Type Alias read_i 

pub type read_i = Option<unsafe extern "C" fn(read: *mut usize, buf: *mut c_void, count: usize, file: *mut c_void) -> err_t>;

Aliased Type

pub enum read_i {
    None,
    Some(unsafe extern "C" fn(*mut usize, *mut c_void, usize, *mut c_void) -> u32),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut usize, *mut c_void, usize, *mut c_void) -> u32)

Some value of type T.