[Qt-interest] efficient Wait for Thread finished?

[Arnold Krille]

On Tuesday 20 January 2009 11:00:08 Matthias Pospiech wrote:
> I have a QThread which saves my data. If my simulation is faster than
> the data was saved, I have to delay the simulation.
> Currently that looks like the following:
> #ifndef _DELAY_H
> #define _DELAY_H
> #include <QtCore/QTime>
> inline void delay(long ms)  //  Zeit im ms
> {
>         QTime time;
>         time.start();
>         while (time.elapsed()<ms);
> }
> #endif
> void SaveDataThread::reset()
> {
>     // only reset if not running anymore
>     while (isRunning()) {
>         delay(200);
>     }
> ...
> }
> Is this method ok? Or is the delay comsumming CPU and therefore
> additionally blocking the Thread?
> How should it look like?

How is your simulation transfering the data to the save-thread? Via Qt-ways? 
Then why not control access to the save-thread with a mutex and use the 
automatic wait of QMutex::lock() / QMutexLocker()?

Arnold
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