pub type PhidgetFrequencyCounter_OnFrequencyChangeCallback = Option<unsafe extern "C" fn(ch: PhidgetFrequencyCounterHandle, ctx: *mut c_void, frequency: f64)>;Aliased Type§
pub enum PhidgetFrequencyCounter_OnFrequencyChangeCallback {
None,
Some(unsafe extern "C" fn(*mut _PhidgetFrequencyCounter, *mut c_void, f64)),
}