HOWTO - Qt

#include <QtDebug>

qDebug() << "something"; // #define QT_NO_DEBUG_OUTPUT
qWarning() << "something";
qFatal() << "something"; // + exit the application

QList<QString> list;

list << "foo" << "bar" << "baz";

foreach(QString s, list)
	qDebug() << s;

class MyClass : public QObject
{
	Q_OBJECT

public slots:
protected slots:
private slots:
signals:
};

QThread::run()
QThread::start()
QThread::wait()
QThread::isFinished()
QThread::isRunning()
QThread::terminate()
QThread::finished() // signál

QMutex::lock()
QMutex::tryLock()
QMutex::unlock()
QMutexLocker::QMutexLocker(QMutex* mutex)

QReadWriteLock::lockForRead()
QReadWriteLock::lockForWrite()
QReadLocker::QReadLocker(QReadWriteLock* lock)
QWriteLocker::QWriteLocker(QReadWriteLock* lock)

QSemaphore::acquire()
QSemaphore::tryAcquire()
QSemaphore::release()

QWaitCondition::wait()
QWaitCondition::wakeAll()
QWaitCondition::wakeOne()

QAtomicInt

http://doc.trolltech.com/4.5/threads.html