/usr/include/kdevplatform/util/ksharedobject.h is in kdevelop-dev 4:5.2.1-1ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | /*
Copyright 2009 David Nolden <david.nolden.kdevelop@art-master.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#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 load() const {
return m_real.ref.load();
}
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
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