static QEventLoop strange behavior

[SABROG]

I have this code:

#include <QtCore/QCoreApplication>
#include <QtCore/QtGlobal>
#include <QtCore/QtDebug>
#include <QtCore/QEventLoop>
#include <QtCore/QTimer>
 
#define USE_LOOP2 0
 
#if USE_LOOP2 == 1
static QEventLoop *loop2=0;
#endif
 
class Base
{
public:
    Base()
    {
#if USE_LOOP2 == 1
        loop2 = new QEventLoop;
#endif
    };
    virtual void foo() = 0;
    static QEventLoop * eventLoop()
    {
#if USE_LOOP2 == 1
        return loop2;
#else
        if (loop) {
            return loop;
        } else {
            return new QEventLoop(qApp);
        }
#endif
    }
    virtual ~Base(){};
private:
#if USE_LOOP2 != 1
    static QEventLoop *loop;
#endif
};
 
#if USE_LOOP2 != 1
QEventLoop *Base::loop=0;
#endif
 
class A : public Base
{
public:
    A(){}
    virtual ~A(){}
    void foo()
    {
        qDebug() << "Run exec...";
        qDebug() << eventLoop()->exec();
        qDebug() << "Exit exec...";
    }
};
 
int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    A a;
    QTimer::singleShot(6000, a.eventLoop(), SLOT(quit()));
    a.foo();
    QTimer::singleShot(6000, &app, SLOT(quit()));
    return app.exec();
}

#include <QtCore/QCoreApplication>
#include <QtCore/QtGlobal>
#include <QtCore/QtDebug>
#include <QtCore/QEventLoop>
#include <QtCore/QTimer>

#define USE_LOOP2 0

#if USE_LOOP2 == 1
static QEventLoop *loop2=0;
#endif

class Base
{
public:
    Base()
    {
#if USE_LOOP2 == 1
        loop2 = new QEventLoop;
#endif
    };
    virtual void foo() = 0;
    static QEventLoop * eventLoop()
    {
#if USE_LOOP2 == 1
        return loop2;
#else
        if (loop) {
            return loop;
        } else {
            return new QEventLoop(qApp);
        }
#endif
    }
    virtual ~Base(){};
private:
#if USE_LOOP2 != 1
    static QEventLoop *loop;
#endif
};

#if USE_LOOP2 != 1
QEventLoop *Base::loop=0;
#endif

class A : public Base
{
public:
    A(){}
    virtual ~A(){}
    void foo()
    {
        qDebug() << "Run exec...";
        qDebug() << eventLoop()->exec();
        qDebug() << "Exit exec...";
    }
};

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    A a;
    QTimer::singleShot(6000, a.eventLoop(), SLOT(quit()));
    a.foo();
    QTimer::singleShot(6000, &app, SLOT(quit()));
    return app.exec();
}

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If i use global static pointer loop2 - all work. If i use static loop pointer as member for class Base - event never exit (in my other program exec() just return -1 value). For test you can change USE_LOOP2 to 0 or 1 and try yourself.

[caduel]

assign the "new QEventLoop" to your variable loop in or before line 31...

[SABROG]

Thanks, solved. My mistake, need more sleep.