Type Alias data_callback 

pub type data_callback = Option<unsafe extern "C" fn(data: *mut c_void, file: *const c_char, offset: c_int)>;

Aliased Type

pub enum data_callback {
    None,
    Some(unsafe extern "C" fn(*mut c_void, *const i8, i32)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut c_void, *const i8, i32))

Some value of type T.