Method destroyTransformEngines

app/src/DataModel/FrameBuilder.cpp:2195–2226

* @brief Destroys all per-source transform engines and releases resources. */

 * @brief Destroys all per-source transform engines and releases resources.
 */
void DataModel::FrameBuilder::destroyTransformEngines()
{
  m_engineCacheSourceId = -1;
  m_luaEngineForSource  = nullptr;
  m_jsEngineForSource   = nullptr;
  m_captureFlagsDirty   = true;

  m_tableStore.clearLookupCache();

  for (auto& [id, engine] : m_transformEngines) {
    engine.jsRefs.clear();

    if (engine.luaState)
      for (const auto& [uid, ref] : engine.luaRefs)
        luaL_unref(engine.luaState, LUA_REGISTRYINDEX, ref.ref);

    engine.luaRefs.clear();

    if (engine.luaState) {
      lua_close(engine.luaState);
      engine.luaState = nullptr;
    }

    engine.jsWatchdog.reset();

    delete engine.jsEngine;
    engine.jsEngine = nullptr;
  }

  m_transformEngines.clear();
  Q_ASSERT(m_transformEngines.empty());
}

/**
 * @brief Applies the pre-compiled transform for a dataset; returns @p rawValue on error or missing