Function paho_mqtt_sys::MQTTAsync_disconnect

pub unsafe extern "C" fn MQTTAsync_disconnect(
    handle: MQTTAsync, 
    options: *const MQTTAsync_disconnectOptions
) -> c_int

This function attempts to disconnect the client from the MQTT server. In order to allow the client time to complete handling of messages that are in-flight when this function is called, a timeout period is specified. When the timeout period has expired, the client disconnects even if there are still outstanding message acknowledgements. The next time the client connects to the same server, any QoS 1 or 2 messages which have not completed will be retried depending on the cleansession settings for both the previous and the new connection (see MQTTAsync_connectOptions.cleansession and MQTTAsync_connect()). @param handle A valid client handle from a successful call to MQTTAsync_create(). @param options The client delays disconnection for up to this time (in milliseconds) in order to allow in-flight message transfers to complete. @return ::MQTTASYNC_SUCCESS if the client successfully disconnects from the server. An error code is returned if the client was unable to disconnect from the server