File indexing completed on 2025-01-19 03:53:29

 /* ============================================================
  *
  * This file is a part of digiKam project
  * https://www.digikam.org
  *
  * Date        : 2010-10-12
  * Description : Core database convenience object for grouping operations
  *
  * SPDX-FileCopyrightText: 2010 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * ============================================================ */
 
 #include "coredboperationgroup.h"
 
 // Qt includes
 
 #include <QElapsedTimer>
 
 // Local includes
 
 #include "digikam_debug.h"
 #include "coredb.h"
 #include "coredbaccess.h"
 #include "coredbbackend.h"
 
 namespace Digikam
 {
 
 class Q_DECL_HIDDEN CoreDbOperationGroup::Private
 {
 public:
 
     explicit Private()
     {
         access   = nullptr;
         acquired = false;
         maxTime  = 0;
     }
 
 public:
 
     CoreDbAccess* access;
     bool          acquired;
     QElapsedTimer timeAcquired;
     int           maxTime;
 
 public:
 
     bool needsTransaction() const
     {
         return CoreDbAccess::parameters().isSQLite();
     }
 
     void acquire()
     {
         if (access)
         {
             acquired = access->backend()->beginTransaction();
         }
         else
         {
             CoreDbAccess access;
             acquired = access.backend()->beginTransaction();
         }
 
         timeAcquired.start();
     }
 
     void release()
     {
         if (acquired)
         {
             if (access)
             {
                 access->backend()->commitTransaction();
             }
             else
             {
                 CoreDbAccess access;
                 access.backend()->commitTransaction();
             }
         }
     }
 };
 
 CoreDbOperationGroup::CoreDbOperationGroup()
     : d(new Private)
 {
     if (d->needsTransaction())
     {
         d->acquire();
     }
 }
 
 CoreDbOperationGroup::CoreDbOperationGroup(CoreDbAccess* const access)
     : d(new Private)
 {
     d->access = access;
 
     if (d->needsTransaction())
     {
         d->acquire();
     }
 }
 
 CoreDbOperationGroup::~CoreDbOperationGroup()
 {
     d->release();
     delete d;
 }
 
 void CoreDbOperationGroup::lift()
 {
     if (d->acquired)
     {
         d->release();
 
         if (d->access)
         {
             CoreDbAccessUnlock unlock(d->access);
         }
 
         d->acquire();
     }
 }
 
 void CoreDbOperationGroup::setMaximumTime(int msecs)
 {
     d->maxTime = msecs;
 }
 
 void CoreDbOperationGroup::resetTime()
 {
     d->timeAcquired.start();
 }
 
 void CoreDbOperationGroup::allowLift()
 {
     if (d->maxTime && d->timeAcquired.elapsed() > d->maxTime)
     {
         lift();
     }
 }
 
 } // namespace Digikam