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 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 1999-2000 Waldo Bastian <bastian@kde.org>
     SPDX-FileCopyrightText: 2005-2009 David Faure <faure@kde.org>
     SPDX-FileCopyrightText: 2008 Hamish Rodda <rodda@kde.org>
     SPDX-FileCopyrightText: 2020 Harald Sitter <sitter@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #ifndef KSYCOCA_P_H
 #define KSYCOCA_P_H
 
 #include "ksycocafactory_p.h"
 #include <KDirWatch>
 #include <QDateTime>
 #include <QElapsedTimer>
 #include <QStringList>
 
 #include <memory>
 
 class QFile;
 class QDataStream;
 class KSycocaAbstractDevice;
 class KMimeTypeFactory;
 class KServiceTypeFactory;
 class KServiceFactory;
 class KServiceGroupFactory;
 
 // This is for the part of the global header that we don't need to store,
 // i.e. it's just a struct for returning temp data from readSycocaHeader().
 struct KSycocaHeader {
     KSycocaHeader()
         : timeStamp(0)
         , updateSignature(0)
     {
     }
     QString prefixes;
     QString language;
     qint64 timeStamp; // in ms
     quint32 updateSignature;
 };
 
 QDataStream &operator>>(QDataStream &in, KSycocaHeader &h);
 
 /**
  * \internal
  * Exported for unittests
  */
 class KSERVICE_EXPORT KSycocaPrivate
 {
 public:
     explicit KSycocaPrivate(KSycoca *qq);
 
     // per-thread "singleton"
     static KSycocaPrivate *self()
     {
         return KSycoca::self()->d;
     }
 
     bool checkVersion();
     bool openDatabase();
     enum BehaviorIfNotFound {
         IfNotFoundDoNothing = 0,
         IfNotFoundRecreate = 1,
     };
     Q_DECLARE_FLAGS(BehaviorsIfNotFound, BehaviorIfNotFound)
     bool checkDatabase(BehaviorsIfNotFound ifNotFound);
     void closeDatabase();
     void setStrategyFromString(const QString &strategy);
     bool tryMmap();
 
     /**
      * Check if the on-disk cache needs to be rebuilt, and do it then.
      */
     void checkDirectories();
 
     /**
      * Check if the on-disk cache needs to be rebuilt, and return true
      */
     bool needsRebuild();
 
     /**
      * Recreate the cache and reopen the database
      */
     bool buildSycoca();
 
     KSycocaHeader readSycocaHeader();
 
     KSycocaAbstractDevice *device();
     QDataStream *&stream();
 
     QString findDatabase();
     void slotDatabaseChanged();
 
     KMimeTypeFactory *mimeTypeFactory();
     KServiceTypeFactory *serviceTypeFactory();
     KServiceFactory *serviceFactory();
     KServiceGroupFactory *serviceGroupFactory();
 
     void addLocalResourceDir(const QString &path);
 
     enum {
         DatabaseNotOpen, // openDatabase must be called
         BadVersion, // it's opened, but it's not usable
         DatabaseOK,
     } databaseStatus;
     bool readError;
 
     qint64 timeStamp; // in ms since epoch
     enum { StrategyMmap, StrategyMemFile, StrategyFile } m_sycocaStrategy;
     QString m_databasePath;
     QStringList changeList;
     QString language;
     quint32 updateSig;
     QMap<QString, qint64> allResourceDirs; // path, modification time in "ms since epoch"
     QMap<QString, qint64> extraFiles; // path, modification time in "ms since epoch"
 
     void addFactory(KSycocaFactory *factory)
     {
         m_factories.append(factory);
     }
     KSycocaFactoryList *factories()
     {
         return &m_factories;
     }
 
     QElapsedTimer m_lastCheck;
     QDateTime m_dbLastModified;
 
     // Using KDirWatch because it will reliably tell us every time ksycoca is recreated.
     // QFileSystemWatcher's inotify implementation easily gets confused between "removed" and "changed",
     // and fails to re-add an inotify watch after the file was replaced at some point (KServiceTest::testThreads),
     // thinking it only got changed and not removed+recreated.
     // NOTE: this may be nullptr when file watching is disabled on the current thread
     std::unique_ptr<KDirWatch> m_fileWatcher;
     bool m_haveListeners;
 
     KSycoca *q;
 
 private:
     KSycocaFactoryList m_factories;
     size_t sycoca_size;
     const char *sycoca_mmap;
     QFile *m_mmapFile;
     KSycocaAbstractDevice *m_device;
 
 public:
     KMimeTypeFactory *m_mimeTypeFactory;
     KServiceTypeFactory *m_serviceTypeFactory;
     KServiceFactory *m_serviceFactory;
     KServiceGroupFactory *m_serviceGroupFactory;
 };
 
 #endif /* KSYCOCA_P_H */