Hello Victor,
Victor Haefner wrote:
> I gave up mutex, I tried to work with the osg aspects and changelists
>
> My problem is, if I use different Aspects I need to sync them.. but then
> the main thread will wait for all the other threads before rendering..
> I would like to have the main thread sync the data only when the second
> thread is allready waiting! is there a method to get the number of
> thread which are allready waiting at a barier?
no, there is no such function. However, you could add a int variable
that is set (atomically) in your update thread to 1 and enter the
barrier. Your render thread checks (atomically) if the value is not 0.
In that case it performs the sync and decrements the value again.
For practical purposes a volatile bool often works as well, although
there are possibly cases where it may not do the right thing.
Cheers,
Carsten
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