Type Alias IOHIDDeviceCallback 

pub type IOHIDDeviceCallback = Option<unsafe extern "C-unwind" fn(*mut c_void, IOReturn, *mut c_void, NonNull<IOHIDDevice>)>;

Available on crate feature hid only.

Type and arguments of callout C function that is used when a device routine is called.

Parameter context: void * pointer to more data.

Parameter result: Completion result of desired operation.

Parameter device: IOHIDDeviceRef containing the sending device.

See also Apple’s documentation

Aliased Type

pub enum IOHIDDeviceCallback {
    None,
    Some(unsafe extern "C-unwind" fn(*mut c_void, i32, *mut c_void, NonNull<IOHIDDevice>)),
}

Variants

None

No value.

Some(unsafe extern "C-unwind" fn(*mut c_void, i32, *mut c_void, NonNull<IOHIDDevice>))

Some value of type T.