Type Alias JackPropertyChangeCallback 

pub type JackPropertyChangeCallback = Option<unsafe extern "C" fn(subject: jack_uuid_t, key: *const c_char, change: jack_property_change_t, arg: *mut c_void)>;

Aliased Type

pub enum JackPropertyChangeCallback {
    None,
    Some(unsafe extern "C" fn(u64, *const i8, u32, *mut c_void)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(u64, *const i8, u32, *mut c_void))

Some value of type T.