pub type PhidgetDigitalInput_OnStateChangeCallback = Option<unsafe extern "C" fn(ch: PhidgetDigitalInputHandle, ctx: *mut c_void, state: c_int)>;Aliased Type§
pub enum PhidgetDigitalInput_OnStateChangeCallback {
None,
Some(unsafe extern "C" fn(*mut _PhidgetDigitalInput, *mut c_void, i32)),
}