Type Alias EVT_SUBSCRIBE_CALLBACK 

pub type EVT_SUBSCRIBE_CALLBACK = Option<unsafe extern "system" fn(action: EVT_SUBSCRIBE_NOTIFY_ACTION, usercontext: *const c_void, event: EVT_HANDLE) -> u32>;

Aliased Type

pub enum EVT_SUBSCRIBE_CALLBACK {
    None,
    Some(unsafe extern "system" fn(EVT_SUBSCRIBE_NOTIFY_ACTION, *const c_void, EVT_HANDLE) -> u32),
}

Variants

None

No value.

Some(unsafe extern "system" fn(EVT_SUBSCRIBE_NOTIFY_ACTION, *const c_void, EVT_HANDLE) -> u32)

Some value of type T.