Function csound_sys::csoundRegisterKeyboardCallback

pub unsafe extern "C" fn csoundRegisterKeyboardCallback(
    arg1: *mut CSOUND, 
    func: Option<unsafe extern "C" fn(userData: *mut c_void, p: *mut c_void, type_: c_uint) -> c_int>, 
    userData: *mut c_void, 
    type_: c_uint
) -> c_int