[Solved]Can't run multiple thread on Linux

[antonyprojr]

I'm trying to develop a program that run two thread for testing in Windows and Linux.
One thread is locked by mutex and another thread increase +10 to int i.
In Windows i get 10,20,30... , but in linux it always display 0.
Apparently the thread are connected, and the second thread never can increase +10 to i.
What is wrong with my code?

@
int i;
QFuture<void>t1;
QFuture<void>t2;

void MainWindow::thread1()
{
QMutex mutex;
QMutexLocker locker(&mutex);
locker.mutex()->lock();
}

void MainWindow::thread2()
{
i += 10;
}

void MainWindow::on_pushButton_clicked()
{
if (!t1.isRunning()) t1 = QtConcurrent::run(this, &MainWindow::thread1);
if (!t2.isRunning()) t2 = QtConcurrent::run(this, &MainWindow::thread2);
QMessageBox *msgbox = new QMessageBox(this);
msgbox->setText(QString::number(i));
msgbox->exec();
}
@

[alexisdm]

If there is only one available thread in the thread pool, it won't execute the thread2 function.

Maybe Qt didn't detect the number of cores/threads of your CPU (I assume it has more than 1 if it works on Windows). That number is returned by QThread::idealThreadCount, which, on linux, uses sysconf(_SC_NPROCESSORS_ONLN), which itself only returns the number of online processors as the name implies (I don't know if power saving affects the number returned by that function).

Anyway, you can force a fixed number of threads with:
@QThreadPool::globalInstance()->setMaxThreadCount(2);@