Type Alias mode_query_func 

pub type mode_query_func = Option<unsafe extern "C" fn(mode: *const c_void, request: c_int, ptr: *mut c_void) -> c_int>;

Query function for a mode

Aliased Type

pub enum mode_query_func {
    None,
    Some(unsafe extern "C" fn(*const c_void, i32, *mut c_void) -> i32),
}

Variants

None

No value.

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

Some value of type T.