#include "application.h" Application::Application(int &argc, char **argv) :QApplication(argc, argv) { m_single = new QSharedMemory("ShredMemoryForOneInstanceOfProdejnaApp", this); } Application::~Application() { if (m_single->isAttached()) { m_single->detach(); } } bool Application::lock() { if (m_single->attach(QSharedMemory::ReadOnly)) { m_single->detach(); return false; } if (m_single->create(1)) { return true; } return false; }