Type Alias paho_mqtt_sys::MQTTAsync_messageArrived

pub type MQTTAsync_messageArrived = Option<unsafe extern "C" fn(context: *mut c_void, topicName: *mut c_char, topicLen: c_int, message: *mut MQTTAsync_message) -> c_int>;

Aliased Type

enum MQTTAsync_messageArrived {
    None,
    Some(unsafe extern "C" fn(_: *mut c_void, _: *mut i8, _: i32, _: *mut MQTTAsync_message) -> i32),
}

Variants

None

No value.

Some(unsafe extern "C" fn(_: *mut c_void, _: *mut i8, _: i32, _: *mut MQTTAsync_message) -> i32)

Some value of type T.