setter_impl.h File Reference

Transport-neutral base class for every field-model setter (latest-value writer). More...

#include "./node_impl.h"

Include dependency graph for setter_impl.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
class	vlink::SetterImpl
	Field-model writer base shared by every transport-specific setter. More...

Namespaces
	vlink

Detailed Description

Transport-neutral base class for every field-model setter (latest-value writer).

This is an internal implementation header used by the public Setter template; applications should depend on setter.h. SetterImpl extends NodeImpl with the field-model write semantics: writing overwrites the topic's single tracked value and the backend may notify the setter via a sync callback when a late getter needs the cached value resent.

ImplType

The constructor stamps impl_type with kSetter so the discovery and recording layers correctly identify outgoing field updates.

Lifecycle

• Constructed by the matching Conf::create_setter().
• init() / deinit() inherited from NodeImpl bring the transport up.
• sync() is invoked by the public Setter once the user wires a late-getter sync callback.
• write() pushes the serialised value to all matched getters.

Role table

Capability	Provider
Wire write	Subclass override of write()
Late-getter resend	Subclass override of sync()

Internal API contract

Method	Default	Subclass duty
write(const Bytes&)	Pure virtual	Push frame to transport
sync(SyncCallback&&)	Pure virtual	Bind late-join callback