Type Alias pref_cb 

pub type pref_cb = Option<unsafe extern "C" fn(pref: *mut pref_t, user_data: gpointer) -> guint>;

Aliased Type

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

Variants

None

No value.

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

Some value of type T.