Russian Qt Forum

#include <QtCore>
class SleepThread : public QThread
{
public:
    SleepThread(QObject *parent = 0) : QThread(parent)
    {
    }
    ~SleepThread()
    {
    }
protected:
    void run()
    {
        str = "1\t2\t1 000\t14 000\t15 000\t16 000\t17 000\t50 000\t100 000\t";
        qDebug() << str << endl;
        str.clear();

        for (int i = 0; i < 20; ++i) {
            testUSleep(1);
            testUSleep(2);
            testUSleep(1000);
            testUSleep(14000);
            testUSleep(15000);
            testUSleep(16000);
            testUSleep(17000);
            testUSleep(50000);
            testUSleep(100000);
            qDebug() << str << endl;
            str.clear();
        }
    }
private:
    QString str;
    QTime t1, t2;

    void testUSleep(int t)
    {
        t1 = QTime::currentTime();
        usleep(t);
        t2 = QTime::currentTime();
        str += QString::number(t1.msecsTo(t2)) + "\t";
    }

};

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    SleepThread sleeper;
    sleeper.start(QThread::TimeCriticalPriority);
    sleeper.wait();
    return a.exec();
}

"1	2	1 000	14 000	15 000	16 000	17 000	50 000	100 000	" 
"0	0	0	15	32	15	16	47	109	" 
"0	0	0	16	15	16	16	62	94	" 
"0	15	0	16	16	15	16	47	109	" 
"0	0	0	16	15	32	15	47	110	" 
"0	0	0	15	16	15	16	63	93	" 
"0	0	16	16	15	16	15	47	110	" 
"0	0	0	15	16	16	31	47	93	" 
"16	0	0	16	15	16	16	62	94	" 
"0	0	0	15	32	15	16	47	109	" 
"0	0	0	16	15	16	16	62	94	" 
"0	16	0	15	16	15	16	47	109	" 
"0	0	0	16	16	31	15	47	110	" 
"0	0	0	15	16	16	15	63	93	" 
"0	0	16	16	15	16	16	46	110	" 
"0	0	0	15	16	16	31	47	94	" 
"15	0	0	16	15	16	16	62	94	" 
"0	0	0	16	31	15	16	47	109	" 
"0	0	0	16	16	15	16	62	94	" 
"0	16	0	15	16	16	15	47	109	" 
"0	0	0	16	16	31	16	46	110	" 

QTime t_time;
for(;t_time<elapsed(1000);)
{
qApp->processEvents();
}