pub type IOHIDValueCallback = Option<unsafe extern "C-unwind" fn(*mut c_void, IOReturn, *mut c_void, NonNull<IOHIDValue>)>;Available on crate feature
hid only.Expand description
Type and arguments of callout C function that is used when an element value completion routine is called.
Parameter context: void * pointer to more data.
Parameter result: Completion result of desired operation.
Parameter sender: Interface instance sending the completion routine.
Parameter value: IOHIDValueRef containing the returned element value.
See also Apple’s documentation
Aliased Type§
pub enum IOHIDValueCallback {
None,
Some(unsafe extern "C-unwind" fn(*mut c_void, i32, *mut c_void, NonNull<IOHIDValue>)),
}