Method loadChain

kdevplatform/language/duchain/duchain.cpp:648–690

Makes sure that the chain with the given index is loaded @warning m_chainsMutex must NOT be locked when this is called

    ///Makes sure that the chain with the given index is loaded
    ///@warning m_chainsMutex must NOT be locked when this is called
    void loadChain(uint index, QSet<uint>& loaded)
    {
        QMutexLocker l(&m_chainsMutex);

        if (!hasChainForIndex(index)) {
            if (!Algorithm::insert(m_loading, index).inserted) {
                //It's probably being loaded by another thread. So wait until the load is ready
                while (m_loading.contains(index)) {
                    l.unlock();
                    qCDebug(LANGUAGE) << "waiting for another thread to load index" << index;
                    QThread::usleep(50000);
                    l.relock();
                }
                loaded.insert(index);
                return;
            }
            loaded.insert(index);

            l.unlock();
            qCDebug(LANGUAGE) << "loading top-context" << index;
            TopDUContext* chain = TopDUContextDynamicData::load(index);
            if (chain) {
                chain->setParsingEnvironmentFile(loadInformation(chain->ownIndex()));

                if (!chain->usingImportsCache()) {
                    //Eventually also load all the imported chains, so the import-structure is built
                    const auto importedParentContexts = chain->DUContext::importedParentContexts();
                    for (const DUContext::Import& import : importedParentContexts) {
                        if (!loaded.contains(import.topContextIndex())) {
                            loadChain(import.topContextIndex(), loaded);
                        }
                    }
                }
                chain->rebuildDynamicImportStructure();

                chain->setInDuChain(true);
                instance->addDocumentChain(chain);
            }

            l.relock();
            m_loading.remove(index);
        }
    }

    ///Stores all environment-information
    ///Also makes sure that all information that stays is referenced, so it stays alive.