forked from qt-creator/qt-creator
a7956df3ca
Replace the current license disclaimer in files by a SPDX-License-Identifier. Task-number: QTBUG-67283 Change-Id: I708fd1f9f2b73d60f57cc3568646929117825813 Reviewed-by: Eike Ziller <eike.ziller@qt.io>
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
// Copyright (C) 2021 The Qt Company Ltd.
|
|
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
|
|
|
|
#include "qtcassert.h"
|
|
#include "singleton.h"
|
|
|
|
#include <QCoreApplication>
|
|
#include <QList>
|
|
#include <QThread>
|
|
|
|
#include <unordered_map>
|
|
|
|
using namespace Utils;
|
|
|
|
namespace Utils {
|
|
|
|
// The order of elements reflects dependencies, i.e.
|
|
// if B requires A then B will follow A on this list
|
|
static QList<Singleton *> s_singletonList;
|
|
static QMutex s_mutex;
|
|
static std::unordered_map<std::type_index, SingletonStaticData> s_staticDataList;
|
|
|
|
Singleton::~Singleton()
|
|
{
|
|
QMutexLocker locker(&s_mutex);
|
|
s_singletonList.removeAll(this);
|
|
}
|
|
|
|
void Singleton::addSingleton(Singleton *singleton)
|
|
{
|
|
QMutexLocker locker(&s_mutex);
|
|
s_singletonList.append(singleton);
|
|
}
|
|
|
|
SingletonStaticData &Singleton::staticData(std::type_index index)
|
|
{
|
|
QMutexLocker locker(&s_mutex);
|
|
return s_staticDataList[index];
|
|
}
|
|
|
|
// Note: it's caller responsibility to ensure that this function is being called when all other
|
|
// threads don't use any singleton. As a good practice: finish all other threads that were using
|
|
// singletons before this function is called.
|
|
// Some singletons may work only in main thread, so this method should be called from main thread
|
|
// only.
|
|
void Singleton::deleteAll()
|
|
{
|
|
QTC_ASSERT(QThread::currentThread() == qApp->thread(), return);
|
|
QList<Singleton *> oldList;
|
|
{
|
|
QMutexLocker locker(&s_mutex);
|
|
oldList = s_singletonList;
|
|
s_singletonList = {};
|
|
}
|
|
// Keep the reverse order when deleting
|
|
while (!oldList.isEmpty())
|
|
delete oldList.takeLast();
|
|
}
|
|
|
|
} // namespace Utils
|