<![CDATA[OpenMP and processEvents()]]>Hello,
I'm facing a problem when trying to refresh GUI during a big computation.
I have something like this
@
int main()
{
#pragma omp parallel for
for( int i=0; i<stop; i++ )
heavyStuff(i);
}

void heavyStuff(int i)
{
for( int j=0; j<maxJ;j++ )
{
// lengthy computation
doSomething();

     // would like to processEvents here, but we are in a thread!
    qApp->processEvents();

}
@

]]>https://forum.qt.io/topic/42492/openmp-and-processeventsRSS for NodeWed, 13 May 2026 06:44:22 GMTFri, 13 Jun 2014 07:23:26 GMT60<![CDATA[Reply to OpenMP and processEvents() on Fri, 13 Jun 2014 12:21:10 GMT]]>[quote]void QCoreApplication::processEvents()

Processes all pending events for the calling thread according to the specified flags until there are no more events to process.[/quote]

So, yes. It should be "okay". But it only processes the pending events for the calling thread. You probably want to call this from the "main" thread - at least if your goal is to keep the UI "responsive" during a lengthy operation.

]]>https://forum.qt.io/post/231836https://forum.qt.io/post/231836Fri, 13 Jun 2014 12:21:10 GMT<![CDATA[Reply to OpenMP and processEvents() on Fri, 13 Jun 2014 08:37:02 GMT]]>Thanks for looking at my problem.
Is that ok to call qApp->processEvents(); from any thread?

]]>https://forum.qt.io/post/231820https://forum.qt.io/post/231820Fri, 13 Jun 2014 08:37:02 GMT<![CDATA[Reply to OpenMP and processEvents() on Fri, 13 Jun 2014 07:29:31 GMT]]>Sorry but I haven't understand your problem ?? what problem r u facing ??

]]>https://forum.qt.io/post/231812https://forum.qt.io/post/231812Fri, 13 Jun 2014 07:29:31 GMT