pulp::view::MeterSource Class Reference

Lock-free meter channel: the host publishes a MeterFrame from the audio/host thread; the view reads the latest frame paint-safe. More...

#include <value_source.hpp>

Public Member Functions
	~MeterSource ()
void	publish (const MeterFrame &frame)
	Publish the latest reading.
MeterFrame	read ()
	Read the latest published reading.
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.

Friends
class	ValueChannelSet

Detailed Description

Lock-free meter channel: the host publishes a MeterFrame from the audio/host thread; the view reads the latest frame paint-safe.

Exactly one writer and one reader thread (the TripleBuffer contract).

Constructor & Destructor Documentation

~MeterSource()

pulp::dataplane::MeterSource::~MeterSource

(

)

Member Function Documentation

note_publish()

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

inlinenoexceptinherited

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

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

publish()

void pulp::dataplane::MeterSource::publish

(

const MeterFrame &

frame

)

Publish the latest reading.

Call from the writer (audio/host) thread. Alloc-free and non-blocking — a fixed-size copy into the back buffer.

publish_seq()

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

inlinenoexceptinherited

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

read()

MeterFrame pulp::dataplane::MeterSource::read

(

)

Read the latest published reading.

Call from the reader (UI) thread. Returns by value so the caller never holds a reference into the buffer.

Friends And Related Symbol Documentation

ValueChannelSet

friend class ValueChannelSet

friend

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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