linphone-desktop/Linphone/tool/thread/SafeSharedPointer.hpp
Julien Wadel cd82964b23 Replace postAsync functions by SafeConnection in order to make more robust thread connections and guarantee to have always caller/callee while processing signals.
Introduce ObjectCore, ObjectGui, ObjectModel.
Simulate addAccount signals on adding account (in waiting for SDK callback).
2023-11-22 14:55:38 +01:00

78 lines
2 KiB
C++

/*
* Copyright (c) 2010-2024 Belledonne Communications SARL.
*
* This file is part of linphone-desktop
* (see https://www.linphone.org).
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef SAFE_SHARED_POINTER_H_
#define SAFE_SHARED_POINTER_H_
#include <QDebug>
#include <QSharedPointer>
// Store a Qt/Std shared pointer
template <typename A>
class SafeSharedPointer {
public:
QSharedPointer<A> mQData;
QWeakPointer<A> mQDataWeak;
std::shared_ptr<A> mStdData;
std::weak_ptr<A> mStdDataWeak;
int mCountRef = 0;
SafeSharedPointer(QSharedPointer<A> p) : mQDataWeak(p) {
}
SafeSharedPointer(std::shared_ptr<A> p) : mStdDataWeak(p) {
}
bool lock() {
if (mCountRef == 0) {
if (!mQDataWeak.isNull()) {
mQData = mQDataWeak.lock();
if (mQData) ++mCountRef;
return !mQData.isNull();
} else if (!mStdDataWeak.expired()) {
mStdData = mStdDataWeak.lock();
if (mStdData) ++mCountRef;
return mStdData != nullptr;
}
return false;
} else {
++mCountRef;
return true;
}
}
void unlock() {
if (mCountRef == 0) qWarning() << "[SafeConnection] too much unlocking";
else if (--mCountRef == 0) {
mQData = nullptr;
mStdData = nullptr;
}
}
void reset() {
mQData = nullptr;
mStdData = nullptr;
mCountRef = 0;
}
A *get() {
if (mQData) return mQData.get();
if (mStdData) return mStdData.get();
return nullptr;
}
};
#endif