getter_impl.h 文件参考

Abstract base class for all transport-specific getter (field reader) implementations. 更多...

#include "./node_impl.h"

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类
class	vlink::GetterImpl
	Transport-agnostic base for getter (field reader) node implementations. 更多...

命名空间
namespace	vlink

详细描述

Abstract base class for all transport-specific getter (field reader) implementations.

GetterImpl is the intermediate layer between the generic Getter<T> template and a concrete transport backend. It inherits from NodeImpl and adds field-getter semantics:

• Change notification via listen() – the callback is invoked whenever a new value is written by the corresponding Setter on the same topic.
• Optional latency and sample-loss tracking, identical in interface to SubscriberImpl.

Field Model Overview

Unlike the event model, the field model maintains a single "latest value" per topic. A Getter receives the most recent value; it does not buffer a queue of historic messages.

注解

Concrete subclasses must implement listen(MsgCallback&&).