How to interrupt QScriptValu::call()

Hello,

I have an application, in which a thread is executing a qscript function

Code:

---

ExecuteThread::ExecuteThread(QString code, QObject *parent) :
    QThread(parent)
{
    this->code = code;
    this->result = 0;
    ExecuteEngine = new QScriptEngine();
}
 
void ExecuteThread::run(){
    ExecuteEngine = new QScriptEngine();
    QScriptValue fun =  ExecuteEngine->evaluate("(" + code + ")");
    QScriptValue val = fun.call();
    result = val.toInteger();
    delete ExecuteEngine;
}
 
int ExecuteThread::getResult(){
    return result;
}
 
void ExecuteThread::stop(){
    ExecuteEngine->abortEvaluation(QScriptValue(-100));
    exit(0);
}

---

Everything works fine, until there is an infinte loop in the QScript-function, then the thread stops at fun.call() and I can't delete the thread any more neither after calling stop() nor calling terminate(). Could you please tell me what I have to do in this case?

Search the forum, please. There has been a similar discussion few months ago.

Yes I know, I have seen it and it worked, but I wasn't able to get my return statement by the method they used in this thread: http://www.qtcentre.org/threads/5010...all()?p=225108

I meant this discussion of course: http://www.qtcentre.org/threads/4769...ptValue-call()

Please help me

If I knew another method, I would have suggested it in that thread. And I don't quite understand what you mean by that you couldn't get your return statement.

When I have for example the following qscript function:

Code:

---

function(var xy){
if(xy == 15){
xy = xy*2;
}
var xx = xy*3;
return xx;
}

---

I can get the returned value by

Code:

---

QScriptValue fun =  ExecuteEngine->evaluate("(" + code + ")");
    QScriptValue val = fun.call();
    result = val.toInteger();

---

But how can I do it without using the call function and is that possible at all?

My suggestion from the other thread was not using call(). If you use evaluate(), it returns the result of the code it evaluates. Thus if you evaluate a function, it will return a result of that function.

Why won't it work then, if I use this code? result is 0 instead of 115

Code:

---

ExecuteEngine = new QScriptEngine();
    QScriptContext *context = ExecuteEngine->pushContext();
    QScriptValue v = context->activationObject();
    v.setProperty("fun", "fun(){return 115;}");
    result = ExecuteEngine->evaluate("fun()").toInteger();
    ExecuteEngine->popContext();
    delete ExecuteEngine;

---

This is what your code returns:

Quote:

---

"TypeError: Result of expression 'fun' [fun(){return 115;}] is not a function."

---

so your function code is plain wrong :)

Here is the proper code:

Code:

---

#include <QtGui>
#include <QtScript>
 
int main(int argc, char **argv) {
    QApplication app(argc, argv);
    QScriptEngine engine;
    QScriptContext *context = engine.pushContext();
    QScriptValue v = context->activationObject();
    v.setProperty("fun", engine.evaluate("(function(){return 115;})"));
    QScriptValue result = engine.evaluate("fun()");
    engine.popContext();
    qDebug() << result.toString();
    return 0;
}

---

Ah now I understand and it's working too.

Thanks a lot :)