pulp::dataplane::PublishCounter Class Reference

Monotonic publish counter, shared by every value source. More...

#include <value_source.hpp>

Public Member Functions
void	note_publish () noexcept
	Writer (audio/host) thread, from publish().
std::uint32_t	publish_seq () const noexcept
	Reader (UI) thread. Changes iff the writer published since the last read.

Detailed Description

Monotonic publish counter, shared by every value source.

Staleness is "the writer stopped publishing", NOT "the value stopped changing" — and the two are genuinely different. A compressor holding a steady -6 dB of gain reduction publishes the same number every block and must keep reading -6; a processor whose audio stopped publishes nothing and must decay to its neutral. Comparing values cannot tell those apart, so a reader watches this counter instead.

Member Function Documentation

note_publish()

void pulp::dataplane::PublishCounter::note_publish ( )

inlinenoexcept

Writer (audio/host) thread, from publish().

Relaxed: the counter orders no other memory, it only has to be monotonic and eventually visible.

publish_seq()

std::uint32_t pulp::dataplane::PublishCounter::publish_seq ( ) const

inlinenoexcept

Reader (UI) thread. Changes iff the writer published since the last read.

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The documentation for this class was generated from the following file:

• /home/runner/work/pulp/pulp/core/dataplane/include/pulp/dataplane/value_source.hpp