[Qt-interest] query on QCoreApplication:exec()

[Prasanta Sadhukhan]

Hi,

 From http://doc.trolltech.com/4.4/threads.html, I found that
/Note that QCoreApplication::exec 
<http://doc.trolltech.com/4.4/qcoreapplication.html#exec>() must always 
be called from the main thread (the thread that executes main()), not 
from a QThread <http://doc.trolltech.com/4.4/qthread.html>. In GUI 
applications, the main thread is also called the GUI thread because it's 
the only thread that is allowed to perform GUI-related operations.

/but in the attached application, I tried creating a linux thread from 
main and tries to call exec from the spawned thread and exec works.
I guess as per above line, exec() should only be calling from thread 
running main() and not from the spawned thread, am I right?
My question is is any thread a main thread so long it's not spawned by 
QThread api?

Regards
Prasanta
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