File indexing completed on 2024-05-05 04:38:46

 /*
     SPDX-FileCopyrightText: 2009 David Nolden <david.nolden.kdevelop@art-master.de>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #ifndef KDEVPLATFORM_KSHAREDOBJECT_H
 #define KDEVPLATFORM_KSHAREDOBJECT_H
 
 #include <QSharedData>
 #include <QObject>
 
 namespace KDevelop {
 
 struct FakeAtomic
 {
     inline FakeAtomic(QObject& object, QSharedData& real) : m_object(object)
         , m_real(real)
     {
     }
     inline operator int() const
     {
         const int value = m_real.ref.loadAcquire();
         if (value == 0)
             return 1; //Always return true, because we handle the deleting by ourself using deleteLater
         return value;
     }
 
     inline bool ref()
     {
         return m_real.ref.ref();
     }
 
     inline bool deref()
     {
         bool ret = m_real.ref.deref();
         if (!ret)
             m_object.deleteLater();
 
         return true; //Always return true, because we handle the deleting by ourself
     }
 
     inline int loadRelaxed() const
     {
         return m_real.ref.loadRelaxed();
     }
 
     QObject& m_object;
     QSharedData& m_real;
 };
 
 /**
  * Wrapper around QSharedData for use with KSharedPtr when the object is based on QObject as well.
  * Instead of deleting the object once the reference-count reaches zero, QObject::deleteLater() is called.
  * This prevents a possible crash when the reference-count reaches zero during event-processing while the queue
  * contains events to be delivered to that object.
  *
  * Notice however that the object will not be deleted immediately, which may lead to unintended behavior.
  */
 struct KSharedObject : public QSharedData
 {
     inline explicit KSharedObject(QObject& object) : ref(object, *this)
     {
     }
 
     mutable FakeAtomic ref;
 };
 
 }
 
 #endif