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[traffic] Cache routing session state, introduce IsObserverInhibited()

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Signed-off-by: mvglasow <michael -at- vonglasow.com>
This commit is contained in:
mvglasow
2025-11-08 16:32:28 +02:00
parent f7882636cd
commit 1d87e0e987
2 changed files with 24 additions and 16 deletions
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35
libs/map/traffic_manager.hpp
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@@ -533,6 +533,20 @@ private:
std::for_each(activeMwms.begin(), activeMwms.end(), std::forward<F>(f));
}
/**
* @brief Whether updates to the observer are currently inhibited.
*
* Updates are inhibited while a route calculation is in progress. In this state, the observer
* receives traffic updates only if the queue has run empty, not if nore locations are waiting
* to be decoded.
*
* Inhibtiting the observer is necessary as traffic updates during route calculation will cause
* it to restart from scratch. Once the route has been calculated, updates will trigger a
* recalculation, which is much faster (seconds or less).
*/
bool IsObserverInhibited() const { return (m_routingSessionState == routing::SessionState::RouteBuilding)
|| (m_routingSessionState == routing::SessionState::RouteRebuilding); }
DataSource & m_dataSource;
CountryInfoGetterFn m_countryInfoGetterFn;
CountryParentNameGetterFn m_countryParentNameGetterFn;
@@ -546,6 +560,14 @@ private:
*/
routing::RoutingSession & m_routingSession;
/**
* @brief Cached state of the routing session.
*
* `m_routingSession` methods which query the state may only be called from the GUI thread,
* therefore we are caching this value when we get notified of a change.
*/
routing::SessionState m_routingSessionState = routing::SessionState::NoValidRoute;
df::DrapeEngineSafePtr m_drapeEngine;
std::atomic<int64_t> m_currentDataVersion;
@@ -651,19 +673,6 @@ private:
*/
std::chrono::time_point<std::chrono::steady_clock> m_lastObserverUpdate;
/**
* @brief Whether updates to the observer are currently inhibited.
*
* Updates are inhibited while a route calculation is in progress. In this state, the observer
* receives traffic updates only if the queue has run empty, not if nore locations are waiting
* to be decoded.
*
* Inhibtiting the observer is necessary as traffic updates during route calculation will cause
* it to restart from scratch. Once the route has been calculated, updates will trigger a
* recalculation, which is much faster (seconds or less).
*/
bool m_observerInhibited = false;
/**
* @brief When the cache file was last updated.
*/