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https://github.com/agessaman/MeshCore.git
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agessaman
6124f3c139
Host-testable building blocks for the single-owner runtime model: a value mailbox, a coalescing configuration mailbox, an async job handle, an SDK event channel with its slot transition, a completion-driven NTP schedule, a durable-preference commit and slot stats JSON emission.
40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
#pragma once
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#include <stdint.h>
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#include <string.h>
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#include "ObserverMailbox.h"
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// One loop-task publisher, one worker consumer. Reconfigure requests coalesce
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// with the complete configuration that caused them, never in separate flags.
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template<class Prefs, class Metadata>
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class ObserverConfigMailbox {
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public:
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void publish(const Prefs& prefs, const Metadata& metadata, uint32_t reconfigure = 0) {
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ObserverGuard guard(_lock);
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if (_revision && !reconfigure && memcmp(&_prefs, &prefs, sizeof(prefs)) == 0 &&
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memcmp(&_metadata, &metadata, sizeof(metadata)) == 0) return;
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_prefs = prefs;
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_metadata = metadata;
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_reconfigure |= reconfigure;
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if (++_revision == 0) ++_revision;
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}
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bool consume(Prefs& prefs, Metadata& metadata, uint32_t& revision, uint32_t& reconfigure) {
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ObserverGuard guard(_lock);
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if (!_revision || revision == _revision) return false;
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prefs = _prefs;
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metadata = _metadata;
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revision = _revision;
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reconfigure = _reconfigure;
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_reconfigure = 0;
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return true;
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}
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uint32_t revision() const {
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ObserverGuard guard(_lock);
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return _revision;
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}
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private:
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mutable ObserverLock _lock;
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Prefs _prefs{};
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Metadata _metadata{};
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uint32_t _revision = 0, _reconfigure = 0;
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};
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