Function paho_mqtt_sys::MQTTAsync_strerror

pub unsafe extern "C" fn MQTTAsync_strerror(code: c_int) -> *const c_char

Returns a pointer to a string representation of the error code, or NULL. Do not free after use. Returns NULL if the error code is unknown. @param code the MQTTASYNC_ return code. @return a static string representation of the error code.