Making Qt SOAP synchronous / efficiency of an empty while loop in a QThread ?

[nooky59]

Hi,

In my app, I used gSOAP for a long time, which make blocking calls, so it was perfect for my traditionnal QThread design.

I have noticed a problem, on most Linux platform (and Mac OS X I think), but not on Windows, where a float was truncated by the simple fact of instanciating a QApplication object... quite problematic...

So, I would like to use Qt Soap instead but this last one works in an asynchronous fashion and I don't want to reafactor all my app for the moment.

Can I have performance problems with an empy while loop like this, that wait for the answer of the SOAP server ?

http.submitRequest(request, "/");
 
    while(!http.networkReply())
    {
 
    }
 
   // Dealing with the result

http.submitRequest(request, "/");

    while(!http.networkReply())
    {

    }

   // Dealing with the result

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[Lesiok]

Yes, an event loop is blocked. Add to loop one line :

QApplication::processEvents();

QApplication::processEvents();

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[nooky59]

Thanks for your answer, I did not thought about this method...

Even in a QThread this is problematic ?

[Lesiok]

Every thread has own event loop. All asynchronous processes are working with events. How http object can deal with events if You block event loop ?
By the way. It will be better to refactor Your code to properly work in event driven world