IOObjectRetain 

pub extern "C-unwind" fn IOObjectRetain(
    object: io_object_t,
) -> kern_return_t

Available on crate feature libc only.

Retains an object handle previously returned by IOKitLib.

Gives the caller an additional reference to an existing object handle previously returned by IOKitLib.

Parameter object: The IOKit object to retain.

Returns: A kern_return_t error code.