template< typename T >
class ThreadSafeList{
Q_DISABLE_COPY(ThreadSafeList)
public:
    ThreadSafeList():
        m_lock{},
        m_list{}
    {}
    virtual ~ThreadSafeList(){}
    QList<T>& lockForRead(){
        m_lock.lockForRead();
        return m_list;
    }
    QList<T>& lockForWrite(){
        m_lock.lockForWrite();
        return m_list;
    }
    //don't forget call this method after lockForRead()/lockForWrite()
    //and don't use reference to m_list after call unlock
    void unlock(){
        m_lock.unlock();
    }
private:
    QReadWriteLock m_lock;
    QList<T> m_list;
};