Type Alias VAMessageCallback 

pub type VAMessageCallback = Option<unsafe extern "C" fn(user_context: *mut c_void, message: *const c_char)>;

Type of a message callback, used for both error and info log.

Aliased Type

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

Variants

None

No value.

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

Some value of type T.